Prospectus - Investment Objective
 
 
 
Fund/Ticker
Fidelity® SAI Small-Mid Cap 500 Index Fund/FZFLX
Offered exclusively to certain clients of the Adviser, or its affiliates, including Strategic Advisers LLC (Strategic Advisers) - not available for sale to the general public. Fidelity® SAI is a product name of Fidelity® funds dedicated to certain programs affiliated with Strategic Advisers.
 
Prospectus
September 29, 2023
 
 
Like securities of all mutual funds, these securities have not been approved or disapproved by the Securities and Exchange Commission, and the Securities and Exchange Commission has not determined if this prospectus is accurate or complete. Any representation to the contrary is a criminal offense.
245 Summer Street, Boston, MA 02210

Contents

Fund Summary

Fidelity® SAI Small-Mid Cap 500 Index Fund

Fund Basics

Investment Details

Valuing Shares

Shareholder Information

Additional Information about the Purchase and Sale of Shares

Dividends and Capital Gain Distributions

Tax Consequences

Fund Services

Fund Management

Fund Distribution

Appendix

Financial Highlights

Additional Index Information

 
Fund Summary
Fund:
Fidelity® SAI Small-Mid Cap 500 Index Fund
Investment Objective
Fidelity® SAI Small-Mid Cap 500 Index Fund seeks to provide investment results that correspond to the total return of stocks of small- to mid-capitalization United States companies.
Fee Table
The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund.
 
Shareholder fees
(fees paid directly from your investment)
None
Annual Operating Expenses
(expenses that you pay each year as a % of the value of your investment)
Management fee
0.11%   
Distribution and/or Service (12b-1) fees
None   
Other expenses
0.04%   
Total annual operating expenses
0.15%   
Fee waiver and/or expense reimbursement
0.10%   A
Total annual operating expenses after fee waiver and/or expense reimbursement
0.05%   
AFidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse the fund to the extent that total operating expenses (excluding interest, certain taxes, fees and expenses of the Independent Trustees, proxy and shareholder meeting expenses, extraordinary expenses, and acquired fund fees and expenses (including fees and expenses associated with a wholly owned subsidiary), if any, as well as non-operating expenses such as brokerage commissions and fees and expenses associated with the fund's securities lending program, if applicable), as a percentage of its average net assets, exceed 0.05% (the Expense Cap). If at any time during the current fiscal year expenses for the fund fall below the Expense Cap, FMR reserves the right to recoup through the end of the fiscal year any expenses that were reimbursed during the current fiscal year up to, but not in excess of, the Expense Cap. This arrangement will remain in effect through November 30, 2024. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.
This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:
 
 
1 year
$
5
3 years
$
35
5 years
$
71
10 years
$
178
 
 
 
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 rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 76% of the average value of its portfolio.
Principal Investment Strategies
  • Normally investing at least 80% of assets in securities included in the Russell SMID 500™ Index.
  • Lending securities to earn income for the fund.
Principal Investment Risks
  • Stock Market Volatility.
Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.
  • Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
Changes in the financial condition of an issuer or counterparty (e.g., broker-dealer or other borrower in a securities lending transaction) can increase the risk of default by an issuer or counterparty, which can affect a security's or instrument's value or result in delays in recovering securities and/or capital from a counterparty.
  • Correlation to Index.
The performance of the fund and its underlying index may vary somewhat due to factors such as fees and expenses of the fund, transaction costs, sample selection, regulatory restrictions, and timing differences associated with additions to and deletions from the index. Errors in the construction or calculation of the index may occur from time to time and may not be identified and corrected for some period of time, which may have an adverse impact on the fund and its shareholders.
  • Passive Management Risk.
The fund is managed with a passive investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the fund's index or of the actual securities included in the index. This differs from an actively managed fund, which typically seeks to outperform a benchmark index. As a result, the fund's performance could be lower than actively managed funds that may shift their portfolio assets to take advantage of market opportunities or lessen the impact of a market decline or a decline in the value of one or more issuers.
  • Small- and Mid-Cap Investing.
The value of securities of small to medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers.
  • Securities Lending Risk.
Securities lending involves the risk that the borrower may fail to return the securities loaned in a timely manner or at all. If the borrower defaults on its obligation to return the securities loaned because of insolvency or other reasons, a fund could experience delays and costs in recovering the securities loaned or in gaining access to the collateral.
An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.
Performance
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time. The index description appears in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information.
 
Year-by-Year Returns
 
 
 
 
 
2016
2017
2018
2019
2020
2021
2022
 
14.62%
 
18.40%
 
-9.25%
 
29.53%
 
19.77%
 
20.92%
 
-16.73%
 
During the periods shown in the chart:
Returns
Quarter ended
   Highest Quarter Return
27.27%
June 30, 2020
   Lowest Quarter Return
-29.06%
March 31, 2020
   Year-to-Date Return
9.38%
June 30, 2023
 
Average Annual Returns
 
After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.
 
For the periods ended December 31, 2022
Past 1
year
Past 5
years
Life of
fund A
Fidelity® SAI Small-Mid Cap 500 Index Fund
 
 
 
Return Before Taxes
-16.73%
7.23%
8.30%
Return After Taxes on Distributions
-25.31%
2.05%
4.57%
Return After Taxes on Distributions and Sale of Fund Shares
 
-3.18%
5.75%
6.64%
Russell SMID 500™ Index
(reflects no deduction for fees, expenses, or taxes)
 
-16.77%
 
7.26%
 
8.35%
 
 
 
 
AFrom August 12, 2015.
 
Investment Adviser
Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Geode Capital Management, LLC serves as a  sub-adviser for the fund.
Portfolio Manager(s)
Louis Bottari (Senior Portfolio Manager) has managed the fund since 2015.
Peter Matthew (Senior Portfolio Manager) has managed the fund since 2015.
Robert Regan (Portfolio Manager) has managed the fund since 2016.
Payal Gupta (Portfolio Manager) has managed the fund since 2019.
Navid Sohrabi (Portfolio Manager) has managed the fund since 2019.
Purchase and Sale of Shares
NOT AVAILABLE FOR SALE TO THE GENERAL PUBLIC.
Shares are offered exclusively to certain clients of the Adviser or its affiliates.
The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form.
The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form.
The fund is open for business each day the New York Stock Exchange (NYSE) is open.
There is no purchase minimum for fund shares.
Tax Information
Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.
 
Fund Basics
Investment Details
 
Investment Objective
Fidelity® SAI Small-Mid Cap 500 Index Fund seeks to provide investment results that correspond to the total return of stocks of small- to mid-capitalization United States companies.
Principal Investment Strategies
Geode Capital Management, LLC (Geode) normally invests at least 80% of the fund's assets in securities included in the Russell SMID 500 Index. The Russell SMID 500 Index is a market capitalization-weighted index of the top 500 companies in the Russell 2500 Index, ranked by market capitalization.
The fund may not always hold all of the same securities as the Russell SMID 500™ Index. Geode may use statistical sampling techniques to attempt to replicate the returns of the index. Statistical sampling techniques attempt to match the investment characteristics of the index and the fund by taking into account such factors as capitalization, industry exposures, dividend yield, price/earnings (P/E) ratio, price/book (P/B) ratio, and earnings growth.
The fund may not track the index because differences between the index and the fund's portfolio can cause differences in performance. In addition, expenses and transaction costs, the size and frequency of cash flows into and out of the fund, and differences between how and when the fund and the index are valued can cause differences in performance.
The fund may lend securities to broker-dealers or other institutions to earn income.
If Geode's strategies do not work as intended, the fund may not achieve its objective.
Description of Principal Security Types
Equity securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. Different types of equity securities provide different voting and dividend rights and priority in the event of the bankruptcy of the issuer. Equity securities include common stocks, preferred stocks, convertible securities, and warrants.
Principal Investment Risks
Many factors affect the fund's performance. Developments that disrupt global economies and financial markets, such as pandemics and epidemics, may magnify factors that affect a fund's performance. The fund's share price changes daily based on changes in market conditions and interest rates and in response to other economic, political, or financial developments. The fund's reaction to these developments will be affected by the types of securities in which the fund invests, the financial condition, industry and economic sector, and geographic location of an issuer, and the fund's level of investment in the securities of that issuer. When you sell your shares they may be worth more or less than what you paid for them, which means that you could lose money by investing in the fund.
The following factors can significantly affect the fund's performance:
Stock Market Volatility. The value of equity securities fluctuates in response to issuer, political, market, and economic developments. Fluctuations, especially in foreign markets, can be dramatic over the short as well as long term, and different parts of the market, including different market sectors, and different types of equity securities can react differently to these developments. For example, stocks of companies in one sector can react differently from those in another, large cap stocks can react differently from small cap stocks, and "growth" stocks can react differently from "value" stocks. Issuer, political, or economic developments can affect a single issuer, issuers within an industry or economic sector or geographic region, or the market as a whole. Changes in the financial condition of a single issuer can impact the market as a whole. Terrorism and related geo-political risks have led, and may in the future lead, to increased short-term market volatility and may have adverse long-term effects on world economies and markets generally.
Issuer-Specific Changes. Changes in the financial condition of an issuer or counterparty (e.g., broker-dealer or other borrower in a securities lending transaction), changes in specific economic or political conditions that affect a particular type of security or issuer, and changes in general economic or political conditions can increase the risk of default by an issuer or counterparty, which can affect a security's or instrument's value or result in delays in recovering securities and/or capital from a counterparty. The value of securities of smaller, less well-known issuers can be more volatile than that of larger issuers.
Correlation to Index. The performance of the fund and its index may vary somewhat due to factors such as fees and expenses of the fund, transaction costs, imperfect correlation between the fund's securities and those in its index, timing differences associated with additions to and deletions from its index, and changes in the shares outstanding of the component securities. In addition, the fund may not be able to invest in certain securities in its index or invest in them in the exact proportions in which they are represented in the index due to regulatory restrictions. The fund may not be fully invested at times, either as a result of cash flows into the fund or as a result of reserves of cash held by the fund to meet redemptions. The use of sampling techniques or futures or other derivative positions may affect the fund's ability to achieve close correlation with its index. Errors in the construction or calculation of the index may occur from time to time and may not be identified and corrected for some period of time, which may have an adverse impact on the fund and its shareholders.
Passive Management Risk. An index fund is managed with a passive investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the fund's index or of the actual securities included in the index. This differs from an actively managed fund, which typically seeks to outperform a benchmark index. As a result, an index fund's performance could be lower than actively managed funds that may shift their portfolio assets to take advantage of market opportunities or lessen the impact of a market decline or a decline in the value of one or more issuers. The structure and composition of an index fund's index will affect the performance, volatility, and risk of the index and, consequently, the performance, volatility, and risk of the fund.
Small- and Mid-Cap Investing. The value of securities of small to medium size, less well-known issuers can be more volatile than that of relatively larger issuers and can react differently to issuer, political, market, and economic developments than the market as a whole and other types of stocks. Smaller issuers can have more limited product lines, markets, and financial resources.
Securities Lending Risk. Securities lending involves the risk that the borrower may fail to return the securities loaned in a timely manner or at all. If the borrower defaults on its obligation to return the securities loaned because of insolvency or other reasons, a fund could experience delays and costs in recovering the securities loaned or in gaining access to the collateral. These delays and costs could be greater for foreign securities. If a fund is not able to recover the securities loaned, the fund may sell the collateral and purchase a replacement investment in the market. The value of the collateral could decrease below the value of the replacement investment by the time the replacement investment is purchased.
Other Investment Strategies
In addition to the principal investment strategies discussed above, Geode may use various techniques, such as buying and selling futures contracts, swaps, and exchange traded funds, to increase or decrease the fund's exposure to changing security prices or other factors that affect security values.
 
Fundamental Investment Policies
The following is fundamental, that is, subject to change only by shareholder approval:
Fidelity® SAI Small-Mid Cap 500 Index Fund seeks to provide investment results that correspond to the total return of stocks of small- to mid-capitalization United States companies.
 
 
 
 
Shareholder Notice
The following is subject to change only upon 60 days' prior notice to shareholders:
Fidelity® SAI Small-Mid Cap 500 Index Fund normally invests at least 80% of its assets in securities included in the Russell SMID 500 Index.
Valuing Shares
 
The fund is open for business each day the NYSE is open.
The NAV is the value of a single share. Fidelity normally calculates NAV as of the close of business of the NYSE, normally 4:00 p.m. Eastern time. The fund's assets normally are valued as of this time for the purpose of computing NAV.
NAV is not calculated and the fund will not process purchase and redemption requests submitted on days when the fund is not open for business. The time at which shares are priced and until which purchase and redemption orders are accepted may be changed as permitted by the Securities and Exchange Commission (SEC).
To the extent that the fund's assets are traded in other markets on days when the fund is not open for business, the value of the fund's assets may be affected on those days. In addition, trading in some of the fund's assets may not occur on days when the fund is open for business.
NAV is calculated using the values of other open-end funds, if any, in which the fund invests (referred to as underlying funds). Shares of underlying funds are valued at their respective NAVs. Other assets are valued primarily on the basis of market quotations, official closing prices, or information furnished by a pricing service. Certain short-term securities are valued on the basis of amortized cost. If market quotations, official closing prices, or information furnished by a pricing service are not readily available or, in the Adviser's opinion, are deemed unreliable for a security, then that security will be fair valued in good faith by the Adviser in accordance with applicable fair value pricing policies. For example, if, in the Adviser's opinion, a security's value has been materially affected by events occurring before a fund's pricing time but after the close of the exchange or market on which the security is principally traded, then that security will be fair valued in good faith by the Adviser in accordance with applicable fair value pricing policies. Fair value pricing will be used for high yield debt securities when available pricing information is determined to be stale or for other reasons not to accurately reflect fair value.
Arbitrage opportunities may exist when trading in a portfolio security or securities is halted and does not resume before a fund calculates its NAV. These arbitrage opportunities may enable short-term traders to dilute the NAV of long-term investors. Securities trading in overseas markets, if applicable, present time zone arbitrage opportunities when events affecting portfolio security values occur after the close of the overseas markets but prior to the close of the U.S. market. Fair valuation of a fund's portfolio securities can serve to reduce arbitrage opportunities available to short-term traders, but there is no assurance that fair value pricing policies will prevent dilution of NAV by short-term traders.
Fair value pricing is based on subjective judgments and it is possible that the fair value of a security may differ materially from the value that would be realized if the security were sold.
 
Shareholder Information
Additional Information about the Purchase and Sale of Shares
 
NOT AVAILABLE FOR SALE TO THE GENERAL PUBLIC.
As used in this prospectus, the term "shares" generally refers to the shares offered through this prospectus.
Shares are offered exclusively to certain clients of the Adviser or its affiliates. If you are not currently a client in a discretionary investment program offered by the Adviser or its affiliates, please call 1-800-544-3455 (9:00 a.m. - 6:00 p.m. Eastern time, Monday through Friday) for more information. Additional fees apply for discretionary investment programs. For more information on these fees, please refer to the "Buying and Selling Information" section of the Statement of Additional Information (SAI). 
The fund may reject for any reason, or cancel as permitted or required by law, any purchase orders.
Excessive trading of fund shares can harm shareholders in various ways, including reducing the returns to long-term shareholders by increasing costs to the fund (such as brokerage commissions or spreads paid to dealers who sell money market instruments), disrupting portfolio management strategies, and diluting the value of the shares in cases in which fluctuations in markets are not fully priced into the fund's NAV.
Because investments in the fund can only be made by the Adviser or an affiliate on behalf of its clients, the potential for excessive or short-term disruptive purchases and sales is reduced. Accordingly, the Board of Trustees has not adopted policies and procedures designed to discourage excessive trading of fund shares and the fund accommodates frequent trading.  
The fund does not place a limit on purchases or sales of fund shares by the Adviser or its affiliates. The fund reserves the right, but does not have the obligation, to reject any purchase transaction at any time. In addition, the fund reserves the right to impose restrictions on disruptive, excessive, or short-term trading. 
The fund has no exchange privilege with any other fund.
There is no minimum balance or purchase minimum for fund shares.
The price to buy one share is its NAV. Shares are sold without a sales charge.
Shares will be bought at the NAV next calculated after an order is received in proper form.
Shares are generally available only to investors residing in the United States.
The fund may stop offering shares completely or may offer shares only on a limited basis, for a period of time or permanently.
Under applicable anti-money laundering rules and other regulations, purchase orders may be suspended, restricted, or canceled and the monies may be withheld.
The price to sell one share is its NAV.
Shares will be sold at the NAV next calculated after an order is received in proper form.
Normally, redemptions will be processed by the next business day, but it may take up to seven days to pay the redemption proceeds if making immediate payment would adversely affect the fund.
See "Policies Concerning the Redemption of Fund Shares" below for additional redemption information.
Redemptions may be suspended or payment dates postponed when the NYSE is closed (other than weekends or holidays), when trading on the NYSE is restricted, or as permitted by the SEC.
Redemption proceeds may be paid in securities or other property rather than in cash if the Adviser determines it is in the best interests of the fund.
When you terminate your relationship with the Adviser, or one of its affiliates, your shares may be sold at the NAV next calculated, in which case proceeds from such redemption would be sent to you.
Under applicable anti-money laundering rules and other regulations, redemption requests may be suspended, restricted, canceled, or processed and the proceeds may be withheld.
If applicable, orders by funds of funds for which the Adviser or its affiliates serve as investment manager will be treated as received by the fund at the same time that the corresponding orders are received in proper form by the funds of funds.
Policies Concerning the Redemption of Fund Shares
If your account is held directly with a fund, the length of time that a fund typically expects to pay redemption proceeds depends on the method you have elected to receive such proceeds. A fund typically expects to make payment of redemption proceeds by wire, automated clearing house (ACH) or by issuing a check by the next business day following receipt of a redemption order in proper form. Proceeds from the periodic and automatic sale of shares of a Fidelity® money market fund that are used to buy shares of another Fidelity® fund are settled simultaneously.
If your account is held through an intermediary, the length of time that a fund typically expects to pay redemption proceeds depends, in part, on the terms of the agreement in place between the intermediary and a fund. For redemption proceeds that are paid either directly to you from a fund or to your intermediary for transmittal to you, a fund typically expects to make payments by wire, by ACH or by issuing a check on the next business day following receipt of a redemption order in proper form from the intermediary by a fund. Redemption orders that are processed through investment professionals that utilize the National Securities Clearing Corporation will generally settle one to three business days following receipt of a redemption order in proper form.
As noted elsewhere, payment of redemption proceeds may take longer than the time a fund typically expects and may take up to seven days from the date of receipt of the redemption order as permitted by applicable law.
Redemption Methods Available. Generally a fund expects to pay redemption proceeds in cash. To do so, a fund typically expects to satisfy redemption requests either by using available cash (or cash equivalents) or by selling portfolio securities. On a less regular basis, a fund may also satisfy redemption requests by utilizing one or more of the following sources, if permitted: borrowing from another Fidelity® fund; drawing on an available line or lines of credit from a bank or banks; or using reverse repurchase agreements. These methods may be used during both normal and stressed market conditions.
In addition to paying redemption proceeds in cash, a fund reserves the right to pay part or all of your redemption proceeds in readily marketable securities instead of cash (redemption in-kind). Redemption in-kind proceeds will typically be made by delivering the selected securities to the redeeming shareholder within seven days after the receipt of the redemption order in proper form by a fund.
Dividends and Capital Gain Distributions
 
The fund earns interest, dividends, and other income from its investments, and distributes this income (less expenses) to shareholders as dividends. The fund also realizes capital gains from its investments, and distributes these gains (less any losses) to shareholders as capital gain distributions.
The fund normally declares dividends and pays capital gain distributions per the tables below:
Fund Name
 
Dividends Paid
Fidelity® SAI Small-Mid Cap 500 Index Fund
 
September, December
Fund Name
 
Capital Gains Paid
Fidelity® SAI Small-Mid Cap 500 Index Fund
 
September, December
Distribution Options 
Any dividends and capital gain distributions may be reinvested in additional shares or paid in cash. 
Tax Consequences
 
As with any investment, your investment in the fund could have tax consequences for you (for non-retirement accounts).
Taxes on Distributions
Distributions you receive from the fund are subject to federal income tax, and may also be subject to state or local taxes.
For federal tax purposes, certain distributions, including dividends and distributions of short-term capital gains, are taxable to you as ordinary income, while certain distributions, including distributions of long-term capital gains, are taxable to you generally as capital gains. A percentage of certain distributions of dividends may qualify for taxation at long-term capital gains rates (provided certain holding period requirements are met). 
If the Adviser buys shares on your behalf when a fund has realized but not yet distributed income or capital gains, you will be "buying a dividend" by paying the full price for the shares and then receiving a portion of the price back in the form of a taxable distribution.
Any taxable distributions you receive from the fund will normally be taxable to you when you receive them, regardless of your distribution option.
Taxes on Transactions
Your redemptions may result in a capital gain or loss for federal tax purposes. A capital gain or loss on your investment in the fund generally is the difference between the cost of your shares and the price you receive when you sell them.
Fund Services
Fund Management
 
The fund is a mutual fund, an investment that pools shareholders' money and invests it toward a specified goal.
Adviser
FMR. The Adviser is the fund's manager. The address of the Adviser is 245 Summer Street, Boston, Massachusetts 02210.
As of December 31, 2022, the Adviser had approximately $3.1 trillion in discretionary assets under management, and approximately $3.9 trillion when combined with all of its affiliates' assets under management.
As the manager, the Adviser is responsible for handling the fund's business affairs.
Sub-Adviser(s)
Geode, at 100 Summer Street, 12th Floor, Boston, Massachusetts 02110, serves as a sub-adviser for the fund. As of December 31, 2022, Geode had approximately $803.4 billion in discretionary assets under management.
Geode chooses the fund's investments and places orders to buy and sell the fund's investments.
Portfolio Manager(s)
Louis Bottari is Senior Portfolio Manager of Fidelity® SAI Small-Mid Cap 500 Index Fund, which he has managed since 2015. He also manages other funds. Since joining Geode in 2008, Mr. Bottari has worked as an assistant portfolio manager, portfolio manager, and senior portfolio manager.
Peter Matthew is Senior Portfolio Manager of Fidelity® SAI Small-Mid Cap 500 Index Fund, which he has managed since 2015. He also manages other funds. Since joining Geode in 2007, Mr. Matthew has worked as a senior operations associate, portfolio manager assistant, assistant portfolio manager, portfolio manager, and senior portfolio manager.
Robert Regan is Portfolio Manager of Fidelity® SAI Small-Mid Cap 500 Index Fund, which he has managed since 2016. He also manages other funds. Since joining Geode in 2016, Mr. Regan has worked as a portfolio manager.
Payal Gupta is Portfolio Manager of Fidelity® SAI Small-Mid Cap 500 Index Fund, which she has managed since 2019. She also manages other funds. Since joining Geode in 2019, Ms. Gupta has worked as a portfolio manager. Prior to joining Geode, Ms. Gupta worked at State Street Global Advisors from 2005 to 2019, most recently as senior portfolio manager.
Navid Sohrabi is Portfolio Manager of Fidelity® SAI Small-Mid Cap 500 Index Fund, which he has managed since 2019. He also manages other funds. Since joining Geode in 2019, Mr. Sohrabi has worked as a portfolio manager. Prior to joining Geode, Mr. Sohrabi worked at DWS, most recently as an index portfolio manager.
The SAI provides additional information about the compensation of, any other accounts managed by, and any fund shares held by the portfolio manager(s). 
From time to time a manager, analyst, or other Fidelity employee may express views regarding a particular company, security, industry, or market sector. The views expressed by any such person are the views of only that individual as of the time expressed and do not necessarily represent the views of Fidelity or any other person in the Fidelity organization. Any such views are subject to change at any time based upon market or other conditions and Fidelity disclaims any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any fund. 
Advisory Fee(s)
The fund pays a management fee to the Adviser.
The management fee is calculated and paid to the Adviser every month.
The annual management fee rate, as a percentage of the fund's average net assets, is shown in the following table:
Fund
Management Fee Rate
Fidelity® SAI Small-Mid Cap 500 Index Fund
0.11%
The Adviser pays Geode for providing investment management services.
The basis for the Board of Trustees approving the management contract and sub-advisory agreement for the fund is available in the fund's semi-annual report for the fiscal period ended January 31, 2023.
From time to time, the Adviser or its affiliates may agree to reimburse or waive certain fund expenses while retaining the ability to be repaid if expenses fall below the specified limit prior to the end of the fiscal year.
Reimbursement or waiver arrangements can decrease expenses and boost performance.
Fund Distribution
 
FDC distributes the fund's shares.
Distribution and Service Plan(s)
The fund has adopted a Distribution and Service Plan pursuant to Rule 12b-1 under the Investment Company Act of 1940 (1940 Act) with respect to its shares that recognizes that the Adviser may use its management fee revenues, as well as its past profits or its resources from any other source, to pay FDC for expenses incurred in connection with providing services intended to result in the sale of shares of the fund and/or shareholder support services. The Adviser, directly or through FDC, may pay significant amounts to intermediaries that provide those services. Currently, the Board of Trustees of the fund has authorized such payments for shares of the fund.
Affiliates of the Adviser may receive service fees or distribution fees or both with respect to underlying funds that participate in Fidelity's FundsNetwork®.
If payments made by the Adviser to FDC or to intermediaries under the Distribution and Service Plan were considered to be paid out of the fund's assets on an ongoing basis, they might increase the cost of your investment and might cost you more than paying other types of sales charges.
No dealer, sales representative, or any other person has been authorized to give any information or to make any representations, other than those contained in this prospectus and in the related SAI, in connection with the offer contained in this prospectus. If given or made, such other information or representations must not be relied upon as having been authorized by the fund or FDC. This prospectus and the related SAI do not constitute an offer by the fund or by FDC to sell shares of the fund to, or to buy shares of the fund from, any person to whom it is unlawful to make such offer.
 
Appendix
Financial Highlights
 
 
Financial Highlights are intended to help you understand the financial history of fund shares for the past 5 years (or, if shorter, the period of operations). Certain information reflects financial results for a single share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in shares (assuming reinvestment of all dividends and distributions). The annual information has been audited by Deloitte & Touche LLP, independent registered public accounting firm, whose report, along with fund financial statements, is included in the annual report. Annual reports are available for free upon request. 
 
 
Fidelity® SAI Small-Mid Cap 500 Index Fund
 
Years ended July 31,
 
2023  
 
2022 
 
2021  
 
2020 
 
2019 
  Selected Per-Share Data 
 
 
 
 
 
 
 
 
 
 
  Net asset value, beginning of period
$
9.84
$
16.46
$
12.19
$
12.80
$
12.95
  Income from Investment Operations
 
 
 
 
 
 
 
 
 
 
     Net investment income (loss) A,B
 
.10
 
.16
 
.20
 
.20
 
.19
     Net realized and unrealized gain (loss)
 
.38
 
(1.07)
 
5.09
 
(.20) C
 
.46
  Total from investment operations
 
.48  
 
(.91)  
 
5.29  
 
-  
 
.65
  Distributions from net investment income
 
(.11)
 
(.22)
 
(.17)
 
(.22)
 
(.18)
  Distributions from net realized gain
 
(4.15)
 
(5.48)
 
(.85)
 
(.39)
 
(.63)
     Total distributions
 
(4.25) D
 
(5.71) D
 
(1.02)
 
(.61)
 
(.80) D
  Net asset value, end of period
$
6.07
$
9.84
$
16.46
$
12.19
$
12.80
 Total Return E
 
8.32%
 
(8.94)%
 
46.99%
 
(.03)% C
 
5.26%
 Ratios to Average Net Assets B,F,G
 
 
 
 
 
 
 
 
 
 
    Expenses before reductions
 
.15%
 
.14%
 
.13%
 
.13%
 
.22%
    Expenses net of fee waivers, if any
 
.06%
 
.05%
 
.05%
 
.05%
 
.08%
    Expenses net of all reductions
 
.06%
 
.05%
 
.05%
 
.05%
 
.08%
    Net investment income (loss)
 
1.77%
 
1.35%
 
1.37%
 
1.66%
 
1.53%
 Supplemental Data
 
 
 
 
 
 
 
 
 
 
    Net assets, end of period (000 omitted)
$
1,610,937
$
246,496
$
1,087,415
$
1,921,810
$
1,862,285
    Portfolio turnover rate H
 
76%
 
93%
 
69%
 
79%
 
41%
 
ACalculated based on average shares outstanding during the period.
 
BNet investment income (loss) is affected by the timing of the declaration of dividends by any underlying mutual funds or exchange-traded funds (ETFs). Net investment income (loss) of any mutual funds or ETFs is not included in the Fund's net investment income (loss) ratio.
 
CAmount includes a reimbursement from the investment adviser for an operational error which amounted to less than $.02 per share. Excluding this reimbursement, the total return would have been (.16)%.
 
DTotal distributions per share do not sum due to rounding.
 
ETotal returns would have been lower if certain expenses had not been reduced during the applicable periods shown.
 
FFees and expenses of any underlying mutual funds or exchange-traded funds (ETFs) are not included in the Fund's expense ratio. The Fund indirectly bears its proportionate share of these expenses. For additional expense information related to investments in Fidelity Central Funds, please refer to the "Investments in Fidelity Central Funds" note found in the Notes to Financial Statements section of the most recent Annual or Semi-Annual report.
 
GExpense ratios reflect operating expenses of the class. Expenses before reductions do not reflect amounts reimbursed, waived, or reduced through arrangements with the investment adviser, brokerage services, or other offset arrangements, if applicable, and do not represent the amount paid by the class during periods when reimbursements, waivers or reductions occur.
 
HAmount does not include the portfolio activity of any underlying mutual funds or exchange-traded funds (ETFs).
 
 
Additional Index Information
 
Russell SMID 500TM Index is a custom index that measures the performance of the largest securities within the Russell 2500TM Index. The Russell 2500TM Index measures the performance of the small to mid-cap segment of the U.S. equity universe, commonly referred to as "smid" cap. The Russell SMID 500TM Index includes approximately 500 of the largest securities based on a combination of their market cap and current index membership. It is constructed to provide a comprehensive and unbiased barometer for the largest 500 securities held within the smid cap segment. The index is completely reconstituted annually to ensure the performance and characteristics remain representative of the true opportunity set.
Source: London Stock Exchange Group plc and its group undertakings (collectively, the "LSE Group"). © LSE Group 2023. FTSE Russell is a trading name of certain of the LSE Group companies. "Russell®" is/are a trademark(s) of the relevant LSE Group companies and is/are used by any other LSE Group company under license. All rights in the FTSE Russell indexes or data vest in the relevant LSE Group company which owns the index or the data. Neither LSE Group nor its licensors accept any liability for any errors or omissions in the indexes or data and no party may rely on any indexes or data contained in this communication. No further distribution of data from the LSE Group is permitted without the relevant LSE Group company's express written consent. The LSE Group does not promote, sponsor or endorse the content of this communication.
 
IMPORTANT INFORMATION ABOUT OPENING A NEW ACCOUNT
To help the government fight the funding of terrorism and money laundering activities, the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (USA PATRIOT ACT), requires all financial institutions to obtain, verify, and record information that identifies each person or entity that opens an account.
For individual investors opening an account: When you open an account, you will be asked for your name, address, date of birth, and other information that will allow Fidelity to identify you. You may also be asked to provide documents that may help to establish your identity, such as your driver's license.
For investors other than individuals: When you open an account, you will be asked for the name of the entity, its principal place of business and taxpayer identification number (TIN). You will be asked to provide information about the entity's control person and beneficial owners, and person(s) with authority over the account, including name, address, date of birth and social security number. You may also be asked to provide documents, such as drivers' licenses, articles of incorporation, trust instruments or partnership agreements and other information that will help Fidelity identify the entity.
You can obtain additional information about the fund. A description of the fund's policies and procedures for disclosing its holdings is available in its Statement of Additional Information (SAI) and on Fidelity's web sites. The SAI also includes more detailed information about the fund and its investments. The SAI is incorporated herein by reference (legally forms a part of the prospectus). The fund's annual and semi-annual reports also include additional information. The fund's annual report includes a discussion of the fund's holdings and recent market conditions and the fund's investment strategies that affected performance.
For a free copy of any of these documents or to request other information or ask questions about the fund, call Fidelity at 1-800-544-3455. In addition, you may visit Fidelity's web site at www.fidelity.com for a free copy of a prospectus, SAI, or annual or semi-annual report or to request other information.
The SAI, the fund's annual and semi-annual reports and other related materials are available from the Electronic Data Gathering, Analysis, and Retrieval (EDGAR) Database on the SEC's web site (http://www.sec.gov). You can obtain copies of this information, after paying a duplicating fee, by sending a request by e-mail to [email protected] or by writing the Public Reference Section of the SEC, Washington, D.C. 20549-1520. You can also review and copy information about the fund, including the fund's SAI, at the SEC's Public Reference Room in Washington, D.C. Call 1-202-551-8090 for information on the operation of the SEC's Public Reference Room.
Investment Company Act of 1940, File Number(s), 811-02105  
Fidelity Distributors Company LLC (FDC) is a member of the Securities Investor Protection Corporation (SIPC). You may obtain information about SIPC, including the SIPC brochure, by visiting www.sipc.org or calling SIPC at 202-371-8300.
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