Harbor ETF Trust Funds Prospectus
Prospectus
Harbor ETF Trust
March 1, 2023
Fund
Exchange
Ticker
 
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor
All-Weather Inflation Focus ETF)
NYSE
HGER
Harbor Corporate Culture ETF
NYSE Arca, Inc.
HAPI
Harbor Corporate Culture Leaders ETF
NYSE Arca, Inc.
HAPY
Harbor Disruptive Innovation ETF
NYSE Arca, Inc.
INNO
Harbor Dividend Growth Leaders ETF
NYSE
GDIV
Harbor Energy Transition Strategy ETF
NYSE Arca, Inc.
RENW
Harbor Health Care ETF
NYSE Arca, Inc.
MEDI
Harbor International Compounders ETF
NYSE Arca, Inc.
OSEA
Harbor Long-Term Growers ETF
NYSE
WINN
Harbor Scientific Alpha High-Yield ETF
NYSE Arca, Inc.
SIHY
Harbor Scientific Alpha Income ETF
NYSE Arca, Inc.
SIFI
The Securities and Exchange Commission (SEC) and the Commodity Futures Trading Commission (CFTC) have not approved any Fund’s shares as an investment or determined whether this Prospectus is accurate or complete. Anyone who tells you otherwise is committing a crime.


Table of Contents
 
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66

Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF)
Fund Summary
Investment Objective
The Fund seeks to provide investment results that correspond, before fees and expenses, to the performance of the Quantix Commodity Index (formerly, the Quantix Inflation Index) (the “Index”).
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.68%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.68%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund (inclusive of any expenses of a wholly owned subsidiary of the Fund), except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Cost
$69
$218
$379
$847
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. During the most recent fiscal year, the Fund did not have a portfolio turnover rate because the Fund invested only in instruments that are excluded from portfolio turnover rate calculations.
Principal Investment Strategy
The Fund seeks to provide investment results that correspond, before fees and expenses, to the performance of the Index, which was developed by Quantix Commodities Indices LLC (“QCI” or the “Index Provider”), an affiliate of Quantix Commodities LP, the Fund’s subadvisor (“Quantix” or the “Subadvisor”). The Index is composed of futures contracts on physical commodities and is constructed using QCI’s proprietary quantitative methodology, which considers a commodity’s relative inflation sensitivity and the relative cost of holding a “rolling” futures position in the commodity (as described below).
Under normal market conditions, the Index contains at least 15 U.S. dollar-denominated commodity futures traded on exchanges in the United States and United Kingdom. A commodity futures contract is a legal agreement to buy or sell a particular commodity (for example, metals, oil or agricultural products) at a predetermined price at a specified time in the future. As of the date of this Prospectus, the following commodity futures are considered for inclusion in the Index: WTI crude oil, Brent crude oil, heating oil, gasoil, RBOB gasoline, natural gas, corn, wheat, KC wheat, soybeans, soymeal, soybean oil, cocoa, cotton, coffee, sugar, live cattle, lean hogs, copper, aluminum, nickel, zinc, gold and silver.
Commodity futures in the eligible universe are selected for the Index and weighted based on Quantix’s quantitative methodology, which involves five steps:
Step 1: Quantix calculates the economic significance of each eligible commodity futures contract (i.e., the weight of each such commodity futures contract relative to the size of the eligible universe).
Step 2: Quantix calculates a “quality score” for each eligible commodity futures contract based on (i) the sensitivity of the futures contract to inflation and (ii) the cost of holding a rolling futures position in the contract. “Rolling” means selling a futures contract as it nears its expiration date and replacing it with a new futures contract that has a later expiration date. If the price for the new futures contract is lower than the price of the expiring contract, then the market for the commodity is said to be in “backwardation.” In these markets, roll returns are positive. The term “contango” is used to describe a market in which the price for a new futures contract is higher than the price of the expiring contract. In these markets, roll returns are negative. The quality score is negative for commodity futures contracts that have a relatively lower inflation sensitivity and/or roll return and positive for commodity futures contracts that have a relatively higher inflation sensitivity and/or roll return.
Step 3: The weights of eligible commodity futures contracts determined based on their economic significance are then adjusted based on their quality scores. A relatively low quality score results in a weight lower than the economic significance weight and a relatively high quality score results in a weight higher than the economic significance weight.
Step 4: Quantix applies maximum sector weights and maximum and minimum commodity weights to ensure diversification within the Index.
Step 5: Quantix utilizes its proprietary “Scarcity Debasement Indicator” (“SDI”) to determine whether the weight of gold-linked futures contracts should be adjusted based on the market environment. If the SDI signals an environment where inflation is more likely a result of a general shortage of commodities relative to demand, the weight of gold-linked futures contracts is as determined by steps 1 through 4. If the SDI signals an environment where inflation is more likely a result of currency debasement

1

Fund Summary
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF)
(i.e., a weakening currency), the weight of gold-linked futures contracts is increased in accordance with the strength of the indicator.
The Index is calculated on a “total return” basis, meaning that the returns of the futures contracts included in the Index are combined with the returns on cash collateral invested in 13-week U.S. Treasury Bills. Under normal circumstances, the Index is reconstituted quarterly. QCI, as provider of the index, is responsible for index construction. The Index has been licensed to the Advisor by QCI and is calculated, published and distributed by Solactive AG (“Solactive”).
The Fund seeks to achieve its investment objective primarily by investing, through its Subsidiary (as defined below), in one or more excess return swaps on the Index. Excess return swaps are derivative contracts between two parties who exchange the return from a financial asset between them. The Fund will make payments to a swap dealer counterparty based on a set rate in exchange for payments based on the returns of the futures contracts comprising the Index. If the returns on those securities are positive, the counterparty will pay the Fund; in the event that the returns are negative, the Fund will make payments to the counterparty. The swaps may be terminated by the Subadvisor at any time. The Fund also holds U.S. Treasury securities and/or money market funds, which may be used as collateral for the Fund’s derivatives holdings or to generate interest income and capital appreciation on the cash balances arising from its use of derivatives (thereby providing a “total return” investment in the underlying commodity futures contracts).
The Fund may invest in commodity futures contracts if it at any time it is impractical or inefficient to gain full or partial exposure to a commodity through the use of excess return swaps, including on a different commodity (including commodities not included in the Index) that the Subadvisor believes will help the Fund achieve its investment objective.
To the extent that a significant portion of the Index consists of a particular sector or commodity, the Fund may have significant exposure to that sector or commodity. As of the date of this Prospectus, a significant portion of the Index consists of, and therefore the Fund has significant exposure to, the petroleum and precious metals sectors.
The Fund will invest up to 25% of its total assets, as determined at the end of each fiscal quarter, in a wholly owned and controlled subsidiary (the “Subsidiary”) organized under the laws of the Cayman Islands. The Fund’s investment in the Subsidiary is expected to provide the Fund with exposure to commodity returns within the limits of the federal tax laws, which limit the ability of investment companies such as the Fund to invest directly in such instruments. The Subsidiary has the same investment objective and will follow the same general investment policies and restrictions as the Fund. Unlike the Fund, the Subsidiary may invest without limitation in commodity-linked derivative instruments. Except as noted, references to the Fund’s investment strategies and risks include those of its Subsidiary. The Subsidiary is advised by Harbor Capital Advisors, Inc. (“Harbor Capital” or the “Advisor”) and subadvised by the Subadvisor.
The Fund is classified as non-diversified, which means the Fund may invest in the securities of a smaller number of issuers than a diversified fund.
Principal Risks
Investors considering an investment in the Fund should be prepared to accept significant volatility in the Fund’s performance, particularly over shorter time periods. The Fund is not intended to serve as a core holding in an investor’s portfolio but instead should represent only a small portion of an investor’s overall diversified portfolio. Investors considering an investment in this Fund should be sure they carefully read and understand the investment strategies employed and the heightened risks associated with those strategies.
There is no guarantee that the investment objective of the Fund will be achieved. Commodities and commodity-linked derivative instruments can be significantly more volatile than other securities, such as stocks or bonds. Similarly, the Index can be significantly more volatile than broad market equity and fixed income indices. The value of your investment in the Fund may go down, which means that you could lose money on your investment in the Fund or the Fund may not perform as well as other possible investments. Principal risks impacting the Fund (in alphabetical order after the first eight) include:
Commodity Risk: The Fund has exposure to commodities through its and/or the Subsidiary’s investments in commodity-linked derivative instruments. Commodity prices are generally affected by, among other factors, the cost of producing, transporting and storing commodities, changes in consumer or commercial demand for commodities, the hedging and trading strategies of producers and consumers of commodities, speculative trading in commodities by commodity pools and other market participants, disruptions in commodity supply, weather, political and other global events, global economic factors and government intervention in or regulation of the commodity or commodity futures markets. The Fund may concentrate its assets in a particular sector of the commodities market (such as oil, metal or agricultural products) in order to seek to track the Index. As a result, the Fund may be more susceptible to risks associated with those sectors.
Excess Return Swaps Risk: Excess return swaps could result in losses if the underlying asset or reference does not perform as anticipated. Excess return swaps can have the potential for unlimited losses. They are also subject to counterparty risk. If the counterparty fails to meet its obligations, the Fund may lose money.
Index Construction Risk: QCI selects a limited number of commodity futures contracts for the Index based on its proprietary methodology. The theories and assumptions upon which QCI bases the Index and/or the methodology used in constructing the Index may be inaccurate. The Fund may outperform or underperform other funds that invest in similar asset classes but employ different investment styles. QCI’s assessment of a commodity and/or futures contract may differ from that of another investor or investment manager. Errors in the construction or calculation of the Index may occur from time to time and any such errors may not be immediately identified and corrected by QCI or Solactive, respectively, which may have an adverse impact on the Fund and its shareholders. There is no guarantee that the construction methodology will accurately provide the intended exposure.
Sector Risk: To the extent that the Fund has significant exposure to a particular sector or commodity, the Fund will be subject to the risk that economic, political or other conditions that have a negative effect on that sector or commodity will negatively impact the Fund to a greater extent than if the Fund’s assets were invested in a wider variety of sectors or commodities.
Index Tracking Risk: The Fund is not expected to track the performance of the Index at all times with perfect accuracy. The Fund’s return may not track the performance of the Index for a

2

Fund Summary
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF)
number of reasons. For example, tracking error may occur because of differences between the securities and other financial instruments held in the Fund’s portfolio and those included in the Index, pricing differences (including, as applicable, differences between a security’s price at the local market close and the Fund’s valuation of a security at the time of calculation of the Fund’s NAV), transaction costs incurred by the Fund, or the Fund’s holding of uninvested cash, differences in timing of the accrual of or the valuation of dividends or interest. Any transaction costs and market exposure arising from rebalancing the Fund’s portfolio to reflect changes in the composition of the Index will be borne directly by the Fund and its shareholders. The Fund may not be able to invest in certain securities included in the Index or may not be able to invest in them in the exact proportions in which they are represented in the Index, due to legal restrictions, potential adverse tax consequences or other regulatory reasons. The risk that the Fund may not track the performance of the Index may be magnified during times of heightened market volatility or other unusual market conditions. For tax efficiency purposes, the Fund may sell certain securities to realize losses causing it to deviate from the Index.
Index Strategy Risk: The Fund is managed to seek to track, before fees and expenses, the performance of the Index. Therefore, unless a specific security is removed from the Index because it no longer qualifies to be included in the Index, the Fund generally would not sell a security because the security’s issuer is in financial trouble. If a specific security is removed from the Index, it is possible that the Fund may be forced to sell such security at an inopportune time or for prices other than at current market values, which could have a negative effect on the Fund’s performance.  As a result, the Advisor will not use techniques or defensive strategies designed to lessen the effects of market volatility or to reduce the impact of periods of market decline. Thus, based on market and economic conditions, the Fund’s performance could be lower than funds that actively shift their portfolio assets to take advantage of market opportunities or to lessen the impact of a market decline or a decline in the value of one or more securities.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market
for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Commodity-Linked Derivatives Risk: The Fund’s investments in commodity-linked derivative instruments (either directly or through the Subsidiary) and the tracking of an Index comprised of commodity futures may subject the Fund to significantly greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by prevailing spot prices for the underlying commodity, supply and demand, market activity, liquidity, economic, financial, political regulatory, geographical, biological or judicial events, and the general interest rate environment. Commodity-linked derivatives are subject to the risk that the counterparty to the transaction, the exchange or trading facility on which they trade, or the applicable clearing house may default or otherwise fail to perform. If all or a significant portion of the futures contracts reflected in the Index were to reach a negative price, you could lose your entire investment. Each trading facility on which the derivatives are traded has the right to suspend or limit trading in the instruments that it lists. Certain of the futures contracts in which the Fund may invest trade on non-U.S. exchanges that impose different requirements than U.S. exchanges. These futures contracts may be subject to additional risks, including greater price volatility, temporary price aberrations and the potential imposition of limits that constrain appreciation or cause depreciation of the prices of such futures contracts, as well as different and longer settlement periods. The Fund will incur certain costs as a result of its use of derivatives. The Fund’s use of commodity-linked derivatives may also have a leveraging effect on the Fund’s portfolio. Leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the Fund otherwise would have had. The Fund is required to post margin in respect to certain of its holdings in derivatives.
Counterparty Risk: A counterparty may be unwilling or unable to meet its contractual obligations. If the counterparty or its affiliate becomes insolvent, bankrupt or defaults ion its payment obligations to the Fund, the value of an investment held by the Fund may

3

Fund Summary
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF)
decline. The Fund may also not be able to exercise remedies, such as the termination of transactions, netting of obligations and realization on collateral if such remedies are stayed or eliminated under special resolutions adopted in the United States or other jurisdictions.
In addition, the Fund may enter into swap agreements with a limited number of counterparties, which may increase the Fund’s exposure to counterparty credit risk. Counterparties may be less willing to enter into transactions in stressed or volatile market conditions or may alter the terms they are willing to accept in such conditions. Further, there is a risk that no suitable counterparties will be willing to enter into, or continue to enter into, transactions with the Fund, which may cause the Fund not to be able to achieve its investment objective or to change its investment objective.
Energy Sector Risk: The performance of energy-related commodities, including petroleum, is generally cyclical and highly dependent on energy prices. The market value of energy-related commodities may decline for many reasons, including, among others: changes in energy prices, exploration and production spending, and energy supply and demand; global political changes; terrorism, natural disasters and other catastrophes; changes in exchange rates; and government regulations, taxation policies, and energy conservation efforts. The energy sector has recently experienced increased volatility. In particular, significant market volatility in the crude oil markets as well as the oil futures markets resulted in the market price of the front month WTI crude oil futures contract falling below zero for a period of time.
Interest Rate Risk: As interest rates rise, the values of fixed income securities held by the Fund are likely to decrease and reduce the value of the Fund’s portfolio. Securities with longer durations tend to be more sensitive to changes in interest rates and are usually more volatile than securities with shorter durations. For example, a 5 year average duration generally means the price of a fixed income security will decrease in value by 5% if interest rates rise by 1%. Rising interest rates may lead to increased redemptions, increased volatility and decreased liquidity in the fixed income markets, making it more difficult for the Fund to sell its fixed income securities when the Subadvisor may wish to sell or must sell to meet redemptions. During periods when interest rates are low or there are negative interest rates, the Fund’s yield (and total return) also may be low or the Fund may be unable to maintain positive returns or minimize the volatility of the Fund’s net asset value per share. Changing interest rates may have unpredictable effects on the markets, may result in heightened market volatility and may detract from Fund performance. In addition, changes in monetary policy may exacerbate the risks associated with changing interest rates.
Investment in Other Investment Companies Risk: Investments in other investment companies (including money market funds) are subject to market and selection risk. In addition, if the Fund acquires shares of investment companies, shareholders bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the investment companies.
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Non-Diversification Risk: Because the Fund is non-diversified and may invest a greater percentage of its assets in securities of a single issuer, and/or invest in a relatively small number of issuers, it is more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio.
Precious Metals Investment Risk: Prices of precious metals, including gold and silver, and of precious metal-related financial instruments historically have been very volatile and may fluctuate sharply over short periods of time. The high volatility of precious metals prices may adversely affect the prices of financial instruments that derive their value from the price of underlying precious metals. The production and sale of precious metals by governments or central banks or other larger holders can be affected by various economic, financial, social and political factors, which may be unpredictable and may have a significant impact on the prices of precious metals.
Subsidiary Risk: By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. The derivatives and other investments held by the Subsidiary generally are similar to those that are permitted to be held by the Fund and are subject to the same risks that apply to similar investments if held directly by the Fund. The Subsidiary is not registered under the Investment Company Act of 1940 (the “Investment Company Act”), and, unless otherwise noted in this prospectus, is not subject to all of the investor protections of the Investment Company Act. In addition, changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as described in this Prospectus and the Statement of Additional Information and could adversely affect the Fund.
Tax Risk: The ability of the Fund to gain commodity exposure as contemplated may be adversely affected by future legislation, regulatory developments, interpretive guidance or other actions by the Internal Revenue Service (“IRS”) or the Treasury Department
U.S. Treasury Obligations Risk: U.S. Treasury obligations may differ from other securities in their interest rates, maturities, times of issuance and other characteristics. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s exposure to U.S. Treasury obligations to decline.
Performance
Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.

4

Fund Summary
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF)
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
Quantix Commodities LP (“Quantix”) has subadvised the Fund since 2022.
Portfolio Manager
The  portfolio manager is responsible for the day-to-day investment decision making for the Fund.
(MATTHEW SCHWAB PHOTO)
Matthew Schwab
Quantix Commodities LP
Mr. Schwab is a Portfolio Manager at Quantix and has served as a portfolio manager for the Fund since February 2022.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

5

Harbor Corporate Culture ETF
Fund Summary
Investment Objective
The Fund seeks to provide investment results that correspond, before fees and expenses, to the performance of the CIBC Human Capital Index (the “Index”).
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.35%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1,2
0.00%
Acquired Fund Fees and Expenses2
0.01%
Total Annual Fund Operating Expenses
0.36%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
2“Other Expenses” and “Acquired Fund Fees and Expenses” are estimated for the current fiscal year.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Cost
$37
$116
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. For the period from October 12, 2022 through October 31, 2022, the Fund’s portfolio turnover rate was 2%. Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
The Fund employs an indexing investment approach designed to track the performance of the Index. The Fund invests at least 80% of its total assets in securities that are included in the Index.
The Index consists of a modified market capitalization-weighted portfolio of equity securities of approximately 150 U.S. companies identified by Irrational Capital LLC (“Irrational Capital”) as those it believes to possess strong corporate culture based on its proprietary scoring methodology. The Index was developed by the Canadian Imperial Bank of Commerce (“CIBC”).
Irrational Capital calculates Human Capital Factor scores based on a proprietary, rules-based scoring methodology it developed by leveraging its research in behavioral science, data science and human capital. The scoring methodology seeks to quantitatively measure the contribution of a company’s corporate culture to its financial performance. Irrational Capital calculates Human Capital Factor scores based on a combination of multiple characteristics, such as
Employee engagement and motivation
Trust and transparency
Point of view diversity
Compensation fairness
The significance of each characteristic to the calculation of the Human Capital Factor scores varies at the time of each calculation based on the most recent data obtained by Irrational Capital. Irrational Capital expects to continue to refine its proprietary methods over time.
Constituents of the Solactive GBS United States 500 Index, which intends to track the performance of the largest 500 companies from the U.S. stock market (the “index universe”), at the time of Index reconstitution are eligible for inclusion in the Index. Each company in the index universe that is also identified by Irrational Capital on its list of high-scoring companies (based on the most current scores as of each reconstitution) will be included in the Index. Index constituents in the same sector are weighted based on their float-adjusted market capitalizations, subject to certain caps on individual stock weights. On reconstitution dates, the Index will target the same sector weights as the index universe. If after the Index’s weighting and capping rules are applied, a sector’s weight in the Index would be less than its weight in the index universe, the Index will include exchange-traded funds that invest specifically in the stocks and securities of the corresponding sector (known as sector ETFs), or such other sector proxy as the CIBC may determine, to fill the remaining weight and ensure sector neutrality as compared with the index universe on the reconstitution date.
The Index has been created and licensed to Harbor Capital Advisors, Inc. (the “Advisor or “Harbor Capital”) by the CIBC and is calculated, published and distributed by Solactive AG (“Solactive”). The Index is comprised of equity securities traded on U.S. public securities exchanges as well as sector ETFs. The Fund may purchase American Depositary Receipts (ADRs), which are certificates typically issued by a bank or trust company that represent ownership interests in securities issued by a foreign or domestic company. The Fund may concentrate its investments in a particular sector, industry or group of industries from time to time to the extent that the Index concentrates in a sector, industry or group of industries. As of the date of this Prospectus, the Index is concentrated in, and therefore the Fund has significant exposure to, the

6

Fund Summary
Harbor Corporate Culture ETF
information technology sector. Under normal circumstances, the Index is reconstituted annually.
The Fund uses an indexing investment approach to attempt to approximate, before fees and expenses, the investment performance of the Index. The Fund generally will use a replication strategy, which means that the Fund seeks to hold each security found in the Index (including shares of sector ETFs included in the Index) in approximately the same proportion as represented in the Index itself. There also may be instances in which the Advisor may choose to underweight or overweight a security in the Index, purchase securities not in the Index that the Advisor believes are appropriate to substitute for certain securities in the Index or utilize various combinations of other available investment techniques in seeking to replicate as closely as possible, before fees and expenses, the performance of the Index. The Fund may sell securities that are represented in the Index in anticipation of their removal from the Index or purchase securities not represented in the Index in anticipation of their addition to the Index. The Fund does not take temporary defensive positions when markets decline or appear overvalued.
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first eight risks) include:
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Equity Risk: The values of equity or equity-related securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Index Tracking Risk: The Fund is not expected to track the performance of the Index at all times with perfect accuracy. The Fund’s return may not track the performance of the Index for a number of reasons. For example, tracking error may occur because of differences between the securities held in the Fund’s portfolio and those included in the Index, pricing differences (including, as applicable, differences between a security’s price at the local market close and the Fund’s valuation of a security at the time of calculation of the Fund’s NAV), transaction costs incurred by the Fund, or the Fund’s holding of uninvested cash, differences in timing of the accrual of or the valuation of dividends or interest. Any transaction costs and market exposure arising from rebalancing the Fund’s portfolio to reflect changes in the composition of the Index will be borne directly by the Fund and its shareholders. The Fund may not be able to invest in certain securities included
in the Index or may not be able to invest in them in the exact proportions in which they are represented in the Index, due to legal restrictions, potential adverse tax consequences or other regulatory reasons. The risk that the Fund may not track the performance of the Index may be magnified during times of heightened market volatility or other unusual market conditions. For tax efficiency purposes, the Fund may sell certain securities to realize losses causing it to deviate from the Index.
Index Strategy Risk: The Fund is managed to seek to track, before fees and expenses, the performance of the Index. Therefore, unless a specific security is removed from the Index because it no longer qualifies to be included in the Index, the Fund generally would not sell a security because the security’s issuer is in financial trouble. If a specific security is removed from the Index, it is possible that the Fund may be forced to sell such security at an inopportune time or for prices other than at current market values, which could have a negative effect on the Fund’s performance.  As a result, the Advisor will not use techniques or defensive strategies designed to lessen the effects of market volatility or to reduce the impact of periods of market decline. Thus, based on market and economic conditions, the Fund’s performance could be lower than funds that actively shift their portfolio assets to take advantage of market opportunities or to lessen the impact of a market decline or a decline in the value of one or more securities.
Index Construction Risk: The Index Provider selects companies for the Index based on a proprietary methodology. The theories upon which the Index Provider bases the Index and/or Irrational Capital bases the methodology used in scoring companies for the Index may be unsound. The Index Provider and Irrational Capital rely on third-party data they believe to be reliable in constructing the Index and scoring companies, but neither guarantees the accuracy or availability of any such third-party data, and there is also no guarantee with respect to the accuracy, availability or timeliness of the production of the Index. The Fund may outperform or underperform other funds that invest in similar asset classes but employ different investment styles. Companies will be excluded from the Index if sufficient data is not available to produce a score, which may result in the exclusion of companies that could otherwise be considered to have strong corporate culture. The Index Provider’s assessment of a company may differ from that of another investor or investment manager. Errors in the construction or calculation of the Index may occur from time to time and any such errors may not be immediately identified and corrected, which may have an adverse impact on the Fund and its shareholders. There is no guarantee that the construction methodology will accurately provide exposure to strong corporate culture. The use of sector ETFs or other sector proxies to maintain sector neutrality may result in indirect exposure to companies that do not have strong corporate culture and would not otherwise be included in the Index.
Data Risk: The Index Provider relies heavily on information and data provided by third-parties, including the list of high scoring companies provided by Irrational Capital and used to select companies for the Index. Such third-party data includes information derived from survey data. There is no guarantee that survey data will be accurate, complete or representative of a company’s status with respect to its corporate culture. Survey data may be subject to certain biases, including response bias and non-response bias. Furthermore, information derived from survey data may not reflect the most current status of a company, and a company’s financial results may deteriorate prior to a corresponding decline in survey data results. Because the Index is reconstituted only annually, there could be a significant delay before a company’s current status is reflected in the Index. If survey data is unreliable or outdated, the Index may not be successful in providing the specified exposure.

7

Fund Summary
Harbor Corporate Culture ETF
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Concentration Risk: The Fund’s assets may be concentrated in a particular sector, industry or group of industries to the extent the Index is so concentrated. Concentration of the Fund’s assets in a particular sector, industry or group of industries will subject the Fund to the risk that economic, political or other conditions that have a negative effect on that sector, industry or group of industries will negatively impact the Fund to a greater extent than
if the Fund’s assets were concentrated in a wider variety of sectors or industries.
Depositary Receipts Risk: Depositary receipts are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the U.S. or elsewhere. The underlying shares are held in trust by a custodian bank or similar financial institution. The depository bank may not have physical custody of the underlying securities at all times and may charge fees for various services, including forwarding dividends and interest and corporate actions. Depositary receipts are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. Depositary receipts are subject to the risks associated with investing directly in foreign securities.
Information Technology Sector Risk: Companies in the information technology sector can be significantly affected by short product cycles, obsolescence of existing technology, impairment or loss of intellectual property rights, falling prices and profits, competition from new market entrants, government regulation and other factors.
Investment in Other Investment Companies Risk: Investments in other investment companies (including money market funds) are subject to market and selection risk. In addition, if the Fund acquires shares of investment companies, shareholders bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the investment companies. In addition to these risks, a sector ETF may fail to accurately track the market segment or index that underlies its investment objective and the market price of the underlying ETF’s shares may trade at a premium or a discount to their net asset value.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Large Cap Risk: Large cap stocks may fall out of favor relative to small or mid cap stocks, which may cause the Fund to underperform other equity funds that focus on small or mid cap stocks.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Performance
Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.

8

Fund Summary
Harbor Corporate Culture ETF
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Portfolio Managers
The  portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.
Stephen Cook, Managing Director, ETFs of Harbor Capital, has managed the Fund since 2022.
James Erceg, Executive Vice President and Head of Product at Harbor Capital, has managed the Fund since 2022.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

9

Harbor Corporate Culture Leaders ETF
Fund Summary
Investment Objective
The Fund seeks to provide investment results that correspond, before fees and expenses, to the performance of the Human Capital Factor Unconstrained Index (the “Index”).
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.50%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.50%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Cost
$51
$160
$280
$628
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. For the period from February 23, 2022 through October 31, 2022, the Fund’s portfolio turnover rate was 18%. Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
The Fund employs an indexing investment approach designed to track the performance of the Index. The Fund invests at least 80% of its total assets in securities that are included in the Index.
The Index is designed to deliver exposure to equity securities of U.S. companies that are “corporate culture leaders” based on scores produced by Irrational Capital LLC (“Irrational Capital” or the “Index Provider”). “Corporate culture leaders” are those companies with high “Human Capital Factor” scores, which are determined by Irrational Capital in accordance with a rules-based methodology that seeks to identify companies that best manage their human capital, resulting in highly motivated and engaged employees. Companies with market capitalizations in excess of $1 billion at the time of Index reconstitution are eligible for inclusion in the Index. The Index is equally weighted and composed of approximately 70 to 100 companies with top Human Capital Factor scores at the time of Index reconstitution.
The Index Provider calculates Human Capital Factor scores based on a proprietary scoring methodology developed by Irrational Capital leveraging its research in behavioral science, data science and human capital. The scoring methodology seeks to quantitatively measure the contribution of a company’s corporate culture to its financial performance. Irrational Capital calculates Human Capital Factor scores based on a combination of multiple characteristics, such as
Employee engagement and motivation
Trust and transparency
Point of view diversity
Compensation fairness
The significance of the various characteristics varies with each reconstitution based on the most current data. The Index Provider expects to continue to refine its proprietary methods over time.
The Index has been created and licensed to the Advisor by Irrational Capital and is calculated, published and distributed by Solactive AG (“Solactive”). The Index is comprised of equity securities traded on U.S. public securities exchanges. The Fund may purchase American Depositary Receipts (ADRs), which are certificates typically issued by a bank or trust company that represent ownership interests in securities issued by a foreign or domestic company. The Fund may concentrate its investments in a particular sector, industry or group of industries from time to time to the extent that the Index concentrates in a sector, industry or group of industries. As of the date of this Prospectus, the Index is concentrated in the group of industries comprising the information technology sector. Under normal circumstances, the Index is reconstituted annually and rebalanced quarterly.
The Fund uses an indexing investment approach to attempt to approximate, before fees and expenses, the investment performance of the Index. The Fund generally will use a replication strategy, which means that the Fund seeks to hold each security found in the Index in approximately the same proportion as represented in the Index itself. There also may be instances in which Harbor Capital Advisors, Inc. (the “Advisor or “Harbor Capital”) may choose to underweight or overweight a security in the Index, purchase securities not in the Index that the Advisor believes are appropriate to substitute for certain securities in the Index or utilize various combinations of other available investment techniques in seeking to replicate as closely as possible, before fees and expenses, the performance of the Index. The Fund may sell securities that are represented in the Index in anticipation of their removal from

10

Fund Summary
Harbor Corporate Culture Leaders ETF
the Index or purchase securities not represented in the Index in anticipation of their addition to the Index. The Fund does not take temporary defensive positions when markets decline or appear overvalued.
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first eight risks) include:
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Equity Risk: The values of equity or equity-related securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Index Tracking Risk: The Fund is not expected to track the performance of the Index at all times with perfect accuracy. The Fund’s return may not track the performance of the Index for a number of reasons. For example, tracking error may occur because of differences between the securities held in the Fund’s portfolio and those included in the Index, pricing differences (including, as applicable, differences between a security’s price at the local market close and the Fund’s valuation of a security at the time of calculation of the Fund’s NAV), transaction costs incurred by the Fund, or the Fund’s holding of uninvested cash, differences in timing of the accrual of or the valuation of dividends or interest. Any transaction costs and market exposure arising from rebalancing the Fund’s portfolio to reflect changes in the composition of the Index will be borne directly by the Fund and its shareholders. The Fund may not be able to invest in certain securities included in the Index or may not be able to invest in them in the exact proportions in which they are represented in the Index, due to legal restrictions, potential adverse tax consequences or other regulatory reasons. The risk that the Fund may not track the performance of the Index may be magnified during times of heightened market volatility or other unusual market conditions. For tax efficiency purposes, the Fund may sell certain securities to realize losses causing it to deviate from the Index.
Index Strategy Risk: The Fund is managed to seek to track, before fees and expenses, the performance of the Index. Therefore, unless a specific security is removed from the Index because it no longer qualifies to be included in the Index, the Fund generally would not sell a security because the security’s issuer is in financial trouble. If a specific security is removed from the Index, it is possible that the Fund may be forced to sell such security at an inopportune time or for prices other than at current market values, which could
have a negative effect on the Fund’s performance.  As a result, the Advisor will not use techniques or defensive strategies designed to lessen the effects of market volatility or to reduce the impact of periods of market decline. Thus, based on market and economic conditions, the Fund’s performance could be lower than funds that actively shift their portfolio assets to take advantage of market opportunities or to lessen the impact of a market decline or a decline in the value of one or more securities.
Index Construction Risk: The Index Provider selects a limited number of companies for the Index based on its proprietary methodology. The theories upon which the Index Provider bases the Index and/or the methodology used in scoring companies for the Index may be inaccurate. The Index Provider relies on third-party data it believes to be reliable in constructing the Index, but it does not guarantee the accuracy or availability of any such third-party data, and there is also no guarantee with respect to the accuracy, availability or timeliness of the production of the Index. The Fund may outperform or underperform other funds that invest in similar asset classes but employ different investment styles. Companies will be excluded from the Index if sufficient data is not available to produce a score, which may result in the exclusion of companies that could otherwise be considered corporate culture leaders. The Index provider’s assessment of a company may differ from that of another investor or investment manager. Errors in the construction or calculation of the Index may occur from time to time and any such errors may not be immediately identified and corrected by Irrational Capital or Solactive, respectively, which may have an adverse impact on the Fund and its shareholders. There is no guarantee that the construction methodology will accurately provide exposure to corporate culture leaders.
Data Risk: The Index Provider relies heavily on information and data provided by third-parties, including the list of high scoring companies provided by Irrational Capital and used to select companies for the Index. Such third-party data includes information derived from survey data. There is no guarantee that survey data will be accurate, complete or representative of a company’s status with respect to its corporate culture. Survey data may be subject to certain biases, including response bias and non-response bias. Furthermore, information derived from survey data may not reflect the most current status of a company, and a company’s financial results may deteriorate prior to a corresponding decline in survey data results. Because the Index is reconstituted only annually, there could be a significant delay before a company’s current status is reflected in the Index. If survey data is unreliable or outdated, the Index may not be successful in providing the specified exposure.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to

11

Fund Summary
Harbor Corporate Culture Leaders ETF
face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Concentration Risk: The Fund’s assets may be concentrated in a particular sector, industry or group of industries to the extent the Index is so concentrated. Concentration of the Fund’s assets in a particular sector, industry or group of industries will subject the Fund to the risk that economic, political or other conditions that have a negative effect on that sector, industry or group of industries will negatively impact the Fund to a greater extent than if the Fund’s assets were concentrated in a wider variety of sectors or industries.
Depositary Receipts Risk: Depositary receipts are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the U.S. or elsewhere. The underlying shares are held in trust by a custodian bank or similar financial institution. The depository bank may not have physical custody of the underlying securities at all times and may charge fees for various services, including forwarding dividends and interest and corporate actions. Depositary receipts are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. Depositary receipts are subject to the risks associated with investing directly in foreign securities.
Information Technology Sector Risk: Companies in the information technology sector can be significantly affected by short product cycles, obsolescence of existing technology, impairment or loss
of intellectual property rights, falling prices and profits, competition from new market entrants, government regulation and other factors.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Large Cap Risk: Large cap stocks may fall out of favor relative to small or mid cap stocks, which may cause the Fund to underperform other equity funds that focus on small or mid cap stocks.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Performance
Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Portfolio Managers
The  portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.
Stephen Cook, Managing Director, ETFs of Harbor Capital, has managed the Fund since 2022.
James Erceg, Executive Vice President and Head of Product at Harbor Capital, has managed the Fund since 2022.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.

12

Fund Summary
Harbor Corporate Culture Leaders ETF
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

13

Harbor Disruptive Innovation ETF
Fund Summary
Investment Objective
The Fund seeks long-term growth of capital.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.75%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.75%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Cost
$77
$240
$417
$930
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. For the period from December 1, 2021 through October 31, 2022, the Fund’s portfolio turnover rate was 71%. Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
Under normal market conditions, the Fund invests primarily in equity securities, principally common stocks, of companies selected based on their potential for growth tied to disruptive innovation. The Fund defines “disruptive innovation” as the development of new products, services, technologies and/or other advancements that could disrupt and displace existing businesses and business models over time. While the Fund invests primarily in securities of U.S. companies, the Fund may invest up to 25% of its assets in foreign securities, including those located in emerging market countries. The Fund invests in securities across the market capitalization spectrum.
The Fund employs a multi-manager approach to achieve its investment objective. The Fund’s investment adviser, Harbor Capital Advisors, Inc. (the “Advisor”) is responsible for selecting and overseeing investment subadvisors (each, a “Subadvisor”) for the Fund. Each Subadvisor is responsible for providing the Advisor with a model portfolio, which the Advisor will implement in its discretion in managing the Fund. Each Subadvisor has its own process for identifying and evaluating companies that, in the Subadvisor’s view, have the potential for growth tied to disruptive innovation. A Subadvisor may recommend selling holdings when it believes that such company’s prospects have deteriorated, future growth is unlikely, or for other reasons that a Subadvisor may identify. The Advisor is responsible for allocating the Fund’s assets among each Subadvisor’s strategy as well as implementing each strategy (which includes buying and selling securities as recommended by each Subadvisor). The Advisor does not expect to independently identify securities for investment for the Fund. The Advisor will determine allocations between each Subadvisor’s strategy and adjust those allocations over time based upon its qualitative and quantitative assessment of each strategy and how those strategies work in combination to produce what the Advisor believes is an enhanced risk-adjusted investment outcome for the Fund.
Holdings are expected to be diversified across sectors, but the Fund may, from time to time, have substantial exposure to a particular sector. Sector allocations are the result of the investment process for the Fund.
The equity securities in which the Fund invests include common stocks as well as preferred securities. The Fund may invest in securities issued by equity real estate investment trusts (REITs). The Fund may also purchase American Depositary Receipts (ADRs), European Depositary Receipts (EDRs), and Global Depositary Receipts (GDRs), which are certificates typically issued by a bank or trust company that represent ownership interests in securities issued by a foreign or domestic company.
The Advisor has selected 4BIO Partners LLP (“4BIO Capital”), NZS Capital, LLC (“NZS Capital”), Sands Capital Management, LLC (“Sands Capital”), Tekne Capital Management, LLC (“Tekne”) and Westfield Capital Management Company, L.P. (“Westfield”) to each serve as a Subadvisor to the Fund.
4BIO Capital recommends securities to the Advisor that reflect 4BIO Capital’s focus on new companies developing emerging technologies to disrupt the advanced therapies space, which includes gene therapy, gene editing, cell therapy, ribonucleic acid (RNA) therapy (treatments that target RNA or deliver it to cells), targeted therapies (cancer treatments targeted at specific genes and proteins) and microbiome (the collection of microorganisms living in or on the human body). 4BIO Capital assesses company valuations with a view toward their future potential value creation and typically recommends divestment either upon the company’s acquisition

14

Fund Summary
Harbor Disruptive Innovation ETF
by another market player or when 4BIO Capital believes that future growth is unlikely.
NZS Capital recommends securities of companies to the Advisor that it believes to be highly adaptable to the disruption presented by the transition of economies from analog to digital. Though many of the companies identified by NZS Capital for investment are in the technology and communication segments of the market, NZS Capital believes that disruption is increasingly impacting all sectors of the economy and may identify companies for investment across sectors.
Sands Capital recommends securities to the Advisor based on Sands Capital’s belief that disruptive innovation improves upon the status quo, whether the innovations are on a large or small scale. Sands Capital identifies companies that it believes to have a leadership position in a promising business space, a significant competitive advantage, a clear mission, a value-add focus, financial strength and a rational valuation relative to the market and their business prospects. Sands Capital uses bottom-up research to identify companies across all sectors that it believes are benefitting from structural changes and secular trends that are distinct from cyclical economic factors.
Tekne recommends securities to the Advisor based on Tekne’s belief that a disruptive innovation company is one that creates, uses or enables technology to change or influence an existing or new workflow, product or service. Tekne seeks to identify investments that it believes will derive success from longer-term growth rather than near-term momentum. Tekne relies on its expertise in the telecommunications, media and technology sectors as well as related industries such as fin-tech.
Westfield recommends securities to the Advisor based on Westfield’s belief that disruptive innovation companies are those providing disruptive products or services to large addressable markets and that maintain a culture of continued innovation as they gain market share. Westfield will primarily focus on U.S. markets with a specialization in technology and health care.
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first six risks) include:
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Disruptive Innovation Risk: Companies that the Subadvisor and/or Advisor, as applicable, believes have the potential for growth tied to disruptive innovation may not in fact be successful. Companies developing new technologies, creating solutions, providing disruptive products or services, or which the Subadvisor and/or Advisor, as applicable, believes to have leadership positions or competitive advantages may not be able to capitalize on those developments or positions. Such companies may encounter competition, regulation or other barriers. These companies may also be exposed to risks applicable to sectors other than the disruptive innovation theme
for which they are chosen, and the securities issued by these companies may underperform the securities of other companies. The Fund may invest in a company that does not currently derive any revenue from disruptive innovations or technologies, and there is no assurance that a company will derive any revenue from disruptive innovations in the future. A disruptive innovation may constitute a small portion of a company’s overall business. As a result, the success of a disruptive innovation may not affect the value of the equity securities issued by the company.
Equity Risk: The values of equity or equity-related securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Multi-Manager Risk: The Subadvisors’ investment styles and security recommendations may not always be complementary, which could affect the performance of the Fund. Moreover, the allocation of Fund assets among Subadvisors may lead the Fund to underperform relative to how it could have performed with a different allocation between Subadvisors.
Non-Discretionary Implementation Risk: Because the Fund is managed pursuant to model portfolios provided by non-discretionary Subadvisors, it is expected that trades will be effected on a periodic basis and therefore less frequently than would typically be the case if discretionary subadvisors were employed. Given that values of investments change with market conditions, this could cause the Fund’s return to be lower than if the Fund employed discretionary subadvisors.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.

15

Fund Summary
Harbor Disruptive Innovation ETF
Depositary Receipts Risk: Depositary receipts are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the U.S. or elsewhere. The underlying shares are held in trust by a custodian bank or similar financial institution. The depository bank may not have physical custody of the underlying securities at all times and may charge fees for various services, including forwarding dividends and interest and corporate actions. Depositary receipts are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. Depositary receipts are subject to the risks associated with investing directly in foreign securities.
Emerging Market Risk: Foreign securities risks are more significant in emerging market countries. These countries may have relatively unstable governments and less-established market economies than developed countries. Emerging markets may face greater social, economic, regulatory and political uncertainties. These risks make emerging market securities more volatile and less liquid than securities issued in more developed countries. Securities exchanges in emerging markets may suspend listed securities from trading for substantially longer periods of time than exchanges in developed markets, including for periods of a year or longer. If the Fund is holding a suspended security, that security would become completely illiquid as the Fund would not be able to dispose of the security until the suspension is lifted. In such instances, it can also be difficult to determine an appropriate valuation for the security because of a lack of trading and uncertainty as to when trading may resume.
Foreign Currency Risk: As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency hedged. In either event, the dollar value of an investment in the Fund would be adversely affected.
Foreign Securities Risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
Growth Style Risk: Over time, a growth oriented investing style may go in and out of favor, which may cause the Fund to underperform other equity funds that use different investing styles.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
REIT Risk: Investing in REITs will subject the Fund to additional risks.  The REITs in which the Fund invests may decline in value as a result of factors affecting the real estate sector, such as changes in real estate values, changes in property taxes and government regulation affecting zoning, land use and rents, changes in interest rates, changes in the cash flow of underlying real estate assets, levels of occupancy, and market conditions, as well as the management skill and creditworthiness of the issuer.  Investments in REITs are also subject to additional risks, including the risk that REITs are unable to generate cash flow to make distributions to unitholders and fail to qualify for favorable tax treatment under the Internal Revenue Code of 1986, as amended.
Sector Risk: Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a mutual fund that invests in a broader range of sectors.
Selection Risk: The Subadvisor’s judgment about the attractiveness of a particular security may be incorrect. The Subadvisor and/or Advisor, as applicable, potentially will be prevented from executing investment decisions at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that the Subadvisor and/or Advisor, as applicable, believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by the Subadvisor and/or Advisor, as applicable, and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
Small and Mid Cap Risk: The Fund’s performance may be more volatile because it may invest in issuers that are smaller companies. Smaller companies may have limited product lines, markets and financial resources. Securities of smaller companies are usually less stable in price and less liquid than those of larger, more established companies. Additionally, small and mid cap stocks

16

Fund Summary
Harbor Disruptive Innovation ETF
may fall out of favor relative to large cap stocks, which may cause the Fund to underperform other equity funds that focus on large cap stocks.
Performance
The following bar chart and tables are intended to help you understand the risks and potential rewards of investing in the Fund. The bar chart shows the performance of the Fund for the period shown. The table shows how the Fund’s average annual total returns compared to the returns of the Fund’s benchmark index, and another comparative index, which include securities with investment characteristics similar to those held by the Fund. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain updated performance information please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Calendar Year Total Returns
During the time periods shown in the bar chart, the Fund’s highest and lowest returns for a calendar quarter were:
 
Total Returns
Quarter/Year
Best Quarter
-2.25%
Q4 2022
Worst Quarter
-30.32%
Q2 2022
Average Annual Total Returns — As of December 31, 2022
 
One
Year
Annualized
Inception
Date
Five
Years
Ten
Years
Since
Inception
Harbor Disruptive Innovation ETF
Before Taxes
-44.91%
N/A
N/A
-42.94%
12/1/2021
After Taxes on
Distributions
-44.91%
N/A
N/A
-42.94%
 
After Taxes on
Distributions and Sale
of Fund Shares
-26.59%
N/A
N/A
-32.53%
 
Comparative Indices
(reflects no deduction for fees, expenses or taxes)
S&P 500
-18.11%
N/A
N/A
-12.44%
 
Russell 3000® Growth
-28.97%
N/A
N/A
-24.41%
 
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Portfolio Managers
The  portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.
Spenser P. Lerner, CFA, Head of Multi-Asset Solutions, Managing Director and Portfolio Manager of Harbor Capital Advisors, Inc., has managed the Fund since 2021.
Kristof Gleich, CFA, President & CIO of Harbor Capital Advisors, Inc., has managed the Fund since 2021.
Subadvisors
The Advisor has engaged 4BIO Capital, NZS Capital, Sands Capital, Tekne and Westfield as subadvisors since 2021 to provide investment management services to the Fund on a non-discretionary basis.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

17

Harbor Dividend Growth Leaders ETF
Fund Summary
Investment Objective
The Fund seeks long-term growth of capital.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.50%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.50%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Cost
$51
$160
$280
$628
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 78%. The portfolio turnover rate shown includes that of the Westfield Capital Dividend Growth Fund (the “Predecessor Fund”). Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
Under normal market conditions, the Fund invests at least 80% of its net assets, plus borrowings for investment purposes, in dividend-paying equity securities. The Fund invests primarily in equity securities, principally common and preferred stocks of large capitalization companies with a history of paying dividends or as determined by the Subadvisor’s analysis, the ability to increase dividends in the future.
The Subadvisor uses a bottom-up process to identify companies which meet the Subadvisor’s fundamental criteria that evaluates companies on earnings, free cash flow generation and return of capital priorities, including dividends and stock buybacks. In constructing the Fund’s portfolio, the Subadvisor seeks to identify companies that it believes possess the following quantitative and qualitative characteristics:
High quality balance sheet;
Good stewards of capital;
Consistent free cash flow generation; and
History of dividend increases.
The Subadvisor then performs a qualitative review of each identified company to select companies for inclusion in the Fund’s portfolio. Such review may include interviews and other contact with company management. The investment process generally results in a portfolio of 30-50 companies and, from time to time, may result in more substantial investments in particular sectors. Sector allocations are the outcome of the Subadvisor’s investment process.
The Fund may also invest in other equity securities, including master limited partnerships (“MLPs”), American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”). The Fund may also invest in foreign securities (including through ADRs and GDRs), with such investments typically representing less than 35% of the Fund’s net assets.
The Subadvisor may sell a security if the security reaches or falls below a predetermined price target, a change in the company’s fundamentals negatively impacts the Subadvisor’s original investment thesis, there is a change in the company’s dividend policy, or the Subadvisor identifies what it believes to be a more attractive investment opportunity.
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first four risks) include:
Dividend Paying Stock Risk: The Fund’s emphasis on dividend-paying stocks involves the risk that such stocks may fall out of favor with investors and underperform the market. Also, a company may reduce or eliminate its dividend.
Equity Risk: The values of equity or equity-related securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within

18

Fund Summary
Harbor Dividend Growth Leaders ETF
an industry. Equity securities generally have greater price volatility than fixed income securities.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Depositary Receipts Risk: Depositary receipts are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the U.S. or elsewhere. The underlying shares are held in trust by a custodian bank or similar financial institution. The depository bank may not have physical custody of the underlying securities at all times and may charge fees for various services,
including forwarding dividends and interest and corporate actions. Depositary receipts are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. Depositary receipts are subject to the risks associated with investing directly in foreign securities.
Foreign Currency Risk: As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency hedged. In either event, the dollar value of an investment in the Fund would be adversely affected.
Foreign Securities Risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Limited Number of Holdings Risk: The Fund may invest in a limited number of companies. As a result, an adverse event affecting a particular company may hurt the Fund’s performance more than if it had invested in a larger number of companies. In addition, the Fund’s performance may be more volatile than a fund that invests in a larger number of companies.
MLP Risk: MLPs are limited partnerships in which the ownership units are publicly traded. MLPs often own several properties or businesses (or own interests) that are related to oil and gas industries or other natural resources, but they also may finance other projects. To the extent that an MLP’s interests are all in a particular industry, the MLP will be negatively impacted by economic events adversely impacting that industry. Additional risks of investing in a MLP also include those involved in investing in a partnership as opposed to a corporation. For example, state law governing partnerships is often less restrictive than state law governing corporations. Accordingly, there may be fewer protections afforded to investors in a MLP than investors in a corporation. For example, investors in MLPs may have limited voting rights or be liable under certain circumstances for amounts greater than the amount of their investment. In addition, MLPs may be subject to state taxation in certain jurisdictions which will have the effect of reducing the amount of income paid by the MLP to its investors.
Preferred Stock Risk: Preferred stocks in which the Fund may invest are sensitive to interest rate changes, and are also subject to equity risk, which is the risk that stock prices will fall over short or extended periods of time. The rights of preferred stocks on the distribution of a company’s assets in the event of a liquidation are generally subordinate to the rights associated with a company’s debt securities.
Sector Risk: Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may

19

Fund Summary
Harbor Dividend Growth Leaders ETF
be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a mutual fund that invests in a broader range of sectors.
Performance
The Fund acquired the assets and assumed the then existing known liabilities of the Predecessor Fund on May 20, 2022 and the Fund is the performance successor of the reorganization. This means that the Predecessor Fund’s performance and financial history will be used by the Fund going forward from the date of reorganization. Accordingly, the performance of the Fund for periods prior to the reorganization is the performance of the Predecessor Fund and the performance shown in the bar chart and performance table for periods prior to July 26, 2013 is the performance of a private investment vehicle that predated the Predecessor Fund. The private investment vehicle was managed by the Subadviser using investment policies, objectives and guidelines that were in all material respects equivalent to the management of the Fund and Predecessor Fund. However, the private investment vehicle was not a registered investment company and so it was not subject to the same investment and tax restrictions as the Fund and Predecessor Fund. If it had been, its performance may have been lower. The performance of the Predecessor Fund has not been restated to reflect the annual operating expenses of the Fund, which are lower than those of the Predecessor Fund. Because the Fund has different fees and expenses than the Predecessor Fund, the Fund would also have had different performance results.
The following bar chart and tables are intended to help you understand the risks and potential rewards of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the Fund’s average annual total returns  compared to the returns of the Fund’s benchmark index, which includes securities with investment characteristics similar to those held by the Fund. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain updated performance information please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Calendar Year Total Returns
During the time periods shown in the bar chart, the Fund’s highest and lowest returns for a calendar quarter were:
 
Total Returns
Quarter/Year
Best Quarter
14.29%
Q4 2021
Worst Quarter
-13.86%
Q4 2018
Average Annual Total Returns — As of December 31, 2022
 
One
Year
Annualized
Inception
Date
Five
Years
Ten
Years
Since
Inception
Harbor Dividend Growth Leaders ETF
Before Taxes
-12.17%
10.54%
11.56%
11.25%
4/30/2010
After Taxes on
Distributions
-13.33%
8.23%
N/A
N/A
 
After Taxes on
Distributions and
Sale of Fund Shares
-6.37%
8.20%
N/A
N/A
 
Comparative Indices
(reflects no deduction for fees, expenses or taxes)
S&P 500
-18.11%
9.42%
12.56%
11.90%
 
NASDAQ Dividend
Achievers Select
Total Return Index
-9.52%
10.45%
12.11%
11.56%
 
After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns will depend on a shareholder’s individual tax situation and may differ from those shown. The after-tax returns shown are not relevant to tax-exempt shareholders or shareholders who hold their Fund shares through a tax-deferred arrangement, such as a 401(k) plan or individual retirement account. In some cases, average annual total return “After Taxes on Distributions and Sale of Fund Shares” may exceed the return “Before Taxes” and/or “After Taxes on Distributions” due to an assumed tax benefit for any losses on a sale of Fund shares at the end of the measurement period. After tax returns cannot be calculated for periods before the Predecessor Fund’s registration as a mutual fund and they are, therefore, unavailable. 

20

Fund Summary
Harbor Dividend Growth Leaders ETF
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
Westfield Capital Management Company, L.P. (“Westfield”) has subadvised the Fund since 2022.
Portfolio Manager
The  portfolio manager is responsible for the day-to-day investment decision making for the Fund.
William A. Muggia
Westfield Capital Management Company, L.P.
Mr. Muggia is the President, Chief Investment Officer, Chief Executive Officer, a Portfolio Manager and Managing Partner of Westfield and has managed the Fund since 2022 and the Predecessor Fund since 2013.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at
a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

21

Harbor Energy Transition Strategy ETF
Fund Summary
Investment Objective
The Fund seeks to provide investment results that correspond, before fees and expenses, to the performance of the Quantix Energy Transition index (the “Index”).
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.80%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1,2
0.00%
Total Annual Fund Operating Expenses
0.80%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund (inclusive of any expenses of a wholly owned subsidiary of the Fund), except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
2Based on estimated amounts for the current fiscal year.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Cost
$82
$255
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. During the most recent fiscal year, the Fund did not have a portfolio turnover rate because the Fund invested only in instruments that are excluded from portfolio turnover rate calculations.
Principal Investment Strategy
The Fund seeks to provide investment results that correspond, before fees and expenses, to the performance of the Index, which was developed by Quantix Commodities Indices LLC (“QCI” or the “Index Provider”), an affiliate of Quantix Commodities LP, the Fund’s subadvisor (“Quantix” or the “Subadvisor”). The Index is composed of futures contracts on physical commodities associated with the accelerating transition from carbon-intensive energy sources, such as petroleum, crude oil and thermal coal, to less carbon-intensive sources of energy, such as natural gas, ethanol, wind power, and solar power. The Index is constructed using QCI’s proprietary quantitative methodology, as described below.
Under normal market conditions, the Index contains at least 10 commodity futures traded on exchanges in the United States (U.S.), Canada, United Kingdom (U.K.) and other European exchanges, determined based upon liquidity and ability to be traded in a cost-efficient manner, as determined by the Index Provider. A commodity futures contract is a legal agreement to buy or sell a particular commodity (for example, metals or agricultural products) at a predetermined price at a specified time in the future. Commodity futures that provide exposure to the energy transition theme are considered component candidates for inclusion in the Index. The commodities that comprise the Index serve one of the three purposes associated with the theme: (1) they are used to construct the new energy infrastructure (for example, copper, aluminum, and silver); (2) they are “bridge fuels” that are less carbon-intensive and will provide energy between now and the net-zero state (for example, natural gas); or (3) they incentivize investment in the new energy infrastructure (for example, carbon credits).
As of the date of this Prospectus, the following commodity futures are eligible for inclusion in the Index: copper, aluminum, nickel, zinc, lead, natural gas (U.S.), natural gas (U.K.), natural gas (Europe), silver, palladium, platinum, soybean oil, ethanol, emissions – European Union Allowances (EUA), and emissions - California Carbon Allowances (CCA).
Commodity futures from the component candidates are selected for the Index and weighted based on the Index Provider’s quantitative methodology, which involves two steps:
Step 1: For each eligible commodity contract, the Index Provider calculates the economic significance weight, or economic importance within the overall universe, based upon level of trading. Specifically, economic significance weight is calculated using a rolling average of the open interest (i.e., the total number of outstanding contracts that have not been settled) in each futures contract relative to the sum of the open interest of the eligible universe, based on information published by the applicable futures exchanges.
Step 2: The Index Provider applies maximum sector weights and maximum and minimum commodity weights to ensure diversification within the Index.
The Index includes provisions for rolling futures contracts as they approach maturity based on a predetermined schedule. “Rolling” means selling a futures contract as it nears its expiration date and replacing it with a new futures contract that has a later expiration date. If the price for the new futures contract is lower than the price of the expiring contract, then the market for the commodity is said to be in “backwardation.” In these markets, roll returns are positive. The term “contango” is used to describe a market in which the price for a new futures contract is higher than the price of the expiring contract. In these markets, roll returns are negative. The Index may include foreign currency denominated

22

Fund Summary
Harbor Energy Transition Strategy ETF
commodity futures contracts. Because the Index is not designed to generate returns from changes in foreign exchange rates, the Index methodology provides for the conversion of futures prices from local currencies into U.S. dollars and hedging the local currency exposure into U.S. dollars.
The Index is calculated on a “total return” basis, meaning that the returns of the futures contracts included in the Index are combined with the returns on cash collateral invested in 13-week U.S. Treasury Bills. Under normal circumstances, the Index is reconstituted monthly. QCI, as provider of the Index, is responsible for Index construction. The Index has been licensed to the Advisor by QCI and is calculated, published and distributed by Solactive AG (“Solactive”), the Index calculation agent. The Subadvisor is responsible for the day-to-day management of the Fund’s assets in accordance with the Fund’s investment objective, subject to the oversight of Harbor Capital Advisors, Inc. (“Harbor Capital” or the “Advisor”).
The Fund seeks to achieve its investment objective primarily by investing, through its Subsidiary (as defined below), in one or more excess return swaps on the Index. Excess return swaps are derivative contracts between two parties who exchange the return from a financial asset between them. The Fund will make payments to a swap dealer counterparty based on a set rate in exchange for payments based on the returns of the futures contracts comprising the Index. If the returns on those futures contracts are positive, the counterparty will pay the Fund; in the event that the returns are negative, the Fund will make payments to the counterparty. The swaps may be terminated by the Subadvisor at any time. The Fund also holds U.S. Treasury securities, cash and/or money market funds, which may be used as collateral for the Fund’s derivatives holdings or to generate interest income and capital appreciation on the cash balances arising from its use of derivatives (thereby providing a “total return” investment in the underlying commodity futures contracts). Under normal circumstances, the Fund invests (directly or through its Subsidiary) at least 80% of its net assets, plus borrowings for investment purposes, in financial instruments and short-term investments that taken together are designed to provide investment results that correspond, before fees and expenses, to the performance of the Index.
The Fund may invest in commodity futures contracts if it at any time it is impractical or inefficient to gain full or partial exposure to a commodity through the use of excess return swaps, including on a different commodity (including commodities not included in the Index) that the Subadvisor believes will help the Fund achieve its investment objective.
Although the Index applies certain maximum sector and commodity weights, a significant portion of the Index may consist of a particular sector or commodity. In such instances, the Fund is expected to have significant exposure to that sector or commodity. As of the date of this Prospectus, a significant portion of the Index consists of, and therefore the Fund has significant exposure to, the base metals and natural gas sectors. Base metals, such as copper, aluminum, zinc, and lead, are common metals used in industry or manufacturing excluding iron-containing metals and alloys or precious metals, such as gold or silver.
The Fund will invest up to 25% of its total assets, as determined at the end of each fiscal quarter, in a wholly owned and controlled subsidiary (the “Subsidiary”) organized under the laws of the Cayman Islands. The Fund’s investment in the Subsidiary is expected to provide the Fund with exposure to commodity returns within the limits of the federal tax laws, which limit the ability of investment companies such as the Fund to invest directly in such instruments. The Subsidiary has the same investment objective and will follow
the same general investment policies and restrictions as the Fund. Unlike the Fund, the Subsidiary may invest without limitation in commodity-linked derivative instruments. The Subsidiary’s investment in derivative instruments, including excess return swaps, may have a leveraging effect on the Fund because of the leverage inherent in the use of derivatives. Except as noted, references to the Fund’s investment strategies and risks include those of its Subsidiary. The Subsidiary is advised by the Advisor and subadvised by the Subadvisor.
The Fund is classified as non-diversified, which means the Fund may invest in the securities of a smaller number of issuers than a diversified fund.
Principal Risks
Investors considering an investment in the Fund should be prepared to accept significant volatility in the Fund’s performance, particularly over shorter time periods. The Fund is not intended to serve as a core holding in an investor’s portfolio but instead should represent only a small portion of an investor’s overall diversified portfolio. Investors considering an investment in this Fund should be sure they carefully read and understand the investment strategies employed and the heightened risks associated with those strategies.
There is no guarantee that the investment objective of the Fund will be achieved. Commodities and commodity-linked derivative instruments can be significantly more volatile than other securities, such as stocks or bonds. Similarly, the Index can be significantly more volatile than broad market equity and fixed income indices. The value of your investment in the Fund may go down, which means that you could lose money on your investment in the Fund or the Fund may not perform as well as other possible investments. Principal risks impacting the Fund (in alphabetical order after the first nine) include:
Commodity Risk: The Fund has exposure to commodities through its and/or the Subsidiary’s investments in commodity-linked derivative instruments. Commodity prices are generally affected by, among other factors, the cost of producing, transporting and storing commodities, changes in consumer or commercial demand for commodities, the hedging and trading strategies of producers and consumers of commodities, speculative trading in commodities by commodity pools and other market participants, disruptions in commodity supply, weather, political and other global events, global economic factors and government intervention in or regulation of the commodity or commodity futures markets. The Fund may concentrate its assets in a particular sector of the commodities market (such as oil, metal or agricultural products) in order to seek to track the Index. As a result, the Fund may be more susceptible to risks associated with those sectors.
Excess Return Swaps Risk: Excess return swaps could result in losses if the underlying asset or reference does not perform as anticipated. Excess return swaps can have the potential for unlimited losses. They are also subject to counterparty risk. If the counterparty fails to meet its obligations, the Fund may lose money.
Index Construction Risk: QCI selects a limited number of commodity futures contracts for the Index based on its proprietary methodology. The theories and assumptions upon which QCI bases the Index and/or the methodology used in constructing the Index may be inaccurate. The Fund may outperform or underperform other funds that invest in similar asset classes but employ different investment styles. QCI’s assessment of a commodity and/or futures contract may differ from that of another investor or investment manager. Errors in the construction or calculation of the Index may occur from time to time and any such errors may not be immediately identified and corrected by QCI or Solactive,

23

Fund Summary
Harbor Energy Transition Strategy ETF
respectively, which may have an adverse impact on the Fund and its shareholders. There is no guarantee that the construction methodology will accurately provide the intended exposure. The Index methodology may result in omission of commodities that are otherwise relevant to the energy transition theme because such commodities do not have futures markets or have futures markets that are illiquid.  In addition, the supply and demand dynamics of commodities included in the Index may be influenced by various factors unrelated to the Index’s energy transition theme.
Sector Risk: To the extent that the Fund has significant exposure to a particular sector or commodity, the Fund will be subject to the risk that economic, political or other conditions that have a negative effect on that sector or commodity will negatively impact the Fund to a greater extent than if the Fund’s assets were invested in a wider variety of sectors or commodities.
Index Tracking Risk: The Fund is not expected to track the performance of the Index at all times with perfect accuracy. The Fund’s return may not track the performance of the Index for a number of reasons. For example, tracking error may occur because of differences between the securities and other financial instruments held in the Fund’s portfolio and those included in the Index, pricing differences (including, as applicable, differences between a security’s price at the local market close and the Fund’s valuation of a security at the time of calculation of the Fund’s NAV), transaction costs incurred by the Fund, or the Fund’s holding of uninvested cash, differences in timing of the accrual of or the valuation of dividends or interest. Any transaction costs and market exposure arising from rebalancing the Fund’s portfolio to reflect changes in the composition of the Index will be borne directly by the Fund and its shareholders. The Fund may not be able to invest in certain securities included in the Index or may not be able to invest in them in the exact proportions in which they are represented in the Index, due to legal restrictions, potential adverse tax consequences or other regulatory reasons. The risk that the Fund may not track the performance of the Index may be magnified during times of heightened market volatility or other unusual market conditions. For tax efficiency purposes, the Fund may sell certain securities to realize losses causing it to deviate from the Index.
Index Strategy Risk: The Fund is managed to seek to track, before fees and expenses, the performance of the Index. Therefore, unless a specific security is removed from the Index because it no longer qualifies to be included in the Index, the Fund generally would not sell a security because the security’s issuer is in financial trouble. If a specific security is removed from the Index, it is possible that the Fund may be forced to sell such security at an inopportune time or for prices other than at current market values, which could have a negative effect on the Fund’s performance.  As a result, the Advisor will not use techniques or defensive strategies designed to lessen the effects of market volatility or to reduce the impact of periods of market decline. Thus, based on market and economic conditions, the Fund’s performance could be lower than funds that actively shift their portfolio assets to take advantage of market opportunities or to lessen the impact of a market decline or a decline in the value of one or more securities.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an
agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Energy Transition Risk: The commodities included in the Index may become less representative of energy transition trends over time depending upon industry trends, global market conditions, demand constraints, and technological advancements in energy production and renewable energy sources. The Fund’s investments may be significantly impacted by government and corporate policies related to the use of renewable energy technologies, such as electric vehicles, and power sources, such as solar, wind and hydrogen. These investments may also be negatively impacted by the policies and practices of governments, intergovernmental organizations, or corporations that promote or benefit fossil-based systems of energy production; reduced availability of renewable energy sources; slowdowns in new construction; seasonal weather conditions, extreme weather or other natural disasters; and threats of attack by terrorists on renewable energy assets.
Base Metals Risk: The price of base metals, such as copper, aluminum, nickel, zinc, and lead, can be impacted by overall market movements, changes in interest rates, energy and commodity prices, the global supply and demand for metals, factors that impact metal production, technological advances in the processing and mining of metals, and changes in economic and/or political conditions that may impact the price of metals and metals futures contracts.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash

24

Fund Summary
Harbor Energy Transition Strategy ETF
needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Commodity-Linked Derivatives Risk: The Fund’s investments in commodity-linked derivative instruments (either directly or through the Subsidiary) and the tracking of an Index comprised of commodity futures may subject the Fund to significantly greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by prevailing spot prices for the underlying commodity, supply and demand, market activity, liquidity, economic, financial, political regulatory, geographical, biological or judicial events, and the general interest rate environment. Commodity-linked derivatives are subject to the risk that the counterparty to the transaction, the exchange or trading facility on which they trade, or the applicable clearing house may default or otherwise fail to perform. If all or a significant portion of the futures contracts reflected in the Index were to reach a negative price, you could lose your entire investment. Each trading facility on which the derivatives are traded has the right to suspend or limit trading in the instruments that it lists. Certain of the futures contracts in which the Fund may invest trade on non-U.S. exchanges that impose different requirements than U.S. exchanges. These futures contracts may be subject to additional risks, including greater price volatility, temporary price aberrations and the potential imposition of limits that constrain appreciation or cause depreciation of the prices of such futures contracts, as well as different and longer settlement periods. The Fund will incur certain costs as a result of its use of derivatives. The Fund’s use of commodity-linked derivatives may also have a leveraging effect on the Fund’s portfolio. Leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the Fund otherwise would have had. The Fund is required to post margin in respect to certain of its holdings in derivatives.
Counterparty Risk: A counterparty may be unwilling or unable to meet its contractual obligations. If the counterparty or its affiliate becomes insolvent, bankrupt or defaults ion its payment obligations to the Fund, the value of an investment held by the Fund may decline. The Fund may also not be able to exercise remedies, such as the termination of transactions, netting of obligations and realization on collateral if such remedies are stayed or eliminated under special resolutions adopted in the United States or other jurisdictions.
In addition, the Fund may enter into swap agreements with a limited number of counterparties, which may increase the Fund’s exposure to counterparty credit risk. Counterparties may be less willing to enter into transactions in stressed or volatile market conditions or may alter the terms they are willing to accept in such conditions. Further, there is a risk that no suitable counterparties will be willing to enter into, or continue to enter into, transactions with the Fund, which may cause the Fund not to be able to achieve its investment objective or to change its investment objective.
Energy Sector Risk: The performance of energy-related commodities, including petroleum, is generally cyclical and highly dependent on energy prices. The market value of energy-related commodities may decline for many reasons, including, among others: changes in energy prices, exploration and production spending, and energy supply and demand; global political changes; terrorism, natural disasters and other catastrophes; changes in exchange rates; and government regulations, taxation policies, and energy conservation efforts. The energy sector has recently
experienced increased volatility. In particular, significant market volatility in the crude oil markets as well as the oil futures markets resulted in the market price of the front month WTI crude oil futures contract falling below zero for a period of time.
Emissions-Related Credits Risk: The Fund’s performance may be more volatile as a result of its investments in emissions-related credits. Emissions-related credit prices may be affected by any number of factors, including, among others: technology; climate change, natural disasters and other catastrophes; changes in exchange rates; global political changes, and government regulations.
Foreign Currency Risk: Because the Index may include futures contracts denominated in foreign currencies, the Fund could be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency hedged. In either event, the dollar value of an investment in the Fund would be adversely affected. Although the Index methodology provides for hedging of foreign currency exposure, there is no guarantee that such hedging will be successful.
Geopolitical Risk: Geopolitical events may disrupt securities and commodity markets and adversely affect global economies. War, terrorism, sanctions, and related geopolitical events have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on U.S. and world economies and markets generally. Recent geopolitical events have led and are expected to continue to lead to instability in certain of the markets in which the Fund invests. During global market disruptions, the Fund’s exposure to the other risks described in this Prospectus will likely increase. Market disruptions can also prevent the Fund from implementing its investment strategies for a period of time and achieving its investment objective. For example, a market disruption may adversely affect the orderly functioning of the securities or commodity markets and may cause the Fund’s derivatives counterparties to discontinue offering derivatives on some underlying securities, reference rates, or indices, or to offer them on a more limited basis.
Interest Rate Risk: As interest rates rise, the values of fixed income securities held by the Fund are likely to decrease and reduce the value of the Fund’s portfolio. Securities with longer durations tend to be more sensitive to changes in interest rates and are usually more volatile than securities with shorter durations. For example, a 5 year average duration generally means the price of a fixed income security will decrease in value by 5% if interest rates rise by 1%. Rising interest rates may lead to increased redemptions, increased volatility and decreased liquidity in the fixed income markets, making it more difficult for the Fund to sell its fixed income securities when the Subadvisor may wish to sell or must sell to meet redemptions. During periods when interest rates are low or there are negative interest rates, the Fund’s yield (and total return) also may be low or the Fund may be unable to maintain positive returns or minimize the volatility of the Fund’s net asset value per share. Changing interest rates may have unpredictable effects on the markets, may result in heightened market volatility and may detract from Fund performance. In addition, changes in monetary policy may exacerbate the risks associated with changing interest rates.
Investment in Other Investment Companies Risk: Investments in other investment companies (including money market funds) are subject to market and selection risk. In addition, if the Fund acquires shares of investment companies, shareholders bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the investment companies.

25

Fund Summary
Harbor Energy Transition Strategy ETF
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
New Index Risk: The Index was created by and is owned and maintained by the Index Provider, and it has not previously been utilized for a registered fund, which may create additional risks for investing in the Fund. There can be no guarantee that the Index will operate as intended during volatile market conditions or over the course of a full market cycle.
Non-Diversification Risk: Because the Fund is non-diversified and may invest a greater percentage of its assets in securities of a single issuer, and/or invest in a relatively small number of issuers, it is more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio.
Subsidiary Risk: By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. The derivatives and other investments held by the Subsidiary generally are similar to those that are permitted to be held by the Fund and are subject to the same risks that apply to similar investments if held directly by the Fund. The Subsidiary is not registered under the Investment Company Act of 1940 (the “Investment Company Act”), and, unless otherwise noted in this prospectus, is not subject to all of the investor protections of the Investment Company Act. In addition, changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as described in this Prospectus and the Statement of Additional Information and could adversely affect the Fund.
Tax Risk: The ability of the Fund to gain commodity exposure as contemplated may be adversely affected by future legislation, regulatory developments, interpretive guidance or other actions by the Internal Revenue Service (“IRS”) or the Treasury Department
U.S. Treasury Obligations Risk: U.S. Treasury obligations may differ from other securities in their interest rates, maturities, times of issuance and other characteristics. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s exposure to U.S. Treasury obligations to decline.
Performance
Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
Quantix Commodities LP (“Quantix”) has subadvised the Fund since 2022.
Portfolio Manager
The  portfolio manager is responsible for the day-to-day investment decision making for the Fund.
(MATTHEW SCHWAB PHOTO)
Matthew Schwab
Quantix Commodities LP
Mr. Schwab is a Portfolio Manager at Quantix and has served as a portfolio manager for the Fund since February 2022.

26

Fund Summary
Harbor Energy Transition Strategy ETF
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

27

Harbor Health Care ETF
Fund Summary
Investment Objective
The Fund seeks long-term growth of capital.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.80%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1,2
0.00%
Total Annual Fund Operating Expenses
0.80%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
2Based on estimated amounts for the current fiscal year.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Cost
$82
$255
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. No portfolio turnover rate exists for the Fund, which commenced operations on November 16, 2022.
Principal Investment Strategy
The Fund invests primarily in equity securities, principally common and preferred stocks of companies of any market capitalization. Under normal market conditions, the Fund invests at least 80% of its net assets, plus borrowings for investment purposes, in securities of companies principally engaged in the research, development, production, or distribution of products and services related to the health care industry (“health care companies”). Health care companies may include, for example, manufacturers of health care equipment and supplies, health care services providers, pharmaceutical companies, biotechnology and life sciences companies, and suppliers of technologies for use by health care companies. The Fund may invest in issuers of all market capitalizations, including larger, established issuers and newer companies with little or no current revenues. The Fund may invest in foreign securities (including through investment in depositary receipts), with such investments typically representing less than 35% of the Fund’s net assets.
Westfield Capital Management, Company, L.P. (“Westfield” or the “Subadvisor”), the Fund’s subadvisor, uses a bottom-up process to identify primarily U.S. listed health care companies that meet the Subadvisor’s strict fundamental criteria and then performs a qualitative review on each identified company to select approximately 30 to 50 companies for inclusion in the Fund’s portfolio. The Subadvisor considers a number of factors in the course of its fundamental research, including but not limited to valuation, competitive advantage, market opportunity, financial metrics, capital structure, and management track record of execution. The Subadvisor’s research may include personal interviews and other contact with company management.
In constructing the Fund’s portfolio, the Subadvisor seeks to identify health care companies that it believes possess the following characteristics:
Superior company management;
Significant insider ownership;
Unique market positions and broad market opportunities; and
Solid financial controls and accounting processes.
The Subadvisor may sell a security if the security reaches or falls below a predetermined price target, a change in the company’s fundamentals negatively impacts the Subadvisor’s original investment thesis, or the Subadvisor identifies what it believes to be a more attractive investment opportunity.
The Fund is classified as non-diversified, which means the Fund may invest in the securities of a smaller number of issuers than a diversified fund.
The Fund concentrates its investments (i.e., holds more than 25% of its total assets) in the securities of issuers in the health care industry or group of industries.

28

Fund Summary
Harbor Health Care ETF
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first six risks) include:
Health Care Industry Risk: Because the Fund seeks to invest all, or substantially all, of its assets in the health care industry, the value of its shares will depend on the general condition of the that industry. The health care industry may be affected by any number of factors, including, but not limited to, lapsing patent protection, industry innovation, extensive government regulation, restrictions on government reimbursement for medical expenses, research and development costs, limited product lines, product liability litigation, an increased emphasis on outpatient services, and competitive forces.
Non-Diversification Risk: Because the Fund is non-diversified and may invest a greater percentage of its assets in securities of a single issuer, and/or invest in a relatively small number of issuers, it is more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio.
Equity Risk: The values of equity or equity-related securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs
have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Foreign Currency Risk: As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency hedged. In either event, the dollar value of an investment in the Fund would be adversely affected.
Foreign Securities Risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.

29

Fund Summary
Harbor Health Care ETF
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Preferred Stock Risk: Preferred stocks in which the Fund may invest are sensitive to interest rate changes, and are also subject to equity risk, which is the risk that stock prices will fall over short or extended periods of time. The rights of preferred stocks on the distribution of a company’s assets in the event of a liquidation are generally subordinate to the rights associated with a company’s debt securities.
Selection Risk: The Subadvisor’s judgment about the attractiveness of a particular security may be incorrect. The Subadvisor and/or Advisor, as applicable, potentially will be prevented from executing investment decisions at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that the Subadvisor and/or Advisor, as applicable, believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by the Subadvisor and/or Advisor, as applicable, and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
Small and Mid Cap Risk: The Fund’s performance may be more volatile because it may invest in issuers that are smaller companies. Smaller companies may have limited product lines, markets and financial resources. Securities of smaller companies are usually less stable in price and less liquid than those of larger, more established companies. Additionally, small and mid cap stocks may fall out of favor relative to large cap stocks, which may cause the Fund to underperform other equity funds that focus on large cap stocks.
Performance
Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
Westfield has subadvised the Fund since 2022.
Portfolio Managers
The  portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.
William A. Muggia
Westfield Capital Management Company, L.P.
Mr. Muggia is the President, Chief Investment Officer, Chief Executive Officer, a Portfolio Manager and Managing Partner of Westfield and has co-managed the Fund since 2022.
(MATTHEW RENNA PHOTO)
Matthew R. Renna
Westfield Capital Management Company, L.P.
Mr. Renna is a Partner, Head of the Health Care Sector Team, and a Portfolio Manager of Westfield and has co-managed the Fund since 2022.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

30

Harbor International Compounders ETF
Fund Summary
Investment Objective
The Fund seeks long-term growth of capital.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.55%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1,2
0.00%
Total Annual Fund Operating Expenses
0.55%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
2Based on estimated amounts for the current fiscal year.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Cost
$56
$176
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. For the period from September 7, 2022 through October 31, 2022, the Fund’s portfolio turnover rate was 1%. Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
The Fund invests primarily in equity securities of non-U.S. companies, including those located in emerging market countries. The Fund invests principally in the common stock of companies with market capitalizations of at least $5 billion at the time of acquisition that are identified as “compounders” by C WorldWide Asset Management Fondsmaeglerselskab A/S, the Fund’s subadvisor (the “Subadvisor”). A company is considered a “compounder” if, in the Subadvisor’s view, it is expected to experience sustainable growth and compound its earnings over the long-term (generally five years or more).
In seeking to identify companies for the Fund’s portfolio, the Subadvisor conducts qualitative assessments of companies, including, among other criteria, each company’s business model, management, and financial and valuation metrics. The Subadvisor seeks to identify what it believes to be high-quality companies with consistent, recurring revenues, stable free cash flows and sustainable returns on invested capital. The Subadvisor aims to construct a portfolio of companies exposed to diverse structural growth themes. The investment process generally results in a portfolio of 25-30 companies and, from time to time, may result in more substantial investments in particular countries, regions or sectors. Country, region and sector allocations are the outcome of the Subadvisor’s stock selection process.
The Subadvisor’s assessment of a company’s business practices includes a consideration of environmental, social and governance (“ESG”) factors. In incorporating ESG factors into its investment process, the Subadvisor seeks to identify sustainable growth companies that follow good business practices. In the Subadvisor’s view, these are companies with strong corporate governance practices and ethics, laying the foundation for a sustainable business model. The Subadvisor’s assessment is based on its internal research as well as third-party data. The key ESG considerations may vary depending on the industry, sector, geographic region or other factors and the business of each issuer.
The Subadvisor’s approach to portfolio selection is based on fundamental research informed by visiting companies, participating in investment workshops and seminars, generating proprietary research and reviewing third-party research. The Subadvisor’s fundamental evaluation of stocks is dependent on a combination of factors, including risk return considerations, market sentiment and economic data.
The Fund may also invest in depositary receipts. The Fund may invest in foreign currencies and may engage in other foreign currency transactions for investment or hedging purposes.
The Fund is classified as non-diversified, which means the Fund may invest in the securities of a smaller number of issuers than a diversified fund.
The Subadvisor maintains a long-term investment horizon. The Subadvisor monitors investments for changes in the factors above, which may trigger a decision to sell a security, but does not require such a decision. The Subadvisor also may consider selling a security if the Subadvisor develops alternative investment ideas or in order to meet redemption requests.

31

Fund Summary
Harbor International Compounders ETF
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first seven risks) include:
Foreign Securities Risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
Non-Diversification Risk: Because the Fund is non-diversified and may invest a greater percentage of its assets in securities of a single issuer, and/or invest in a relatively small number of issuers, it is more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio.
Limited Number of Holdings Risk: The Fund may invest in a limited number of companies. As a result, an adverse event affecting a particular company may hurt the Fund’s performance more than if it had invested in a larger number of companies. In addition, the Fund’s performance may be more volatile than a fund that invests in a larger number of companies.
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Equity Risk: The values of equity or equity-related securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading
individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Depositary Receipts Risk: Depositary receipts are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the U.S. or elsewhere. The underlying shares are held in trust by a custodian bank or similar financial institution. The depository bank may not have physical custody of the underlying securities at all times and may charge fees for various services, including forwarding dividends and interest and corporate actions. Depositary receipts are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. Depositary receipts are subject to the risks associated with investing directly in foreign securities.
Emerging Market Risk: Foreign securities risks are more significant in emerging market countries. These countries may have relatively unstable governments and less-established market economies than developed countries. Emerging markets may face greater social, economic, regulatory and political uncertainties. These risks make

32

Fund Summary
Harbor International Compounders ETF
emerging market securities more volatile and less liquid than securities issued in more developed countries. Each applicable Subadvisor generally considers an instrument to be economically tied to an emerging market country if: the issuer is organized under the laws of an emerging market country; the currency of settlement of the security is a currency of an emerging market country; the security is guaranteed by the government of an emerging market country (or any political subdivision, agency, authority or instrumentality of such government); for an asset-backed or other collateralized security, the country in which the collateral backing the security is located is an emerging market country; or the security’s “country of exposure” is an emerging market country, as determined by the criteria set forth below. With respect to derivative instruments, the Subadvisor generally considers such instruments to be economically tied to emerging market countries if the underlying assets are currencies of emerging market countries (or baskets or indexes of such currencies), or instruments or securities that are issued or guaranteed by governments of emerging market countries or by entities organized under the laws of emerging market countries or if an instrument’s “country of exposure” is an emerging market country. A security’s “country of exposure” is determined by the Subadvisor using certain factors provided by a third-party analytical service provider. The Advisor and/or Subadvisor have broad discretion to identify countries that it considers to qualify as emerging markets. Emerging market countries are generally located in Asia, Africa, the Middle East, Latin America and Eastern Europe. Securities exchanges in emerging markets may suspend listed securities from trading for substantially longer periods of time than exchanges in developed markets, including for periods of a year or longer. If the Fund is holding a suspended security, that security would become completely illiquid as the Fund would not be able to dispose of the security until the suspension is lifted. In such instances, it can also be difficult to determine an appropriate valuation for the security because of a lack of trading and uncertainty as to when trading may resume.
ESG Factors Risk: The consideration of ESG factors by the Subadvisor and/or Advisor, as applicable, could cause the Fund to perform differently than other funds. ESG factors are not the only consideration used by the Subadvisor and/or Advisor, as applicable, in making investment decisions for the Fund and the Fund may invest in a company that scores poorly on ESG factors if it scores well on other criteria. ESG factors may not be considered for every investment decision.
Foreign Currency Risk: As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency hedged. In either event, the dollar value of an investment in the Fund would be adversely affected.
Geographic Focus Risk: The Fund may invest a substantial amount of its assets in securities of issuers located in a single country or geographic region. As a result, any changes to the regulatory, political, social or economic conditions in such country or geographic region will generally have greater impact on the Fund than such changes would have on a more geographically diversified fund and may result in increased volatility and greater losses.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case
the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Participatory Notes Risk: The return on a P-note is linked to the performance of the issuers of the underlying securities. The performance of P-notes will not replicate exactly the performance of the issuers that they seek to replicate due to transaction costs and other expenses.  P-notes are subject to counterparty risk since the notes constitute general unsecured contractual obligations of the financial institutions issuing the notes, and the Fund is relying on the creditworthiness of such institutions and has no rights under the notes against the issuers of the underlying securities.  P-notes may also be less liquid and more difficult to sell.
Sector Risk: Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a mutual fund that invests in a broader range of sectors.
Selection Risk: The Subadvisor’s judgment about the attractiveness of a particular security may be incorrect. The Subadvisor and/or Advisor, as applicable, potentially will be prevented from executing investment decisions at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that the Subadvisor and/or Advisor, as applicable, believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by the Subadvisor and/or Advisor, as applicable, and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
Performance
Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.

33

Fund Summary
Harbor International Compounders ETF
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
C WorldWide Asset Management Fondsmaeglerselskab A/S (“C WorldWide”) has subadvised the Fund since 2022.
Portfolio Managers
The  portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.
(Bo Knudsen photo)
Bo Almar Knudsen
C WorldWide Asset Management
Fondsmaeglerselskab A/S
Mr. Knudsen is the Chief Executive Officer and Portfolio Manager of C WorldWide and has co-managed the Fund since 2022.
(Bengt Seger photo)
Bengt Seger
C WorldWide Asset Management
Fondsmaeglerselskab A/S
Mr. Seger is a Portfolio Manager of C WorldWide and has co-managed the Fund since 2022.
(Peter O’Reilly photo)
Peter O’Reilly
C WorldWide Asset Management
Fondsmaeglerselskab A/S
Mr. O’Reilly is a Portfolio Manager of C WorldWide and has co-managed the Fund since 2022.
(Mattias Kolm photo)
Mattias Kolm
C WorldWide Asset Management
Fondsmaeglerselskab A/S
Mr. Kolm is a Portfolio Manager of C WorldWide and has co-managed the Fund since 2022.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

34

Harbor Long-Term Growers ETF
Fund Summary
Investment Objective
The Fund seeks long-term growth of capital.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.57%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.57%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Cost
$58
$183
$318
$714
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. For the period from February 2, 2022 through October 31, 2022, the Fund’s portfolio turnover rate was 24%. Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
The Fund invests primarily in equity securities, principally common and preferred stocks, of U.S. companies that the Subadvisor believes to have above-average prospects for long-term growth. The Fund is “non-diversified,” meaning that a relatively high percentage of its assets may be invested in a limited number of issuers.
The Subadvisor selects investments for the Fund using a proprietary combination of bottom-up, fundamental research and systematic portfolio construction, in order to build a portfolio of high-conviction stocks reflecting the views of the Subadvisor.
The Subadvisor’s fundamental, bottom-up research seeks to identify mid- and large-capitalization companies it believes will have magnitude and duration of growth that is above that of the public equity market, as determined by the Subadvisor. The research includes visits to companies and discussion with company management.
These companies typically possess a combination of the following characteristics:
Market-leading position in core business areas;
Disruptive business model;
Expected above average revenue, earnings, and cash flow growth over the next several years;
Strong cash flow generation and reinvestment;
Balance sheet strength;
Experienced management team, able to execute on the business opportunity; and
Appropriate valuations relative to the company’s long-term growth potential.
The Subadvisor then employs a systematic portfolio construction process that seeks to manage overall investment risk exposures and characteristics in order to maintain consistency with the Fund’s objective. The Subadvisor uses a portfolio optimization process designed to incorporate the Subadvisor’s fundamental growth insights, considering diversification and liquidity risk.
As part of its investment process, the Subadviser considers environmental, social and governance (“ESG”) factors that it believes may have a material impact on an issuer and the value of its securities. As a result, the key ESG considerations may vary depending on the industry, sector, geographic region or other factors and the core business of each issuer.
The Fund may invest up to 20% of its total assets in the securities of foreign issuers, including issuers located or doing business in emerging markets.

35

Fund Summary
Harbor Long-Term Growers ETF
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first six risks) include:
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Non-Diversification Risk: Because the Fund is non-diversified and may invest a greater percentage of its assets in securities of a single issuer, and/or invest in a relatively small number of issuers, it is more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio.
Equity Risk: The values of equity or equity-related securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Growth Style Risk: Over time, a growth oriented investing style may go in and out of favor, which may cause the Fund to underperform other equity funds that use different investing styles.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Depositary Receipts Risk: Depositary receipts are certificates evidencing ownership of shares of a foreign issuer. These certificates are issued by depository banks and generally trade on an established market in the U.S. or elsewhere. The underlying shares are held in trust by a custodian bank or similar financial institution. The depository bank may not have physical custody of the underlying securities at all times and may charge fees for various services, including forwarding dividends and interest and corporate actions. Depositary receipts are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. Depositary receipts are subject to the risks associated with investing directly in foreign securities.
ESG Factors Risk: The consideration of ESG factors by the Subadvisor and/or Advisor, as applicable, could cause the Fund to perform differently than other funds. ESG factors are not the only consideration used by the Subadvisor and/or Advisor, as applicable, in making investment decisions for the Fund and the Fund may invest in a company that scores poorly on ESG factors if it scores well on other criteria. ESG factors may not be considered for every investment decision.
Foreign Securities Risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Large Cap Risk: Large cap stocks may fall out of favor relative to small or mid cap stocks, which may cause the Fund to underperform other equity funds that focus on small or mid cap stocks.

36

Fund Summary
Harbor Long-Term Growers ETF
Mid Cap Risk: The Fund’s performance may be more volatile because it invests primarily in mid cap stocks. Mid cap companies may have limited product lines, markets and financial resources. Securities of mid cap companies are usually less stable in price and less liquid than those of larger, more established companies. Additionally, mid cap stocks may fall out of favor relative to small or large cap stocks, which may cause the Fund to underperform other equity funds that focus on small or large cap stocks.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Preferred Stock Risk: Preferred stocks in which the Fund may invest are sensitive to interest rate changes, and are also subject to equity risk, which is the risk that stock prices will fall over short or extended periods of time. The rights of preferred stocks on the distribution of a company’s assets in the event of a liquidation are generally subordinate to the rights associated with a company’s debt securities.
Sector Risk: Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a mutual fund that invests in a broader range of sectors.
Selection Risk: The Subadvisor’s judgment about the attractiveness of a particular security may be incorrect. The Subadvisor and/or Advisor, as applicable, potentially will be prevented from executing investment decisions at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that the Subadvisor and/or Advisor, as applicable, believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by the Subadvisor and/or Advisor, as applicable, and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
Performance
Because the Fund is newly organized and does not yet have a complete calendar year of performance history, the bar chart and total return tables are not provided. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain performance information, please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
Jennison Associates LLC (“Jennison”) has subadvised the Fund since 2022.
Portfolio Managers
The  portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.
Blair A. Boyer
Jennison Associates LLC
Mr. Boyer is a Managing Director and the Co-Head of Large Cap Growth Equity of Jennison and has co-managed the Fund since 2022.
Natasha Kuhlkin, CFA
Jennison Associates LLC
Ms. Kuhlkin is a Managing Director and a Large Cap Growth Equity Portfolio Manager of Jennison and has co-managed the Fund since 2022.
Kathleen A. McCarragher
Jennison Associates LLC
Ms. McCarragher is a Director, Managing Director and the Head of Growth Equity of Jennison and has co-managed the Fund since 2022.
Jason T. McManus
Jennison Associates LLC
Mr. McManus is a Managing Director and the Head of Custom Solutions of Jennison and has co-managed the Fund since 2022.

37

Fund Summary
Harbor Long-Term Growers ETF
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

38

Harbor Scientific Alpha High-Yield ETF
Fund Summary
Investment Objective
The Fund seeks total return.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.48%
Distribution and Service (12b-1) Fees
None
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.48%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Cost
$49
$154
$269
$604
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 114%. Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
Under normal market conditions, the Fund invests at least 80% of its net assets, plus borrowings for investment purposes, in a portfolio of below investment-grade corporate bonds, commonly referred to as “high yield” or “junk” bonds, or unrated securities that BlueCove Limited (the “Subadvisor”) considers to be of an equivalent credit quality, which may be represented by derivative instruments, including futures and swaps. The Subadvisor determines whether a bond is rated below investment grade using a composite rating calculated by assigning a numerical value to those ratings of Moody’s, S&P and Fitch which are available for the bond and averaging those amounts to determine the rating. The Fund invests primarily in U.S. dollar denominated securities, including those of foreign issuers. Derivative instruments in which the Fund may invest include credit-default swaps and U.S. Treasury futures. The Fund may also invest in exchange-traded funds to manage aggregate portfolio exposures.
The Subadvisor defines scientific alpha as the investment returns generated from following a structured investment process based on the testing of investment hypotheses using historical data. The Subadvisor’s portfolio management team retains discretion with respect to all investment decisions.
The Subadvisor’s investment process utilizes proprietary quantitative models to produce investment recommendations. The Subadvisor generates proprietary insights based on its experience and reasoned intuition to form an investment hypothesis. Using historical market data, the Subadvisor back-tests each investment hypothesis to determine whether actual observations appear consistent with the hypothesis over time. The Subadvisor’s back-testing process involves the development of research parameters, internal peer review, and consideration of a wide range of analyses. Insights are weighted in the Subadvisor’s models according to their deemed strength in predicting returns, as determined by the Subadvisor through this testing process. In managing the Fund, the Subadvisor will rely on insights that seek to target idiosyncratic company and security specific risk, which form the basis of security selection decisions and assess metrics such as company strength, company outlook, and credit spreads. In addition, the Fund will rely on the Subadvisor’s market timing insights which the Subadvisor uses to form a view on the attractiveness of credit and interest rate markets and assess metrics such as market expectations for growth and credit default rates. The Subadvisor’s models consider data from multiple sources, including issuer-specific and macroeconomic information such as company cash flow, default risk, and earnings expectations.
The Subadvisor expects that the majority of the Fund’s total returns will be generated from security selection of high yield bonds. Positions are sized based on an optimization which aims to effectively translate the insights gleaned from the Subadvisor’s proprietary models into portfolio positions. The Subadvisor’s optimization process seeks to maximize total returns while minimizing expected risk and transaction costs. The Subadvisor measures risk at the portfolio level and on each instrument. Furthermore, concentration risk is minimized by capping exposures based on internal limits for single issuer and single issue positions. The Subadvisor conducts performance measurement and risk analysis to seek to validate the accuracy of the investment process with the aim of achieving continuous improvement over time. The Subadvisor may engage in frequent trading in the Fund to achieve its principal investment strategies.
Duration/Maturity: Although duration may be one of the characteristics considered in security selection, the Fund does

39

Fund Summary
Harbor Scientific Alpha High-Yield ETF
not focus on bonds with any particular duration or maturity and does not seek to maintain the maturity of the Fund’s portfolio in any particular range. The Fund has not commenced operations as of the date of this Prospectus and therefore, the weighted average maturity of the Fund’s portfolio is not available.
Credit Quality: The Fund invests primarily in below investment-grade debt securities, commonly referred to as “high yield” or “junk” bonds, but may invest in other fixed income instruments. As such, the Fund’s weighted average portfolio quality varies from time to time, depending on the level of assets allocated to such securities. The Subadvisor does not seek to actively invest in defaulted securities.
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Fixed income securities fluctuate in price in response to various factors, including changes in interest rates, changes in market conditions and issuer-specific events, and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other possible investments. Principal risks impacting the Fund (in alphabetical order after the first six risks) include:
High-Yield Risk: There is a greater risk that the Fund will lose money because it invests primarily in below investment-grade fixed income securities and unrated securities of similar credit quality (commonly referred to as “high-yield” or “junk” bonds). These securities are considered speculative because they have a higher risk of issuer default, are subject to greater price volatility and may be illiquid.
Model Risk: There are limitations inherent in every quantitative model. The value of securities selected using quantitative analysis can react differently to issuer, political, market, and economic developments than the market as a whole or securities selected using only fundamental analysis. The factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value. In addition, historical trends in data may not be predictive going forward. The strategies and techniques employed in a quantitative model cannot fully match the complexity of the financial markets and therefore sudden unanticipated changes in underlying market conditions can significantly impact their performance. The effectiveness of the given strategy or technique may deteriorate in an unpredictable fashion for any number of reasons including, but not limited to, an increase in the amount of assets managed or the use of similar strategies or techniques by other market participants and/or market dynamic shifts over time. In addition, factors that affect a security’s value can change over time, and these changes may not be reflected in the quantitative model. Any model may contain flaws the existence and effect of which may be discovered only after the fact or not at all. There can be no assurances that the strategies pursued or the techniques implemented in the quantitative model will be profitable, and various market conditions may be materially less favorable to certain strategies than others. Even in the absence of flaws, a model may not perform as anticipated.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market
for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Inflation Risk: As inflation rises, the value of assets of or income, from the Fund’s investments may be worth less, as inflation decreases the value of payments at future dates. As a result, the real value of the Fund’s portfolio could decline.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Credit Risk: The issuer or guarantor of a security owned by the Fund could default on its obligation to pay principal or interest

40

Fund Summary
Harbor Scientific Alpha High-Yield ETF
or its credit rating could be downgraded. Likewise, a counterparty to a derivative or other contractual instrument owned by the Fund could default on its obligation. This risk may be higher for below investment-grade securities.
Derivatives Risk: The value of derivative instruments held by the Fund may not change in the manner expected by the Subadvisor and/or Advisor, as applicable, which could result in disproportionately large losses to the Fund. Derivatives may also be more volatile than other instruments and may create a risk of loss greater than the amount invested. In addition, certain derivatives may be difficult to value and may be illiquid.
ETF Risk: The Fund’s investment in shares of ETFs subjects it to the risks of owning the securities underlying the ETF, as well as the same structural risks faced by an investor purchasing shares of the Fund, including premium/discount risk and trading issues risk. As a shareholder in another ETF, the Fund bears its proportionate share of the ETF’s expenses, subjecting Fund shareholders to duplicative expenses.
Extension Risk: When interest rates are rising, certain callable fixed income securities may be extended because of slower than expected principal payments. This would lock in a below-market interest rate, increase the security’s duration and reduce the value of the security.
Foreign Securities Risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
High Portfolio Turnover Risk: Higher portfolio turnover may adversely affect Fund performance by increasing Fund transaction costs and may lead to the realization and distribution to shareholders of higher capital gains, which may increase a shareholder’s tax liability.
Interest Rate Risk: As interest rates rise, the values of fixed income securities held by the Fund are likely to decrease and reduce the value of the Fund’s portfolio. Securities with longer durations tend to be more sensitive to changes in interest rates and are usually more volatile than securities with shorter durations. For example, a 5 year average duration generally means the price of a fixed income security will decrease in value by 5% if interest rates rise by 1%. Rising interest rates may lead to increased redemptions, increased volatility and decreased liquidity in the fixed income markets, making it more difficult for the Fund to sell its fixed income securities when the Subadvisor may wish to sell or must sell to meet redemptions. During periods when interest rates are low or there are negative interest rates, the Fund’s yield (and total return) also may be low or the Fund may be unable to maintain positive returns or minimize the volatility of the Fund’s net asset value per share. Changing interest rates may have unpredictable effects on the markets, may result in heightened market volatility and may detract from Fund performance. In addition, changes in monetary policy may exacerbate the risks associated with changing interest rates.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Liquidity Risk: A particular investment may be difficult to purchase or sell and the Fund may be unable to sell illiquid securities at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk may result from the lack of an active market, reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income mutual funds may be higher than normal, causing increased supply in the market due to selling activity. Valuation of investments may be difficult, particularly during periods of market volatility or reduced liquidity and for investments that trade infrequently or irregularly. In these circumstances, among others, an investment may be valued using fair value methodologies that are inherently subjective and reflect good faith judgments based on available information.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Prepayment Risk: When interest rates are declining, the issuer of a fixed income security, including a pass-through security such as a mortgage-backed or an asset-backed security, may exercise its option to prepay principal earlier than scheduled, forcing the Fund to reinvest in lower yielding securities.
Selection Risk: The Subadvisor’s judgment about the attractiveness of a particular security may be incorrect. The Subadvisor and/or Advisor, as applicable, potentially will be prevented from executing investment decisions at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that the Subadvisor and/or Advisor, as applicable, believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by the Subadvisor and/or Advisor, as applicable, and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
U.S. Government Securities Risk: Securities issued or guaranteed by U.S. government agencies or government-sponsored entities may not be backed by the full faith and credit of the U.S. government. As a result, no assurance can be given that the U.S. government will provide financial support to these securities or issuers (such as securities issued by the Federal National Mortgage Association, or the Federal Home Loan Mortgage Corporation). Although certain government securities are backed by the full faith and credit of the U.S. government (such as securities issued by the Government National Mortgage Association), circumstances could arise that would delay or prevent the payment of interest or principal. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future and, in these circumstances, the Fund’s returns may be adversely affected.

41

Fund Summary
Harbor Scientific Alpha High-Yield ETF
Performance
The following bar chart and tables are intended to help you understand the risks and potential rewards of investing in the Fund. The bar chart shows the performance of the Fund for the period shown. The table shows how the Fund’s average annual total returns compared to the returns of the Fund’s benchmark index, which includes securities with investment characteristics similar to those held by the Fund. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain updated performance information please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Calendar Year Total Returns
During the time periods shown in the bar chart, the Fund’s highest and lowest returns for a calendar quarter were:
 
Total Returns
Quarter/Year
Best Quarter
5.32%
Q4 2022
Worst Quarter
-8.48%
Q2 2022
Average Annual Total Returns — As of December 31, 2022
 
One
Year
Annualized
Inception
Date
Five
Years
Ten
Years
Since
Inception
Harbor Scientific Alpha High-Yield ETF
Before Taxes
-7.89%
N/A
N/A
-6.12%
9/14/2021
After Taxes on
Distributions
-10.16%
N/A
N/A
-8.28%
 
After Taxes on
Distributions and Sale
of Fund Shares
-4.67%
N/A
N/A
-5.52%
 
Comparative Index
(reflects no deduction for fees, expenses or taxes)
ICE BofA U.S. High
Yield (H0A0)
-11.22%
N/A
N/A
-8.59%
 
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
BlueCove Limited (“BlueCove”) has subadvised the Fund since 2021.
Portfolio Managers
BlueCove employs a team approach in which a number of portfolio management individuals will be involved in the day-to-day investment decision making of the Fund. Mr. Brodsky, Mr. Harper, Mr. Thomas and Mr. Flannery are jointly responsible for managing the Fund.
(Benjamin Brodsky photo)
Benjamin Brodsky, CFA
BlueCove Limited
Mr. Brodsky is Chief Investment Officer of BlueCove and has managed the Fund since 2021.
(Mike Harper photo)
Michael Harper, CFA
BlueCove Limited
Mr. Harper is Head of Portfolio Management of BlueCove and has managed the Fund since 2021.
(Benoy Thomas photo)
Benoy Thomas, CFA
BlueCove Limited
Mr. Thomas is Head of Credit of BlueCove and has managed the Fund since 2021.
(Garth Flannery photo)
Garth Flannery, CFA
BlueCove Limited
Mr. Flannery is Head of Asset Allocation of BlueCove and has managed the Fund since 2021.

42

Fund Summary
Harbor Scientific Alpha High-Yield ETF
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

43

Harbor Scientific Alpha Income ETF
Fund Summary
Investment Objective
The Fund seeks total return.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
Rate
Management Fees
0.50%
Distribution and Service (12b-1) Fees
0.00%
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.50%
1Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
Expense Example
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be:
 
One
Year
Three
Years
Five
Years
Ten
Years
Cost
$51
$160
$280
$628
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 124%. Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
The Fund invests primarily in fixed income instruments, including fixed income derivative instruments such as credit default swaps and U.S. Treasury futures. The Fund may invest in exchange-traded funds to manage aggregate portfolio exposures. The Fund may also invest in the securities of foreign issuers, including emerging market bonds. The Fund may invest a majority of its assets in below investment-grade corporate bonds, commonly referred to as “high yield” or “junk” bonds, or unrated securities that BlueCove Limited (the “Subadvisor”) considers to be of an equivalent credit quality. The Subadvisor determines whether a bond is rated below investment grade using a composite rating calculated by assigning a numerical value to those ratings of Moody’s, S&P and Fitch which are available for the bond and averaging those amounts to determine the rating.
The Subadvisor defines scientific alpha as the investment returns generated from following a structured investment process based on the testing of investment hypotheses using historical data. The Subadvisor’s portfolio management team retains discretion with respect to all investment decisions.
The Subadvisor’s investment process utilizes proprietary quantitative models to produce investment recommendations. The Subadvisor generates proprietary insights based on its experience and reasoned intuition to form an investment hypothesis. Using historical market data, the Subadvisor back-tests each investment hypothesis to determine whether actual observations appear consistent with the hypothesis over time. The Subadvisor’s back-testing process involves the development of research parameters, internal peer review, and consideration of a wide range of analyses. Insights are weighted in the Subadvisor’s models according to their deemed strength in predicting returns, as determined by the Subadvisor through this testing process. In managing the Fund, the Subadvisor will rely on market timing insights, which form the basis of asset allocation decisions between corporate credit and interest rate markets and assess metrics such as market expectations for growth and credit default rates. In addition, the Fund will rely on the Subadvisor’s insights that seek to target idiosyncratic company and security specific risk by assessing metrics such as company strength, company outlook, and credit spreads. The Subadvisor’s models consider data from multiple sources, including macroeconomic and issuer-specific information such as default rates, risk appetite, and earnings expectations.
The Subadvisor expects that the majority of the Fund’s total returns will be generated from coupon income and from asset allocation decisions. Positions are sized based on an optimization which aims to effectively translate the insights gleaned from the Subadvisor’s proprietary models into portfolio positions. The Subadvisor’s optimization process seeks to maximize total returns while minimizing expected risk and transaction costs with an aim to manage volatility and drawdown risks. The Subadvisor measures risk at the portfolio level, asset-class level and on each instrument. Furthermore, concentration risk is minimized by capping the exposure based on internal limits for a single issuer and single issue positions, as well as internal limits on the maximum high yield exposure in the Fund. The Subadvisor conducts performance measurement and risk analysis to seek to validate the accuracy of the investment process through both insight and decision attribution, with the aim of achieving continuous improvement over time. The Subadvisor may engage in frequent trading in the Fund to achieve its principal investment strategies.
Duration/Maturity: Duration is one of the characteristics that may be considered in the investment process. The Fund does not

44

Fund Summary
Harbor Scientific Alpha Income ETF
focus on bonds with any particular duration or maturity and does not seek to maintain the maturity of the Fund’s portfolio in any particular range. The Fund has not commenced operations as of the date of this Prospectus and therefore, the weighted average maturity of the Fund’s portfolio is not available.
Credit Quality: Under normal market conditions, the Fund may invest the majority of its assets in below investment-grade debt securities, commonly referred to as “high yield” or “junk” bonds, in addition to investment-grade securities. As such, the Fund’s weighted average portfolio quality varies from time to time, depending on the level of assets allocated to such securities. The Subadvisor does not seek to actively invest in defaulted securities.
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Fixed income securities fluctuate in price in response to various factors, including changes in interest rates, changes in market conditions and issuer-specific events, and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other possible investments. Principal risks impacting the Fund (in alphabetical order after the first five risks) include:
Model Risk: There are limitations inherent in every quantitative model. The value of securities selected using quantitative analysis can react differently to issuer, political, market, and economic developments than the market as a whole or securities selected using only fundamental analysis. The factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value. In addition, historical trends in data may not be predictive going forward. The strategies and techniques employed in a quantitative model cannot fully match the complexity of the financial markets and therefore sudden unanticipated changes in underlying market conditions can significantly impact their performance. The effectiveness of the given strategy or technique may deteriorate in an unpredictable fashion for any number of reasons including, but not limited to, an increase in the amount of assets managed or the use of similar strategies or techniques by other market participants and/or market dynamic shifts over time. In addition, factors that affect a security’s value can change over time, and these changes may not be reflected in the quantitative model. Any model may contain flaws the existence and effect of which may be discovered only after the fact or not at all. There can be no assurances that the strategies pursued or the techniques implemented in the quantitative model will be profitable, and various market conditions may be materially less favorable to certain strategies than others. Even in the absence of flaws, a model may not perform as anticipated.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asst value. However, given that shares can be purchased and redeemed in Creation Units , and only to and
from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, acts of terrorism, social unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, sanctions, the spread of infectious illness or other public health threats could also significantly impact the Fund and its investments.
Inflation Risk: As inflation rises, the value of assets of or income, from the Fund’s investments may be worth less, as inflation decreases the value of payments at future dates. As a result, the real value of the Fund’s portfolio could decline.
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Cash Transactions Risk: The Fund will effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Credit Risk: The issuer or guarantor of a security owned by the Fund could default on its obligation to pay principal or interest or its credit rating could be downgraded. Likewise, a counterparty to a derivative or other contractual instrument owned by the Fund could default on its obligation. This risk may be higher for below investment-grade securities.
Derivatives Risk: The value of derivative instruments held by the Fund may not change in the manner expected by the Subadvisor and/or Advisor, as applicable, which could result in

45

Fund Summary
Harbor Scientific Alpha Income ETF
disproportionately large losses to the Fund. Derivatives may also be more volatile than other instruments and may create a risk of loss greater than the amount invested. In addition, certain derivatives may be difficult to value and may be illiquid.
Emerging Market Risk: Because the Fund may invest in securities of emerging market issuers, an investment in the Fund may be subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. The securities markets of many foreign countries are relatively small, with a limited number of companies representing a small number of industries. If foreign securities are denominated and traded in a foreign currency, the value of the Fund’s foreign holdings can be affected by currency exchange rates and exchange control regulations. The Fund’s investments in foreign securities may also be subject to foreign withholding taxes.
Foreign securities risks are more significant in emerging market countries. These countries may have relatively unstable governments and less-established market economies than developed countries. Emerging markets may face greater social, economic, regulatory and political uncertainties. These risks make emerging market securities more volatile and less liquid than securities issued in more developed countries. Securities exchanges in emerging markets may suspend listed securities from trading for substantially longer periods of time than exchanges in developed markets, including for periods of a year or longer. If the Fund is holding a suspended security, that security would become completely illiquid as the Fund would not be able to dispose of the security until the suspension is lifted. In such instances, it can also be difficult to determine an appropriate valuation for the security because of a lack of trading and uncertainty as to when trading may resume.
Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
ETF Risk: The Fund’s investment in shares of ETFs subjects it to the risks of owning the securities underlying the ETF, as well as the same structural risks faced by an investor purchasing shares of the Fund, including premium/discount risk and trading issues risk. As a shareholder in another ETF, the Fund bears its proportionate share of the ETF’s expenses, subjecting Fund shareholders to duplicative expenses.
Extension Risk: When interest rates are rising, certain callable fixed income securities may be extended because of slower than expected principal payments. This would lock in a below-market interest rate, increase the security’s duration and reduce the value of the security.
Foreign Currency Risk: As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency hedged. In either event, the dollar value of an investment in the Fund would be adversely affected.
Foreign Securities Risk: Because the Fund may invest in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include
heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, possible sanctions by governmental bodies of other countries and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. These risks are more significant for issuers in emerging market countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.
High Portfolio Turnover Risk: Higher portfolio turnover may adversely affect Fund performance by increasing Fund transaction costs and may lead to the realization and distribution to shareholders of higher capital gains, which may increase a shareholder’s tax liability.
High-Yield Risk: There is a greater risk that the Fund will lose money because it invests primarily in below investment-grade fixed income securities and unrated securities of similar credit quality (commonly referred to as “high-yield” or “junk” bonds). These securities are considered speculative because they have a higher risk of issuer default, are subject to greater price volatility and may be illiquid.
Interest Rate Risk: As interest rates rise, the values of fixed income securities held by the Fund are likely to decrease and reduce the value of the Fund’s portfolio. Securities with longer durations tend to be more sensitive to changes in interest rates and are usually more volatile than securities with shorter durations. For example, a 5 year average duration generally means the price of a fixed income security will decrease in value by 5% if interest rates rise by 1%. Rising interest rates may lead to increased redemptions, increased volatility and decreased liquidity in the fixed income markets, making it more difficult for the Fund to sell its fixed income securities when the Subadvisor may wish to sell or must sell to meet redemptions. During periods when interest rates are low or there are negative interest rates, the Fund’s yield (and total return) also may be low or the Fund may be unable to maintain positive returns or minimize the volatility of the Fund’s net asset value per share. Changing interest rates may have unpredictable effects on the markets, may result in heightened market volatility and may detract from Fund performance. In addition, changes in monetary policy may exacerbate the risks associated with changing interest rates.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s stock, sometimes rapidly or unpredictably.
Liquidity Risk: The market for high-yield bonds is less liquid than the market for investment-grade bonds. The Fund may at times have greater difficulty buying or selling specific high-yield bonds at prices the Subadvisor believes are reasonable, which would be adverse to the Fund. Valuation of investments may be difficult, particularly during periods of market volatility or reduced liquidity and for investments that trade infrequently or irregularly. In these circumstances, among others, an investment may be valued using fair value methodologies that are inherently subjective and reflect good faith judgments based on available information.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.

46

Fund Summary
Harbor Scientific Alpha Income ETF
Prepayment Risk: When interest rates are declining, the issuer of a fixed income security, including a pass-through security such as a mortgage-backed or an asset-backed security, may exercise its option to prepay principal earlier than scheduled, forcing the Fund to reinvest in lower yielding securities.
Selection Risk: The Subadvisor’s judgment about the attractiveness of a particular security may be incorrect. The Subadvisor and/or Advisor, as applicable, potentially will be prevented from executing investment decisions at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that the Subadvisor and/or Advisor, as applicable, believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by the Subadvisor and/or Advisor, as applicable, and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
U.S. Government Securities Risk: Securities issued or guaranteed by U.S. government agencies or government-sponsored entities may not be backed by the full faith and credit of the U.S. government. As a result, no assurance can be given that the U.S. government will provide financial support to these securities or issuers (such as securities issued by the Federal National Mortgage Association, or the Federal Home Loan Mortgage Corporation). Although certain government securities are backed by the full faith and credit of the U.S. government (such as securities issued by the Government National Mortgage Association), circumstances could arise that would delay or prevent the payment of interest or principal. It is possible that issuers of U.S. government securities will not have the funds to meet their payment obligations in the future and, in these circumstances, the Fund’s returns may be adversely affected.
Performance
The following bar chart and tables are intended to help you understand the risks and potential rewards of investing in the Fund. The bar chart shows the performance of the Fund for the period shown. The table shows how the Fund’s average annual total returns compared to the returns of the Fund’s benchmark index, which includes securities with investment characteristics similar to those held by the Fund. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain updated performance information please visit the Fund’s website at harborcapital.com or call 800-422-1050.
Calendar Year Total Returns
During the time periods shown in the bar chart, the Fund’s highest and lowest returns for a calendar quarter were:
 
Total Returns
Quarter/Year
Best Quarter
2.89%
Q4 2022
Worst Quarter
-6.63%
Q1 2022
Average Annual Total Returns — As of December 31, 2022
 
One
Year
Annualized
Inception
Date
Five
Years
Ten
Years
Since
Inception
Harbor Scientific Alpha Income ETF
Before Taxes
-10.85%
N/A
N/A
-9.27%
9/14/2021
After Taxes on
Distributions
-12.21%
N/A
N/A
-10.59%
 
After Taxes on
Distributions and Sale
of Fund Shares
-6.41%
N/A
N/A
-7.56%
 
Comparative Index
(reflects no deduction for fees, expenses or taxes)
Bloomberg
U.S. Aggregate Bond
-13.01%
N/A
N/A
-11.01%
 

47

Fund Summary
Harbor Scientific Alpha Income ETF
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
Subadvisor
BlueCove Limited (“BlueCove”) has subadvised the Fund since 2021.
Portfolio Managers
BlueCove employs a team approach in which a number of portfolio management individuals will be involved in the day-to-day investment decision making of the Fund. Mr. Brodsky, Mr. Harper, Mr. Flannery and Mr. Thomas are jointly responsible for managing the Fund. 
(Benjamin Brodsky photo)
Benjamin Brodsky, CFA
BlueCove Limited
Mr. Brodsky is Chief Investment Officer of BlueCove and has managed the Fund since 2021.
(Mike Harper photo)
Michael Harper, CFA
BlueCove Limited
Mr. Harper is Head of Portfolio Management of BlueCove and has managed the Fund since 2021.
(Garth Flannery photo)
Garth Flannery, CFA
BlueCove Limited
Mr. Flannery is Head of Asset Allocation of BlueCove and has managed the Fund since 2021.
(Benoy Thomas photo)
Benoy Thomas, CFA
BlueCove Limited
Mr. Thomas is Head of Credit of BlueCove and has managed the Fund since 2021.
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.

48

Additional Information about the Funds' Investments
Investment Objective
Harbor ETF Trust’s Board of Trustees (the “Board of Trustees”) may change a Fund’s investment objective without shareholder approval.

Investment Policies
The 80% investment policy of Harbor Corporate Culture ETF, Harbor Corporate Culture Leaders ETF, Harbor Dividend Growth Leaders ETF, Harbor Energy Transition Strategy ETF, Harbor Health Care ETF and Harbor Scientific Alpha High-Yield ETF may be changed by the Fund upon 60 days’ advance notice to shareholders. For purposes of the Harbor Health Care ETF’s 80% investment policy, the Fund considers an issuer to be “principally engaged in the research, development, production, or distribution of products and services related to the health care industry” if it derives greater than 50% of its revenues from within the health care industry or, for issuers that have yet to generate revenue, the issuer’s research and development and products/services target or operate within the health care industry as defined by a third party.

Indexing and Index Description
INDEXING
Each of Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF), Harbor Corporate Culture ETF, Harbor Corporate Culture Leaders ETF and Harbor Energy Transition Strategy ETF utilizes indexing. Indexing is an investment strategy for tracking the performance of a specified index. An index is a group of securities or other financial instruments that represents and measures the performance of a particular market. Indexes can represent entire markets or market segments. Investors cannot invest directly in an index. Index funds hold securities or other financial instruments that are representative of an entire index, so that the performance rises and falls alongside that index.
The Index Provider is responsible for determining the composition of the index, including the securities or other financial instruments held and their relative weightings. Generally, the Index Provider does not provide any warranty, or accept any liability, with respect to the quality, accuracy or completeness of the index or its related data. The Index Provider may make errors from time to time, which may not be identified by the Index Provider for a period of time or at all. The gains, losses or costs associated with the Index Provider’s errors will generally be borne by the index fund and its shareholders.
An index fund seeks to hold all, or a representative sample, of the securities or other financial instruments that comprise or otherwise track its target index and attempt to mirror the target index’s performance, for better or worse. However, an index fund generally does not perform exactly like its target index. An index fund’s operating expenses and transaction costs will impact the performance of an index fund relative to its target index. The timing and size of cash flows, the size of the fund and other factors may also impact the ability of an index fund to match its performance to that of its target index.
INDEX REPLICATION STRATEGY
Although Harbor Corporate Culture ETF and Harbor Corporate Culture Leaders ETF generally will use a replication strategy, meaning that each Fund generally holds each security found in the Index in approximately the same proportion as represented in the Index itself, each Fund may utilize a representative sampling strategy with respect to the Index when it might not be possible or practicable to purchase all of the securities of the Index in approximately the same proportions as in the Index. For example, this might occur when there are practical difficulties or substantial costs involved in compiling a portfolio of securities to replicate the Index, in instances in which a security in the Index becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations (such as tax diversification requirements) that apply to a Fund but not the Index. A fund using a replication strategy can be expected to have greater correlation to the index than one using a representative sampling strategy.
Each Fund’s use of representative sampling may result in it holding a smaller number of securities than are in the Index. As a result, an adverse development with respect to an issuer of a security held by a Fund could result in a greater decline in net asset value than would be the case if the Fund held all the securities of the Index. Conversely, a positive development relating to an issuer of a security in the Index that is not held by a Fund could cause the Fund to underperform the Index. To the extent the assets in a Fund are smaller, these risks will be greater. A representative sampling strategy may increase a Fund’s susceptibility to Index Tracking Risk.
Each Fund may also, in order to comply with the tax diversification requirements of the Internal Revenue Code of 1986, as amended (“Internal Revenue Code”), temporarily invest in securities not included in the Index that are expected to be highly correlated with the securities included in the Index.
Each Fund reserves the right to substitute a different index for the Index if the Index is discontinued, if the Advisor’s agreement with the Index Provider is terminated, or for any other reason determined in good faith by the Board of Trustees.
The CIBC Human Capital Index
The CIBC Human Capital Index, created by the Canadian Imperial Bank of Commerce (“CIBC”), is a thematic index based on a quantitative measurement of a company’s human capital. The Index is comprised primarily of a modified market capitalization-weighted portfolio of equity securities of U.S. companies

49

Additional Information about the Funds' Investments
identified by a proprietary scoring methodology developed by Irrational Capital, which seeks to identify companies with strong corporate culture. CIBC, Irrational Capital and the Advisor are not affiliated with one another.
CIBC constructs the Index utilizing a rules-based methodology summarized below.
Index Universe: The eligible “index universe” consists of all constituents of the Solactive GBS United States 500 Index. Only common stocks and ADRs that are traded on public exchanges in the United States are eligible to be included in the Index. Shares of certain issuers may be excluded from the index universe based on impending corporate actions or certain other events anticipated to have a material impact on the shares.
Index Construction Process: Prior to rescreening dates, the calculation agent will receive a list of top scoring firms from Irrational Capital. Any firm on that list that is also in the index universe will be included in the Index. The Index targets the same sector weights across eleven sectors (communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate and utilities) as the index universe at each reconstitution. The Index typically includes approximately 150 companies.
On reconstitution dates, Index constituents within each sector are weighted based on their float-adjusted (meaning only counting shares that are available for public trading) market capitalization. Individual stock weights are subject to certain caps. After applying the capping rules, if a sector’s weight becomes less than its weight in the index universe, a sector proxy will be used to fill in the remaining weight to ensure sector neutrality. The sector proxies consist of exchange-traded funds that invest specifically in the stocks and securities of the corresponding sector (known as sector ETFs).
The Index is normally reconstituted annually. CIBC may carry out additional ad hoc index rebalances or delay or cancel a scheduled reconstitution of the Index or the implementation of certain rules at its sole discretion. In general, the addition or removal of securities will occur on the reconstitution dates, and no changes will be made to the Index between reconstitution dates.
The process Irrational Capital uses to score companies is designed to translate non-financial information into metrics that offer insight into financial performance, i.e., quantifying the impact of corporate culture and employee motivation. This involves the following steps:
Irrational Capital’s proprietary company scoring methodology is derived from assessments of intrinsic motivation (i.e., appreciation, pride, motivation, sense of caring, sense of purpose) and to a lesser degree, measurements of extrinsic employee motivation such as compensation. Public and non-public data is aggregated, synthesized, and used to score publicly traded companies.
Proprietary, mathematical modeling and various data science techniques are used to bring approximately 30 underlying human capital characteristics into the final score. The combination of the characteristics is determined based on research into the relationship between those characteristics and value creation at a company. Irrational Capital reduces the dimensions into a single representative score for each company.
The same model is used across all sectors and industries. Companies with higher scores signal better human capital performance of a company. Irrational Capital calculates scores annually.
CIBC has licensed the Index to the Advisor. Harbor Corporate Culture ETF is entitled to use the Index pursuant to a sub-licensing arrangement with the Advisor at no charge to the Fund. The Fund does not pay the Advisor for the use of the Index and all licensing costs associated with the Index are paid by the Advisor.
Solactive AG (“Solactive”) calculates, publishes and distributes the Index. Neither the Fund nor Harbor Capital provides any warranty or guarantee against errors made by CIBC in constructing the Index or Solactive in calculating the Index. Information regarding the Index is available at http://www.solactive.com.
The Human Capital Factor Unconstrained Index
The Human Capital Factor Unconstrained Index, created by Irrational Capital, is a thematic index based on a quantitative measurement of companies’ human capital. Under normal circumstances, the Index contains approximately 70 to 100 companies with high Human Capital Factor scores, as determined by a proprietary scoring methodology developed by Irrational Capital. Irrational Capital is not affiliated with the Advisor.
Irrational Capital constructs the Index utilizing a rules-based methodology summarized below.
Index Universe: The eligible “Index Universe” consists of all constituents of the Solactive GBS United States 1000 Index with a minimum market capitalization of $1 billion. Only common stocks and ADRs that are traded on public exchanges in the United States are eligible to be included in the Index. Shares of certain issuers may be excluded from the Index Universe based on impending corporate actions or certain other events anticipated to have a material impact on the shares. In addition, shares of companies for which Irrational Capital is unable to calculate a Human Capital Factor score are omitted from the Index.
Index Construction Process: The Index construction process is designed to translate non-financial

50

Additional Information about the Funds' Investments
information into metrics that offer insight into financial performance, i.e., quantifying the impact of corporate culture and employee motivation. This involves the following steps:
Irrational Capital uses public and non-public data to calculate its Human Capital Factor score. Irrational Capital’s proprietary company scoring methodology is derived from assessments of intrinsic motivation (i.e., appreciation, pride, motivation, sense of caring, sense of purpose) and to a lesser degree, measurements of extrinsic employee motivation such as compensation. The data is aggregated, synthesized, and used to score publicly traded companies.
Proprietary, mathematical modeling and various data science techniques are used to bring approximately 30 underlying Human Capital Factor characteristics into the final Human Capital Factor score. The combination of the characteristics is determined based on research into the relationship between those characteristics and value creation at a company. Irrational Capital reduces the dimensions into a single representative score for each company (the Human Capital Factor score).
Companies are scored by their Human Capital Factor performance. The same model is used across all sectors and industries. Companies with higher scores signal better human capital performance of a company.
The Index is composed of the 70 to 100 companies with the highest Human Capital Factor scores. The total number of companies is determined in accordance with certain industry concentration limitations.
The securities in the Index are equally weighted at the time of reconstitution and rebalancing.
IC calculates Human Capital Factor scores annually. Under normal circumstances, the Index is reconstituted annually and rebalanced quarterly. IC may carry out additional ad hoc index rebalances or delay or cancel a scheduled rebalancing or reconstitution of the Index or the implementation of certain rules at its sole discretion. In general, the addition or removal of securities will occur on the rebalancing dates, and no changes will be made to the Index between rebalancing dates.
Irrational Capital has licensed the Index to the Advisor. Harbor Corporate Culture Leaders ETF is entitled to use the Index pursuant to a sub-licensing arrangement with the Advisor at no charge to the Fund. Harbor Corporate Culture Leaders ETF does not pay the Advisor for the use of the Index and all licensing costs associated with the Index are paid by the Advisor.
The Advisor has entered into an agreement with Solactive AG (“Solactive”) to calculate, publish and distribute the Index. The Fund is not sponsored, promoted, sold or supported in any other manner by Solactive nor does Solactive offer any express or implicit guarantee or assurance either with regard to the results of using the Index and/or its trademark or price at any time or in any other respect. Solactive uses its best efforts to ensure that the Index is calculated correctly. Solactive has no obligation to point out errors in the Index to third parties including but not limited to investors and/or financial intermediaries of the Fund. Neither publication of the Index by Solactive nor the licensing of the Index or its trademark for the purpose of use in connection with the Fund constitutes a recommendation by Solactive to invest capital in the Fund nor does it in any way represent an assurance or opinion of Solactive with regard to any investment in the Fund. Solactive is not affiliated with the Advisor. Neither the Fund nor Harbor Capital provides any warranty or guarantee against errors made by Irrational Capital in constructing the Index or Solactive in calculating the Index. Information regarding the Index is available at http://www.solactive.com.
HUMAN CAPITAL SCORING RISK
The theories upon which CIBC and IC base the CIBC Human Capital Index and the Human Capital Factor Unconstrained Index may be unsound or unable to be demonstrated. There is a possibility that the approach taken by IC to quantitatively score a company’s human capital does not work, such as because it is too difficult to quantify what is inherently qualitative or the particular methodology used turns out not to be the most accurate.
IC relies upon a range of proprietary data relating to individual companies as inputs into its Human Capital Factor scoring system. Some of that data may prove to be inaccurate, less reliable or less available at points in time in the future, causing the scoring system overall to be less precise or even inaccurate with respect to individual companies. This could result in the Index including companies that would not be considered to have strong corporate culture and/or omitting companies that would be considered to have strong corporate culture. The use of sector ETFs or other sector proxies to maintain sector neutrality may result in indirect exposure to companies that would not be considered to have strong corporate culture and would not otherwise be included in the Index.
The Quantix Energy Transition Index
The Quantix Energy Transition Index was developed by Quantix Commodities Indices LLC (“QCI”), an affiliate of Quantix Commodities LP, Harbor Energy Transition Strategy ETF’s subadvisor (“Quantix” or the Subadviser”), with the objective of providing diversified exposure to the building blocks of the accelerating transition from carbon-intensive energy sources to less carbon intensive sources of energy using commodity futures. The commodities that comprise the Index serve one of three purposes associated with the them:

51

Additional Information about the Funds' Investments
(1) they are used to construct the new energy infrastructure (for example, copper, aluminum, and silver); (2) they are “bridge fuels” that are less carbon-intensive and will provide energy between now and the net-zero state (for example, natural gas); or (3) they incentivize investment in the new energy infrastructure (for example, carbon credits). Commodity futures that provide exposure to the energy transition theme are considered component candidates for inclusion in the Index. The investment universe of component candidates for the Index consists of futures contracts traded on an exchange in either the United States, Canada, United Kingdom or Europe on the following commodities: copper, aluminum, nickel, zinc, lead, natural gas (U.S.), natural gas (U.K.), natural gas (Europe), silver, palladium, platinum, soybean oil, ethanol, emissions – European Union Allowances (EUA), and emissions - Capital Cost Allowances (CCA). This selection of commodities is fixed as of the date of this Prospectus but is subject to periodic review by QCI. Under normal conditions, the Index maintains exposure to at least 10 commodities from its eligible universe.
Commodity futures from the component candidates are selected for the Index and weighted based on the Index Provider’s quantitative methodology, which involves two steps:
Step 1: For each eligible commodity contract, the Index Provider calculates the economic significance weight, or economic importance within the overall universe, based upon level of trading. Specifically, economic significance weight is calculated using a rolling average of the open interest (i.e., the total number of outstanding contracts that have not been settled) in each futures contract relative to the sum of the open interest of the eligible universe, based on information published by the applicable futures exchanges.
Step 2: The Index Provider applies maximum sector weights and maximum and minimum commodity weights to ensure diversification within the Index.
The Index may include foreign currency denominated commodity futures contracts. Because the Index is a commodity index that is not designed to generate returns from changes in foreign exchange rates, the Index methodology provides for the conversion of futures prices from local currencies into U.S. dollars and hedges local currency exposure back into U.S. dollars.
The Index is calculated on a “total return” basis, meaning that the returns of the futures contracts included in the Index are combined with the returns on cash collateral invested in 13-week U.S. Treasury Bills. The Index includes provisions for the replacement of futures contracts as they approach maturity based on a predetermined schedule.
The Index Provider determines the commodity futures contracts to be included in the Index for the following year on an annual basis and the Index is reweighted monthly based on open interest of the constituent commodity futures contracts.
QCI has licensed the Index to the Advisor. Harbor Energy Transition Strategy ETF is entitled to use the Index pursuant to a sub-licensing arrangement with the Advisor at no charge to the Fund. QCI makes no representation or warranty, express or implied, to the owners of Shares of the Fund or any member of the public regarding the advisability of investing in securities or other financial instruments generally or in the Shares of the Fund particularly or the ability of the Index to track the performance of its respective securities market. QCI, in its role as Index Provider, has no obligation to take the needs of the Advisor or the owners of Shares of the Fund into consideration in determining or composing the Index. QCI is not responsible for and has not participated in the determination of the timing of, prices at, or quantities of the Shares of the Fund to be issued or in the determination or calculation of the equation by which the Shares of the Fund are to be converted into cash.
Quantix has entered into an agreement with Solactive AG (“Solactive”) to calculate, publish and distribute the Index. The Fund is not sponsored, promoted, sold or supported in any other manner by Solactive nor does Solactive offer any express or implicit guarantee or assurance either with regard to the results of using the Index and/or its trademark or price at any time or in any other respect. Solactive uses its best efforts to ensure that the Index is calculated correctly. Solactive has no obligation to point out errors in the Index to third parties including but not limited to investors and/or financial intermediaries of the Fund. Neither publication of the Index by Solactive constitutes a recommendation by Solactive to invest capital in the Fund nor does it in any way represent an assurance or opinion of Solactive with regard to any investment in the Fund. Solactive is not affiliated with Quantix, QCI or the Advisor. Harbor Capital does not provide any warranty or guarantee against errors made by Quantix in constructing the Index or Solactive in calculating the Index. Information regarding the Index is available at http://www.solactive.com.
The Fund reserves the right to substitute a different index for the Index if the Index is discontinued, if the Advisor’s agreement with the Index Provider is terminated, or for any other reason determined in good faith by the Board of Trustees.
The Quantix Commodity Index (formerly, the Quantix Inflation Index)
The Quantix Commodity Index was developed Quantix Commodities Indices LLC (“QCI”), an affiliate of Quantix Commodities LP, Harbor Commodity All-Weather Strategy ETF’s subadvisor (“Quantix” or

52

Additional Information about the Funds' Investments
the Subadviser”), with the objective of being a diversified inflation hedge for investors using commodity futures. The investment universe of the Index consists of U.S. dollar-denominated futures contracts traded on an exchange in either the United States or United Kingdom on the following commodities: WTI crude oil, Brent crude oil, heating oil, gasoil, RBOB gasoline, natural gas, corn, wheat, KC wheat, soybeans, soymeal, soybean oil, cocoa, cotton, coffee, sugar, live cattle, lean hogs, copper, aluminum, nickel, zinc, gold and silver. This selection of commodities is fixed as of the date of this Prospectus, but is subject to periodic review by Quantix. Under normal conditions, the Index maintains exposure to at least 15 commodities from its eligible universe.
Commodity futures in the eligible universe are selected for the Index and weighted based on Quantix’s quantitative methodology, which involves five steps:
Step 1: Quantix calculates the economic significance of each eligible commodity futures contract (i.e., the weight of each such commodity futures contract relative to the size of the eligible universe). The economic significance is calculated using a rolling average of the open interest of each commodity (i.e., open positions in futures contracts on the commodity) relative to the sum of the open interest of the eligible universe.
Step 2: Quantix calculates a “quality score” for each eligible commodity futures contract based on (i) the sensitivity of the futures contract to inflation and (ii) the cost of holding a rolling futures position in the contract. Inflation sensitivity of a commodity futures contract is calculated based on pass-through cost (i.e., how much of a change in the commodity futures contract price is passed through to the actual commodity or to a commodity product created from the commodity) and certain metrics involving correlation of the commodity futures contract to the U.S. Consumer Price Index. The quality score is negative for commodity futures contracts that have a relatively lower inflation sensitivity and/or roll return and positive for commodity futures contracts that have a relatively higher inflation sensitivity and/or roll return.
Step 3: The weights of eligible commodity futures contracts determined based on their economic significance are then adjusted based on their quality scores. A relatively low quality score results in a weight lower than the economic significance weight and a relatively high quality score results in a weight higher than the economic significance weight.
Step 4: Quantix applies maximum sector weights and maximum and minimum commodity weights to ensure diversification within the Index in an effort to provide broad-based commodities exposure and retain liquidity.
Step 5: Quantix utilizes its proprietary “Scarcity Debasement Indicator” (“SDI”) to determine whether the weight of gold-linked futures contracts should be adjusted based on the market environment. The SDI seeks to identify environments when the source of inflation is more likely to be debasement, or lowering of the value of the currency, as opposed to commodity scarcity relative to demand. If the SDI signals an environment where inflation is more likely a result of commodity scarcity, the weight of gold-linked futures contracts is as determined by steps 1 through 4. If the SDI signals an environment where inflation is more likely a result of currency debasement, the weight of gold-linked futures contracts is increased in accordance with the strength of the indicator, subject to a specified maximum.
The Index includes provisions for the replacement of futures contracts as they approach maturity based on a predetermined schedule.
Under normal circumstances, the Index is reconstituted and reweighted quarterly.
Quantix has licensed the Index to the Advisor. Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF) is entitled to use the Index pursuant to a sub-licensing arrangement with the Advisor at no charge to the Fund. Quantix makes no representation or warranty, express or implied, to the owners of Shares of the Fund or any member of the public regarding the advisability of investing in securities or other financial instruments generally or in the Shares of the Fund particularly or the ability of the Index to track the performance of its respective securities market. Quantix, in its role as Index Provider, has no obligation to take the needs of the Advisor or the owners of Shares of the Fund into consideration in determining or composing the Index. Quantix is not responsible for and has not participated in the determination of the timing of, prices at, or quantities of the Shares of the Fund to be issued or in the determination or calculation of the equation by which the Shares of the Fund are to be converted into cash.
Quantix has entered into an agreement with Solactive AG (“Solactive”) to calculate, publish and distribute the Index. The Fund is not sponsored, promoted, sold or supported in any other manner by Solactive nor does Solactive offer any express or implicit guarantee or assurance either with regard to the results of using the Index and/or its trademark or price at any time or in any other respect. Solactive uses its best efforts to ensure that the Index is calculated correctly. Solactive has no obligation to point out errors in the Index to third parties including but not limited to investors and/or financial intermediaries of the Fund. Neither publication of the Index by Solactive constitutes a recommendation by Solactive to invest capital in the Fund nor does it in any way represent an assurance or opinion of Solactive with regard to any investment in the Fund. Solactive is not affiliated with Quantix or the Advisor. Harbor Capital does

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not provide any warranty or guarantee against errors made by Quantix in constructing the Index or Solactive in calculating the Index. Information regarding the Index is available at http://www.solactive.com.
The Fund reserves the right to substitute a different index for the Index if the Index is discontinued, if the Advisor’s agreement with the Index Provider is terminated, or for any other reason determined in good faith by the Board of Trustees.

Principal Investments
Each Fund’s principal investment strategies are described in the Fund Summary section.
The main risks associated with investing in each Fund are summarized in the respective Fund Summary section at the front of this Prospectus.
For additional risk factors that are not discussed in this Prospectus because they are not considered main risk factors, see Harbor ETF Trust’s Statement of Additional Information.
An investment in a Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. A Fund’s shares will go up and down in price, meaning that you could lose money by investing in a Fund. Many factors influence a fund’s performance and a Fund’s investment strategy may not produce the intended results.
More detailed descriptions of certain of the main risks and additional risks of certain of the Funds are described below.
The name, investment objective and policies of Harbor Disruptive Innovation ETF are similar to those of other funds advised by the Advisor. However, the investment results of the Fund may be higher or lower than, and there is no guarantee that the investment results of the Fund will be comparable to, any other of these funds. A new fund or a fund with fewer assets under management may be more significantly affected by purchases and redemptions of its Creation Units than a fund with relatively greater assets under management would be affected by purchases and redemptions of its shares. As compared to a larger fund, a new or smaller fund is more likely to sell a comparatively large portion of its portfolio to meet significant Creation Unit redemptions, or invest a comparatively large amount of cash to facilitate Creation Unit purchases, in each case when the fund otherwise would not seek to do so. Such transactions may cause funds to make investment decisions at inopportune times or prices or miss attractive investment opportunities. Such transactions may also accelerate the realization of taxable income if sales of securities result in gains and the fund redeems Creation Units for cash, or otherwise cause a fund to perform differently than intended. While such risks may apply to funds of any size, such risks are heightened in funds with fewer assets under management. In addition, new funds may not be able to fully implement their investment strategy immediately upon commencing investment operations, which could reduce investment performance.
EQUITY SECURITIES
Equity securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. Harbor Corporate Culture ETF, Harbor Corporate Culture Leaders ETF, Harbor Disruptive Innovation ETF, Harbor Dividend Growth Leaders ETF, Harbor Health Care ETF and Harbor Long-Term Growers ETF may invest in common and preferred stocks as well as depositary receipts. Harbor Dividend Growth Leaders ETF may also invest in privately issued equity and securities, warrants, rights to subscribe to common stocks and interests in MLPs. Harbor Health Care ETF may also invest in privately issued equity and securities. Harbor International Compounders ETF may invest in common stocks and depositary receipts.
COMMON STOCK
Common stocks are shares of a corporation or other entity that entitle the holder to a pro rata share of the profits of the corporation, if any, without preference over any other shareholder or class of shareholders. In the event an issuer is liquidated or declares bankruptcy, the claims of owners of bonds and preferred stock take precedence over the claims of those who own common stock. Common stock usually carries with it the right to vote and frequently, an exclusive right to do so.
DEPOSITARY RECEIPTS
Depositary receipts include American Depositary Receipts (“ADRs”), European Depositary Receipts (“EDRs”), International Depositary Receipts (“IDRs”), and Global Depositary Receipts (“GDRs”). ADRs (sponsored or unsponsored) are receipts typically issued by a U.S. bank or trust company evidencing ownership of the underlying foreign securities. Most ADRs are traded on a U.S. stock exchange. Issuers of unsponsored ADRs are not contractually obligated to disclose material information in the U.S., so there may not be a correlation between such information and the market value of the unsponsored ADR. EDRs and IDRs are receipts typically issued by a European bank or trust company evidencing ownership of the underlying foreign securities. GDRs are receipts issued by either a U.S. or non-U.S. banking institution evidencing ownership of the underlying foreign securities.

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PREFERRED STOCK
Preferred stock generally has a preference as to dividends and upon liquidation over an issuer’s common stock but ranks junior to debt securities in an issuer’s capital structure. Preferred stock generally pays dividends in cash or in additional shares of preferred stock at a defined rate. Unlike interest payments on debt securities, preferred stock dividends are payable only if declared by the issuer’s board of directors. Dividends on preferred stock may be cumulative, meaning that, in the event the issuer fails to make one or more dividend payments on the preferred stock, no dividends may be paid on the issuer’s common stock until all unpaid preferred stock dividends have been paid. Preferred stock also may be subject to optional or mandatory redemption provisions and generally carry no voting rights.
Master Limited Partnerships (“MLPs”)
MLPs may be publicly traded on stock exchanges or markets such as the New York Stock Exchange (“NYSE”), the NYSE Alternext US LLC (“NYSE Alternext”) and NASDAQ. MLPs often own businesses or properties relating to energy, natural resources or real estate, or may be involved in the film industry or research and development activities. Generally, MLPs are operated under the supervision of one or more managing partners or members. Limited partners, unit holders, or members (such as the Fund, if it invests in a partnership) are not involved in the day-to-day management of the company. Limited partners, unit holders, or members are allocated income and capital gains associated with the partnership project in accordance with the terms of the partnership or limited liability company agreement.
At times MLPs may potentially offer relatively high yields compared to common stocks. Because MLPs are generally treated as partnerships or similar limited liability “pass-through” entities for tax purposes, they do not ordinarily pay income taxes, but pass their earnings on to unit holders (except in the case of some publicly-traded firms that may be taxed as corporations). For tax purposes, limited partners, unit holders, or members may be allocated taxable income with respect to only a portion of the distributions attributed to them because certain other portions may be attributed to the repayment of initial investments and may thereby lower the cost basis of the units or shares owned by unit or share holders. As a result, unit holders may effectively defer taxation on the receipt of some distributions until they sell their units. These tax consequences may differ for different types of entities.
Although the high yields potentially offered by these investments may be attractive, MLPs have some disadvantages and present some risks. Investors in a partnership or limited liability company may have fewer protections under state law than investors in a corporation. Distribution and management fees may be substantial. Losses are generally considered passive and cannot offset income other than income or gains relating to the same entity. These tax consequences may differ for different types of entities. Many MLPs may operate in certain limited sectors such as, without limitation, energy, natural resources, and real estate, which may be volatile or subject to periodic downturns, including as a result of geopolitical events. Growth may be limited because most cash is paid out to limited partners, unit holders, or members rather than retained to finance growth. The performance of MLPs may be partly tied to interest rates. Rising interest rates, a poor economy, or weak cash flows are among the factors that can pose significant risks for investments in MLPs. Investments in MLPs also may be illiquid at times.
FOREIGN SECURITIES
Each of Harbor Disruptive Innovation ETF, Harbor Dividend Growth Leaders ETF, Harbor Health Care ETF, Harbor International Compounders ETF, Harbor Long-Term Growers ETF, Harbor Scientific Alpha High-Yield ETF and Harbor Scientific Alpha Income ETF may invest in securities of foreign developed market companies as part of its principal investment strategy. Each of Harbor Disruptive Innovation ETF, Harbor International Compounders ETF, Harbor Long-Term Growers ETF, Harbor Scientific Alpha High-Yield ETF and Harbor Scientific Alpha Income ETF may also invest in emerging market companies as part of its principal investment strategy.
The Advisor and/or Subadvisor, as applicable, is responsible for determining, to the extent relevant with respect to the Fund(s) that it manages, whether a particular issuer would be considered a foreign or emerging market issuer. Normally, foreign or emerging market governments and their agencies and instrumentalities are considered foreign or emerging market issuers, respectively. In the case of non-governmental issuers, the Advisor and/or Subadvisor, as applicable, may consider an issuer to be a foreign or emerging market issuer if:
the company has been classified by MSCI, FTSE, or S&P indices or another major index provider as a foreign or emerging market issuer;
the equity securities of the company principally trade on stock exchanges in one or more foreign or emerging market countries;
a company derives a substantial portion of its total revenue from goods produced, sales made or services performed in one or more foreign or emerging market countries or a substantial portion of its assets are located in one or more foreign or emerging market countries;
the company is organized under the laws of a foreign or emerging market country or its principal executive offices are located in a foreign or emerging market country; and/or

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the Subadvisor and/or Advisor, as applicable, otherwise determines an issuer to be a foreign or emerging market issuer in its discretion based on any other factors relevant to a particular issuer.
Each Subadvisor and/or Advisor, as applicable, may weigh those factors differently when making a classification decision. Because the global nature of many companies can make the classification of those companies difficult and because the Subadvisor(s) does not consult with one another with respect to the management of the Funds, the Subadvisors may, on occasion, classify the same issuer differently. Certain companies that are organized under the laws of a foreign or emerging market country may nevertheless be classified by a Subadvisor and/or Advisor, as applicable, as a domestic issuer. This may occur when the company’s economic fortunes and risks are primarily linked to the U.S. and the company’s principal operations are conducted from the U.S. or when the company’s equity securities trade principally on a U.S. stock exchange.
Foreign Securities Risk
Investing in securities of foreign companies and governments may involve risks which are not ordinarily associated with investing in domestic securities. These risks include changes in currency exchange rates and currency exchange control regulations or other foreign or U.S. laws or restrictions applicable to such investments. A decline in the exchange rate may also reduce the value of certain portfolio securities. Even though the securities are denominated in U.S. dollars, exchange rate changes may adversely affect the company’s operations or financial health.
Fixed commissions on foreign securities exchanges are generally higher than negotiated commissions on U.S. exchanges, although each Fund endeavors to achieve the most favorable net results on portfolio transactions. There is generally less government supervision and regulation of securities exchanges, brokers, dealers and listed companies than in the U.S. Mail service between the U.S. and foreign countries may be slower or less reliable than within the U.S., thus increasing the risk of delayed settlements of portfolio transactions or loss of certificates for portfolio securities. Individual foreign economies may also differ favorably or unfavorably from the U.S. economy in such respects as growth of gross national product, rate of inflation, capital reinvestment, resource self-sufficiency and balance of payments position.
In addition, investments in foreign countries could be affected by other factors generally not thought to be present in the U.S. Such factors include the unavailability of financial information or the difficulty of interpreting financial information prepared under foreign accounting standards; less liquidity and more volatility in foreign securities markets; the possibility of expropriation; the imposition of foreign withholding and other taxes; the impact of political, social or diplomatic developments; limitations on the movement of funds or other assets of a Fund between different countries; difficulties in invoking legal process abroad and enforcing contractual obligations; and the difficulty of assessing economic trends in foreign countries.
Foreign markets also have different clearance and settlement procedures, and in certain markets there have been times when settlements have been unable to keep pace with the volume of securities transactions. These delays in settlement could result in temporary periods when a portion of the assets of a Fund is uninvested and no return is earned thereon. The inability of a Fund to make intended security purchases due to settlement problems could cause a Fund to miss attractive investment opportunities. An inability to dispose of portfolio securities due to settlement problems could result either in losses to a Fund due to subsequent declines in value of the portfolio securities or, if a Fund has entered into a contract to sell the securities, could result in possible liability to the purchaser.
The Funds’ custodian, State Street Bank and Trust Company, has established and monitors subcustodial relationships with banks and certain other financial institutions in the foreign countries in which the Funds may invest to permit the Funds’ assets to be held in those foreign countries. These relationships have been established pursuant to Rule 17f-5 of the Investment Company Act of 1940, which governs the establishment of foreign subcustodial arrangements for funds. The Funds’ subcustodial arrangements may be subject to certain risks including: (i) the inability of the Funds to recover assets in the event of the subcustodian’s bankruptcy; (ii) legal restrictions on the Funds’ ability to recover assets lost while under the care of the subcustodian; (iii) the likelihood of expropriation, confiscation or a freeze of the Funds’ assets; and (iv) difficulties in converting the Funds’ cash and cash equivalents to U.S. dollars. The Advisor and the Subadvisors have evaluated the political risk associated with an investment in a particular country.
Investing in securities of non-U.S. companies may entail additional risks especially in emerging countries due to the potential political and economic instability of certain countries. These risks include expropriation, nationalization, confiscation or the imposition of restrictions on foreign investment and on repatriation of capital invested and the imposition of sanctions. Should one of these events occur, a Fund could lose its entire investment in any such country. A Fund’s investments would similarly be adversely affected by exchange control regulation in any of those countries.
Even though opportunities for investment may exist in foreign countries, any changes in the leadership or policies of the governments of those countries, or in any other government that exercises a significant influence over those countries, may halt the expansion of or reverse the liberalization of foreign investment

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policies and thereby eliminate any investment opportunities that may currently exist. This is particularly true of emerging markets.
Certain countries in which the Funds may invest may have minority groups that advocate religious or revolutionary philosophies or support ethnic independence. Any action on the part of such individuals could carry the potential for destruction or confiscation of property owned by individuals and entities foreign to such country and could cause the loss of a Fund’s investment in those countries.
Certain countries prohibit or impose substantial restrictions on investments in their capital and equity markets by foreign entities like the Funds. Certain countries require governmental approval prior to foreign investments or limit the amount of foreign investment in a particular company or limit the investment to only a specific class of securities of a company that may have less advantageous terms than securities of the company available for purchase by nationals. Moreover, the national policies of certain countries may restrict investment opportunities in issuers or industries deemed sensitive to national interests. In addition, some countries require governmental approval for the repatriation of investment income, capital or the proceeds of securities sales by foreign investors. A Fund could be adversely affected by delays in, or a refusal to grant, any required governmental approval for repatriation, as well as by the application to it of other restrictions on investments. In particular, restrictions on repatriation could make it more difficult for a Fund to obtain cash necessary to satisfy the tax distribution requirements that must be satisfied in order for the Fund to avoid federal income or excise tax.
Global economies and financial markets are becoming increasingly interconnected and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. In January 2020, the United Kingdom withdrew from the EU (referred to as “Brexit”). Brexit has resulted in volatility in European and global markets and could have significant negative impacts on financial markets in the United Kingdom and throughout Europe. Many areas of economic activity were outside the scope of the negotiating mandate and, therefore, the longer term economic, legal, political and social framework to be put in place between the United Kingdom and the EU is still unclear at this stage and is likely to lead to ongoing political and economic uncertainty and periods of exacerbated volatility in both the United Kingdom and in wider European markets for some time. This uncertainty may have an adverse effect on the economy generally and on the value of a Fund’s investments.
Emerging Markets Risk
Each applicable Subadvisor generally considers an instrument to be economically tied to an emerging market country if: the issuer is organized under the laws of an emerging market country; the currency of settlement of the security is a currency of an emerging market country; the security is guaranteed by the government of an emerging market country (or any political subdivision, agency, authority or instrumentality of such government); for an asset-backed or other collateralized security, the country in which the collateral backing the security is located is an emerging market country; or the security’s “country of exposure” is an emerging market country, as determined by the criteria set forth below. With respect to derivative instruments, the Subadvisor generally considers such instruments to be economically tied to emerging market countries if the underlying assets are currencies of emerging market countries (or baskets or indexes of such currencies), or instruments or securities that are issued or guaranteed by governments of emerging market countries or by entities organized under the laws of emerging market countries or if an instrument’s “country of exposure” is an emerging market country. A security’s “country of exposure” is determined by the Subadvisor using certain factors provided by a third-party analytical service provider. The Advisor and/or Subadvisor have broad discretion to identify countries that it considers to qualify as emerging markets. Emerging market countries are generally located in Asia, Africa, the Middle East, Latin America and Eastern Europe.
Investments in emerging markets involve risks in addition to those generally associated with investments in foreign securities.
Political and economic structures in many emerging markets may be undergoing significant evolution and rapid development, and such countries may lack the social, political and economic stability characteristic of more developed countries. As a result, the risks described above relating to investments in foreign securities, including the risks of nationalization or expropriation of assets, would be heightened. In addition, unanticipated political or social developments may affect the values of a Fund’s investments and the availability to the Fund of additional investments in such emerging markets. The small size and inexperience of the securities markets in certain emerging markets and the limited volume of trading in securities in those markets may make a Fund’s investments in such countries less liquid and more volatile than investments in countries with more developed securities markets (such as the U.S., Japan and most Western European countries). In addition, emerging market countries may have more or less government regulation and generally do not impose as extensive and frequent accounting, auditing, financial and other reporting requirements as the securities markets of more developed countries. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect the Advisor’s or a Subadvisor’s ability to evaluate local companies or their potential impact on a Fund’s performance. The imposition of exchange controls (including repatriation restrictions), sanctions, confiscations, trade restrictions

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(including tariffs) and other government restrictions by the U.S. and other governments, or from problems in share registration, settlement or custody, may also result in losses.
In addition, the U.S. and other nations and international organizations may impose economic sanctions or take other actions that may adversely affect issuers located in certain countries. In particular, the U.S. and/or other countries have imposed economic sanctions on certain Russian and Chinese individuals and/or corporate entities.  The U.S. or other countries could also institute additional sanctions on Russia or China. Such sanctions, any future sanctions or other actions, or even the threat of further sanctions or other actions, may negatively affect the value and liquidity of a Fund’s portfolio. For example, a Fund may be prohibited from investing in securities issued by companies subject to such sanctions. In addition, the sanctions may require a Fund to freeze its existing investments in companies located in certain countries, prohibiting the Fund from buying, selling or otherwise transacting in these investments. Countries subject to sanctions may undertake countermeasures or retaliatory actions which may further impair the value and liquidity of a Fund’s portfolio and potentially disrupt its operations. Such events may have an adverse impact on the economies and debts of other emerging markets as well.
As a part of its principal investment strategy, Harbor International Compounders ETF may invest in eligible securities, such as China A-Shares, that are listed and traded on the Shanghai and Shenzhen Stock Exchanges through the China–Hong Kong Stock Connect program.
REAL ESTATE INVESTMENT TRUSTS
Harbor Disruptive Innovation ETF may gain exposure to the real estate sector by investing in real estate investment trusts (“REITs”), and common, preferred and convertible securities of issuers in real estate-related industries. Each of these types of investments are subject, directly or indirectly, to risks associated with ownership of real estate, including changes in the general economic climate or local conditions (such as an oversupply of space or a reduction in demand for space), loss to casualty or condemnation, increases in property taxes and operating expenses, zoning law amendments, changes in interest rates, overbuilding and increased competition, including competition based on rental rates, variations in market value, changes in the financial condition of tenants, changes in operating costs, attractiveness and location of the properties, adverse changes in the real estate markets generally or in specific sectors of the real estate industry and possible environmental liabilities. Real estate-related investments may entail leverage and may be highly volatile.
REITs are pooled investment vehicles that own, and typically operate, income-producing real estate. If a REIT meets certain requirements, including distributing to shareholders substantially all of its taxable income (other than net capital gains), then it is not generally taxed on the income distributed to shareholders. REITs are subject to management fees and other expenses, and so a Fund that invests in REITs will bear its proportionate share of the costs of the REITs’ operations.
Nontraditional real estate carries additional risks. Income expectations may not be met, competitive new supply may emerge, and specialized property may be difficult to sell at its full expected value or require substantial investment before it can be adapted to an alternate use should its original purpose falter.
Along with the risks common to different types of real estate-related securities, REITs, no matter the type, involve additional risk factors. These include poor performance by the REIT’s manager, changes to the tax laws, and failure by the REIT to qualify for tax-free distribution of income or exemption under the Investment Company Act of 1940. Furthermore, REITs are not diversified and are heavily dependent on cash flow.
FIXED INCOME SECURITIES
Fixed income securities, as used generally in this Prospectus, includes:
securities issued or guaranteed by the U.S. government, its agencies or government-sponsored enterprises;
securities issued or guaranteed by a foreign government, governmental entity, supranational organization or government-sponsored enterprise;
corporate debt securities of U.S. and non-U.S. dollar denominated issuers, including convertible securities and corporate commercial paper, issued publicly or through private placements, including Rule 144A securities and Regulation S bonds;
preferred stocks;
when issued or delayed delivery debt securities;
inflation-indexed bonds issued both by governments and corporations;
structured notes, including hybrid or “indexed” securities and event-linked bonds; and
repurchase agreements on fixed income instruments and reverse repurchase agreements on fixed income instruments.
Securities issued by U.S. government agencies or government-sponsored enterprises may not be guaranteed by the U.S. Treasury.

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Certain fixed-income securities may have all types of interest rate payment and reset terms, including fixed rate, adjustable rate, inflation indexed, zero coupon, contingent, deferred, payment in-kind and auction rate features.
Changing interest rates may have unpredictable effect on the markets, may result in heightened market volatility and may detract from Fund performance. In addition, changes in monetary policy may exacerbate the risk associated with changing interest rates. A sudden or unpredictable increase in interest rates may cause volatility in the market and may decrease liquidity in the fixed-income securities markets, making it harder for the Funds to sell their fixed-income investments at an advantageous time. Decreased market liquidity also may make it more difficult to value some or all of a Fund’s fixed-income securities holdings. Certain countries have experienced negative interest rates on certain fixed-income securities. A low or negative interest rate environment may pose additional risks to the Funds because low or negative yields on a Fund’s portfolio holdings may have an adverse impact on a Fund’s ability to provide a positive yield to its shareholders, pay expenses out of Fund assets, or minimize the volatility of the Fund’s net asset value per share. It is difficult to predict the magnitude, timing or direction of interest rate changes and the impact these changes will have on a Fund’s investments and the markets where it trades.
CREDIT QUALITY
Under normal market conditions, Harbor Scientific Alpha High-Yield ETF invests at least 80% of its net assets, plus borrowings for investment purposes, in a portfolio of below investment-grade corporate bonds, commonly referred to as “high yield” or “junk” bonds, or unrated securities that the Subadvisor considers to be of an equivalent credit quality, which may be represented by derivative instruments, including futures and swaps. From time to time, the Harbor Scientific Alpha Income ETF may invest a majority of its assets in below investment-grade corporate bonds, commonly referred to as “high yield” or “junk” bonds, or unrated securities that the Subadvisor considers to be of an equivalent credit quality.
Securities are investment-grade if:
They have a composite rating in the top four long-term rating categories when averaging the ratings of Moody’s, S&P and Fitch.
They have received a comparable short-term or other rating.
They are unrated securities that the Subadvisor believes to be of comparable quality to rated investment-grade securities.
Securities are considered below investment-grade (“junk” bonds) if:
They have a composite rating below one of the top four long-term rating categories when averaging the ratings of Moody’s, S&P and Fitch, or are deemed to be of an equivalent credit quality by the Subadvisor.
They are unrated securities that the Subadvisor believes to be of comparable quality.
A Fund may choose not to sell securities that are downgraded below the Fund’s minimum acceptable credit rating after their purchase. Each Fund’s credit standards also apply to counterparties to over-the-counter derivative contracts or repurchase agreements, as applicable. An issuer, guarantor or counterparty could suffer a rapid decrease in credit quality rating, which would adversely affect the volatility of the value and liquidity of the Fund’s investment. Credit ratings may not be an accurate assessment of liquidity or credit risk.
GOVERNMENT SECURITIES
“Government securities,” as defined under the Investment Company Act of 1940 and interpreted, include securities issued or guaranteed by the United States or certain U.S. government agencies or instrumentalities. There are different types of government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a U.S. government-sponsored entity, such as Federal National Mortgage Association or Federal Home Fixed income securities, as used, although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the U.S. Treasury and are therefore riskier than those that are insured or guaranteed by the U.S. Treasury.
BELOW INVESTMENT-GRADE (“HIGH-YIELD”) RISK
Below investment-grade fixed income securities are considered predominantly speculative by traditional investment standards. In some cases, these securities may be highly speculative and have poor prospects for reaching investment-grade standing. Below investment-grade fixed income securities and unrated securities of comparable credit quality are subject to the increased risk of an issuer’s inability to meet principal and interest obligations. These securities may be subject to greater price volatility due to such factors as corporate developments, interest rate sensitivity, negative perceptions of the high-yield markets generally and limited secondary market liquidity. Such securities are also issued by less-established corporations desiring to expand. Risks associated with acquiring the securities of such issuers generally are greater than is the case with higher rated securities because such issuers are often less creditworthy companies or are highly leveraged and generally less able than more established or less leveraged entities to make scheduled payments of principal and interest.

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The market values of high-yield, fixed income securities tend to reflect individual corporate developments to a greater extent than do those of higher rated securities, which react primarily to fluctuations in the general level of interest rates. Issuers of such high-yield securities may not be able to make use of more traditional methods of financing and their ability to service debt obligations may be more adversely affected than issuers of higher rated securities by economic downturns, specific corporate developments or the issuers’ inability to meet specific projected business forecasts. These below investment-grade securities also tend to be more sensitive to economic conditions than higher-rated securities. Negative publicity about the high-yield bond market and investor perceptions regarding lower rated securities, whether or not based on the Funds’ fundamental analysis, may depress the prices for such securities.
Since investors generally perceive that there are greater risks associated with below investment-grade securities of the type in which the Funds invest, the yields and prices of such securities may tend to fluctuate more than those for higher rated securities. In the lower quality segments of the fixed income securities market, changes in perceptions of issuers’ creditworthiness tend to occur more frequently and in a more pronounced manner than do changes in higher quality segments of the fixed income securities market, resulting in greater yield and price volatility.
Another factor which causes fluctuations in the prices of fixed income securities is the supply and demand for similarly rated securities. In addition, the prices of fixed income securities fluctuate in response to the general level of interest rates. Fluctuations in the prices of portfolio securities subsequent to their acquisition will not affect cash income from such securities but will be reflected in a Fund’s net asset value.
The risk of loss from default for the holders of high-yield, fixed income securities is significantly greater than is the case for holders of other debt securities because such high-yield, fixed income securities are generally unsecured and are often subordinated to the rights of other creditors of the issuers of such securities.
The secondary market for high-yield, fixed income securities is dominated by institutional investors, including mutual fund portfolios, insurance companies and other financial institutions. Accordingly, the secondary market for such securities is not as liquid as and is more volatile than the secondary market for higher rated securities. In addition, the trading volume for high-yield, fixed income securities is generally lower than that of higher rated securities and the secondary market for high-yield, fixed income securities could contract under adverse market or economic conditions independent of any specific adverse changes in the condition of a particular issuer. These factors may have an adverse effect on a Fund’s ability to dispose of particular portfolio investments. Prices realized upon the sale of such lower rated or unrated securities, under these circumstances, may be less than the prices used in calculating a Fund’s net asset value. A less liquid secondary market may also make it more difficult for a Fund to obtain precise valuations of the high-yield securities in its portfolio.
Federal legislation could adversely affect the secondary market for high-yield securities and the financial condition of issuers of these securities. The form of any proposed legislation and the probability of such legislation being enacted is uncertain.
Below investment-grade or high-yield, fixed income securities also present risks based on payment expectations. High-yield, fixed income securities frequently contain “call” or “buy-back” features, which permit the issuer to call or repurchase the security from its holder. If an issuer exercises such a “call option” and redeems the security, a Fund may have to replace such security with a lower yielding security, resulting in a decreased return for investors. A Fund may also incur additional expenses to the extent that it is required to seek recovery upon default in the payment of principal or interest on a portfolio security.
Credit ratings issued by credit rating agencies are designed to evaluate the safety of principal and interest payments of rated securities. They do not, however, evaluate the market value risk of below investment-grade securities and, therefore, may not fully reflect the true risks of an investment. In addition, credit rating agencies may or may not make timely changes in a rating to reflect changes in the economy or in the conditions of the issuer that affect the market value of the security. Consequently, credit ratings are used only as preliminary indicators of investment quality. Investments in below investment-grade and comparable unrated obligations will be more dependent on the Subadvisor’s credit analysis than would be the case with investments in investment-grade debt obligations. The Subadvisors employ their own credit research and analysis, which may include a study of an issuer’s existing debt, capital structure, ability to service debt and to pay dividends, the issuer’s sensitivity to economic conditions, its operating history and the current trend of earnings. The Subadvisors continually monitor the investments in each Fund’s portfolio and evaluate whether to dispose of or to retain below investment-grade and comparable unrated securities whose credit quality may have changed.
There are special tax considerations associated with investing in bonds, including high-yield bonds, structured as zero coupon or payment-in-kind securities. For example, a Fund is required to report the accrued interest on these securities as current income each year even though it may receive no cash interest until the security’s maturity or payment date. The Fund may be required to sell some of its assets to obtain

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cash to distribute to shareholders in order to satisfy the distribution requirements of the Internal Revenue Code of 1986, as amended (the “Code”), with respect to such accrued interest. These actions are likely to reduce the Fund’s assets and may thereby increase its expense ratio and decrease its rate of return.
DERIVATIVE INSTRUMENTS
As part of its principal investment strategy, each of Harbor Scientific Alpha High-Yield ETF and Harbor Scientific Alpha Income ETF may use derivatives for any of the following purposes:
To hedge against adverse changes in the market value of securities held by or to be bought for the Fund. These changes may be caused by changing interest rates, stock market prices or currency exchange rates.
As a substitute for purchasing or selling securities or foreign currencies.
In non-hedging situations, to attempt to profit from anticipated market developments.
In general, a derivative instrument will obligate or entitle a Fund to deliver or receive an asset or a cash payment that is based on the change in value of a designated security, index, or other asset. Examples of derivatives are futures contracts, options, forward contracts, hybrid instruments, swaps, caps, collars and floors.
Harbor Commodity All-Weather Strategy ETF and Harbor Energy Transition Strategy ETF seeks to gain exposure to the commodity markets primarily through investments in excess return swaps. Excess return swaps are derivative contracts between two parties who exchange the excess return from a financial asset between them. One party (the Fund or the Subsidiary) makes payments based on a set rate. The counterparty makes payments based on the return of an underlying asset, in this case the basket of futures designed to track the Index.
These swaps expose each Fund economically to movements in commodity prices. The Fund benefits from any increase in the value of the Index but is liable to the counterparty in the event that the value of the Index declines. Each Fund’s investments in swaps are leveraged, which means that the Fund receives the return on the Index at less cost than purchasing the underlying securities or other financial instruments of the Index. This has the effect of increasing the volatility of each swap’s value relative to changes in the Index. The use of excess return swaps exposes each Fund to counterparty risk (the risk that the other party in the swap contract may default on its contractual obligations).
Each Fund may invest in commodity futures contracts or other commodity-linked derivatives if it at any time it is impractical or inefficient to gain full or partial exposure to a commodity through the use of excess return swaps, including on a different commodity (including commodities not included in the Index) that the Subadvisor reasonably believes will help the Fund achieve its investment objective.
Derivatives Risk
Even a small investment in certain types of derivatives can have a big impact on a Fund’s portfolio interest rate, stock market or currency exposure. Therefore, using derivatives can disproportionately increase a Fund’s portfolio losses and reduce opportunities for gains when interest rates, stock prices or currency rates are changing. A Fund may not fully benefit from or may lose money on derivatives if changes in their value do not correspond as expected to changes in the value of the Fund’s portfolio holdings.
To the extent a Fund uses derivative instruments to attempt to hedge certain exposures or risks, there can be no assurance that the Fund’s hedging will be effective. In addition, use of derivative instruments for hedging involves costs and may reduce gains or result in losses, which may adversely affect a Fund.
Counterparties to over-the-counter derivative contracts present the same types of credit risk as issuers of fixed income securities. Derivatives also can make a Fund’s portfolio less liquid and harder to value, especially in declining markets. In addition, government legislation or regulation may make derivatives more costly, may limit the availability of derivatives, or may otherwise adversely affect the use, value or performance of derivatives.
Credit default swaps are typically two-party financial contracts that transfer credit exposure between the two parties. The “buyer” in a credit default contract is obligated to pay the “seller” a periodic stream of payments over the term of the contract provided that no event of default on an underlying reference obligation has occurred. If an event of default occurs, the seller must pay the buyer the full notional value, or “par value,” of the reference obligation in exchange for the reference obligation or the net cash-settlement amount. Credit default swap transactions involve greater risks than if a Fund had invested in the reference obligation directly.
A futures contract may generally be described as an agreement between two parties to buy and sell particular financial instruments, currencies, commodities or indices for an agreed price for a designated period (or to deliver the final cash settlement price, in the case of a contract relating to an index or otherwise not calling for physical delivery at the end of trading in the contract). With respect to U.S. Treasury futures, one party to the contract agrees to accept, and the other party agrees to make delivery of, a U.S. Treasury

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Additional Information about the Funds' Investments
security, as called for in the agreement, at a specified date and at an agreed upon price. Transactions in futures contracts, including U.S. Treasury futures, involve brokerage costs and require margin deposits.
While transactions in futures contracts may reduce certain risks, these transactions themselves entail certain other risks. For example, unanticipated changes in interest rates, securities prices or currency exchange rates, among other things, may result in a poorer overall performance for a Fund than if it had not entered into any futures contracts transactions.
Emissions-Related Credits
Harbor Energy Transition Strategy ETF may invest in emissions-related credit futures. Emissions-related credits operate as part of an allowance regime. A limit is typically set by a regulator, such as a government entity or supranational organization, on the total amount of specific greenhouse gases that can be emitted by regulated entities, such as manufacturers or energy producers. The regulator then issues or sells “emission allowances” to regulated entities which may then buy or sell the emission allowances on the open market. To the extent that the regulator may then reduce the limit on emission allowances, regulated entities are thereby incentivized to reduce their emissions. Otherwise, such regulated entities must purchase emission allowances on the open market, where the price of such allowances will likely be increasing as a result of demand. Regulated entities that reduce their emissions will be able to sell unneeded emission allowances for profit.
There is no assurance that the current regulatory allowance regimes will continue to exist or that they will be an effective method of reduction in the emissions of greenhouse gases. Certain factors may arise, such as new technologies or alternative government policies aimed at reducing emissions, that may diminish or eliminate the need for emission allowance markets. Ultimately, the cost of emissions credits is determined by the cost of actually reducing emissions levels. If the price of the credits becomes too high, it will be more economical for companies to develop or invest in green technologies, thereby suppressing the demand for credits, which may have an adverse impact on the Fund’s investments. In addition, new regulations could have an adverse effect on the value and liquidity of the emissions-related credit market, impacting the overall performance of the Fund.
NON-DIVERSIFICATION RISK
Each of Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF), Harbor Energy Transition Strategy ETF, Harbor Health Care ETF, Harbor International Compounders ETF and Harbor Long-Term Growers ETF is classified as non-diversified, meaning that it may invest a greater percentage of its assets in securities of a single issuer, and/or invest in relatively small number of issuers. As a result, the Fund may be more susceptible to the risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio. Some of these issuers may also present substantial credit or other risks.
ESG INTEGRATION
As stated in the Fund Summary, the Subadvisors for certain Funds incorporate environmental, social and/or governance (“ESG”) considerations in ther investment processes. As applicable, a Subadvisor’s incorporation of ESG considerations in its investment process may cause it to make different investments for the Fund than funds that have a similar investment universe and/or investment style but that do not incorporate such considerations in their investment strategy or processes. As a result, the Fund may perform differently from funds that do not use such considerations. Additionally, the Fund’s relative investment performance may be affected depending on whether such investments are in or out of favor with the market.
A Subadvisor is dependent on available information to assist in the evaluation process, and, because there are few generally accepted standards to use in evaluation, the process employed for the Fund may differ from processes employed for other funds. When integrating ESG factors into the investment process, a Subadvisor may rely on third-party data that it believes to be reliable, but it does not guarantee the accuracy of such third-party data. ESG information from third-party data providers may be incomplete, inaccurate or unavailable, which may adversely impact the investment process.
A Fund may seek to identify companies that reflect certain ESG considerations, but investors may differ in their views of what constitutes positive or negative ESG-related outcomes. As a result, the Fund may invest in companies that do not reflect the beliefs and values of any particular investor.
The ESG factors that may be evaluated as part of a Subadvisor’s investment process are anticipated to evolve over time and one or more characteristics may not be relevant with respect to all issuers that are eligible for investment. Further, the regulatory landscape with respect to ESG integration in the United States is still developing and future rules and regulations may require a Fund to modify or alter its investment process with respect to ESG integration.
OPERATIONAL RISKS
An investment in a Fund, like any fund, can involve operational risks arising from factors such as processing errors, inadequate or failed processes, failure in systems and technology, cybersecurity breaches, changes

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Additional Information about the Funds' Investments
in personnel and errors caused by third-party service providers. These errors or failures as well as other technological issues may adversely affect a Fund’s ability to calculate its net asset value in a timely manner, including over a potentially extended period, or may otherwise adversely affect a Fund and its shareholders. While each Fund seeks to minimize such events through controls and oversight, there may still be failures that could causes losses to a Fund. In addition, similar incidents affecting issuers of securities held by a Fund may negatively impact Fund performance.

Investments in the Wholly Owned Subsidiary
Investments in the Subsidiary are expected to provide Harbor Commodity All-Weather Strategy ETF and Harbor Energy Transition Strategy ETF with exposure to the commodity markets within the limitations of Subchapter M of the Internal Revenue Code (the “Code”), as discussed under “Dividends, Distributions and Taxes — A Note on Harbor Commodity All-Weather Strategy ETF and Harbor Energy Transition Strategy ETF.”
The Subsidiary invests primarily in commodity-linked derivative instruments, including swap agreements, commodity options, futures and options on futures. Although Harbor Commodity All-Weather Strategy ETF and Harbor Energy Transition Strategy ETF may enter into these commodity-linked derivative instruments directly, subject to certain limitations, the Fund likely will gain exposure to these derivative instruments indirectly by investing in the Subsidiary. The Subsidiary also invests in U.S. Treasury securities, cash, and money market funds, which are intended to serve as margin or collateral for the Subsidiary’s derivatives positions. Harbor Commodity All-Weather Strategy ETF and Harbor Energy Transition Strategy ETF invests in the Subsidiary and is subject to the risks associated with those derivative instruments and other securities, which are discussed elsewhere in this Prospectus, as if the Fund were investing in those derivative instruments and other securities directly rather than through the Subsidiary.
The Subsidiary is not registered under the Investment Company Act and, unless otherwise noted in this Prospectus, is not subject to all of the investor protections of the Investment Company Act. However, the Subsidiary has adopted the same investment objective and substantially the same investment policies and restrictions as the Fund, except that the Subsidiary may invest without limit in commodity-linked derivative instruments. The Fund wholly owns and controls the Subsidiary, and both the Fund and the Subsidiary have the same investment adviser and Subadvisor. In addition, the Fund complies with the provisions of the Investment Company Act governing investment policies (Section 8) and capital structure and leverage on an aggregate basis with the Subsidiary. The Subsidiary will comply with the provisions of the Investment Company Act pertaining to affiliated transactions and custody.
Because the Subsidiary is organized under the laws of the Cayman Islands, the Subsidiary is subject to the risk that changes in those laws could adversely affect the Subsidiary’s ability to operate in the manner described in this Prospectus and Statement of Additional Information which, in turn, would adversely affect Harbor Commodity All-Weather Strategy ETF and Harbor Energy Transition Strategy ETF. Similarly, changes in the laws of the United States, including tax laws, could restrict Harbor Commodity All-Weather Strategy ETF and Harbor Energy Transition Strategy ETF’s ability to invest in the Subsidiary in such a manner and to such a degree that the Fund would no longer be able to gain sufficient exposure to the commodities market to implement its investment strategy.

Non-Principal Investments
In addition to the investment strategies described in this Prospectus, the Fund may also make other types of investments, and, therefore, may be subject to other risks.  For additional information about the Fund, its investments and related risks, please see the Funds’ Statement of Additional Information.
TEMPORARY DEFENSIVE POSITIONS
Each Fund (except Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF), Harbor Corporate Culture ETF, Harbor Corporate Culture Leaders ETF and Harbor Energy Transition Strategy ETF) may temporarily depart from its normal investment policies and strategies when the Subadvisor and/or Advisor, as applicable, believes that doing so is in the Fund’s best interest, so long as the strategy or policy employed is consistent with the Fund’s investment objective. For instance, a Fund may invest beyond its normal limits (if applicable) in derivatives or exchange traded funds that are consistent with the Fund’s investment objective when those instruments are more favorably priced or provide needed liquidity, as might be the case if the Fund is transitioning assets from one Subadvisor to another or receives large cash flows that it cannot prudently invest immediately.
In addition, a Fund may take temporary defensive positions that are inconsistent with its normal investment policies and strategies—for instance, by allocating substantial assets to cash equivalent investments or other less volatile instruments—in response to adverse or unusual market, economic, political, or other conditions. In doing so, the Fund may succeed in avoiding losses but may otherwise fail to achieve its investment objective.

63

Additional Information about the Funds' Investments
Exchange-Traded Fund Structure
Shares can be purchased and redeemed directly from a Fund at NAV only by authorized participants in large increments (Creation Units). A Fund’s shares are listed on an exchange and can be bought and sold in the secondary market at market prices. The market price of a Fund’s shares, like other exchange-traded securities, may include a “bid-ask spread” (the difference between the price at which investors are willing to buy shares and the price at which investors are willing to sell shares). A Fund’s market price per share will generally fluctuate with changes in the market value of the Fund’s portfolio holdings and as a result of the supply and demand for shares of the Fund on the listing exchange.
There is no guarantee that a Fund will be able to attract market makers and authorized participants. Market makers and authorized participants are not obligated to make a market in a Fund’s shares or to engage in purchase or redemption transactions. Decisions by market makers or authorized participants to reduce their role with respect to market making or creation and redemption activities during times of market stress, or a decline in the number of authorized participants due to decisions to exit the business, bankruptcy, or other factors, could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying value of a Fund’s portfolio holdings and the market price of Fund shares. To the extent no other authorized participants are able to step forward to create or redeem, shares may trade at a discount to NAV and possibly face delisting. The authorized participant concentration risk may be heightened during market disruptions or periods of market volatility and in scenarios where authorized participants have limited or diminished access to the capital required to post collateral.
Investors may sustain losses if they pay more than a Fund’s NAV per share when purchasing shares or receive less than the Fund’s NAV per share when selling shares in the secondary market. In addition, trading of shares of the Funds in the secondary market may be halted, for example, due to activation of marketwide “circuit breakers.” If trading halts or an unanticipated early closing of the listing exchange occurs, an investor may be unable to purchase or sell shares of a Fund. Shares of the Funds, similar to shares of other issuers listed on a stock exchange, may be sold short and are therefore also subject to the risk of increased volatility and price decreases associated with being sold short. There are various methods by which investors can purchase and sell shares and various orders that may be placed. Investors should consult their financial intermediary before purchasing or selling shares of a Fund.
Certain accounts or Advisor affiliates, including other funds advised by the Advisor or third parties, may from time to time own (beneficially or of record) or control a substantial amount of a Fund’s shares, including through seed capital arrangements. Such shareholders may at times be considered to control a Fund. Dispositions of a large number of shares of a Fund by these shareholders may adversely affect the Fund’s liquidity and net assets to the extent such transactions are executed directly with the Fund in the form of redemptions through an authorized participant, rather than executed in the secondary market. These redemptions may also force a Fund to sell securities, which may increase the Fund’s brokerage costs. To the extent these large shareholders transact in shares of a Fund on the secondary market, such transactions may account for a large percentage of the trading volume on the listing exchange and may, therefore, have a material effect (upward or downward), on the market price of the Fund’s shares.

Portfolio Turnover
Except for Harbor Scientific Alpha Income ETF and Harbor Scientific Alpha High-Yield ETF, the Funds do not expect to, but may engage in, frequent trading to achieve their principal investment strategies. Active and frequent trading in a Fund’s portfolio may lead to the realization and distribution to shareholders of higher capital gains, which would increase the shareholders’ tax liability. Frequent trading also increases transaction costs, which could detract from the Fund’s performance. A portfolio turnover rate greater than 100% would indicate that a Fund sold and replaced the entire value of its securities holdings during the previous one-year period. Although the higher turnover rate results in higher transaction costs and other expenses for the Fund, the Subadvisor believes that the portfolio transactions are in the best interests of shareholders.

Portfolio Holdings Disclosure Policy
A full list of Fund holdings will be provided on harborcapital.com on each business day prior to the opening of regular trading on the listing exchange.
Additional information about Harbor ETF Trust’s portfolio holdings disclosure policy is available in the Statement of Additional Information.

64

The Advisor
Harbor Capital Advisors, Inc.
Harbor Capital Advisors, Inc. (“Harbor Capital” or the “Advisor”) is the investment adviser to Harbor ETF Trust. The Advisor, located at 111 South Wacker Drive, 34th Floor, Chicago, Illinois 60606-4302, is a wholly owned subsidiary of ORIX Corporation (“ORIX”), a global financial services company based in Tokyo, Japan. ORIX provides a range of financial services to corporate and retail customers around the world, including financing, leasing, real estate and investment banking services. The stock of ORIX trades publicly on both the New York (through American Depositary Receipts) and Tokyo Stock Exchanges.
The combined assets of Harbor ETF Trust and the other products managed by the Advisor were approximately $38.3 billion as of December 31, 2022.
The Advisor may manage funds directly or employ a “manager-of-managers” approach in selecting and overseeing investment subadvisers (each, a “Subadvisor”). The Advisor makes day-to-day investment decisions with respect to each fund that it directly manages. In the case of subadvised funds, the Advisor evaluates and allocates each Harbor fund’s assets to one or more Subadvisors. For Harbor funds that employ one or more discretionary subadvisors, the Subadvisors are responsible for the day-to-day management of the assets of the Harbor funds allocated to them. For Harbor funds that employ one or more non-discretionary Subadvisors, the Advisor will make day-to-day investment decisions with respect to each such fund to implement model portfolios provided by the non-discretionary Subadvisors. Subject to the approval of the Board of Trustees, the Advisor establishes, and may modify whenever deemed appropriate, the investment strategy of each Fund. The Advisor also is responsible for overseeing each Subadvisor and recommending the selection, termination and replacement of Subadvisors.
The Advisor also:
Seeks to ensure quality control in the Subadvisor’s investment process with the objective of adding value compared with returns of an appropriate risk and return benchmark or tracking an index, as applicable.
Monitors and measures risk and return results against appropriate benchmarks and recommends whether a Subadvisor should be retained or changed.
Focuses on cost control.
In order to more effectively manage the Funds, Harbor Funds and the Advisor have been granted an order from the Securities and Exchange Commission (“SEC”), which extends to Harbor ETF Trust,  permitting the Advisor, subject to the approval of the Board of Trustees, to select Subadvisors not affiliated with the Advisor to serve as portfolio managers for the Harbor funds, and to enter into new subadvisory agreements and to materially modify existing subadvisory agreements with such unaffiliated subadvisors, all without obtaining shareholder approval.
In addition to its investment management services, the Advisor administers Harbor ETF Trust’s business affairs. Pursuant to the Investment Advisory Agreement between the Trust and the Advisor with respect to each Fund, and subject to the general supervision of the Board of Trustees, the Advisor provides or causes to be furnished, all supervisory and other services reasonably necessary for the operation of each Fund and also bears the costs of various third-party services required by the Funds, including administration, certain custody, audit, legal, transfer agency, and printing costs. The Advisor pays all other expenses of the Fund except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under each Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; (viii) any gains or losses attributable to investments under a deferred compensation plan for Trustees who are not “interested persons” of the Trust; and (ix) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business. The Actual Advisory Fee Paid, as shown in the table below, is for the fiscal year ended October 31, 2022. The Advisor pays a subadvisory fee to each Subadvisor out of its own assets. The Funds are not responsible for paying any portion of the subadvisory fee to the Subadvisor.

65

The Advisor
Annual Advisory Fee Rates
(annual rate based on the Fund’s average net assets)
 
Actual
Advisory
Fee Paid
Contractual
Advisory
Fee
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather
Inflation Focus ETF)1
0.68%
0.68%
Harbor Corporate Culture ETF2
0.35
0.35
Harbor Corporate Culture Leaders ETF3
0.50
0.50
Harbor Disruptive Innovation ETF4
0.55
0.75
Harbor Dividend Growth Leaders ETF5
0.50
0.50
Harbor Energy Transition Strategy ETF6
0.80
0.80
Harbor Health Care ETF7
N/A
0.80
Harbor International Compounders ETF8
0.55
0.55
Harbor Long-Term Growers ETF9
0.57
0.57
Harbor Scientific Alpha High-Yield ETF
0.48
0.48
Harbor Scientific Alpha Income ETF
0.50
0.50
1
Commenced operations on February 9, 2022.
2
Commenced operations on October 12, 2022.
3
Commenced operations on February 23, 2022.
4
For the period of December 1, 2021 through August 31, 2022, the Advisor voluntarily waived a portion of its management fees to limit the Fund’s expenses to 0.50%.
5
On May 20, 2022, the Westfield Capital Dividend Growth Fund was reorganized into the Harbor Dividend Growth Leaders ETF. Information shown is for the period of operations following reorganization.
6
Commenced operations on July 13, 2022.
7
Commenced operations on November 16, 2022.
8
Commenced operations on September 7, 2022.
9
Commenced operations on February 2 2022.
A discussion of the factors considered by the Board of Trustees when approving the investment advisory agreements and investment subadvisory agreements (if applicable) for Harbor Corporate Culture Leaders ETF, Harbor Dividend Growth Leaders ETF, Harbor Energy Transition Strategy ETF and Harbor International Compounders ETF is available in the Funds’ annual report to shareholders dated October 31, 2022. A discussion of the factors considered by the Board of Trustees when approving the investment advisory agreements and investment subadvisory agreements (if applicable) for Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF), Harbor Corporate Culture Leaders ETF, Harbor Disruptive Innovation ETF and Harbor Long-Term Growers ETF is available in the Fund’s semi-annual report to shareholders for the six-month period ending April 30, 2022. A discussion of the factors considered by the Board of Trustees when approving the investment advisory and investment subadvisory agreements for Harbor Health Care ETF, Harbor Scientific Alpha High-Yield ETF and Harbor Scientific Alpha Income ETF will be available in the Funds’ next semi-annual report to shareholders.
From time to time, the Advisor or its affiliates may invest “seed” capital in a Fund, typically to enable a Fund to commence investment operations and/or achieve sufficient scale. The Advisor and its affiliates may hedge such seed capital exposure by investing in derivatives or other instruments expected to produce offsetting exposure. Such hedging transactions, if any, would occur outside of a Fund.

Portfolio Management
The Statement of Additional Information provides additional information about each portfolio manager’s compensation, other accounts managed by each portfolio manager and each portfolio manager’s ownership of shares in the Funds.

66

The Advisor
Harbor Corporate Culture ETF
Harbor Capital Advisors, Inc., located at 111 S. Wacker Drive, 34th Floor, Chicago, IL 60606, serves as investment adviser to Harbor Corporate Culture ETF. The portfolio managers are jointly responsible for the day-to-day investment decision making for the Fund.
PORTFOLIO MANAGER
SINCE
PROFESSIONAL EXPERIENCE
Stephen Cook
2022
Mr. Cook joined Harbor Capital in 2021 as Managing Director,
ETFs. Prior to joining Harbor Capital, Mr. Cook was a Senior
Vice President, Global Services Client Operations at State Street
Corporation. Before State Street, Mr. Cook spent 20 years at
BNY Mellon, most recently as Managing Director and COO
Global Structured Funds. Mr. Cook began his investment career
in 1996.
James Erceg
2022
Mr. Erceg joined Harbor Capital in 2019 as Executive Vice
President and Head of Product. Prior to joining Harbor Capital,
Mr. Erceg held multiple product roles during his 12 years at
T.Rowe Price & Associates, most recently as Head of Product
Strategy and Channel Management for North America. Prior
to T. Rowe Price, Mr. Erceg was a Director of Product at Ryder
Capital Partners. Mr. Erceg began his investment career in 1995.
Harbor Corporate Culture Leaders ETF
Harbor Capital Advisors, Inc., located at 111 S. Wacker Drive, 34th Floor, Chicago, IL 60606, serves as investment adviser to Harbor Corporate Culture Leaders ETF. The portfolio managers are jointly responsible for the day-to-day investment decision making for the Fund.
PORTFOLIO MANAGER
SINCE
PROFESSIONAL EXPERIENCE
Stephen Cook
2022
Mr. Cook joined Harbor Capital in 2021 as Managing Director,
ETFs. Prior to joining Harbor Capital, Mr. Cook was a Senior
Vice President, Global Services Client Operations at State Street
Corporation. Before State Street, Mr. Cook spent 20 years at
BNY Mellon, most recently as Managing Director and COO
Global Structured Funds. Mr. Cook began his investment career
in 1996.
James Erceg
2022
Mr. Erceg joined Harbor Capital in 2019 as Executive Vice
President and Head of Product. Prior to joining Harbor Capital,
Mr. Erceg held multiple product roles during his 12 years at
T.Rowe Price & Associates, most recently as Head of Product
Strategy and Channel Management for North America. Prior
to T. Rowe Price, Mr. Erceg was a Director of Product at Ryder
Capital Partners. Mr. Erceg began his investment career in 1995.
Harbor Disruptive Innovation ETF
Harbor Capital Advisors, Inc. (“Harbor Capital”), located at 111 S. Wacker Drive, 34th Floor, Chicago, IL 60606, serves as investment adviser to Harbor Disruptive Innovation ETF. The portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.

67

The Advisor
Harbor Disruptive Innovation ETF — continued
Harbor Capital manages the Fund’s assets based upon model portfolios provided by multiple non-discretionary Subadvisors.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Spenser P. Lerner, CFA
2021
Mr. Lerner joined Harbor Capital in 2020 and is the Head of
Multi-Asset Solutions, a Managing Director and Portfolio
Manager. Prior to joining Harbor Capital, Mr. Lerner was a
Vice President of Equity and Quantitative Investment Research
and Equity Manager Research for JP Morgan Asset Management.
Before that, he worked as a Research, Portfolio Management
and Quantitative Investment Strategy Associate for JP Morgan
Asset Management. Mr. Lerner began his investment career in
2009.
Kristof Gleich, CFA
2021
Mr. Gleich joined Harbor Capital in 2018 and is President &
CIO. Prior to joining Harbor Capital, Mr. Gleich was a Managing
Director and Global Head of Manager Selection at JP Morgan
Chase & Co. Before that, he served as a fund manager with
Architas. Mr. Gleich began his investment career in 2004.

68

The Subadvisors
Model Portfolio Providers

Harbor Disruptive Innovation ETF
Each of the Subadvisors below provides a model portfolio to the Advisor, which the Advisor implements at its discretion with respect to a portion of the assets of the Fund. The Advisor is responsible for the day-to-day investment decision making for Harbor Disruptive Innovation ETF.
4BIO Partners LLP, located at 78 Pall Mall, London SW1Y 5ES, United Kingdom
NZS Capital, LLC, located at 1437 Larimer Street, Suite 200, Denver CO 80202
Sands Capital Management, LLC, located at 1000 Wilson Boulevard, Suite 3000, Arlington, VA 22209
Tekne Capital Management, LLC, located at 509 Madison Avenue, New York, NY 10022
Westfield Capital Management Company, L.P., located at One Financial Center, 23rd Floor, Boston, MA 02111
Portfolio Management
The Statement of Additional Information provides additional information about each portfolio manager’s compensation, other accounts managed by each portfolio manager and each portfolio manager’s ownership of shares in the Funds.
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF)
Quantix Commodities LP, located at 16 Old Track Road, Suite A, Greenwich, CT 06830, serves as Subadvisor to Harbor Commodity All-Weather Strategy ETF. The portfolio manager is primarily responsible for the day-to-day investment decision making for the Fund.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Matthew Schwab
2022
Mr. Schwab joined Quantix in 2021 as Head of Investor Solutions.
Prior to joining Quantix, Mr. Schwab was a Managing Director
and co-head of Research, Portfolio Management and Portfolio
Construction for the Alternative Investment Strategies group
within Quantitative Investment Strategies at Goldman Sachs.
Prior to that, he was Global Head of Systematic Trading in the
Securities Division for Goldman Sachs. Mr. Schwab began his
investment career in 1993.
Harbor Dividend Growth Leaders ETF
Westfield Capital Management Company, L.P. (“Westfield”), located at One Financial Center, 23rd Floor, Boston, MA 02111, serves as Subadvisor to Harbor Dividend Growth Leaders ETF. The portfolio manager is primarily responsible for the day-to-day investment decision making for the Fund.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
William A. Muggia
2022
Mr. Muggia served as Portfolio Manager of the Predecessor Fund
from 2013-2022. Mr. Muggia joined Westfield in 1994 and is
the Chief Executive Officer, President, and Chief Investment
Officer leading the Investment Committee. Prior to joining
Westfield, he worked in the Technology Investment Banking
Group at Alex Brown & Sons, where his responsibilities included
mergers and acquisitions, restructuring, and spin-offs. Before
that, he was a Vice President at Kidder, Peabody & Company.
Mr. Muggia began his investment career in 1983.

69

The Subadvisors
Harbor Energy Transition Strategy ETF
Quantix Commodities LP, located at 16 Old Track Road, Suite A, Greenwich, CT 06830, serves as Subadvisor to Harbor Energy Transition Strategy ETF. The portfolio manager is primarily responsible for the day-to-day investment decision making for the Fund.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Matthew Schwab
2022
Mr. Schwab joined Quantix in 2021 as Head of Investor Solutions.
Prior to joining Quantix, Mr. Schwab was a Managing Director
and co-head of Research, Portfolio Management and Portfolio
Construction for the Alternative Investment Strategies group
within Quantitative Investment Strategies at Goldman Sachs.
Prior to that, he was Global Head of Systematic Trading in the
Securities Division for Goldman Sachs. Mr. Schwab began his
investment career in 1993.
Harbor International Compounders ETF
C WorldWide Asset Management Fondsmaeglerselskab A/S (“C WorldWide”), located at Dampfaergevej 26 DK-2100 Copenhagen Denmark, serves as Subadvisor to Harbor International Compounders ETF. The portfolio managers are jointly and primarily responsible for the day-to-day portfolio management of the Fund.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Bo Almar Knudsen
2022
Mr. Knudsen serves as CEO of the Subadvisor and as Portfolio
Manager for the Fund. He has worked with global equities
portfolio management since 1989, including five years at Danske
Bank. Mr. Knudsen was a member of AIMR (CFA)’s global IPC
committee from 1998-2002 and served as the chair of the Danish
Society of Financial Analysts and CFA Denmark from 2002-2008.
He holds an MSc (Econ) in Finance from Aarhus School of
Business supplemented with MBA courses from San Francisco
State University. He has been employed by the Subadvisor since
1994 with the exception of a period between 1998-2001 where
he worked as Head of Equities at Nordea Investment
Management.
Bengt Seger
2022
Mr. Seger serves as Portfolio Manager for the Fund. Mr. Seger
has previously worked as an Analyst and Portfolio Manager
at Sparbanken Skåne, and as a Senior Analyst in international
equites at Carnegie Investment Bank. He holds a Master’s in
Law and has studied Business Administration and Economics
at the University of Lund. He has been employed by the
Subadvisor since 1988.
Peter O’Reilly
2022
Mr. O’Reilly serves as Portfolio Manager for the Fund. He has
previously worked as Head of Global Equities at Investors Group
where he was responsible for managing the firm’s global equity
portfolios. He has also held investment roles at Royal and Sun
Alliance Asset London, Global Asset Management and AIB
Investment Managers. He holds a BA and MA in Economics
from University College Dublin and is a member of the UK Society
of Investment Professionals (CFA). He has been employed by
the Subadvisor since 2018.
Mattias Kolm
2022
Mr. Kolm serves as Portfolio Manager for the Fund. He has
previously worked in Svedala Industri’s finance department where
he primarily dealt with cash flow hedging, and at Skandinaviska
Enskilda Banken as a Portfolio Manager. He holds an MSc BA
from the University of Lund and has supplemented his degree
with studies in finance at Stockholm School of Economics. He
has been employed by the Subadvisor since 2003.

70

The Subadvisors
Harbor Health Care ETF
Westfield Capital Management Company, L.P. (“Westfield”), located at One Financial Center, 23rd Floor, Boston, MA 02111, serves as Subadvisor to Harbor Health Care ETF. The portfolio managers are primarily responsible for the day-to-day investment decision making of the Fund.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
William A. Muggia
2022
Mr. Muggia joined Westfield in 1994 and is the Chief Executive
Officer, President, and Chief Investment Officer leading the
Investment Committee. Prior to joining Westfield, he worked
in the Technology Investment Banking Group at Alex Brown
& Sons, where his responsibilities included mergers and
acquisitions, restructuring, and spin-offs. Before that, he was
a Vice President at Kidder, Peabody & Company. Mr. Muggia
began his investment career in 1983.
Matthew R. Renna
2022
Mr. Renna joined Westfield in 2013 as a member of the Investment
Committee covering the Health Care sector. Prior to joining
Westfield, he was with Vinik Asset Management as a Health
Care Portfolio Manager. His professional experience also includes
Director, SMID Growth Equity team at BlackRock, Inc., Senior
Equity Analyst at RA Capital Management and Director,
Healthcare/Biotechnology at Soleil Securities Corporation,
Neponset Equity Research. Matthew began his career in the
Health Care industry at Merck & Co., before entering equity
research as a Senior Research Associate covering Specialty
Pharmaceuticals at Leerink Swann LLC. Mr. Renna began his
investment career in 2004.
Harbor Long-Term Growers ETF
Jennison Associates LLC (“Jennison”), located at 466 Lexington Avenue, New York, NY 10017, serves as Subadvisor to the Fund. The Fund’s portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund.
The portfolio managers for the Fund are supported by other Jennison portfolio managers, research analysts and investment professionals. Team members conduct research, make securities recommendations and support the portfolio managers in all activities.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Blair A. Boyer
2022
Mr. Boyer joined Jennison in 1993 and serves as Managing
Director, Co-Head of Large Cap Growth Equity. Mr. Boyer
co-managed international equity portfolios at Jennison for 10
years before joining the Growth Equity team in 2003. Prior to
joining Jennison, Mr. Boyer held various investment roles at
Bleichroeder. Mr. Boyer began his investment career in 1983.
Natasha Kuhlkin, CFA
2022
Ms. Kuhlkin joined Jennison in 2004 and serves as Managing
Director and a Large Cap Growth Equity Portfolio Manager
and Research Analyst. Prior to joining Jennison, Ms. Kuhlkin
was an Equity Research Analyst at Palisade Capital Management. 
Prior to that, she was an Analyst with Evergreen Investment
Management. Ms. Kuhlkin began her investment career in 1998.
Kathleen A. McCarragher
2022
Ms. McCarragher joined Jennison in 1998 and serves as a
Managing Director, the Head of Growth Equity, and a Large
Cap Growth Equity Portfolio Manager. Prior to joining Jennison,
Ms. McCarragher was a Managing Director and the Director
of Large Cap Growth Equities at Weiss, Peck & Greer. Prior
to that, she held various roles at State Street Research &
Management. Ms. McCarragher began her investment career
in 1982.

71

The Subadvisors
Harbor Long-Term Growers ETF — continued
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Jason T. McManus
2022
Mr. McManus joined Jennison in 1997 and serves as a Managing
Director, the Head of Custom Solutions. An employee since
1997, Mr. McManus started as an international research associate
before joining the applied research team in 2003. In 2006, he
began managing quantitative portfolios and custom solutions
for clients. Mr. McManus began his investment career in 1997.
Harbor Scientific Alpha High-Yield ETF
BlueCove Limited (“BlueCove”), located at 10 New Burlington Street, London, W1S 3BE, England, serves as Subadvisor to Harbor Scientific Alpha High-Yield ETF and Harbor Scientific Alpha Income ETF. The portfolio managers are primarily responsible for the day-to-day portfolio management of each Fund.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Benjamin Brodsky, CFA
2021
Mr. Brodsky joined BlueCove in 2018 and is Chief Investment
Officer. He was Co-Chief Investment Officer from 2018 until
2019. Prior to joining BlueCove, Mr. Brodsky was Managing
Director and Deputy Chief Investment Officer of Systematic
Fixed Income at BlackRock. Mr. Brodsky previously held the
role of Global Head of Fixed Income Asset Allocation for Barclays
Global Investors before it merged with BlackRock in 2009.
Mr. Brodsky started his career in 1999 at Salomon Brothers
Asset Management.
Michael Harper, CFA
2021
Mr. Harper joined BlueCove in 2018 and is Head of Portfolio
Management. Prior to joining BlueCove, Mr. Harper was
Managing Director and Head of Core Portfolio Management
at BlackRock (formerly Barclays Global Investors) from 2001
to 2018. While at BlackRock, Mr. Harper was responsible for
building three new investment styles for EMEA and managed
the development of Smart Beta, Factor, and new systematic
strategies.
Benoy Thomas, CFA
2021
Mr. Thomas joined BlueCove in 2018 and is Head of Credit.
Prior to joining BlueCove, Mr. Thomas was a Managing Director
in Systematic Fixed Income at BlackRock focusing on Credit
and Capital structure investment strategies. During his 16 years
at BlackRock and Barclays Global Investors, Mr. Thomas helped
formulate investment insights and improve portfolio management
processes. Previously, Mr. Thomas was Assistant Vice President
of Global Markets at JP Morgan from 1999 to 2001.
Garth Flannery, CFA
2021
Mr. Flannery joined BlueCove in 2018 and is Head of Asset
Allocation. Prior to joining BlueCove, Mr. Flannery was Director
of Fixed Income Beta Research at BlackRock from 2016 to 2018.
Prior to this, Mr. Flannery was a Portfolio Manager and
Researcher in Systematic Fixed Income at BlackRock (formerly
Barclays Global Investors) from 2003 to 2016.

72

The Subadvisors
Harbor Scientific Alpha Income ETF
BlueCove Limited (“BlueCove”), located at 10 New Burlington Street, London, W1S 3BE, England, serves as Subadvisor to Harbor Scientific Alpha High-Yield ETF and Harbor Scientific Alpha Income ETF. The portfolio managers are primarily responsible for the day-to-day portfolio management of each Fund.
PORTFOLIO MANAGERS
SINCE
PROFESSIONAL EXPERIENCE
Benjamin Brodsky, CFA
2021
Mr. Brodsky joined BlueCove in 2018 and is Chief Investment
Officer. He was Co-Chief Investment Officer from 2018 until
2019. Prior to joining BlueCove, Mr. Brodsky was Managing
Director and Deputy Chief Investment Officer of Systematic
Fixed Income at BlackRock. Mr. Brodsky previously held the
role of Global Head of Fixed Income Asset Allocation for Barclays
Global Investors before it merged with BlackRock in 2009.
Mr. Brodsky started his career in 1999 at Salomon Brothers
Asset Management.
Michael Harper, CFA
2021
Mr. Harper joined BlueCove in 2018 and is Head of Portfolio
Management. Prior to joining BlueCove, Mr. Harper was
Managing Director and Head of Core Portfolio Management
at BlackRock (formerly Barclays Global Investors) from 2001
to 2018. While at BlackRock, Mr. Harper was responsible for
building three new investment styles for EMEA and managed
the development of Smart Beta, Factor, and new systematic
strategies.
Garth Flannery, CFA
2021
Mr. Flannery joined BlueCove in 2018 and is Head of Asset
Allocation. Prior to joining BlueCove, Mr. Flannery was Director
of Fixed Income Beta Research at BlackRock from 2016 to 2018.
Prior to this, Mr. Flannery was a Portfolio Manager and
Researcher in Systematic Fixed Income at BlackRock (formerly
Barclays Global Investors) from 2003 to 2016.
Benoy Thomas, CFA
2021
Mr. Thomas joined BlueCove in 2018 and is Head of Credit.
Prior to joining BlueCove, Mr. Thomas was a Managing Director
in Systematic Fixed Income at BlackRock focusing on Credit
and Capital structure investment strategies. During his 16 years
at BlackRock and Barclays Global Investors, Mr. Thomas helped
formulate investment insights and improve portfolio management
processes. Previously, Mr. Thomas was Assistant Vice President
of Global Markets at JP Morgan from 1999 to 2001.

73

The Subadvisors
C WorldWide International Composite Performance Information
The following table presents the past performance of the C WorldWide International Composite (the “C WorldWide International Composite”). C WorldWide is the Subadvisor to Harbor International Compounders ETF. The C WorldWide International Composite is comprised of all fee-paying accounts under discretionary management by C WorldWide that have investment objectives, policies and strategies substantially similar to those of the Fund. Returns include the reinvestment of interest, dividends and any other distributions and are presented in U.S. dollars. C WorldWide has prepared and presented the historical performance shown for the C WorldWide International Composite (gross) in compliance with the Global Investment Performance Standards (GIPS®). The GIPS method for computing historical performance differs from the SEC’s method. The gross performance data shown in the table does not reflect the deduction of investment advisory fees paid by the accounts comprising the C WorldWide International Composite or certain other expenses that would be applicable to exchange-traded funds. To calculate the performance of the C WorldWide International Composite net of expenses, the Advisor applied the estimated net Fund operating expenses payable by the Fund, as disclosed in the “Total Annual Fund Operating Expenses” line item of the Fund’s fee table, in the Fund Summary section. The net performance data may be more relevant to potential investors in the Fund in their analysis of the historical experience of C WorldWide in managing portfolios with substantially similar investment strategies and techniques to those of the Fund.
The historical performance of the C WorldWide International Composite is not that of Harbor International Compounders ETF and is not indicative of the Fund’s future results. The Fund’s actual performance may vary significantly from the past performance of the C WorldWide International Composite. While the accounts comprising the C WorldWide International Composite incur inflows and outflows of cash from clients, there can be no assurance that the continuous offering of the Fund’s shares and the Fund’s obligation to redeem its shares will not adversely impact the Fund’s performance. Also, not all of the accounts currently comprising the C WorldWide International Composite are subject to certain investment limitations, diversification requirements and other restrictions imposed by the Investment Company Act of 1940 and the Internal Revenue Code. If these limitations, requirements and restrictions were applicable to the accounts in the C WorldWide International Composite, they may have had an adverse effect on the performance results of the C WorldWide International Composite. However, C WorldWide does not believe that such accounts would have been managed in a significantly different manner had they been subject to such investment limitations, diversification requirements and other restrictions.

C WorldWide International composite*
 
Average Annual Total Returns for the Periods Ended December 31, 2022:
 
1 Year
3 Years
5 Years
Since
Inception
C WorldWide International Composite (net)
-15.33%
5.03%
4.19%
12.96%
C WorldWide International Composite (gross)
-14.87%
5.61%
4.76%
13.58%
MSCI All Country World Ex. U.S. (ND) Index**
-16.01%
0.07%
0.88%
5.83%
 
Calendar Year Total Returns for the Periods Ended December 31:
 
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
C WorldWide International Composite
(net)
14.69%
-0.80%
2.37%
-2.44%
32.84%
-16.76%
27.31%
25.04%
9.43%
-15.33%
C WorldWide International Composite
(gross)
15.32%
-0.25%
2.93%
-1.91%
33.57%
-16.30%
28.01%
25.73%
10.04%
-14.87%
MSCI All Country World Ex. U.S. (ND)
Index**
15.29%
-3.87%
-5.66%
4.50%
27.19%
-14.20%
21.51%
10.65%
7.82%
-16.01%

*
This is not the performance of Harbor International Compounders ETF. As of December 31, 2022, the C WorldWide International Composite was composed of 4 accounts, totaling approximately $329 million. The inception date of the C WorldWide International Composite was September 1, 1986. Performance presented prior to January 1, 1997, is from before the Subadvisor adopted the GIPS standards and may not comply with all of the GIPS requirements.
**
The MSCI All Country World Ex. U.S. (ND) Index is a free float-adjusted market capitalization weighted index that is designed to measure equity market performance in the global developed and emerging markets, excluding the United States. This unmanaged index does not reflect fees and expenses and is not available for direct investment. The benchmark results presented are a combination of two indices. The MSCI World ex USA Index was used prior to December 31, 2000, and the MSCI All Country World Ex. U.S. (ND) Index is used as of January 1, 2001.

74

The Subadvisors
Westfield Health Care Composite Performance Information
The following table presents the past performance of the Westfield Health Care Composite (the “Westfield Composite”). Westfield is the Subadvisor to Harbor Health Care ETF. The Westfield Composite is comprised of all fee-paying accounts under discretionary management by Westfield that have investment objectives, policies and strategies substantially similar to those of the Fund. Returns include the reinvestment of interest, dividends and any other distributions and are presented in U.S. dollars. Westfield has prepared and presented the historical performance shown for the Westfield Composite (gross) in compliance with the Global Investment Performance Standards (GIPS®). The GIPS method for computing historical performance differs from the SEC’s method. The gross performance data shown in the table does not reflect the deduction of investment advisory fees paid by the accounts comprising the Westfield Composite or certain other expenses that would be applicable to exchange-traded funds. To calculate the performance of the Westfield Composite net of expenses, the Advisor applied the estimated net Fund operating expenses payable by the Fund, as disclosed in the “Total Annual Fund Operating Expenses” line item of the Fund’s fee table, in the Fund Summary section. The net performance data may be more relevant to potential investors in the Fund in their analysis of the historical experience of Westfield in managing portfolios with substantially similar investment strategies and techniques to those of the Fund.
The historical performance of the Westfield Composite is not that of Harbor Health Care ETF and is not indicative of the Fund’s future results. The Fund’s actual performance may vary significantly from the past performance of the Health Care Composite. While the accounts comprising the Westfield Composite incur inflows and outflows of cash from clients, there can be no assurance that the continuous offering of the Fund’s shares and the Fund’s obligation to redeem its shares will not adversely impact the Fund’s performance. Also, not all of the accounts currently comprising the Westfield Composite are subject to certain investment limitations, diversification requirements and other restrictions imposed by the Investment Company Act of 1940 and the Internal Revenue Code. If these limitations, requirements and restrictions were applicable to the accounts in the Westfield Composite, they may have had an adverse effect on the performance results of the Westfield Composite. However, Westfield does not believe that such accounts would have been managed in a significantly different manner had they been subject to such investment limitations, diversification requirements and other restrictions.

Westfield composite*
 
1 Year
Since
Inception
Westfield Composite (net)
-13.18%
3.83%
Westfield Composite (gross)
-12.48
4.67
Russell 3000® Growth Health Care Index**
-14.49
3.65
 
Calendar Year Total
Returns for the
Periods Ended
December 31:
 
2020
2021
2022
Westfield Composite (net)
13.68%
10.29%
-13.18%
Westfield Composite (gross)
13.90
11.17
-12.48
Russell 3000® Growth Health Care Index
11.38
13.82
-14.49

*
This is not the performance of Harbor Health Care ETF. As of December 31, 2022, the Westfield Composite was composed of 1 accounts, totaling approximately $2.5 million. The inception date of the Westfield Composite was October 1, 2020.
**
The Russell 3000® Growth Health Care Index is an unmanaged index generally representative of companies involved in medical services or health care in the Russell 3000 Index, which is comprised of the 3,000 largest U.S. companies as determined by total market capitalization. This unmanaged index does not reflect fees and expenses and is not available for direct investment.

75

Shareholder Information
Valuing Fund Shares
Each Fund’s net asset value (“NAV”) per share, is generally calculated each day the NYSE is open for trading as of the close of regular trading on the NYSE, generally 4:00 p.m. Eastern time. The NAV per share is computed by dividing the net assets of a Fund by the number of Fund shares outstanding. The prices at which creations and redemptions occur are based on the next calculation of NAV after a creation or redemption order is received in an acceptable form. The time at which shares and transactions are priced and until which orders are accepted may vary to the extent permitted by the Securities and Exchange Commission and applicable regulations.
Shares of a Fund may be purchased through a broker in the secondary market by individual investors at market prices which may vary throughout the day and may differ from NAV.
On holidays or other days when the NYSE is closed, the NAV is not calculated and a Fund does not transact purchase or redemption requests. Trading of securities that are primarily listed on foreign exchanges may take place on weekends and U.S. business holidays on which a Fund’s NAV is not calculated. Consequently, a Fund’s portfolio securities may trade and the NAV of the Fund’s shares may be significantly affected on days when a shareholder will not be able to purchase or sell shares of the Fund.
Investments are valued pursuant to valuation procedures approved by the Board of Trustees. The valuation procedures permit the Advisor to use a variety of valuation methodologies, consider a number of subjective factors, analyze applicable facts and circumstances and, in general, exercise judgment, when valuing Fund investments. The methodology used for a specific type of investment may vary based on the circumstances and relevant considerations, including available market data. As a general matter, accurately fair valuing investments is difficult and can be based on inputs and assumptions that may not always be correct.
Each Fund generally values portfolio securities and other assets for which market quotes are readily available at market value for purposes of calculating the Fund’s NAV. In the case of equity securities, market value is generally determined on the basis of last reported sales prices, or if no sales are reported, on quotes obtained from a quotation reporting system, established market makers, or independent pricing vendors. In the case of fixed income securities and non-exchange traded derivative instruments, fair value is generally determined using prices provided by independent pricing vendors. The prices provided by independent pricing vendors reflect the pricing vendor’s assessment using various market inputs of what it believes are the fair values of the securities at the time of pricing. Those market inputs include recent transaction prices and dealer quotations for the securities, transaction prices for what the independent pricing vendor believes are similar securities and various relationships between factors such as interest rate changes and security prices that are believed to affect the prices of individual securities. Because many fixed income securities trade infrequently, the independent pricing vendor often does not have as a market input, current transaction price information when determining a price for a particular security on any given day. When current transaction price information is available, it is one input into the independent pricing vendor’s evaluation process, which means that the price supplied by the pricing vendor may differ from that transaction price. Short-term fixed income investments having a maturity of 60 days or less are generally valued at amortized cost, which approximates fair value. Exchange-traded options, futures and options on futures are generally valued at the settlement price determined by the relevant exchange.
Investments initially valued in currencies other than the U.S. dollar are converted to the U.S. dollar using exchange rates obtained from independent pricing vendors. As a result, the NAV of Fund shares may be affected by changes in the value of currencies in relation to the U.S. dollar. 
When reliable market quotations or prices supplied by an independent pricing vendor are not readily available or are not believed to accurately reflect fair value, securities are generally priced at their fair value, determined according to fair value pricing procedures adopted by the Board of Trustees. A Fund may also use fair value pricing if the value of some or all of the Fund’s securities have been materially affected by events occurring before the Fund’s pricing time but after the close of the primary markets or exchanges on which the security is traded. This most commonly occurs with foreign securities, but may occur with other securities as well. When fair value pricing is employed, the prices of securities used by a Fund to calculate its NAV may differ from market quotations, official closing prices or prices supplied by an independent pricing vendor for the same securities. This means a Fund may value those securities higher or lower than another given fund that uses market quotations, official closing prices or prices supplied by an independent pricing vendor. The fair value prices used by a Fund may also differ from the prices that the Fund could obtain for those securities if the Fund were to sell those securities at the time the Fund determines its NAV.

Buying and Selling Shares
Each Fund issues and redeems shares only in Creation Units at the NAV per share next determined after receipt of an order from an authorized participant. Authorized participants must be a member or participant of a clearing agency registered with the SEC and must execute a Participant Agreement that has been agreed to by the Distributor, and that has been accepted by the Transfer Agent, with respect to purchases and redemptions of Creation Units. Only authorized participants may acquire shares directly from a Fund, and only authorized participants may tender their shares for redemption directly to a Fund, at NAV. Once created, shares trade in the secondary market in quantities less than a Creation Unit.

76

Shareholder Information
These transactions are made at market prices that may vary throughout the day and may be greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). As a result, you may pay more than NAV when you purchase shares, and receive less than NAV when you sell shares, in the secondary market. If you buy or sell shares in the secondary market, you will generally incur customary brokerage commissions and charges and you may also incur the cost of the spread between the price at which a dealer will buy shares of a Fund and the somewhat higher price at which a dealer will sell shares. Due to such commissions and charges and spread costs, frequent trading may detract significantly from investment returns.
A Fund may impose a creation transaction fee and a redemption transaction fee to offset transfer and other transaction costs associated with the issuance and redemption of Creation Units of shares. Information about the procedures regarding creation and redemption of Creation Units and the applicable transaction fees is included in the Statement of Additional Information.

Distribution and Service (12b-1) Fees
Harbor ETF Trust has adopted a distribution plan for each Fund (except Harbor Scientific Alpha High-Yield ETF) in accordance with Rule 12b-1 under the Investment Company Act. Under each plan, the Funds are authorized to pay distribution and service fees to the Distributor for the sale, distribution and servicing of shares. No Rule 12b-1 fees are currently paid by the Funds, and there are no current plans to impose these fees. However, in the event Rule 12b-1 fees are charged in the future, because these fees are paid out of a Fund’s assets on an ongoing basis, these fees will increase the cost of your investment in the Fund may cost you more than certain other types of sales charges.

Investing Through a Financial Intermediary
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services, including making shares of a Fund and certain other Harbor funds available to their customers generally and in certain investment programs. Such payments, which may be significant to the intermediary or its representatives, are not made by a Fund. Rather, such payments are made by the Advisor or its affiliates from their own resources, which come directly or indirectly in part from fees paid by the Harbor fund complex. Payments of this type are sometimes referred to as revenue-sharing payments.
A financial intermediary may make decisions about which investment options it recommends or makes available, or the level of services provided, to its customers based on the payments or financial incentives it is eligible to receive. Therefore, such payments or other financial incentives offered or made to an intermediary create conflicts of interest between the intermediary (or its representatives) and its customers and may cause the intermediary to recommend a Fund or other Harbor funds over another investment. See the Statement of Additional Information for more information. Ask your sales representative or visit your financial intermediary’s website for more information.

Book Entry
Shares of the Funds are held in book-entry form, which means that no stock certificates are issued. The Depository Trust Company (DTC), or its nominee, is the registered owner of all outstanding shares of the Funds. Your ownership of shares will be shown on the records of DTC and the DTC participant broker-dealer through which you hold the shares. Your broker-dealer will provide you with account statements, confirmations of your purchases and sales, and tax information. Your broker-dealer will also be responsible for distributing income and capital gain distributions and for sending you shareholder reports and other information as may be required.

Frequent Purchases and Redemptions of Shares
Each Fund accommodates frequent purchases and redemptions of Creation Units by authorized participants and does not place a limit on purchases or redemptions of Creation Units by these investors. Each Fund reserves the right, but does not have the obligation, to reject any purchase or redemption transaction (subject to legal and regulatory limits regarding redemption transactions) at any time. In addition, each Fund reserves the right to impose restrictions on disruptive, excessive, or short-term trading.

Investments by Registered Investment Companies
Section 12(d)(1) of the Investment Company Act restricts investments by registered investment companies in the securities of other investment companies, including shares of the Funds. Registered investment

77

Shareholder Information
companies are permitted to invest in the Funds beyond the limits of Section 12(d)(1), subject to certain terms and conditions, including the requirement to enter into an agreement with a Fund.

Note to Authorized Participants Regarding Continuous Offering
Certain legal risks may exist that are unique to authorized participants purchasing Creation Units directly from a Fund. Because new Creation Units may be issued on an ongoing basis, at any point a “distribution," as such term is used in the Securities Act of 1933 (the 1933 Act), could be occurring. As a broker-dealer, certain activities that you perform may, depending on the circumstances, result in your being deemed a participant in a distribution, in a manner which could render you a statutory underwriter and subject you to the prospectus delivery and liability provisions of the 1933 Act.
For example, you may be deemed a statutory underwriter if you purchase Creation Units from a Fund, break them down into individual Fund shares, and sell such shares directly to customers, or if you choose to couple the creation of a supply of new Fund shares with an active selling effort involving solicitation of secondary market demand for Fund shares. A determination of whether a person is an underwriter for purposes of the 1933 Act depends upon all of the facts and circumstances pertaining to that person’s activities, and the examples mentioned here should not be considered a complete description of all the activities that could lead to a categorization as an underwriter.
Dealers who are not “underwriters” but are participating in a distribution (as opposed to engaging in ordinary secondary market transactions), and thus dealing with shares as part of an “unsold allotment” within the meaning of Section 4(a)(3)(C) of the 1933 Act, will be unable to take advantage of the prospectus delivery exemption provided by Section 4(a)(3) of the 1933 Act.
This is because the prospectus delivery exemption in Section 4(a)(3) of the 1933 Act is not available in respect of such transactions as a result of Section 24(d) of the 1940 Act. As a result, you should note that dealers who are not underwriters but are participating in a distribution (as opposed to engaging in ordinary secondary market transactions) and thus dealing with the shares that are part of an overallotment within the meaning of Section 4(a)(3)(A) of the 1933 Act would be unable to take advantage of the prospectus delivery exemption provided by Section 4(a)(3) of the 1933 Act. Firms that incur a prospectus-delivery obligation with respect to shares of a Fund are reminded that, under Rule 153 under the 1933 Act, a prospectus delivery obligation under Section 5(b)(2) of the 1933 Act owed to an exchange member in connection with a sale on an exchange is satisfied by the fact that the prospectus is available at the exchange upon request. The prospectus delivery mechanism provided in Rule 153 is only available with respect to transactions on an exchange. Certain affiliates of each Fund may purchase and resell Fund shares pursuant to this prospectus.

78

Shareholder and Account Policies
This Prospectus provides general tax information only. You should consult your tax adviser about particular federal, state, local or foreign taxes that may apply to you.
Dividends, Distributions and Taxes
Each Fund expects to distribute all or substantially all of its net investment income and realized capital gains, if any, each year. Each Fund, except as indicated below, declares and pays any dividends from net investment income and capital gains at least annually in December. Harbor Scientific Alpha High-Yield ETF and Harbor Scientific Alpha Income ETF declare and pay any dividends from net investment income monthly. Harbor Dividend Growth Leaders ETF declares and pays any dividends from net investment income quarterly. Each Fund may also pay dividends and capital gain distributions at other times if necessary, to avoid federal income or excise tax. Each Fund expects distributions, if any, to be from net investment income and/or capital gains. If you purchased your shares in the secondary market, your broker is responsible for distributing the income and capital gains distributions to you.
For U.S. federal income tax purposes, distributions of net long-term capital gains are taxable as long-term capital gains which may be taxable at different rates depending on their source and other factors. Distributions of net short-term capital gains are taxable as ordinary income. Dividends from net investment income are taxable either as ordinary income or, if so reported by a Fund and certain other conditions (including holding period requirements) are met by the Fund and the shareholder, as “qualified dividend income” (“QDI”). QDI is taxable to individual shareholders at a maximum rate of 15% or 20% for U.S. federal income tax purposes (depending on whether the individual’s income exceeds certain threshold amounts). More information about QDI is included in the Funds’ Statement of Additional Information. Since Harbor Scientific Alpha High-Yield ETF’s and Harbor Scientific Alpha Income ETF’s income is derived primarily from sources that do not pay “qualified dividend income,” dividends from the Funds generally will not qualify for taxation at the maximum rate of 15% or 20% U.S. federal income tax rate available to individuals on qualified dividend income. Dividends and capital gains distributions are taxable whether you receive them in cash or reinvest them in additional Fund shares.
Generally, you should avoid investing in a Fund shortly before an anticipated dividend or capital gain distribution. If you purchase shares of a Fund just before the distribution, you will pay the full price for the shares and receive a portion of the purchase price back as a taxable distribution. Dividends paid to you may be included in your gross income for tax purposes, even though you may not have participated in the increase in the NAV of the Fund. This is referred to as “buying a dividend.”
When you sell Fund shares, you generally will realize a capital gain or capital loss in an amount equal to the difference between the net amount of the sale proceeds you receive and your tax basis for the shares that you sell or exchange. Character and tax status of distributions will be available to shareholders after the close of each calendar year.
An additional 3.8% Medicare tax is imposed on certain net investment income (including ordinary dividends and capital gains distributions received from a Fund and net gains from redemptions or other taxable dispositions of Fund shares) earned by U.S. individuals, estates and trusts to the extent that such person’s “modified adjusted gross income” (in the case of an individual) or “adjusted gross income” (in the case of an estate or trust) exceeds a threshold amount.
If you do not provide your correct social security number or other taxpayer identification number, along with certifications required by the Internal Revenue Service (“IRS”), you may be subject to a backup withholding tax, currently at a rate of 24%, on any dividends and capital gain distributions, and any other payments to you. Investors other than U.S. persons may be subject to different U.S. federal income tax treatment, including withholding tax at the rate of 30% (or lower applicable treaty rate) on amounts treated as ordinary dividends or otherwise “withholdable payments” from a Fund, as discussed in more detail in the Funds’ Statement of Additional Information.
A note on Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF) and Harbor Energy Transition Strategy ETF. One of the requirements for favorable tax treatment as a regulated investment company under the Code is that the Funds derive at least 90% of their gross income from certain qualifying sources of income. Income and gains from direct investments by a Fund in commodity-related instruments generally would not be treated as qualifying income. The IRS has issued final regulations that generally treat the Fund’s income inclusion with respect to the Subsidiary as qualifying income if either (A) there is a current-year distribution out of the earnings and profits of the Subsidiary that are attributable to such income inclusion or (B) such inclusion is derived with respect to the Fund’s business of investing in stock, securities, or currencies. Based upon these Treasury Regulations, each Fund expects income and gains derived from the Subsidiary to constitute qualifying income.
A Subsidiary generally will not be subject to U.S. federal income tax. Each Subsidiary will, however, be considered a controlled foreign corporation, and the respective Fund will be treated as a “U.S. shareholder” of such Subsidiary. As a result, each Fund will be required to include in its annual income, income earned by the respective Subsidiary during the applicable year, whether or not such income is distributed by the Subsidiary. Furthermore, each Fund will be subject to the distribution requirement applicable to open-end management investment companies on such Subsidiary income, whether or not the Subsidiary actually makes a distribution to the Fund during the taxable year. If a net loss is realized by a Subsidiary, such

79

Shareholder and Account Policies
loss is not generally available to offset the income earned by the respective Fund, and such loss would not be carried forward to offset taxable income of the Fund or the Subsidiary in future periods.
Future legislation, Treasury Regulations, court decisions and/or guidance issued by the IRS could limit the circumstances in which income and gains derived from a Subsidiary would be considered qualifying income under Subchapter M of the Code or otherwise affect the character, timing and/or amount of such Fund’s taxable income or any gains and distributions made by the Fund.
If a Fund fails to qualify as a regulated investment company for any taxable year, such Fund’s taxable income would be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. In such event, in order to re-qualify for taxation as a regulated investment company, the Fund may be required to recognize unrealized gains, pay substantial taxes and interest and make certain distributions.

Taxes on Creations and Redemptions of Creation Units
An authorized participant who exchanges securities for Creation Units generally will recognize a gain or loss. The gain or loss will be equal to the difference between the market value of the Creation Units at the time of exchange and the sum of the exchanger’s aggregate basis in the securities surrendered and the amount of any cash paid for such Creation Units. An authorized participant who exchanges Creation Units for securities will generally recognize a gain or loss equal to the difference between the exchanger’s basis in the Creation Units and the sum of the aggregate market value of the securities received. The IRS, however, may assert that a loss realized upon an exchange of primarily securities for Creation Units cannot be deducted currently under the rules governing “wash sales,” or on the basis that there has been no significant change in economic position. Authorized participants exchanging securities for Creation Units or redeeming Creation Units should consult their own tax advisers with respect to whether wash sale rules apply and when a loss might be deductible and the tax treatment of any creation or redemption transaction.
Under current U.S. federal income tax laws, any capital gain or loss realized upon a redemption (or creation) of Creation Units held as capital assets is generally treated as long-term capital gain or loss if the Shares (or securities surrendered) have been held for more than one year and as a short-term capital gain or loss if the Shares (or securities surrendered) have been held for one year or less.
If you create or redeem Creation Units, you will be sent a confirmation statement showing how many Shares you created or sold and at what price.

Cost Basis
The cost basis of Shares acquired by purchase will generally be based on the amount paid for the Shares subject to adjustments as required by the Internal Revenue Code. The difference between the selling price and the cost basis of Shares generally determines the amount of the capital gain or loss realized on the sale or exchange of Shares. The cost basis information for sale transactions is generally required to be reported to the IRS and the shareholders. You may elect to have one of several cost basis methods applied to your account and should consult with your tax adviser regarding your specific situation. You should contact your financial intermediary through whom you purchased your Shares to obtain information with respect to the available cost basis reporting methods and elections for your account.

80

Financial Highlights

The financial highlights table is intended to help you understand the financial performance of each Fund. Certain information reflects financial results for a single Fund share. Total returns represent the rate that a shareholder would have earned/lost on an investment in a Fund (assuming reinvestment of all dividends and distributions). On May 20, 2022, the Westfield Capital Dividend Growth Fund was reorganized into the Harbor Dividend Growth Leaders ETF. Information for the period prior to May 20, 2022 is that of the predecessor fund.
This information has been audited by Ernst & Young LLP, an independent registered public accounting firm, whose report, along with the Funds’ financial statements, are included in the Funds’ most recent annual report to shareholders, which is available upon request. No financial highlights exist for Harbor Health Care ETF, which commenced operations on November 16, 2022.

HARBOR COMMODITY ALL-WEATHER STRATEGY ETF (FORMERLY, HARBOR ALL-WEATHER INFLATION FOCUS ETF) (CONSOLIDATED)
 
Period from
February 9, 2022a
through
October 31,
2022
Net asset value beginning of period
$20.00
Income from Investment Operations
 
Net investment income/(loss)b
0.04
Net realized and unrealized gain/(loss) on investments
0.88
Total from investment operations
0.92
Net asset value end of period
20.92
Net assets end of period (000s)
$63,807
Ratios and Supplemental Data (%)
 
Total return
4.60%c
Ratio of total expenses to average net assets
0.68d
Ratio of net investment income/(loss) to average net assets
0.27d

HARBOR CORPORATE CULTURE ETF
 
Period from
October 12, 2022a
through
October 31,
2022
Net asset value beginning of period
$19.96
Income from Investment Operations
 
Net investment income/(loss)b
0.01
Net realized and unrealized gain/(loss) on investments
1.81
Total from investment operations
1.82
Net asset value end of period
21.78
Net assets end of period (000s)
$217,246
Ratios and Supplemental Data (%)
 
Total return
9.12%c
Ratio of total expenses to average net assets
0.35d
Ratio of net investment income/(loss) to average net assets
0.98d
Portfolio turnover^
2c
See page 86 for notes to the Financial Highlights.

81


HARBOR CORPORATE CULTURE LEADERS ETF
 
Period from
February 23, 2022a
through
October 31,
2022
Net asset value beginning of period
$19.31
Income from Investment Operations
 
Net investment income/(loss)b
0.02
Net realized and unrealized gain/(loss) on investments
(3.31)
Total from investment operations
(3.29)
Net asset value end of period
16.02
Net assets end of period (000s)
$6,807
Ratios and Supplemental Data (%)
 
Total return
(17.04)%c
Ratio of total expenses to average net assets
0.50d
Ratio of net investment income/(loss) to average net assets
0.16d
Portfolio turnover^
18c

HARBOR DISRUPTIVE INNOVATION ETF
 
Period from
December 1, 2021a
through
October 31,
2022
Net asset value beginning of period
$20.00
Income from Investment Operations
 
Net investment income/(loss)b,e
(0.02)
Net realized and unrealized gain/(loss) on investments
(8.55)
Total from investment operations
(8.57)
Net asset value end of period
11.43
Net assets end of period (000s)
$7,146
Ratios and Supplemental Data (%)
 
Total return+
(42.85)%c
Ratio of total expenses to average net assets
0.75d
Ratio of net expenses to average net assetse
0.55d
Ratio of net investment income/(loss) to average net assetse
(0.18)d
Portfolio turnover^
71c

82

Financial Highlights

HARBOR DIVIDEND GROWTH LEADERS ETF
 
Year Ended October 31,
 
2022
2021
2020
2019
2018
Net asset value beginning of period
$16.50
$13.13
$12.33
$11.69
$12.21
Income from Investment Operations
 
 
 
 
 
Net investment income/(loss)b,e
0.25
0.19
0.17
0.19
0.16
Net realized and unrealized gain/(loss) on investments
(1.28)
4.33
0.85
1.44
0.81
Total from investment operations
(1.03)
4.52
1.02
1.63
0.97
Less Distributions
 
 
 
 
 
Dividends from net investment income
(0.18)
(0.16)
(0.22)
(0.14)
(0.16)
Distributions from net realized capital gains
(2.95)
(0.99)
(0.85)
(1.33)
Total distributions
(3.13)
(1.15)
(0.22)
(0.99)
(1.49)
Net asset value end of period
12.34
16.50
13.13
12.33
11.69
Net assets end of period (000s)
$141,675
$156,827
$121,448
$131,791
$115,153
Ratios and Supplemental Data (%)
 
 
 
 
 
Total return+
(8.48)%
36.30%
8.28%
16.30%
8.31%
Ratio of total expenses to average net assets
0.83
1.05
1.09
1.13
1.08
Ratio of net expenses to average net assetse
0.76
0.95
0.95
0.95
0.95
Ratio of net investment income/(loss) to average net assetse
1.86
1.25
1.39
1.71
1.31
Portfolio turnover^
78
62
76
71
69

HARBOR ENERGY TRANSITION STRATEGY ETF (CONSOLIDATED)
 
Period from
July 13, 2022a
through
October 31,
2022
Net asset value beginning of period
$20.00
Income from Investment Operations
 
Net investment income/(loss)b
0.05
Net realized and unrealized gain/(loss) on investments
(1.07)
Total from investment operations
(1.02)
Net asset value end of period
18.98
Net assets end of period (000s)
$21,354
Ratios and Supplemental Data (%)
 
Total return
(5.10)%c
Ratio of total expenses to average net assets
0.80d
Ratio of net investment income/(loss) to average net assets
0.74d
See page 86 for notes to the Financial Highlights.

83


HARBOR INTERNATIONAL COMPOUNDERS ETF
 
Period from
September 7, 2022a
through
October 31,
2022
Net asset value beginning of period
$19.89
Income from Investment Operations
 
Net investment income/(loss)b
0.02
Net realized and unrealized gain/(loss) on investments
(0.45)
Total from investment operations
(0.43)
Net asset value end of period
19.46
Net assets end of period (000s)
$6,324
Ratios and Supplemental Data (%)
 
Total return
(2.16)%c
Ratio of total expenses to average net assets
0.55d
Ratio of net investment income/(loss) to average net assets
0.57d
Portfolio turnover^
1c

HARBOR LONG-TERM GROWERS ETF
 
Period from
February 2, 2022a
through
October 31,
2022
Net asset value beginning of period
$19.32
Income from Investment Operations
 
Net investment income/(loss)b
—*
Net realized and unrealized gain/(loss) on investments
(4.87)
Total from investment operations
(4.87)
Net asset value end of period
14.45
Net assets end of period (000s)
$78,726
Ratios and Supplemental Data (%)
 
Total return
(25.22)%c
Ratio of total expenses to average net assets
0.57d
Ratio of net investment income/(loss) to average net assets
0.03d
Portfolio turnover^
24c

84

Financial Highlights

HARBOR SCIENTIFIC ALPHA HIGH-YIELD ETF
 
Year Ended
October 31,
2022
Period from
September 14, 2021a
through
October 31,
2021
Net asset value beginning of period
$49.64
$50.00
Income from Investment Operations
 
 
Net investment income/(loss)b
2.34
1.70
Net realized and unrealized gain/(loss) on investments
(6.94)
(2.07)
Total from investment operations
(4.60)
(0.37)
Less Distributions
 
 
Dividends from net investment income
(2.53)
Distributions from net realized capital gains
(0.01)
Total distributions
(2.54)
Net asset value end of period
42.50
49.64
Net assets end of period (000s)
$29,838
$34,844
Ratios and Supplemental Data (%)
 
 
Total return
(9.49)%
(0.72)%c
Ratio of total expenses to average net assets
0.48
0.48d
Ratio of net investment income/(loss) to average net assets
5.13
3.42d
Portfolio turnover^
114
1c

HARBOR SCIENTIFIC ALPHA INCOME ETF
 
Year Ended
October 31,
2022
Period from
September 14, 2021a
through
October 31,
2021
Net asset value beginning of period
$49.10
$50.00
Income from Investment Operations
 
 
Net investment income/(loss)b
1.42
1.00
Net realized and unrealized gain/(loss) on investments
(7.24)
(1.90)
Total from investment operations
(5.82)
(0.90)
Less Distributions
 
 
Dividends from net investment income
(1.40)
Total distributions
(1.40)
Net asset value end of period
41.88
49.10
Net assets end of period (000s)
$29,314
$34,367
Ratios and Supplemental Data (%)
 
 
Total return
(12.02)%
(1.80)%c
Ratio of total expenses to average net assets
0.50
0.50d
Ratio of net investment income/(loss) to average net assets
3.15
2.02d
Portfolio turnover^
124
c
See page 86 for notes to the Financial Highlights.

85



^
Portfolio turnover rate excludes investments received or delivered from in-kind processing of creation unit purchases or redemptions.
+
The total return would have been lower had management fee not been waived during the period shown.
*
Less than $0.01
(a)
Commencement of operations
(b)
Amounts are based on average daily shares outstanding during the period.
(c)
Unannualized
(d)
Annualized
(e)
Reflects the Adviser’s waiver, if any, of its management fees

86

Fund Details

Other Harbor funds managed by the Advisor are offered by means of separate prospectuses. To obtain a prospectus for any of the Harbor funds visit our website at harborcapital.com or call 800-422-1050 during normal business hours.
CUSIP
NUMBER
TICKER
SYMBOL
 
HARBOR ETF TRUST
Harbor Commodity All-Weather Strategy ETF (formerly, Harbor All-Weather Inflation Focus ETF)
41151J505
HGER
 
Harbor Corporate Culture ETF
41151J877
HAPI
 
Harbor Corporate Culture Leaders ETF
41151J604
HAPY
 
Harbor Disruptive Innovation ETF
41151J307
INNO
 
Harbor Dividend Growth Leaders ETF
41151J703
GDIV
 
Harbor Energy Transition Strategy ETF
41151J802
RENW
 
Harbor Health Care ETF
41151J869
MEDI
 
Harbor International Compounders ETF
41151J885
OSEA
 
Harbor Long-Term Growers ETF
41151J406
WINN
 
Harbor Scientific Alpha High-Yield ETF
41151J109
SIHY
 
Harbor Scientific Alpha Income ETF
41151J208
SIFI
 

Updates Available
For updates on the Harbor ETF Trust following the end of each calendar quarter, please visit our website at harborcapital.com.

87


(Lighthouse Logo)
For more information
For investors who would like more information about the Funds, the following
documents are available upon request:
Annual/Semi-Annual Reports
Additional information about the each Fund’s investments is available in the Funds' annual and semi-annual reports to shareholders. The annual report contains a discussion of the market conditions and investment strategies that significantly affected each Fund’s performance during its last fiscal year.
Statement of Additional Information (SAI)
The SAI provides more detailed information about each Fund and is incorporated into this prospectus by reference and therefore is legally part of this prospectus.
This prospectus is not an offer to sell securities in places other than the United States, its territories, and those countries where shares of a Fund are registered for sale.
Investment Adviser
Harbor Capital Advisors, Inc.
111 South Wacker Drive, 34th Floor
Chicago, IL 60606-4302
312-443-4400
Distributor
Foreside Fund Services, LLC
Three Canal Plaza, Suite 100
Portland, ME 04101
484-320-6239
Shareholder Inquiries
P.O. Box 804660
Chicago, IL 60680-4108
800-422-1050
Obtain Documents
Free copies of the annual and semi-annual reports, the SAI, and other information about the Funds are available:
(Globe Icon)
harborcapital.com
(Phone Icon)
800-422-1050
Harbor ETF Trust
P.O. Box 804660
Chicago, IL 60680-4108
Investors may get text-only copies:
(Globe Icon)
sec.gov
(Envelope Icon)
[email protected] (for a fee)
Trustees & Officers
Charles F. McCain
Chairman, President & Trustee
Scott M. Amero
Trustee
Donna J. Dean
Trustee
Robert Kasdin
Trustee
Kathryn L. Quirk
Trustee
Douglas J. Skinner
Trustee
Ann M. Spruill
Trustee
Landis Zimmerman
Trustee
Erik D. Ojala
Chief Compliance Officer
John M. Paral
Treasurer
Kristof M. Gleich
Vice President
Gregg M. Boland
Vice President and
AML Compliance Officer
Richard C. Sarhaddi
Vice President
Lora A. Kmieciak
Vice President
Diane J. Johnson
Vice President
Diana R. Podgorny
Secretary
Lana M. Lewandowski
Assistant Secretary
Investment Company Act File No. 811-23661
ETF.P.0323