PROSPECTUS   |   FEBRUARY 17, 2023, AS REVISED MAY 9, 2023

The AB Active ETFs

The Securities and Exchange Commission has not approved or disapproved these securities or passed upon the adequacy of this Prospectus. Any representation to the contrary is a criminal offense.

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Investment Products Offered

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SUMMARY INFORMATION

AB US Low Volatility Equity ETF

INVESTMENT OBJECTIVE

The Fund’s investment objective is capital appreciation with an emphasis on lower volatility compared to the broader equity market.

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 be required to pay commissions and/or other forms of compensation to a broker for transactions in shares, which are not reflected in the tables or the examples below.

Shareholder Fees (fees paid directly from your investment)

None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Examples

The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Examples assume that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Examples also assume that your investment has a 5% return each year and that the Fund’s operating expenses stay the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys or 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 transaction costs, which are not reflected in the Annual Fund Operating Expenses or in the Examples, affect the Fund’s performance. The Fund has no operating history and therefore has no portfolio turnover information.

PRINCIPAL STRATEGIES

The Fund is an actively-managed exchange-traded fund (“ETF”). The Adviser seeks to achieve the Fund’s investment objective by investing, under normal circumstances, at least 80% of its net assets in the equity securities of U.S. companies. A company is considered to be a U.S. company if: (i) the company is domiciled or organized in the U.S.; (ii) the company has securities that are traded principally in the U.S.; or (iii) the company conducts a substantial part of its economic activities in the U.S. The Fund may also invest to a lesser degree in the equity securities of non-U.S. companies.

The Fund invests in companies that are determined by the Adviser to offer favorable long-term sustainable profitability, price stability, and attractive valuations. The Adviser employs an integrated approach that combines both fundamental and quantitative research to identify attractive investment opportunities. Factors that the Adviser considers in this regard include: a company’s record and projections of profitability, accuracy and availability of information with respect to the company, success and experience of management, competitive advantage, low stock price volatility, and liquidity of the company’s securities. The Adviser compares these results to the characteristics of the general stock markets to determine the relative attractiveness of each company at a given

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time. The Adviser weighs economic, political and market factors in making investment decisions. The Adviser seeks to manage the Fund so that it is subject to less share price volatility than other funds investing in U.S. equity securities, although there can be no guarantee that the Adviser will be successful in this regard.

The Fund primarily invests in mid- and large-capitalization companies, which are currently defined for the Fund as companies that have market capitalizations of $2 billion or more.

The Fund is “non-diversified.”

PRINCIPAL RISKS

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As with all investments, you may lose money by investing in the Fund.

BAR CHART AND PERFORMANCE INFORMATION

No performance information is presented for the Fund because it has not yet been in operation for a full calendar year.

INVESTMENT ADVISER

AllianceBernstein L.P. is the investment adviser for the Fund.

PORTFOLIO MANAGER

The following table lists the person responsible for day-to-day management of the Fund’s portfolio:

PURCHASE AND SALE OF FUND SHARES

The Fund is an actively-managed ETF and does not seek to track the performance of an index. Individual shares of the Fund are listed on the Exchange. Most investors will buy and sell shares of the Fund through a broker-dealer. The price of Fund shares is based on market price, and because ETF shares trade at market prices rather than at NAV, shares may trade at a price greater than NAV (a premium) or less than NAV (a discount). The Fund will only issue or redeem shares that have been aggregated into blocks of 10,000 shares or multiples thereof (“Creation Units”) to a limited number of Authorized Participants who have entered into agreements with the Fund’s distributor. The Fund generally will issue or redeem Creation Units in return for a designated basket of portfolio securities and/or cash that the Fund specifies each day. To the extent the Fund’s Creation Units are issued or redeemed for cash, the Fund may incur brokerage expenses, transaction and other costs, and/or capital gains, which may or may not be offset, in whole or in part, by a transaction fee paid by an Authorized Participant.

Information about the Fund’s NAV, market price, premiums and discounts, and bid-ask spreads are available on the Fund’s website at www.abfunds.com.

TAX INFORMATION

The Fund may pay income dividends or make capital gains distributions, which may be subject to federal income taxes and taxable as ordinary income or capital gains, and may also be subject to state and local taxes.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

The Adviser and its affiliates make payments to brokers, dealers and other financial intermediaries for the sale of Fund shares and other services. These payments may create a conflict of interest by influencing the broker, dealer or other financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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AB US High Dividend ETF

INVESTMENT OBJECTIVE

The Fund’s investment objective is current income and 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 be required to pay commissions and/or other forms of compensation to a broker for transactions in shares, which are not reflected in the tables or the examples below.

Shareholder Fees (fees paid directly from your investment)

None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Examples

The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Examples assume that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Examples also assume that your investment has a 5% return each year and that the Fund’s operating expenses stay the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys or 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 transaction costs, which are not reflected in the Annual Fund Operating Expenses or in the Examples, affect the Fund’s performance. While the Fund has not commenced operations and therefore has no portfolio turnover information, the Fund expects that its portfolio turnover will be higher than 100% of the average value of its portfolio.

PRINCIPAL STRATEGIES

The Fund is an actively-managed exchange-traded fund (“ETF”). The Adviser seeks to achieve the Fund’s investment objective by investing, under normal circumstances, at least 80% of its net assets in the equity securities of U.S. companies. A company is considered to be a U.S. company if: (i) the company is domiciled or organized in the U.S.; (ii) the company has securities that are traded principally in the U.S.; or (iii) the company conducts a substantial part of its economic activities in the U.S. The Fund may also invest to a lesser degree in the equity securities of non-U.S. companies. The Fund primarily invests in dividend-paying equity securities.

The Fund invests in companies that are determined to be attractive by the Adviser with an emphasis on income generation.

The Adviser employs a systematic approach to identify attractive companies that pay dividends and have the potential for long-term capital generation. Using this approach, the Adviser systematically analyzes thousands of companies across styles and sectors to identify factors that are complementary to the payment of high dividends with the goal of consistently delivering returns and income. Factors that the Adviser considers in this regard include quantitative metrics such as dividend yield, balance sheet quality, price momentum, among others. While its emphasis is on investing in companies that currently pay a dividend, the Adviser may also

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invest in non-dividend paying companies. The Fund primarily invests in mid- and large-capitalization companies, which are currently defined for the Fund as companies that have market capitalizations of $2 billion or more. The Fund may use derivatives, such as options, futures contracts, forwards, and swaps, for hedging (reducing risks), efficient portfolio management and other investment purposes.

The Fund is “non-diversified.”

PRINCIPAL RISKS

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As with all investments, you may lose money by investing in the Fund.

BAR CHART AND PERFORMANCE INFORMATION

No performance information is presented for the Fund because it has not yet been in operation for a full calendar year.

INVESTMENT ADVISER

AllianceBernstein L.P. is the investment adviser for the Fund.

PORTFOLIO MANAGERS

The following table lists the persons responsible for day-to-day management of the Fund’s portfolio:

PURCHASE AND SALE OF FUND SHARES

The Fund is an actively-managed ETF and does not seek to track the performance of an index. Individual shares of the Fund are listed on the Exchange. Most investors will buy and sell shares of the Fund through a broker-dealer. The price of Fund shares is based on market price, and because ETF shares trade at market prices rather than at NAV, shares may trade at a price greater than NAV (a premium) or less than NAV (a discount). The Fund will only issue or redeem shares that have been aggregated into blocks of 20,000 shares or multiples thereof (“Creation Units”) to a limited number of Authorized Participants who have entered into agreements with the Fund’s distributor. The Fund generally will issue or redeem Creation Units in return for a designated basket of portfolio securities and/or cash that the Fund specifies each day. To the extent the Fund’s Creation Units are issued or redeemed for cash, the Fund may incur brokerage expenses, transaction and other costs, and/or capital gains, which may or may not be offset, in whole or in part, by a transaction fee paid by an Authorized Participant.

Information about the Fund’s NAV, market price, premiums and discounts, and bid-ask spreads are available on the Fund’s website at www.abfunds.com.

TAX INFORMATION

The Fund may pay income dividends or make capital gains distributions, which may be subject to federal income taxes and taxable as ordinary income or capital gains, and may also be subject to state and local taxes.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

The Adviser and its affiliates make payments to brokers, dealers and other financial intermediaries for the sale of Fund shares and other services. These payments may create a conflict of interest by influencing the broker, dealer or other financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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AB Disruptors ETF

INVESTMENT OBJECTIVE

The Fund’s investment objective is 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 be required to pay commissions and/or other forms of compensation to a broker for transactions in shares, which are not reflected in the tables or the examples below.

Shareholder Fees (fees paid directly from your investment)

None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Examples

The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Examples assume that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Examples also assume that your investment has a 5% return each year and that the Fund’s operating expenses stay the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys or 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 transaction costs, which are not reflected in the Annual Fund Operating Expenses or in the Examples, affect the Fund’s performance. The Fund has no operating history and therefore has no portfolio turnover information.

PRINCIPAL STRATEGIES

The Fund is an actively-managed exchange-traded fund (“ETF”). The Adviser seeks to achieve the Fund’s investment objective by investing, under normal circumstances, in a global portfolio of equity securities. The Fund invests in companies of all market capitalizations, and invests globally in companies located in various developed and emerging market countries.

In pursuing the Fund’s investment objective, the Adviser will invest the Fund’s assets in the securities of companies that it considers to offer good prospects for attractive returns relative to general equity markets. The Adviser seeks to invest in “disruptive” innovation leaders, which are companies that are at the forefront of global innovation through the use of technology to change the status quo in the markets for their products or services, to develop new products, to enhance existing products or to develop or improve creative solutions that increase demand for their products. The Fund may invest in companies in any sector or industry, although the Adviser’s focus on innovation leaders may result in substantial investment in companies operating in one or more industries within the information technology sector.

The Adviser’s research process combines top-down evaluation of innovative growth trends with fundamental bottom-up analysis that seeks to identify companies that are true innovators in their field and offer durable growth prospects. The factors that the Adviser considers as part of its fundamental analysis include, among others, a company’s current profitability, projected future profitability, growth prospects, competitive position, pricing power, technological advantage, and strength of management.

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Currency fluctuations can have a dramatic impact on equity returns, significantly adding to returns in some years and greatly diminishing them in others. The Fund will not typically hedge its currency exposure.

The Fund is “non-diversified.”

PRINCIPAL RISKS

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As with all investments, you may lose money by investing in the Fund.

BAR CHART AND PERFORMANCE INFORMATION

No performance information is presented for the Fund because it has not yet been in operation for a full calendar year.

INVESTMENT ADVISER

AllianceBernstein L.P. is the investment adviser for the Fund.

PORTFOLIO MANAGER

The following table lists the person responsible for day-to-day management of the Fund’s portfolio:

PURCHASE AND SALE OF FUND SHARES

The Fund is an actively-managed ETF and does not seek to track the performance of an index. Individual shares of the Fund are listed on the Exchange. Most investors will buy and sell shares of the Fund through a broker-dealer. The price of Fund shares is based on market price, and because ETF shares trade at market prices rather than at NAV, shares may trade at a price greater than NAV (a premium) or less than NAV (a discount). The Fund will only issue or redeem shares that have been aggregated into blocks of 10,000 shares or multiples thereof (“Creation Units”) to a limited number of Authorized Participants who have entered into agreements with the Fund’s distributor. The Fund generally will issue or redeem Creation Units in return for a designated basket of portfolio securities and/or cash that the Fund specifies each day. To the extent the Fund’s Creation Units are issued or redeemed for cash, the Fund may incur brokerage expenses, transaction and other costs, and/or capital gains, which may or may not be offset, in whole or in part, by a transaction fee paid by an Authorized Participant.

Information about the Fund’s NAV, market price, premiums and discounts, and bid-ask spreads are available on the Fund’s website at www.abfunds.com.

TAX INFORMATION

The Fund may pay income dividends or make capital gains distributions, which may be subject to federal income taxes and taxable as ordinary income or capital gains, and may also be subject to state and local taxes.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

The Adviser and its affiliates make payments to brokers, dealers and other financial intermediaries for the sale of Fund shares and other services. These payments may create a conflict of interest by influencing the broker, dealer or other financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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ADDITIONAL INFORMATION ABOUT THE FUNDS’ STRATEGIES, RISKS AND INVESTMENTS

Below is additional information about the Funds’ investment strategies, practices and related risks, including principal and non-principal strategies and risks. Most of these investment practices are discretionary, which means that the Adviser may or may not decide to use them. This section does not describe all of a Fund’s investment practices that are non-principal strategies or all of the related risks of such strategies. Each Fund’s principal strategies and risks are described in its summary prospectus in the Summary Information section above, and additional information about each Fund’s risks and investments can be found in the Funds’ Statement of Additional Information (“SAI”).

ESG Integration

The Adviser integrates environmental, social and corporate governance (“ESG”) considerations into its research and investments analysis with the goal of maximizing return and considering risk within the Fund’s investment objective and strategies. Combining third-party ESG data with its own views and research, the Adviser analyzes the ESG practices of companies and issuers to identify potentially material ESG factors that can vary across companies and issuers. ESG considerations may include but are not limited to environmental impact, corporate governance and ethical business practices. ESG considerations may not be applicable to all types of instruments or investments.

Market Risk

The market value of a security may move up or down, sometimes rapidly and unpredictably. These fluctuations may cause a security to be worth less than the price originally paid for it, or less than it was worth at an earlier time. Market risk may affect a single issuer, industry, sector of the economy or the market as a whole. Global economies and financial markets are increasingly interconnected, which increases the probabilities that conditions in one country or region might adversely impact issuers in a different country or region. Conditions affecting the general economy, including interest rate levels and political, social, or economic instability at the local, regional, or global level may also affect the market value of a security. Health crises, such as pandemic and epidemic diseases, as well as other incidents that interrupt the expected course of events, such as natural disasters, including fires, earthquakes and flooding, war or civil disturbance, acts of terrorism, supply chain disruptions, power outages and other unforeseeable and external events, and the public response to or fear of such diseases or events, have had, and may in the future have, an adverse effect on a Fund’s investments and net asset value (“NAV”) and can lead to increased market volatility. For example, the diseases or events themselves or any preventative or protective actions that governments may take in respect of such diseases or events may result in periods of business disruption, inability to obtain raw materials, supplies and component parts, and reduced or disrupted operations for a Fund’s portfolio companies. The occurrence and pendency of such diseases or events could adversely affect the economies and financial markets either in specific countries or worldwide. Rates of inflation have recently risen. The value of assets or income from an investment may be worth less in the future as inflation decreases the value of money. As inflation increases, the real value of a Fund’s assets may decline.

Derivatives

Each Fund may, but is not required to, use derivatives for hedging or other risk management purposes or as part of its investment strategies. Derivatives are financial contracts whose value depends on, or is derived from, the value of an underlying asset, reference rate or index. A Fund may use derivatives to earn income and enhance returns, to hedge or adjust the risk profile of its investments, to replace more traditional direct investments and to obtain exposure to otherwise inaccessible markets.

There are four principal types of derivatives—options, futures contracts, forwards and swaps—each of which is described below. Derivatives include listed and cleared transactions where a Fund’s derivatives trade counterparty is an exchange or clearinghouse, and non-cleared bilateral “over-the-counter” transactions that are privately negotiated and where the Fund’s derivative trade counterparty is a financial institution. Exchange-traded or cleared derivatives transactions tend to be subject to less counterparty credit risk than those that are bilateral and privately negotiated.

A Fund’s use of derivatives may involve risks that are different from, or possibly greater than, the risks associated with investing directly in securities or other more traditional instruments. These risks include the risk that the value of a derivative instrument may not correlate perfectly, or at all, with the value of the assets, reference rates, or indices that they are designed to track. Other risks include: the possible absence of a liquid secondary market for a particular instrument and possible exchange-imposed price fluctuation limits, either of which may make it difficult or impossible to close out a position when desired; and the risk that the counterparty will not perform its obligations. Certain derivatives may have a leverage component and involve leverage risk. Adverse changes in the value or level of the underlying asset, note or index can result in a loss substantially greater than the Fund’s investment (in some cases, the potential loss is unlimited).

The Funds’ investments in derivatives may include, but are not limited to, the following:

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If a Fund purchases or writes privately-negotiated options on securities, it will effect such transactions only with investment dealers and other financial institutions (such as commercial banks or savings and loan institutions) deemed creditworthy by the Adviser. The Adviser has adopted procedures for monitoring the creditworthiness of such counterparties.

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An option on a swap agreement, also called a “swaption”, is an option that gives the buyer the right, but not the obligation, to enter into a swap on a future date in exchange for paying a market-based “premium”. A receiver swaption gives the owner the right to receive the total return of a specified asset, reference rate, or index. A payer swaption gives the owner the right to pay the total return of a specified asset, reference rate, or index. Swaptions also include options that allow an existing swap to be terminated or extended by one of the counterparties.

The purchase of an interest rate cap entitles the purchaser, to the extent that a specified index exceeds a predetermined interest rate, to receive payments of interest on a contractually-based principal amount from the party selling the interest rate cap. The purchase of an interest rate floor entitles the purchaser, to the extent that a specified index falls below a predetermined interest rate, to receive payments of interest on an agreed principal amount from the party selling the interest rate floor. It may be more difficult for a Fund to trade or close out interest rate caps and floors in comparison to other types of swaps.

There is no limit on the amount of interest rate transactions that may be entered into by a Fund. The value of these transactions will fluctuate based on changes in interest rates.

Interest rate swap, swaption, cap and floor transactions may, for example, be used in an effort to preserve a return or spread on a particular investment or a portion of a Fund’s portfolio or to protect against an increase in the price of securities a Fund anticipates purchasing at a later date. Interest rate swaps may also be used to leverage a Fund’s investments by creating positions that are functionally similar to purchasing a municipal or other fixed-income security but may only require payments to a swap counterparty under certain circumstances and allow the Fund to efficiently increase (or decrease) its duration and income.

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Credit default swaps may involve greater risks than if a Fund had invested in the reference obligation directly. Credit default swaps are subject to general market risk and credit risk and may be illiquid.

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Other types of synthetic foreign equity securities in which a Fund may invest include covered warrants and low exercise price warrants. Covered warrants entitle the holder to purchase from the issuer, typically a financial institution, upon exercise, common stock of an international company or receive a cash payment (generally in U.S. Dollars). The issuer of the covered warrants usually owns the underlying security or has a mechanism, such as owning equity warrants on the underlying securities, through which it can obtain the underlying securities. The cash payment is calculated according to a predetermined formula, which is generally based on the difference between the value of the underlying security on the date of exercise and the strike price. Low exercise price warrants are warrants with an exercise price that is very low relative to the market price of the underlying instrument at the time of issue (e.g., one cent or less). The buyer of a low exercise price warrant effectively pays the full value of the underlying common stock at the outset. In the case of any exercise of warrants, there may be a time delay between the time a holder of warrants gives instructions to exercise and the time the price of the common stock relating to exercise or the settlement date is determined, during which time the price of the underlying security could change significantly. In addition, the exercise or settlement date of the warrants may be affected by certain market disruption events, such as difficulties relating to the exchange of a local currency into U.S. Dollars, the imposition of capital controls by a local jurisdiction or changes in the laws relating to foreign investments. These events could lead to a change in the exercise date or settlement currency of the warrants, or postponement of the settlement date. In some cases, if the market disruption events continue for a certain period of time, the warrants may become worthless, resulting in a total loss of the purchase price of the warrants.

A Fund will only acquire synthetic foreign equity securities issued by entities deemed to be creditworthy by the Adviser, which will monitor the creditworthiness of the issuers on an ongoing basis. Investments in these instruments involve the risk that the issuer of the instrument may default on its obligation to deliver the underlying security or cash in lieu thereof. These instruments may also be subject to illiquid investments risk because there may be a limited secondary market for trading the warrants. They are also subject, like other investments in foreign securities, to foreign (non-U.S.) risk and currency risk.

Convertible Securities

Prior to conversion, convertible securities have the same general characteristics as non-convertible debt securities, which generally provide a stable stream of income with generally higher yields than those of equity securities of the same or similar issuers. The price of a convertible security will normally vary with changes in the price of the underlying equity security, although the higher yield tends to make the convertible security less volatile than the underlying equity security. As with debt securities, the market value of convertible securities tends to decrease as interest rates rise and increase as interest rates decline. While convertible securities generally offer lower interest or dividend yields than non-convertible debt securities of similar quality, they offer investors the potential to benefit from increases in the market prices of the underlying common stock. Convertible debt securities that are rated Baa3 or lower by Moody’s Investors Service, Inc. or BBB- or lower by S&P Global Ratings or Fitch Ratings, or the equivalent rating by

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any other nationally recognized statistical rating organization, and comparable unrated securities may share some or all of the risks of debt securities with those ratings.

Forward Commitments

Forward commitments for the purchase or sale of securities may include purchases on a when-issued basis or purchases or sales on a delayed delivery basis. In some cases, a forward commitment may be conditioned upon the occurrence of a subsequent event, such as approval and consummation of a merger, corporate reorganization or debt restructuring or approval of a proposed financing by appropriate authorities (i.e., a “when, as and if issued” trade).

When forward commitments with respect to fixed-income securities are negotiated, the price, which is generally expressed in yield terms, is fixed at the time the commitment is made, but payment for and delivery of the securities take place at a later date. Securities purchased or sold under a forward commitment are subject to market fluctuation and no interest or dividends accrue to the purchaser prior to the settlement date. There is a risk of loss if the value of either a purchased security declines before the settlement date or the security sold increases before the settlement date. The use of forward commitments helps a Fund to protect against anticipated changes in interest rates and prices.

Illiquid Securities

Each Fund limits its investments in illiquid securities to 15% of its net assets. Under Rule 22e-4 under the Investment Company Act of 1940 (the “1940 Act”), the term “illiquid securities” means any security or investment that a Fund reasonably expects cannot be sold or disposed of in current market conditions in seven calendar days or less without the sale or disposition significantly changing the market value of the investment.

A Fund that invests in illiquid securities may not be able to sell such securities and may not be able to realize their full value upon sale. Restricted securities (securities subject to legal or contractual restrictions on resale) may be illiquid. Some restricted securities (such as securities issued pursuant to Rule 144A (“Rule 144A Securities”) under the Securities Act of 1933 (“Securities Act”) or certain commercial paper) may be more difficult to trade than other types of securities.

Investment in Other Exchange-Traded Funds and Other Investment Companies

Each of the Funds may invest in other investment companies, such as closed-end investment companies, unit investment trusts, other ETFs and other open-end investment companies, provided that the investment is consistent with the Fund’s investment policies and restrictions. A Fund’s investments in other investment companies will not exceed 10% of the Fund’s total assets. As a shareholder of another investment company, a Fund would bear, along with other shareholders, its pro rata portion of the other investment company’s expenses, including advisory fees. These expenses would be in addition to the management fee that each Fund bears directly in connection with its own operations. A Fund’s investments in other investment companies will comply with applicable 1940 Act rules.

A Fund’s investments in other investment companies may include money market funds managed by the Adviser, including the AB Government Money Market Portfolio, a series of AB Fixed-Income Shares, Inc. Investments in money market funds are not subject to the 10% limitation set forth above.

Investments in Initial Public Offering (“IPO”) Securities

The Funds may invest in securities of companies that are offered pursuant to an IPO. Investments in IPO securities involve greater risks than investments in shares of companies that have traded publicly on an exchange for extended periods of time. In addition to the risks associated with equity securities generally, IPO securities may be subject to additional risk due to one or more factors such as the absence of a prior public market, unseasoned trading in the securities, the small number of securities available for trading, the lack of investor knowledge of the company, the lack of an operating history of the company, dependence of the company on key personnel, suppliers or a limited number of customers and other factors. These factors may cause IPO shares to be volatile in price. While a Fund may hold IPO securities for a period of time, it may sell them in the aftermarket soon after the purchase, which could increase portfolio turnover and lead to increased expenses such as commissions and transaction costs. Investments in IPOs could have a dramatic impact on a Fund’s performance (higher or lower) if the Fund’s assets are relatively small. In addition, as a Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.

Investments in Certain Types of Privately Placed Securities

A Fund may invest in privately placed securities. Privately placed securities in which the Funds invest are typically equity securities of privately held companies that have not been offered to the public and are not publicly traded. Investments in privately placed securities may include venture capital investments, which are investments in new, early or late stage companies and are often funded by, or in connection with, venture capital firms. Investments in securities of privately held companies may present significant opportunities for capital appreciation but involve a high degree of risk that may result in significant decreases in the value of these investments. Privately held companies may not have established products, experienced management or earnings history. A Fund may not be able to sell such investments when the portfolio managers and/or investment personnel deem it appropriate to do so because the securities are not publicly traded. As such, these investments are generally considered to be illiquid until a company’s public offering (which may never occur) and are often subject to additional contractual restrictions on resale following any public offering that may prevent a Fund from selling its shares of these companies for a period of time. Market conditions, developments within a company, investor perception or regulatory decisions may adversely affect a privately held company and delay or prevent a privately held company from ultimately offering its securities to the public. If a Fund invests in privately placed securities, it may incur additional expenses, such as

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valuation-related expenses, in connection with such investments. Public companies may also issue privately placed securities, which may be illiquid and subject to contractual restrictions on resale.

LIBOR Transition and Associated Risk

A Fund may be exposed to debt securities, derivatives or other financial instruments that utilize the London Interbank Offered Rate, or “LIBOR,” as a “benchmark” or “reference rate” for various interest rate calculations. In 2017, the FCA announced a desire to phase out the use of LIBOR by the end of 2021. As announced by the FCA and LIBOR’s administrator, ICE Benchmark Administration, most LIBOR settings (which reflect LIBOR rates quoted in different currencies over various time periods) have not been published since the end of 2021, but the most widely used U.S. Dollar LIBOR settings are expected to continue to be published until June 30, 2023. However, banks were strongly encouraged to cease entering into agreements with counterparties referencing LIBOR by the end of 2021. It is possible that a subset of LIBOR settings will be published after these dates on a “synthetic” basis, but any such publications would be considered non-representative of the underlying market. Since 2018 the Federal Reserve Bank of New York has published the Secured Overnight Financing Rate (referred to as SOFR), which is intended to replace U.S. Dollar LIBOR. SOFR is a broad measure of the cost of borrowing cash overnight collateralized by U.S. Treasury securities in the repurchase agreement (repo) market and has been used increasingly on a voluntary basis in new instruments and transactions. In addition, on March 15, 2022, the Adjustable Interest Rate Act was signed into law. This law provides a statutory fallback mechanism to replace LIBOR with a benchmark rate that is selected by the Federal Reserve Board and based on SOFR for certain contracts that reference LIBOR without adequate fallback provisions. On December 16, 2022, the Federal Reserve Board adopted regulations implementing the law by identifying benchmark rates based on SOFR that will replace LIBOR in different categories of financial contracts after June 30, 2023. The regulations include provisions that (i) provide a safe harbor for selection or use of a replacement benchmark rate selected by the Federal Reserve Board; (ii) clarify who may choose the replacement benchmark rate selected by the Federal Reserve Board; and (iii) ensure that contracts with a replacement benchmark rate selected by the Federal Reserve Board will not be interrupted or terminated following the replacement of LIBOR.

The elimination of LIBOR or changes to other reference rates or any other changes or reforms to the determination or supervision of reference rates could have an adverse impact on the market for, or value of, any securities or payments linked to those reference rates, which may adversely affect a Fund’s performance and/or NAV. Uncertainty and risk also remain regarding the willingness and ability of issuers and lenders to include revised provisions in new and existing contracts or instruments. Consequently, the transition from LIBOR to other reference rates may lead to increased volatility and illiquidity in markets that are tied to LIBOR, fluctuations in values of LIBOR-related investments or investments in issuers that utilize LIBOR, increased difficulty in borrowing or refinancing and diminished effectiveness of hedging strategies, potentially adversely affecting a Fund’s performance. Furthermore, the risks associated with the expected discontinuation of LIBOR and transition may be exacerbated if the work necessary to effect an orderly transition to an alternative reference rate is not completed in a timely manner. Neither the effect of the LIBOR transition process nor its ultimate success can yet be known.

Loans of Portfolio Securities

For the purpose of achieving income, a Fund may make loans of portfolio securities to brokers, dealers and financial institutions (“borrowers”) to the extent permitted under the 1940 Act or the rules and regulations thereunder (as such statute, rules or regulations may be amended from time to time) or by guidance regarding, interpretations of or exemptive orders under the 1940 Act. Under the Fund’s securities lending program, all securities loans will be secured continuously by cash collateral and/or non-cash collateral. Non-cash collateral will include only securities issued or guaranteed by the U.S. Government or one of its agencies or instrumentalities. The loans will be made only to borrowers deemed by the Adviser to be creditworthy, and when, in the judgment of the Adviser, the consideration that can be earned at that time from securities loans justifies the attendant risk. If a loan is collateralized by cash, the Fund will be compensated for the loan from a portion of the net return from the interest earned on the collateral after a rebate paid to the borrower (in some cases this rebate may be a “negative rebate” or fee paid by the borrower to the Fund in connection with the loan). If a Fund receives non-cash collateral, the Fund will receive a fee from the borrower generally equal to a negotiated percentage of the market value of the loaned securities. For its services, the securities lending agent receives a fee from the Fund.

A Fund will have the right to call a loan and obtain the securities loaned at any time on notice to the borrower within the normal and customary settlement time for the securities. While the securities are on loan, the borrower is obligated to pay the Fund amounts equal to any income or other distributions from the securities. The Fund will not have the right to vote any securities during the existence of a loan, but will have the right to recall loaned securities in order to exercise voting or other ownership rights. When the Fund lends securities, its investment performance will continue to reflect changes in the value of the securities loaned.

A Fund will invest any cash collateral in shares of a money market fund approved by the Fund’s Board of Directors or Trustees (the “Board”) and expected to be managed by the Adviser. Any such investment will be at the Fund’s risk. The Fund may pay reasonable finders’, administrative, and custodial fees in connection with a loan.

Principal risks of lending portfolio securities include that the borrower will fail to return the loaned securities upon termination of the loan and that the value of the collateral will not be sufficient to replace the loaned securities.

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Preferred Stock

A Fund may invest in preferred stock. Preferred stock is a class of capital stock that typically pays dividends at a specified rate. Preferred stock is generally senior to common stock, but is subordinated to any debt the issuer has outstanding. Accordingly, preferred stock dividends are not paid until all debt obligations are first met. Preferred stock may be subject to more fluctuations in market value, due to changes in market participants’ perceptions of the issuer’s ability to continue to pay dividends, than debt of the same issuer. These investments include convertible preferred stock, which includes an option for the holder to convert the preferred stock into the issuer’s common stock under certain conditions, among which may be the specification of a future date when the conversion must begin, a certain number of shares of common stock per share of preferred stock, or a certain price per share for the common stock. Convertible preferred stock tends to be more volatile than non-convertible preferred stock, because its value is related to the price of the issuer’s common stock as well as the dividends payable on the preferred stock.

Real Estate Investment Trusts (“REITs”)

REITs are pooled investment vehicles that invest primarily in income-producing real estate or real estate related loans or interests. REITs are generally classified as equity REITs, mortgage REITs or a combination of equity and mortgage REITs. Equity REITs invest the majority of their assets directly in real property and derive income primarily from the collection of rents. Equity REITs can also realize capital gains by selling properties that have appreciated in value. Mortgage REITs invest the majority of their assets in real estate mortgages and derive income from the collection of interest payments and principal. Similar to investment companies such as the Funds, REITs are not taxed on income distributed to shareholders provided they comply with several requirements of the U.S. Internal Revenue Code of 1986, as amended (the “Code”). A Fund will indirectly bear its proportionate share of expenses incurred by REITs in which the Fund invests in addition to the expenses incurred directly by the Fund.

Repurchase Agreements and Buy/Sell Back Transactions

A Fund may enter into repurchase agreements. In a repurchase agreement transaction the Fund buys a security and simultaneously agrees to sell it back to the counterparty at a specified price in the future. However, a repurchase agreement is economically similar to a secured loan, in that the Fund lends cash to a counterparty for a specific term, normally a day or a few days, and is given acceptable collateral (the purchased securities) to hold in case the counterparty does not repay the loan. The difference between the purchase price and the repurchase price of the securities reflects an agreed-upon “interest rate”. Given that the price at which a Fund will sell the collateral back is specified in advance, a Fund is not exposed to price movements on the collateral unless the counterparty defaults. If the counterparty defaults on its obligation to buy back the securities at the maturity date and the liquidation value of the collateral is less than the outstanding loan amount, a Fund would suffer a loss. In order to further mitigate any potential credit exposure to the counterparty, if the value of the securities falls below a specified level that is linked to the loan amount during the life of the agreement, the counterparty must provide additional collateral to support the loan.

A Fund may enter into buy/sell back transactions, which are similar to repurchase agreements. In this type of transaction, a Fund enters a trade to buy securities at one price and simultaneously enters a trade to sell the same securities at another price on a specified date. Similar to a repurchase agreement, the repurchase price is higher than the sale price and reflects current interest rates. Unlike a repurchase agreement, however, the buy/sell back transaction is considered two separate transactions.

Reverse Repurchase Agreements and Dollar Rolls

A Fund may enter into reverse repurchase agreements and dollar rolls, subject to the Fund’s limitations on borrowings. The terms of reverse repurchase agreements are essentially the reverse of “repurchase agreements” described above. In a reverse repurchase agreement transaction, the Fund sells a security and simultaneously agrees to repurchase it at a specified time and price. The economic effect of a reverse repurchase agreement is that of the Fund borrowing money on a secured basis, and reverse repurchase agreements may be considered a form of borrowing for some purposes. Even though the Fund posts securities as collateral, the Fund maintains exposure to price declines on these securities since it has agreed to repurchase the securities at a fixed price. Accordingly, reverse repurchase agreements create leverage risk for the Fund because the Fund maintains exposure to price declines of both the securities it sells in the reverse repurchase agreement and any securities it purchases with the cash it receives under the reverse repurchase agreement. If the value of the posted collateral declines, the counterparty would require the Fund to post additional collateral. If the value of the collateral increases, the Fund may ask for some of its collateral back. If the counterparty defaults and fails to sell the securities back to the Fund at a time when the market purchase price of the securities exceeds the agreed-upon repurchase price, the Fund would suffer a loss.

Dollar rolls involve sales by a Fund of securities for delivery in the current month and the Fund’s simultaneously contracting to repurchase substantially similar (same type and coupon) securities on a specified future date. During the roll period, a Fund forgoes principal and interest paid on the securities. A Fund is compensated by the difference between the current sales price and the lower forward price for the future purchase (often referred to as the “drop”) as well as by the interest earned on the cash proceeds of the initial sale.

Reverse repurchase agreements and dollar rolls involve the risk that the market value of the securities a Fund is obligated to repurchase under the agreement may decline below the repurchase price. In the event the buyer of securities under a reverse repurchase agreement or dollar roll files for bankruptcy or becomes insolvent, a Fund’s use of the proceeds of the agreement may be restricted pending a determination by the other party, or its trustee or receiver, whether to enforce the Fund’s obligation to repurchase the securities.

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Rights and Warrants

Rights and warrants are option securities permitting their holders to subscribe for other securities. Rights are similar to warrants except that they have a substantially shorter duration. Rights and warrants do not carry with them dividend or voting rights with respect to the underlying securities, or any rights in the assets of the issuer. As a result, an investment in rights and warrants may be considered more speculative than certain other types of investments. In addition, the value of a right or a warrant does not necessarily change with the value of the underlying securities, and a right or a warrant ceases to have value if it is not exercised prior to its expiration date.

Short Sales

A Fund may make short sales as a part of overall portfolio management or to offset a potential decline in the value of a security. A short sale involves the sale of a security that a Fund does not own, or if the Fund owns the security, is not to be delivered upon consummation of the sale. When the Fund makes a short sale of a security that it does not own, it must borrow from a broker-dealer the security sold short and deliver the security to the broker-dealer upon conclusion of the short sale.

If the price of the security sold short increases between the time of the short sale and the time a Fund replaces the borrowed security, the Fund will incur a loss; conversely, if the price declines, the Fund will realize a short-term capital gain. The potential for the price of a fixed-income security sold short to rise is a function of the combination of the remaining maturity of the obligation, its creditworthiness and its yield. Unlike short sales of equities or other instruments, potential for the price of a fixed-income security to rise may be limited due to the fact that the security will be no more than par at maturity. However, the short sale of other instruments or securities generally, including fixed-income securities convertible into equities or other instruments, a fixed-income security trading at a deep discount from par or that pays a coupon that is high in relative and/or absolute terms, or that is denominated in a currency other than the U.S. Dollar, involves the possibility of a theoretically unlimited loss since there is a theoretically unlimited potential for the market price of the security sold short to increase.

Standby Commitment Agreements

Standby commitment agreements are similar to put options that commit a Fund, for a stated period of time, to purchase a stated amount of a security that may be issued and sold to the Fund at the option of the issuer. The price and coupon of the security are fixed at the time of the commitment. At the time of entering into the agreement, the Fund is paid a commitment fee, regardless of whether the security ultimately is issued. A Fund will enter into such agreements only for the purpose of investing in the security underlying the commitment at a yield and price considered advantageous to the Fund and unavailable on a firm commitment basis.

There is no guarantee that a security subject to a standby commitment will be issued. In addition, the value of the security, if issued, on the delivery date may be more or less than its purchase price. Since the issuance of the security is at the option of the issuer, a Fund will bear the risk of capital loss in the event the value of the security declines and may not benefit from an appreciation in the value of the security during the commitment period if the issuer decides not to issue and sell the security to the Fund.

Structured Products

A Fund may invest in certain hybrid derivatives-type instruments that combine features of a traditional stock or bond with those of, for example, a futures contract or an option. These instruments include structured notes and indexed securities, commodity-linked notes and commodity index-linked notes and credit-linked securities. The performance of the structured product, which is generally a fixed-income security, is tied (positively or negatively) to the price or prices of an unrelated reference indicator such as a security or basket of securities, currencies, commodities, a securities or commodities index or a credit default swap or other kinds of swaps. The structured product may not pay interest or protect the principal invested. The structured product or its interest rate may be a multiple of the reference indicator and, as a result, may be leveraged and move (up or down) more rapidly than the reference indicator. Investments in structured products may provide a more efficient and less expensive means of obtaining exposure to underlying securities, commodities or other derivatives, but may potentially be more volatile and carry greater trading and market risk than investments in traditional securities. The purchase of a structured product also exposes a Fund to the credit risk of the issuer of the structured product.

Structured notes are derivative debt instruments. The interest rate or principal of these notes is determined by reference to an unrelated indicator (for example, a currency, security, or index thereof) unlike a typical note where the borrower agrees to make fixed or floating interest payments and to pay a fixed sum at maturity. Indexed securities may include structured notes as well as securities other than debt securities, the interest or principal of which is determined by an unrelated indicator.

Commodity-linked notes and commodity index-linked notes provide exposure to the commodities markets. These are derivative securities with one or more commodity-linked components that have payment features similar to commodity futures contracts, commodity options, commodity indices or similar instruments. Commodity-linked products may be either equity or debt securities, leveraged or unleveraged, and have both security- and commodity-like characteristics. A portion of the value of these instruments may be derived from the value of a commodity, futures contract, index or other economic variable.

A Fund may also invest in certain hybrid derivatives-type investments that combine features of a traditional bond with those of certain derivatives such as a credit default swap, an interest rate swap or other securities. These investments include credit-linked securities. The issuers of these securities frequently are limited purpose trusts or other special purpose vehicles that invest in a derivative instrument or basket of derivative instruments in order to provide exposure to certain fixed-income markets. For instance, a Fund may invest in

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credit-linked securities as a cash management tool to gain exposure to a certain market or to remain fully invested when more traditional income-producing securities are not available. The performance of the structured product, which is generally a fixed-income security, is linked to the receipt of payments from the counterparties to the derivative instruments or other securities. A Fund’s investments in credit-linked securities are indirectly subject to the risks associated with derivative instruments, including among others, credit risk, default risk, counterparty risk, interest rate risk and leverage risk. These securities are generally structured as Rule 144A Securities so that they may be freely traded among qualified institutional buyers. However, changes in the market for credit-linked securities or the availability of willing buyers may result in reduced liquidity for the securities.

Depositary Receipts and Securities of Supranational Entities

A Fund may invest in depositary receipts. American Depositary Receipts, or ADRs, are depositary receipts typically issued by a U.S. bank or trust company that evidence ownership of underlying securities issued by a foreign corporation. Global Depositary Receipts, or GDRs, European Depositary Receipts, or EDRs, and other types of depositary receipts are typically issued by non-U.S. banks or trust companies and evidence ownership of underlying securities issued by either a U.S. or a non-U.S. company. Depositary receipts may not necessarily be denominated in the same currency as the underlying securities into which they may be converted. In addition, the issuers of the stock underlying unsponsored depositary receipts are not obligated to disclose material information in the United States. Generally, depositary receipts in registered form are designed for use in the U.S. securities markets, and depositary receipts in bearer form are designed for use in securities markets outside of the United States. For purposes of determining the country of issuance, investments in depositary receipts of either type are deemed to be investments in the underlying securities.

Chinese Depositary Receipts, or CDRs, are depositary receipts traded on Chinese exchanges that evidence ownership of underlying securities of Chinese companies traded in Hong Kong or outside of China. Depending on the relative prices of a CDR and its underlying security and the Adviser’s assessment of price movements in the respective markets, the Adviser may at times choose to invest AB Disruptors ETF’s assets in a CDR rather than its underlying security. It is not known whether an active market for CDRs will develop, or how the value and trading activity for particular CDRs will relate to those of the underlying securities.

A supranational entity is an entity designated or supported by the national government of one or more countries to promote economic reconstruction or development. Examples of supranational entities include the World Bank (International Bank for Reconstruction and Development) and the European Investment Bank. “Semi-governmental securities” are securities issued by entities owned by either a national, state or equivalent government or are obligations of one of such government jurisdictions that are not backed by its full faith and credit and general taxing powers.

SPECIAL RISKS OF EXCHANGE-TRADED SHARES

Fluctuation of Net Asset Value and Share Price

The NAV of each Fund’s shares will generally fluctuate with changes in the market value of each Fund’s holdings. Each Fund’s shares are listed on the NYSE Arca, Inc. (the “Exchange”) and can be bought and sold in the secondary market at market prices. Although a share’s market price is expected to approximate its NAV, it is possible that the market price and NAV will vary significantly. As a result, you may sustain losses if you pay more than the shares’ NAV when you purchase shares, or receive less than the shares’ NAV when you sell shares, in the secondary market. During periods of disruptions to creations and redemptions, the existence of extreme market volatility, or lack of an active trading market for a Fund’s shares, the market price of Fund shares is more likely to differ significantly from the Fund’s NAV. During such periods, you may incur significant losses if you sell your shares. 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. Disruptions at market makers, Authorized Participants or market participants may also result in significant differences between the market price of a Fund’s shares and the Fund’s NAV. In addition, in stressed market conditions, the market for shares may become less liquid in response to deteriorating liquidity in the markets for the Fund’s underlying portfolio holdings.

The market price of shares during the trading day, like the price of any exchange-traded security, includes a “bid/ask” spread, which can be greater (wider) when there is little trading volume in Fund shares on the Exchange and lower (narrower) when there is a lot of trading volume in Fund shares. In times of severe market disruption, the bid/ask spread can increase significantly.

Non-U.S. Markets and Foreign Securities

Securities held by a Fund may be traded in non-U.S. markets that close at a different time than the Exchange. During the time when the Exchange is open but after the applicable local market closing, fixing or settlement times, bid-ask spreads and the resulting premium or discount to the Fund’s NAV may widen. The Adviser expects that, under normal market conditions, large discounts or premiums to NAV will not be sustained in the long term because of arbitrage opportunities. During the time when the Exchange is open but after the applicable local market has closed, the price of a foreign security that is included in a Fund’s portfolio (and a Fund’s NAV) will be the closing price on that security’s local market, updated for currency changes, until that local market opens again. As a result, the Fund’s NAV may be calculated using “stale” prices of foreign securities. This may contribute to a Fund’s NAV varying more widely from its market price.

Information about the premiums and discounts at which each Fund’s shares have traded is available at www.abfunds.com.

Trading Issues

Although each Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for a Fund’s

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shares will be maintained or that requirements to remain listed will be met. Only an Authorized Participant may engage in creation or redemption transactions directly with a Fund. A Fund has a limited number of intermediaries that act as Authorized Participants. There are no obligations of market makers to make a market in a Fund’s shares or of Authorized Participants to submit purchase or redemption orders for Creation Units. 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 securities and the market price of Fund shares. To the extent no other Authorized Participants step forward to create or redeem Creation Units, Fund shares may trade at a discount to NAV and possibly face delisting. This risk could be heightened if a Fund is investing in non-U.S. securities. In addition, trading of Fund shares in the secondary market may be halted, for example, due to activation of individual or market-wide “circuit breakers” affecting a Fund or its portfolio securities. If trading halts or an unanticipated early closing of the Exchange occurs, a shareholder may be unable to purchase or sell shares of a Fund. Foreside Fund Services, LLC (“Foreside” or the “Distributor”), the distributor of each Fund’s shares, does not maintain a secondary market in the shares.

If a Fund’s shares are delisted from the Exchange, the Adviser may seek to list the Fund shares on another market, merge the Fund with another ETF or traditional mutual fund, or redeem the Fund shares at NAV.

Shares of a Fund, similar to shares of other issuers listed on a stock exchange, may be sold short and are therefore subject to the risk of increased volatility and price decreases associated with being sold short.

ADDITIONAL RISKS AND OTHER CONSIDERATIONS

Investments in the Funds involve the risk considerations described below.

Borrowings and Leverage

A Fund may use borrowings for investment purposes subject to its investment policies and procedures and to applicable statutory or regulatory requirements. Borrowings by a Fund result in leveraging of the Fund’s shares. Each of the Funds may also use leverage for investment purposes by entering into transactions such as reverse repurchase agreements, forward contracts, and dollar rolls or certain derivatives. This means that a Fund uses cash made available during the term of these transactions to make investments in other securities.

Utilization of leverage, which is usually considered speculative, involves certain risks to a Fund’s shareholders. These include a higher volatility of the NAV of the Fund’s shares of common stock and the relatively greater effect of changes in the value of the Fund’s portfolio on the NAV of the shares caused by favorable or adverse changes in market conditions or interest rates. In the case of borrowings for investment purposes, so long as the Fund is able to realize a net return on the leveraged portion of its investment portfolio that is higher than the interest expense paid on borrowings, the effect of leverage will be to cause the Fund’s shareholders to realize a higher net return than if the Fund were not leveraged. If the interest expense on borrowings or other costs of leverage approach the net return on the Fund’s investment portfolio or investments made through leverage, as applicable, the benefit of leverage to the Fund’s shareholders will be reduced. If the interest expense on borrowings or other costs of leverage were to exceed the net return to the Fund, the Fund’s use of leverage could result in a lower rate of net return than if the Fund were not leveraged. Similarly, the effect of leverage in a declining market could normally be a greater decrease in NAV than if the Fund were not leveraged.

The SEC has adopted Rule 18f-4 under the 1940 Act, which imposes limits on the amount of derivatives and certain other forms of leverage into which a fund can enter. Rule 18f-4, among other things, permits a fund to treat certain financing transactions either as borrowings (subject to asset coverage requirements under the 1940 Act) or as “derivatives transactions” subject to certain risk-based limits of Rule 18f-4.

Foreign (Non-U.S.) Securities

Investing in securities of foreign issuers involves special risks and considerations not typically associated with investing in U.S. securities. The securities markets of many foreign countries are relatively small, with the majority of market capitalization and trading volume concentrated in a limited number of companies representing a small number of industries. A Fund that invests in securities of foreign issuers may experience greater price volatility and significantly lower liquidity than a portfolio invested solely in securities of U.S. companies. These markets may be subject to greater influence by adverse events generally affecting the market, and by large investors trading significant blocks of securities, than is usual in the United States. Sanctions imposed by the U.S. or a foreign country may restrict a Fund’s ability to purchase or sell foreign securities or may require a Fund to divest its holdings in foreign securities, which could adversely affect the value or liquidity of such holdings. The imposition of sanctions could also adversely affect global sectors and economies and thereby negatively affect the value of a Fund’s investments beyond any direct exposure to the countries or regions subject to the sanctions.

In addition, the securities markets of some foreign countries may be closed when the Funds are open for business, including during routine trading days and on certain days (e.g., local holidays). When a Fund holds securities traded in foreign markets, the market price for the Fund’s shares may be based on the last quoted price of securities traded on a foreign exchange, which may cause a deviation between the market price of the Fund’s share and the NAV per share, which could cause the Fund’s shares to trade at a premium or discount. In addition, when a foreign exchange is closed for trading, such as for local holidays , a Fund will be unable to add to or exit its positions in certain foreign securities even though it may otherwise be attractive to do so.

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Securities registration, custody, and settlement may in some instances be subject to delays and legal and administrative uncertainties. Foreign investment in the securities markets of certain foreign countries is restricted or controlled to varying degrees. These restrictions or controls may at times limit or preclude investment in certain securities and may increase the costs and expenses of a Fund. In addition, the repatriation of investment income, capital or the proceeds of sales of securities from certain countries is controlled under regulations, including in some cases the need for certain advance government notification or authority, and if a deterioration occurs in a country’s balance of payments, the country could impose temporary restrictions on foreign capital remittances. Income from certain investments held by a Fund could be reduced by foreign income taxes, including withholding taxes.

A Fund also 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 investment. Investing in local markets may require a Fund to adopt special procedures or seek local governmental approvals or other actions, any of which may involve additional costs to a Fund. These factors may affect the liquidity of a Fund’s investments in any country and the Adviser will monitor the effect of any such factor or factors on a Fund’s investments. Transaction costs, including brokerage commissions for transactions both on and off the securities exchanges, in many foreign countries are generally higher than in the United States.

Issuers of securities in foreign jurisdictions are generally not subject to the same degree of regulation as are U.S. issuers with respect to such matters as insider trading rules, restrictions on market manipulation, shareholder proxy requirements, and timely disclosure of information. The reporting, accounting, and auditing standards of foreign countries may differ, in some cases significantly, from U.S. standards in important respects, and less information may be available to investors in securities of foreign issuers than to investors in U.S. securities. Substantially less information is publicly available about certain non-U.S. issuers than is available about most U.S. issuers.

The economies of individual foreign countries may differ favorably or unfavorably from the U.S. economy in such respects as growth of gross domestic product or gross national product, rate of inflation, capital reinvestment, resource self-sufficiency, and balance of payments position. Nationalization, expropriation or confiscatory taxation, currency blockage, political changes, government regulation, political or social instability, public health crises (including the occurrence of a contagious disease or illness), revolutions, wars or diplomatic developments could affect adversely the economy of a foreign country. In the event of nationalization, expropriation, or other confiscation, a Fund could lose its entire investment in securities in the country involved. In addition, laws in foreign countries governing business organizations, bankruptcy and insolvency may provide less protection to security holders such as the Funds than that provided by U.S. laws.

The United Kingdom (“U.K.”) formally withdrew from the European Union (“EU”) on January 31, 2020. The U.K. and the EU negotiated an agreement governing their future trading and security relationships. This agreement became effective on a provisional basis on January 1, 2021 and entered into full force on May 1, 2021. The U.K. and the EU also negotiated a Memorandum of Understanding (“MoU”), which creates a framework for voluntary regulatory cooperation in financial services between the U.K. and the EU. The impact on the U.K. and European economies and the broader global economy of the uncertainties associated with implementing the agreement and MoU are significant and could have an adverse effect on the value of a Fund’s investments and its NAV. These uncertainties include an increase in the regulatory and customs requirements imposed on cross-border trade between the U.K. and the EU, the negotiation and implementation of additional arrangements between the U.K. and the EU affecting important parts of the economy (such as financial services), volatility and illiquidity in markets, currency fluctuations, the renegotiation of other existing trading and cross-border cooperation arrangements (whether economic, tax, fiscal, legal, regulatory or otherwise) of the U.K. and the EU, and potentially lower growth for companies in the U.K., Europe and globally.

In addition, Russia launched a large-scale invasion of Ukraine on February 24, 2022. The extent and duration of the military action, as well as sanctions imposed following the invasion, have resulted in, and may continue to result in, significant market disruptions in the region and beyond. Future market disruptions are impossible to predict, but they could continue to be significant and adversely affect economies in the region and beyond, and to have a significant effect on the value of certain securities, as well as the markets for certain commodities, such as oil and natural gas, as well as other sectors.

Investments in securities of companies in emerging markets involve special risks. There are approximately 100 countries identified by the World Bank as Low Income, Lower Middle Income and Upper Middle Income countries that are generally regarded as emerging markets. Emerging market countries that the Adviser currently considers for investment include:

Countries may be added to or removed from this list at any time.

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Investing in emerging market securities involves risks different from, and greater than, risks of investing in domestic securities or in the securities of issuers domiciled in developed, foreign countries. These risks include: smaller market capitalization of securities markets, which may suffer periods of relative illiquidity; significant price volatility; restrictions on foreign investment; and possible repatriation of investment income and capital. In addition, foreign investors may be required to register the proceeds of sales and future economic or political crises could lead to price controls, forced mergers, expropriation or confiscatory taxation, seizure, nationalization, or creation of government monopolies. The currencies of emerging market countries may experience significant declines against the U.S. Dollar, and devaluation may occur subsequent to investments in these currencies by a Fund. Inflation and rapid fluctuations in inflation rates have had, and may continue to have, negative effects on the economies and securities markets of certain emerging market countries.

Additional risks of emerging market securities may include: greater social, economic and political uncertainty and instability; more substantial governmental involvement in the economy; less governmental supervision and regulation; unavailability of currency hedging techniques; companies that are newly organized and small; less developed legal systems with fewer security holder rights and practical remedies to pursue claims, including class actions or fraud claims; the limited ability of U.S. authorities to bring and enforce actions against non-U.S. companies and non-U.S. persons; and differences in the nature and quality of financial information, including (i) auditing and financial reporting standards, which may result in unavailability or unreliability of material information about issuers and (ii) the risk that the Public Company Accounting Oversight Board (“PCAOB”) may not be able to inspect audit practices and work conducted by PCAOB-registered audit firms in certain emerging market countries, such as China. Thus there can be no assurance that the quality of financial reporting or the audits conducted by such audit firms of U.S.-listed emerging market companies meet PCAOB standards. Furthermore, in December 2021, the SEC finalized rules to implement the Holding Foreign Companies Accountable Act, which prohibits the trading of securities of foreign issuers (including those based in China) on a national securities exchange or through any other method regulated by the SEC (including through over-the-counter trading) if the PCAOB is unable to inspect the work papers of the auditors of such companies for three years. To the extent a Fund invests in the securities of a company whose securities are subject to such a trading prohibition, the Fund’s ability to transact in such securities, and the liquidity of the securities, as well as their market price, would likely be adversely affected. A Fund would also have to seek other markets in which to transact in such securities, which could increase the Fund’s costs. In addition, emerging securities markets may have different clearance and settlement procedures, which may be unable to keep pace with the volume of securities transactions or otherwise make it difficult to engage in such transactions. Settlement problems may cause a Fund to miss attractive investment opportunities, hold a portion of its assets in cash pending investment, or be delayed in disposing of a portfolio security. Such a delay could result in possible liability to a purchaser of the security.

A Fund may invest in securities of frontier market countries. Frontier market countries generally have smaller, less diverse economies and even less developed capital markets and legal, regulatory, and political systems than traditional emerging markets. As a result, the risks of investing in emerging market countries are magnified in frontier market countries. Frontier market risks include the potential for extreme price volatility and illiquidity—economic or political instability may cause larger price changes in frontier market securities than in securities of issuers located in more developed markets. The risks of investing in frontier market countries may also be magnified by: government ownership or control of parts of the private sector and of certain companies; trade barriers, exchange controls, managed adjustments in relative currency values, impaired or limited access to issuer information and other protectionist measures imposed or negotiated by the countries with which frontier market countries trade; and the relatively new and unsettled securities laws in many frontier market countries. The actions of a relatively few major investors in these markets are more likely to result in significant changes in local stock prices and the value of fund shares. The risk also exists that an emergency situation may arise in one or more frontier market countries as a result of which trading of securities may cease or may be substantially curtailed and prices for investments in such markets may not be readily available. All of these factors can make investing in frontier markets riskier than investing in more developed emerging markets or other foreign markets.

Investments in China. Risks of investments in securities of companies economically tied to China may include the volatility of the Chinese securities markets; heavy dependence on exports, which may decrease, sometimes significantly, when the world economy weakens; the continuing importance of the role of the Chinese Government, which may take legal or regulatory actions that affect the contractual arrangements of a company or economic and market practices and cause the value of the securities of an issuer held by a Fund to decrease significantly; and political unrest. While the Chinese economy has grown at a rapid rate in recent years, the rate of growth has generally been declining, and there can be no assurance that China’s economy will continue to grow in the future. In addition, trade disputes between China and its trading counterparties, including the United States, have arisen and may continue to arise. Such disputes have resulted in trade tariffs and may potentially result in future trade tariffs, as well as embargoes, trade limitations, trade wars and other negative consequences. These consequences could trigger, among other things, a substantial reduction in international trade and adverse effects on, and potential failure of, individual companies and/or large segments of China’s export industry, which could have potentially significant negative effects on the Chinese economy as well as the global economy. U.S. or other sanctions imposed on the Chinese Government or certain Chinese companies may adversely impact the Chinese economy and Chinese

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issuers in which the Fund invests, and may prohibit or limit the Fund’s ability to invest in securities of certain Chinese issuers or require the Fund’s sale of such securities, potentially on an accelerated schedule or at disadvantageous prices. Risks of investments in companies based in Hong Kong, a special administrative region of China, include heavy reliance on the U.S. economy and regional economies, particularly the Chinese economy, which makes these investments vulnerable to changes in these economies. These and related factors may result in adverse effects on investments in China and Hong Kong and have a negative impact on a Fund’s performance. In addition, China’s recent aggression towards Taiwan may impact companies economically tied to Taiwan, including supply chain channels.

China A shares are shares of companies incorporated in China and listed on the Shanghai Stock Exchange (“SSE”) or the Shenzhen Stock Exchange (“SZSE”). A Fund, including AB Disruptors ETF, may invest in China A shares of certain Chinese companies listed and traded through the Shanghai-Hong Kong Stock Connect and Shenzhen-Hong Kong Stock Connect programs (“Stock Connect”). Stock Connect is a securities trading and clearing program established by Hong Kong Exchanges and Clearing Limited, the SSE, the SZSE and China Securities Depository and Clearing Corporation Limited, which seeks to provide mutual stock market access between Mainland China and Hong Kong.

Trading through Stock Connect is subject to a number of restrictions and risks that could impair a Fund’s ability to invest in or sell China A shares and affect investment returns, including quotas that limit aggregate daily net purchases on an exchange on a particular day; the possible imposition of trading suspensions; differences in trading days between China and Stock Connect; Chinese securities regulations and stock exchange listing rules; uncertainties in China’s tax rules related to the taxation of income and gains from investments in China A shares; and clearance and settlement procedures associated with Stock Connect.

A Fund, including AB Disruptors ETF, may invest in Chinese companies through a special structure known as a variable interest entity (“VIE”), which is designed to provide foreign investors, such as the Fund, with exposure to Chinese companies that operate in certain sectors in which China restricts or prohibits foreign investments. In this structure, the Chinese-based operating company is the VIE and establishes a shell company in a foreign jurisdiction, such as the Cayman Islands. The shell company lists on a foreign exchange (such as the Exchange or NASDAQ) and enters into contractual arrangements with the VIE through one or more wholly-owned special purpose vehicles. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the shell company has no equity ownership of the VIE, these contractual arrangements permit the shell company to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed shell company, such as a Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership interest in the Chinese-based operating company. The contractual arrangements between the shell company and the VIE may not be as effective in providing operational control as direct equity ownership, and a foreign investor’s rights may be limited, including by actions of the Chinese government which could determine that the underlying contractual arrangements are invalid. While VIEs are a longstanding industry practice and are well known by Chinese officials and regulators, the structure has not been formally recognized under Chinese law and it is uncertain whether Chinese officials or regulators will withdraw their implicit acceptance of the structure.

It is also uncertain whether the contractual arrangements, which may be subject to conflicts of interest between the legal owners of the VIE and foreign investors, would be enforced by Chinese courts or arbitration bodies. Non-recognition of these structures by the Chinese government, or the inability to enforce such contracts, from which the shell company derives its value, would likely cause the VIE-structured holding(s) to suffer significant and possibly permanent loss, and in turn, adversely affect a Fund’s returns and NAV.

Foreign (Non-U.S.) Currencies

Investing in and exposure to foreign currencies involve special risks and considerations. A Fund that invests some portion of its assets in securities denominated in, and receives revenues in, foreign currencies will be adversely affected by reductions in the value of those currencies relative to the U.S. Dollar. Foreign currency exchange rates may fluctuate significantly. They are determined by supply and demand in the foreign exchange markets, the relative merits of investments in different countries, actual or perceived changes in interest rates, and other complex factors. Currency exchange rates also can be affected unpredictably by intervention (or the failure to intervene) by U.S. or foreign governments or central banks or by currency controls or political developments. In light of these risks, a Fund may engage in certain currency hedging transactions, as described above, which involve certain special risks.

A Fund may also invest directly in foreign currencies for non-hedging purposes on a spot basis (i.e., cash) or through derivatives transactions, such as forward currency exchange contracts, futures contracts and options thereon, swaps and options as described above. These investments will be subject to the same risks. In addition, currency exchange rates may fluctuate significantly over short periods of time, causing a Fund’s NAV to fluctuate.

Investment in Smaller, Less-Seasoned Companies

Investment in smaller, less-seasoned companies involves greater risks than are customarily associated with securities of more established companies. Companies in the earlier stages of their development often have products and management personnel that have not been thoroughly tested by time or the marketplace; their financial resources may not be as substantial as those of more established companies. The securities of smaller, less-seasoned companies may have relatively limited marketability

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and may be subject to more abrupt or erratic market movements than securities of larger, more established companies or broad market indices. The revenue flow of such companies may be erratic and their results of operations may fluctuate widely and may also contribute to stock price volatility.

Management Risk – Quantitative Models

The Adviser may use investment techniques that incorporate, or rely upon, quantitative models. These models may not work as intended and may not enable a Fund to achieve its investment objective. In addition, certain models may be constructed using data from external providers, and these inputs may be incorrect or incomplete, thus potentially limiting the effectiveness of the models. Finally, the Adviser may change, enhance and update its models and its usage of existing models at its discretion.

Future Developments

A Fund may take advantage of other investment practices that are not currently contemplated for use by the Fund, or are not available but may yet be developed, to the extent such investment practices are consistent with the Fund’s investment objective and legally permissible for the Fund. Such investment practices, if they arise, may involve risks that exceed those involved in the activities described above.

Changes in Investment Objectives and Policies

The Board may change the Fund’s investment objective without shareholder approval. The Fund will provide shareholders with 60 days’ prior written notice of any change to the Fund’s investment objective. A Fund that has a policy to invest at least 80% of its net assets in securities indicated by its name will not change that policy without 60 days’ prior written notice to shareholders. Unless otherwise noted, all other investment policies of a Fund may be changed without shareholder approval.

Temporary Defensive Position

For temporary defensive purposes in an attempt to respond to adverse market, economic, political or other conditions, each Fund may invest in certain types of short-term, liquid, investment grade or high-quality (depending on the Fund) debt securities. While a Fund is investing for temporary defensive purposes, it may not meet its investment objective.

Portfolio Holdings

A description of the Funds’ policies and procedures with respect to the disclosure of the Funds’ portfolio securities is available in the Funds’ SAI.

On each business day, before commencement of trading on the Exchange, each Fund will disclose on www.abfunds.com the identities and quantities of the Fund’s portfolio holdings that will form the basis for the Fund’s calculation of NAV at the end of the business day. Other information concerning each Fund’s portfolio holdings may also be published on the Funds’ website from time to time.

Website Disclosures

The following information about each Fund is available on the Fund’s website, www.abfunds.com, which is publicly available and free of charge:

Cyber Security Risk

As the use of the Internet and other technologies has become more prevalent in the course of business, the Funds and their service providers, including the Adviser, have become more susceptible to operational and financial risks associated with cyber security. Cyber security incidents can result from deliberate attacks such as gaining unauthorized access to digital systems (e.g., through “hacking” or malicious software coding) for purposes of misappropriating assets or sensitive information, corrupting data, or causing operational disruption, or from unintentional events, such as the inadvertent release of confidential information. Cyber security failures or breaches of a Fund or its service providers or the issuers of securities in which a Fund invests have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, the inability of Fund shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, and/or additional compliance costs. While measures have been developed which are designed to reduce the risks associated with cyber security incidents, there can be no assurance that those measures will be effective, particularly since a Fund does not control the cyber security defenses or plans of its service providers, financial intermediaries and companies with which those entities do business and companies in which the Fund invests.

Cyber security incidents, both intentional and unintentional, may allow an unauthorized party to gain access to Fund or shareholder assets, Fund or customer data (including private shareholder information), or proprietary information, or cause

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a Fund, the Adviser, and/or a Fund’s service providers (including, but not limited to, fund accountants, custodians, sub-custodians, transfer agents and financial intermediaries) to suffer data breaches, data corruption or lose operational functionality, or prevent Fund shareholders from purchasing, redeeming, or exchanging shares or receiving distributions. The Funds and the Adviser have limited ability to prevent or mitigate cyber security incidents affecting third-party service providers. Cyber security incidents may result in financial losses to a Fund and its shareholders, and substantial costs may be incurred in seeking to prevent or minimize future cyber security incidents.

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INVESTING IN THE FUNDS

This section discusses how to buy, sell or redeem, or exchange shares of a Fund that are offered through this Prospectus.

How to Buy Shares

Shares of each Fund may be acquired or redeemed directly from the Fund only in Creation Units or multiples thereof. Only an Authorized Participant (as defined under “Creations and Redemptions”) may engage in creation or redemption transactions directly with the Fund. Once created, shares of the Fund generally trade in the secondary market in amounts less than a Creation Unit.

Shares of each Fund are listed and traded on the Exchange, and individual investors can purchase or sell shares in the secondary market through a financial intermediary. The Funds do not impose any minimum investment for shares of the Funds purchased on an exchange or otherwise in the secondary market. AB US Low Volatility Equity ETF shares trade under the ticker symbol “LOWV.” AB US High Dividend ETF shares trade under the ticker symbol “HIDV.” AB Disruptors ETF shares trade under the ticker symbol “FWD.”

When buying or selling shares of the Funds through a financial intermediary, you may incur a brokerage commission and other charges. The commission is frequently a fixed amount and may be a significant proportional cost for investors seeking to buy or sell small amounts of shares. In addition, you may incur the cost of the “spread,” that is, any difference between the bid price and the ask price. The spread varies over time for shares of the Funds based on each Fund’s trading volume and market liquidity, and is generally lower if the Fund has high trading volume and market liquidity, and higher if the Fund has little trading volume and market liquidity (which is often the case for funds that are newly launched or small in size). A Fund’s spread may also be impacted by the liquidity of the underlying securities held by the Fund, particularly for newly launched or smaller funds or in instances of significant volatility of the underlying securities.

Your ownership of Fund shares will be shown on the records of the financial intermediary through which you hold the shares. The Fund will not have any record of your ownership. Your account information will be maintained by your financial intermediary, which will provide you with account statements, confirmations of your purchases and sales of Fund shares, and tax information. Your financial intermediary also will be responsible for ensuring that you receive income and capital gains distributions, as well as shareholder reports and other communications from the Fund whose shares you own. You will receive other services (e.g., dividend reinvestment and average cost information) only if your financial intermediary offers these services.

Book Entry

Shares are held in book-entry form, which means that no share certificates are issued. The Depository Trust Company (“DTC”) or its nominee is the record owner of all outstanding shares of the Funds and is recognized as the owner of all shares for all purposes.

Investors owning shares are beneficial owners as shown on the records of DTC or its participants. DTC serves as the securities depository for all shares. Participants in DTC include securities brokers and dealers, banks, trust companies, clearing corporations and other institutions that directly or indirectly maintain a custodial relationship with DTC. As a beneficial owner of shares, you are not entitled to receive physical delivery of share certificates or to have shares registered in your name, and you are not considered a registered owner of shares. Therefore, to exercise any right as an owner of shares, you must rely upon the procedures of DTC and its participants. These procedures are the same as those that apply to any other stocks that you hold in book-entry or “street name” form.

Share Trading Price

The trading prices of a Fund’s shares in the secondary market generally differ from the Fund’s daily NAV and are affected by market forces such as the supply of and demand for ETF shares and underlying securities held by the Fund, economic conditions and other factors. The trading price of the Fund’s shares on the Exchange may differ from the Fund’s daily NAV. The Exchange disseminates the approximate value of shares of the Fund every fifteen seconds. This approximate value should not be viewed as a “real-time” update of the NAV per share of the Fund because the approximate value may not be calculated in the same manner as the NAV, which is computed only once a day. The approximate value is generally determined by using both current market quotations and/or price quotations obtained from broker-dealers and other market intermediaries that may trade in the portfolio securities held by the Fund. As the respective international local markets close, the approximate value will continue to be updated for foreign exchange rates for the remainder of the U.S. trading day at the prescribed 15-second interval, but certain holdings may not be updated otherwise if such holdings do not trade in the United States. The Fund is not involved in, or responsible for, the calculation or dissemination of the approximate value, and the Fund does not make any representation or warranty as to its accuracy.

Frequent Purchases and Redemptions of Fund Shares

The Funds’ Board has not adopted a policy of monitoring for frequent purchases and redemptions of Fund shares (“frequent trading”) that appear to attempt to take advantage of potential arbitrage opportunities presented by a lag between a change in the value of a Fund’s portfolio securities after the close of the primary markets for the Fund’s portfolio securities and the reflection of that change in the Fund’s NAV (“market timing”). The Board believes this is appropriate because an ETF, such as each Fund, is intended to be attractive to arbitrageurs, as trading activity is critical to ensuring that the market price of Fund shares remains at or close to NAV. Since each Fund issues and redeems Creation Units at NAV plus applicable transaction

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fees, and each Fund’s shares may be purchased and sold on the Exchange at prevailing market prices, the risks of frequent trading are limited.

Although the Funds do not impose any restrictions on the frequency of purchases and redemptions, the Funds reserve the right to reject or limit purchases at any time as described in the SAI.

Premium and Discount Information

Most investors will buy and sell shares of the Funds in secondary market transactions through brokers at market prices, and a Fund’s shares will trade at market prices. The market price of shares may be greater than, equal to, or less than NAV. Market forces of supply and demand, economic conditions and other factors may affect the trading prices of shares of each Fund.

Information about each Fund’s daily market price and how often shares of each Fund traded on the Exchange are at a price above (i.e., at a premium) or below (i.e., at a discount) the NAV of each Fund (during a Fund’s four previous calendar quarters (or for the life of the Fund, if shorter)) can be found at www.abfunds.com.

Creations and Redemptions

Prior to trading in the secondary market, shares of each Fund are “created” at NAV by Authorized Participants for market makers, large investors and institutions only in block-size Creation Units (10,000 shares in the case of AB US Low Volatility Equity ETF, 20,000 shares in the case of AB US High Dividend ETF and 10,000 shares in the case of AB Disruptors ETF) or multiples thereof. Each “creator” or Authorized Participant has entered into an agreement with the Distributor.

A creation transaction, which is subject to acceptance by the Distributor and the Fund, generally takes place when an Authorized Participant deposits into the Fund a designated portfolio of securities (including any portion of such securities for which cash may be substituted) and a specified amount of cash approximating the holdings of the Fund in exchange for a specified number of Creation Units. To the extent practicable, the composition of such portfolio generally corresponds pro rata to the holdings of the Fund. However, Creation Units will generally correspond to the price and yield performance of the Fund. The Fund may, in certain circumstances, offer Creation Units partially or solely for cash.

Similarly, shares can be redeemed only in Creation Units, generally for a designated portfolio of securities (including any portion of such securities for which cash may be substituted) held by the Fund and a specified amount of cash. Except when aggregated in Creation Units, shares are not redeemable by the Fund.

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 under the authorized participant agreement.

Only an Authorized Participant may create or redeem Creation Units with the Fund. Authorized Participants may create or redeem Creation Units for their own accounts or for customers, including, without limitation, affiliates of the Fund.

In the event of a system failure or other interruption, including disruptions at market makers or Authorized Participants, orders to purchase or redeem Creation Units either may not be executed according to the Fund’s instructions or may not be executed at all, or the Fund may not be able to place or change orders.

To the extent the Fund engages in in-kind transactions, the Fund intends to comply with the U.S. federal securities laws in accepting securities for deposit and satisfying redemptions with portfolio securities by, among other means, assuring that any securities accepted for deposit and any securities used to satisfy redemption requests will be sold in transactions that would be exempt from registration under the Securities Act. Further, an Authorized Participant that is not a “qualified institutional buyer,” as such term is defined in Rule 144A under the Securities Act, will not be able to receive restricted securities eligible for resale under Rule 144A.

Creations and redemptions must be made through a firm that is either a member of the Continuous Net Settlement System of the National Securities Clearing Corporation or a DTC participant that has executed an agreement with the Distributor with respect to creations and redemptions of Creation Unit aggregations. Information about the procedures regarding creation and redemption of Creation Units (including the cut-off times for receipt of creation and redemption orders) is included in the Fund’s SAI.

Costs Associated with Creations and Redemptions

The Funds 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. The creation and redemption transaction fees applicable to the Funds have both fixed and variable components. The standard creation transaction fee, which is fixed, is charged to the Authorized Participant on the day such Authorized Participant creates a Creation Unit, and is the same regardless of the number of Creation Units purchased by the Authorized Participant on the applicable business day. Similarly, the standard redemption transaction fee, which is a fixed fee, is charged to the Authorized Participant on the day such Authorized Participant redeems a Creation Unit, and is the same regardless of the number of Creation Units redeemed by the Authorized Participant on the applicable business day. Creations and redemptions for cash are also subject to a variable additional fee (up to the maximum amount of 3% of the amount of a creation transaction and 2% of the amount of a redemption transaction). This fee is intended to compensate for brokerage, transaction, foreign exchange, execution, market impact and other costs and expenses related to cash transactions. From time to time, the transaction fees may be waived when believed to be in the best interests of the Funds.

The Distributor may refuse any order to purchase shares. Each Fund reserves the right to suspend the sale of its shares to the public in response to conditions in the securities markets or for other reasons.

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DISTRIBUTION PLAN

The Funds have adopted a Distribution Plan pursuant to Rule 12b-1 of the 1940 Act which permits the Funds to pay Rule 12b-1 fees not to exceed 0.25% per year of the Fund’s average daily net assets. No such fee is currently paid, and the Board has not approved the commencement of payments under the Rule 12b-1 Distribution Plan. The Funds do not plan to make payments under the Rule 12b-1 Plan within one year of each Fund’s effective date. The Funds will provide 60 days’ notice to shareholders before making payments under the Rule 12b-1 Plan. The Rule 12b-1 Distribution Plan covers materials that may be furnished, at the Adviser’s expense, to financial intermediaries and other service providers that relate to the Funds.

ADDITIONAL PAYMENTS TO BROKERS, DEALERS AND OTHER FINANCIAL INTERMEDIARIES

In addition to the commissions paid to or charged by financial intermediaries at the time of sale of Fund shares, the Adviser and its affiliates, at their own expense, provide additional payments to brokers, dealers or other financial intermediaries and service providers for distribution, marketing, promotional, educational and other services. These payments are often referred to as “revenue sharing” payments. In some circumstances, these payments may relate to information provided by brokers, dealers and financial intermediaries about investors in a Fund. In other circumstances, these payments may relate to intermediaries making Fund shares available to their customers, including through technology platforms, “preferred fund” programs, reduced commission programs or to defray or reduce all or a portion of “ticket” or other transactional charges imposed by the intermediary. These types of payments may be viewed as an incentive for a broker, dealer or financial intermediary or its representatives to recommend or offer shares of a Fund to its customers. You should ask your broker, dealer or financial intermediary for more details about any such payments it receives.

The Funds may use brokers and dealers that are also Authorized Participants to effectuate portfolio transactions. The Funds do not consider Authorized Participants’ activities as a factor when selecting brokers or dealers to effect portfolio transactions.

The Adviser or an affiliate may pay fees to an exchange as part of a program to provide compensation to market makers for liquidity and secondary market support services. These fees are provided to market makers that meet certain liquidity and other market quality standards with respect to a Fund. These fees are subject to approval by the SEC and are not paid by a Fund.

HOW THE FUNDS VALUE THEIR SHARES

Each Fund’s NAV is calculated on any day the New York Stock Exchange is open at the close of regular trading (ordinarily, 4:00 p.m., Eastern time, but sometimes earlier, as in the case of scheduled half-day trading or unscheduled suspensions of trading). To calculate NAV, a Fund’s assets are valued and totaled, liabilities are subtracted, and the balance, called net assets, is divided by the number of shares outstanding. If a Fund invests in securities that are primarily traded in non-U.S. markets which trade on weekends or other days when the Fund does not price its shares, the NAV of the Fund’s shares may change on days when shareholders will not be able to purchase or redeem their shares in the Fund.

The Funds value their securities at market value determined on the basis of market quotations or, if market quotations are not readily available or are unreliable, at “fair value” as determined in accordance with procedures approved by each Fund’s Board.

Foreign markets normally close earlier in the day than U.S. markets. The Funds generally determine the value of a security that is primarily traded on a non-U.S. exchange as of the close of trading on that exchange. The value of that security is then converted to its U.S. dollar equivalent at the foreign exchange rate in effect at 4:00 p.m., London time, on the day the value of the security is determined.

Pursuant to the valuation procedures, the Adviser, as each Fund’s valuation designee pursuant to Rule 2a-5 of the 1940 Act, is responsible for making all fair value determinations relating to a Fund’s portfolio investments, subject to the oversight of the Fund’s Board. When making a fair value determination, the Adviser may take into account any factors it deems appropriate. The Adviser may determine fair value based upon developments related to a specific security, current valuations of foreign stock indices (as reflected in U.S. futures markets) and/or U.S. sector or broader stock market indices. The prices of securities used by the Fund to calculate its NAV may differ from quoted or published prices for the same securities. Making a fair value determination involves subjective judgments, and it is possible that the fair value determined for a security is materially different than the value that could be realized upon the sale of that security.

The Funds expect to use fair value pricing for securities primarily traded on U.S. exchanges under certain circumstances, such as the early closing of the exchange on which a security is traded or suspension of trading in the security, or for securities for which market prices are not readily available or deemed unreliable (including restricted securities). Factors considered in fair value pricing may include, but are not limited to, information obtained by contacting the issuer or analysts, or by analysis of the issuers’ financial statements. The Funds may value their securities using fair value prices based on independent pricing services.

The Funds may use fair value pricing for securities primarily traded in non-U.S. markets because, among other things, most foreign markets close well before a Fund ordinarily values its securities at 4:00 p.m., Eastern time. The earlier close of these foreign markets gives rise to the possibility that significant events may have occurred in the interim. The Adviser monitors for significant events following the close of trading in foreign markets.

The Adviser has established a valuation committee of senior officers and employees (“Valuation Committee”) to fulfill the Adviser’s responsibilities as each Fund’s valuation designee, which operates under the policies and procedures approved by the Board, to value the Fund’s assets on behalf of the Fund. The Valuation Committee values Fund assets as described above. More information about the valuation of the Funds’ assets is available in the Funds’ SAI.

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MANAGEMENT OF THE FUNDS

INVESTMENT ADVISER

Each Fund’s investment adviser is AllianceBernstein L.P., 501 Commerce Street, Nashville, TN 37203. The Adviser, which is a controlled indirect subsidiary of Equitable Holdings, Inc., is a leading global investment adviser supervising client accounts with assets as of March 31, 2023 totaling approximately $676 billion (of which over $129 billion represented assets of registered investment companies sponsored by the Adviser). As of March 31, 2023, the Adviser managed retirement assets for many of the largest public and private employee benefit plans (including 16 of the nation’s FORTUNE 100 companies), for public employee retirement funds in 33 of the 50 states, for investment companies, and for foundations, endowments, banks and insurance companies worldwide. The 28 registered investment companies managed by the Adviser, comprising approximately 93 separate investment portfolios, had as of March 31, 2023 approximately 2.6 million shareholder accounts.

The Adviser provides investment advisory services and order placement facilities for each of the Funds. The Adviser is paid an annual unitary management fee by each Fund as set forth below and is responsible for the Fund’s expenses, including the cost of transfer agency, custody, fund administration, legal, audit and other services as well as acquired fund fees and expenses for affiliated money market funds, but excluding fee payments under the Fund’s investment advisory agreement, interest, taxes, acquired fund fees and expenses for unaffiliated funds, if any, brokerage commissions and other expenses connected with the execution of portfolio transactions, distribution and service fees payable pursuant to a Rule 12b-1 plan, if any, litigation, and extraordinary expenses.

A discussion regarding the basis for the Board’s approval of each Fund’s investment advisory agreement will be available in the Fund’s semi-annual report to shareholders for the fiscal period ending May 31, 2023.

The Adviser acts as an investment adviser to other persons, firms, or corporations, including investment companies, hedge funds, pension funds, and other institutional investors. The Adviser may receive management fees, including performance fees, that may be higher or lower than the advisory fees it receives from the Funds. Certain other clients of the Adviser have investment objectives and policies similar to those of a Fund. The Adviser may, from time to time, make recommendations that result in the purchase or sale of a particular security by its other clients simultaneously with a Fund. If transactions on behalf of more than one client during the same period increase the demand for securities being purchased or the supply of securities being sold, there may be an adverse effect on price or quantity. It is the policy of the Adviser to allocate advisory recommendations and the placing of orders in a manner that is deemed equitable by the Adviser to the accounts involved, including the Funds. When two or more of the clients of the Adviser (including a Fund) are purchasing or selling the same security on a given day from the same broker or dealer, such transactions are averaged as to price. The securities are then allocated to participating accounts using automated algorithms designed to achieve a fair, equitable and objective distribution of the securities over time.

PORTFOLIO MANAGERS

The management of, and investment decisions for, the Funds’ portfolios are made by certain Investment Policy Teams. Each Investment Policy Team relies heavily on the fundamental analysis and research of the Adviser’s large internal research staff. No one person is principally responsible for coordinating each Fund’s investments.

The following table lists the Investment Policy Teams, the person within each Investment Policy Team with the most significant responsibility for day-to-day management of each Fund’s portfolio, the length of time that each person has been jointly and primarily responsible for the Fund, and each person’s principal occupation during the past five years:

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The Funds’ SAI provides additional information about the portfolio managers’ compensation, other accounts managed by the portfolio managers, and the portfolio managers’ ownership of securities in the Funds.

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DIVIDENDS, DISTRIBUTIONS AND TAXES

DIVIDENDS AND DISTRIBUTIONS INFORMATION

Dividends from net investment income from AB US Low Volatility Equity ETF and AB US High Dividend ETF, if any, are declared and paid quarterly. Dividends from net investment income from AB Disruptors ETF, if any, are declared and paid annually. The Funds distribute their net realized capital gains, if any, to shareholders at least annually. During the fourth quarter of the calendar year, typically in early November, an estimate of each Fund’s capital gains distribution, if any, will be made available on the Fund’s website at www.alliancebernstein.com/investments/us/tax-center.htm. If you purchased your shares in the secondary market, your broker is responsible for distributing the income and capital gain distributions to you.

Distributions in cash may be reinvested automatically in additional whole shares only if the broker through whom you purchased shares makes such option available. Such shares will generally be reinvested by the broker based upon the market price of those shares and investors may be subject to customary brokerage commissions charged by the broker.

TAX INFORMATION

Any investment in a Fund typically involves several tax considerations. The information below is intended as a general summary for U.S. citizens and residents. Please see the SAI for additional information. Because each person’s tax situation is different, you are encouraged to consult your tax adviser about the tax implications of an investment in a Fund in your particular situation. You also can visit the Internal Revenue Service (IRS) website at www.irs.gov for more information about applicable tax rates and other information.

Taxation of Distributions

While it is the intention of each Fund to distribute to its shareholders substantially all of each fiscal year’s net income and net realized capital gains, if any, the amount and timing of any dividend or distribution will depend on the realization by the Fund of income and capital gains from investments. There is no fixed dividend rate and there can be no assurance that a Fund will pay any distributions or realize any capital gains. The final determination of the amount of a Fund’s return of capital distributions for the period will be made after the end of each calendar year.

The distributions you receive from a Fund are taxable, whether you take the distributions in cash or reinvest them in additional shares. The Fund’s distributions may be treated either as ordinary income or as long-term capital gain.

Distributions of net capital gains from the sale of investments that a Fund owned for more than one year and that are properly designated as capital gains distributions are taxable as long-term capital gains, taxable at a maximum rate of 20% for individuals, trusts and estates. A Fund may also make distributions that are treated as “qualified dividend income”, which is taxed at the same rates as long-term capital gains, to the extent such distributions are attributable to, and properly designated by a Fund as, “qualified dividend income”. “Qualified dividend income” generally is income derived from dividends from U.S. corporations and “qualified foreign corporations”. A Fund will notify you as to how much of the Fund’s distributions, if any, qualify for these reduced tax rates.

Other distributions by a Fund are generally taxable to you as ordinary income.

Dividends declared in October, November, or December and paid in January of the following year are taxable as if they had been paid the previous December.

Under certain circumstances, if a Fund realizes losses (e.g., from fluctuations in currency exchange rates) after paying a dividend, all or a portion of the dividend may subsequently be characterized as a return of capital. Returns of capital are generally nontaxable, but will reduce your tax basis in your Fund shares (which will increase the capital gain or reduce the capital loss that you subsequently realize on a sale of your shares). If that basis is reduced to zero (which could happen if you do not reinvest distributions and returns of capital are significant), any further returns of capital will be taxable to you as a capital gain.

Taxation of Sales of Shares

If you sell your Fund shares in the secondary market on an exchange, you may realize gain (or loss). The amount of your gain (or loss) will be the difference between the proceeds of the sale (the market price per share on the date of sale times the number Fund shares sold reduced by the expenses of the sale, if any) and your adjusted basis in those Fund shares sold. Any capital gain or loss is generally treated as long-term capital gain or loss if the shares have been held for more than one year and as short-term capital gain or loss if the shares have been held for one year or less. Long-term capital gains are taxable at a maximum rate of 20% for individuals, trusts and estates. Capital loss realized on the sale or exchange of shares held for six months or less will be treated as long-term capital loss to the extent of any capital gain dividends received by the shareholder. The ability to deduct capital losses may be limited.

Taxation of Creation Units

If an Authorized Participant exchanges securities for Creation Units, the Authorized Participant will generally recognize capital gain or capital loss from the exchange. The gain or loss will be equal to the difference between the market value of the Creation Units at the time of the exchange and the Authorized Participant’s aggregate tax basis in the securities surrendered plus any cash paid for the Creation Units. If the Authorized Participant exchanges Creation Units for securities, the Authorized Participant will generally recognize capital gain or capital loss equal to the difference between the Authorized Participant’s tax basis in the Creation Units and the aggregate market value of the securities and the amount of cash received.

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Net Investment Income Tax

Individuals, trusts, and estates whose income exceeds certain threshold amounts are subject to a 3.8% tax on “net investment income.” Net investment income takes into account distributions paid by the Fund and capital gains from any sale of shares.

Foreign Taxes and Foreign Tax Credit

Investment income received by a Fund from sources within foreign countries may be subject to foreign income taxes withheld at the source. To the extent that any Fund is liable for foreign income taxes withheld at the source, the Fund may be eligible to “pass through” to the Fund’s shareholders credits for foreign income taxes paid (or to permit shareholders to claim a deduction for such foreign taxes), but there can be no assurance that any Fund will be so eligible, and Funds that invest primarily in U.S. securities will not be so eligible. Furthermore, a shareholder’s ability to claim a foreign tax credit or deduction for foreign taxes paid by a Fund may be subject to certain limitations imposed by the Code, as a result of which a shareholder may not be permitted to claim a credit or deduction for all or a portion of the amount of such taxes.

General

If you buy shares before the Fund deducts a distribution from its NAV, you will pay the full price for the shares and then receive a portion of the price back as a distribution, which may be taxable.

Each year shortly after December 31, a Fund will send you tax information stating the amount and type of all its distributions for the year. You are encouraged to consult your tax adviser about the federal, state, and local tax consequences in your particular circumstances, as well as about any possible foreign tax consequences.

Dividend distributions and capital gains distributions that you receive, as well as your gains or losses from any sale of shares, may be subject to state and local income taxes.

Non-U.S. Shareholders

If you are a nonresident alien individual or a foreign corporation for federal income tax purposes, please see the Funds’ SAI for information on how you will be taxed as a result of holding shares in the Funds.

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GENERAL INFORMATION

Under unusual circumstances, a Fund may suspend redemptions or postpone payment for up to seven days or longer, as permitted by federal securities law.

Householding. Householding is an option available to certain investors. Householding is a method of delivery, based on the preference of the individual investor, in which a single copy of certain shareholder documents can be delivered to investors who share the same address, even if their accounts are registered under different names. Householding for the Funds is available through certain broker-dealers. Please contact your broker-dealer if you are interested in enrolling in householding and receiving a single copy of prospectuses and other shareholder documents, or if you are currently enrolled in householding and wish to change your householding status.

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GLOSSARY OF INVESTMENT TERMS

Equity securities include (i) common stocks, partnership interests, business trust shares and other equity or ownership interests in business enterprises and (ii) securities convertible into, and rights and warrants to subscribe for the purchase of, such stocks, shares and interests.

Fixed-income securities are investments, such as bonds, that pay a fixed rate of return.

S&P 500 High Dividend Index is a stock market index that serves as a benchmark for income seeking equity investors. The index is designed to measure the performance of 80 high yield companies within the S&P 500 and is equally weighted to best represent the performance of this group, regardless of constituent size.

S&P 500 Index is a stock market index containing the stocks of 500 U.S. large-capitalization corporations. Widely regarded as the best single gauge of the U.S. equities market, the S&P 500 Index includes a representative sample of 500 leading companies in leading industries of the U.S. economy.

U.S. Government securities are securities issued or guaranteed by the U.S. Government, its agencies or instrumentalities, including obligations that are issued by private issuers that are guaranteed as to principal or interest by the U.S. Government, its agencies or instrumentalities, or by certain government-sponsored entities (entities chartered by or sponsored by Act of Congress). These securities include securities backed by the full faith and credit of the United States, those supported by the right of the issuer to borrow from the U.S. Treasury, and those backed only by the credit of the issuing agency or entity itself. The first category includes U.S. Treasury securities (which are U.S. Treasury bills, notes, and bonds) and certificates issued by the Government National Mortgage Association. U.S. Government securities not backed by the full faith and credit of the United States or a right to borrow from the U.S. Treasury include certificates issued by the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation.

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FINANCIAL HIGHLIGHTS

Financial highlights information is not available because the Funds have not yet commenced operations as of the date of this Prospectus.

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For more information about the Funds, the following documents are available upon request:

The Funds’ annual and semi-annual reports to shareholders, once available, will contain additional information on the Funds’ investments. In the annual report, you will find a discussion of the market conditions and investment strategies that significantly affected a Fund’s performance during its last fiscal year.

The Funds have an SAI, which contains more detailed information about the Funds, including their operations and investment policies. The Funds’ SAI is incorporated by reference into (and is legally part of) this Prospectus.

You may request a free copy of the current annual/semi-annual report, once available, or the SAI, or make inquiries concerning the Funds, by contacting your broker or other financial intermediary, or by contacting the Adviser:

You may also view reports and other information about the Funds, including the SAI, by visiting the EDGAR database on the Securities and Exchange Commission’s website (http://www.sec.gov). Copies of this information can be obtained, for a duplicating fee, by electronic request at the following e-mail address: [email protected].

You also may find these documents and more information about the Adviser and the Funds on the Internet at: www.abfunds.com.

The [A/B] Logo is a service mark of AllianceBernstein and AllianceBernstein^® is a registered trademark used by permission of the owner, AllianceBernstein L.P.

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