Form 485APOS AMERICAN BEACON FUNDS

As filed with the Securities and Exchange Commission on December 30, 2025

1933 Act File No. 033-11387

1940 Act File No. 811-04984

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

AMERICAN BEACON FUNDS

(Exact Name of Registrant as Specified in Charter)

220 East Las Colinas Boulevard, Suite 1200

Irving, Texas 75039

(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, including Area Code: (817) 391-6100

Gregory J. Stumm, President

220 East Las Colinas Boulevard

Suite 1200

Irving, Texas 75039

(Name and Address of Agent for Service)

With copies to:

Kathy K. Ingber, Esq.

K&L Gates LLP

1601 K Street, NW

Washington, D.C. 20006-1600

It is proposed that this filing will become effective (check appropriate box)

If appropriate, check the following box:

The information in this Prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This Prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

PROSPECTUS

[XX XX, 2026]

This Prospectus contains important information you should know about investing, including information about risks. Please read it before you invest and keep it for future reference.

As with all mutual funds, the Securities and Exchange Commission has not approved or disapproved these securities or determined if this Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

Investment Objectives

The Fund’s investment objectives are long-term capital appreciation and current income.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis. More information about these and other discounts is available from your financial professional and in “Choosing Your Share Class” on page   17 of the Prospectus and “Additional Purchase and Sale Information for A Class Shares” on page   35  of the Statement of Additional Information (“SAI”). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund’s Prospectus entitled “Intermediary Sales Charge Discounts, Waivers and Other Information.”

Shareholder Fees (fees paid directly from your investment)

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes 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 Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. C Class shares automatically convert to A Class shares 8 years after purchase, if the conversion is available through your financial intermediary. This Example reflects your costs as though C Class shares were held for the full 10-year period. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Assuming no redemption of shares:

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 75 % of the average value of its portfolio.

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Principal Investment Strategies

Under normal circumstances, the Fund invests at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in equity securities of small market capitalization U.S. companies that the Fund considers to have value characteristics.

The Fund considers small market capitalization companies to be those with market capitalizations within the market capitalization range of the companies in the Russell 2000^® Index. As of December 31, 2025 , the Russell 2000 Index consisted of companies with market capitalizations of $ [XX] million to $ [XX]  billion. The Fund considers a company to be a U.S. company if:

The Fund considers a company to have value characteristics if it has one or more of the following characteristics (relative to the Russell 2000 Index):  

The Fund may also invest in mid-capitalization and micro-capitalization companies. The Fund’s investments principally include common stocks and real estate investment trusts (“REITs”). The Fund’s investments in stocks also include dividend-paying stocks.

The Manager allocates the assets of the Fund among different sub-advisors. The Manager believes that this strategy may help the Fund outperform other investment styles over the longer term while reducing volatility and downside risk. Except for Brandywine Global Investment Management, LLC (“Brandywine Global”), each of the sub-advisors determines the earnings growth prospects of companies based upon a combination of internal and external research using fundamental analysis and considering changing economic trends. The process is research driven and takes into consideration items such as a company’s tangible assets, sustainability of its cash flows, capital intensity and financial leverage.

Brandywine Global employs a primarily quantitative strategy that focuses on buying stocks deemed to be less expensive based on price to earnings ratio or price to book value ratio and that have positive price momentum.

For each sub-advisor, the decision to sell a stock is typically based on the belief that the company is no longer considered undervalued or shows deteriorating fundamentals, or that better investment opportunities exist in other stocks. The Fund may have significant exposure to the  Financials sector. However, as the sector composition of the Fund’s portfolio changes over time, the Fund’s exposure to the Financials sector may be lower at a future date, and the Fund’s exposure to other market sectors may be higher.

The Fund may invest cash balances in other investment companies, including a government money market fund advised by the Manager, with respect to which the Manager also receives a management fee. The Fund may purchase and sell equity index futures contracts to gain market exposure on cash balances or reduce market exposure in anticipation of liquidity needs.

The Fund may seek to earn additional income by lending its securities to certain qualified broker-dealers and institutions.

Principal Risks

There is no assurance that the Fund will achieve its investment objectives and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of current income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund listed below are presented in alphabetical order and not in order of importance or potential exposure. Among other matters, this presentation is intended to facilitate your ability to find particular risks and compare them with the risks of other funds. Each risk summarized below is considered a “principal risk” of investing in the Fund, regardless of the order in which it appears.

Cybersecurity and Operational Risk
Operational risks arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents may negatively impact the Fund, its service providers and third-party fund distribution platforms, including the ability of shareholders to transact in the Fund’s shares, and result in financial losses. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, shareholder data, or proprietary information, or cause the Fund or its service providers, as well as securities trading venues and their service providers, to suffer data corruption or lose operational functionality. Cybersecurity incidents can result from deliberate attacks or unintentional events. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. The Fund cannot control the cybersecurity and operational plans and systems of its service providers, its counterparties or the issuers of securities in which the Fund invests. The issuers of the Fund’s investments are likely to be dependent on computers for their operations and require ready access to their data and the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of the Fund’s investments, leading to significant loss of value.

Dividend Risk
An issuer of stock held by the Fund may choose not to declare a dividend or the dividend rate might not remain at current levels or increase over time. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks. Securities that pay dividends may be sensitive to changes in interest rates and, as interest rates rise or fall, the prices of such securities may fall.

Equity Investments Risk
Equity securities represent ownership interests in companies and are subject to investment risk, issuer risk and market risk. In general, the values of stocks and other equity securities fluctuate, and sometimes widely fluctuate, in response to changes in a company’s financial condition as well as general market, economic and political conditions and other factors. The Fund may experience a significant or complete loss on its investment in an equity security. In addition, stock prices may be particularly sensitive to rising interest rates, which increase borrowing costs and the costs of capital.  The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

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Futures Contracts Risk
Futures contracts are derivative instruments pursuant to a contract where the parties agree to a fixed price for an agreed amount of securities or other underlying assets at an agreed date. The use of such derivative instruments may expose the Fund to additional risks, such as credit risk, liquidity risk, and counterparty risk, that it would not be subject to if it invested directly in the securities underlying those derivatives. There can be no assurance that any strategy used will succeed. There may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes. There also can be no assurance that, at all times, a liquid market will exist for offsetting a futures contract that the Fund has previously bought or sold, and this may result in the inability to close a futures contract when desired. Futures contracts may experience potentially dramatic price changes, which will increase the volatility of the Fund and may involve a small investment of cash (the amount of initial and variation margin) relative to the magnitude of the risk assumed (the potential increase or decrease in the price of the futures contract).   Use of derivatives is a highly specialized activity that can involve investment techniques and risks different from, and in some respects greater than, those associated with investing in more traditional investments. Derivatives can be highly complex and highly volatile and may perform in unanticipated ways. The Fund may invest in the following types of futures contracts:

Investment Risk
An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your shares of the Fund, they could be worth less than what you paid for them. Therefore, you may lose money by investing in the Fund.

Issuer Risk
The value of, and/or the return generated by, a security may decline for a number of reasons that directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.

Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably, based on overall economic conditions and other factors, which may negatively affect the Fund’s performance. The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations. During a general downturn in the securities markets, multiple asset classes may decline in value simultaneously. Even when certain securities prices have generally increased over time, there have been periods of price decreases during those times, resulting in losses for investors , which are likely to occur again in the future.

Geopolitical and other events, including war, terrorism, trade disputes, pandemics, public health crises, natural disasters , and   cybersecurity incidents, have led, and in the future may continue to lead, to general instability in world economies and markets and reduced liquidity in securities , which may negatively affect the value of your investment.

Policies established by the  U.S. government and/or Federal Reserve and economic and political circumstances within the U.S. and abroad, such as inflation, changes in interest rates, recessions, changes in government leadership, a government’s inability to agree on a budget , high public debt , the threat or occurrence of a federal government shutdown and threats or the occurrence of a failure to increase the federal government’s debt limit, which could result in a default on the government’s obligations, may negatively affect investor and consumer confidence and may negatively impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Markets and market participants are increasingly reliant upon public and proprietary data and systems. Data or technology malfunctions and inaccuracies may disrupt markets and lead to negative consequences for market participants like the Fund .  

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Micro-Capitalization Companies Risk
Micro-capitalization companies are subject to substantially greater risks of loss and price fluctuations, sometimes rapidly and unpredictably, because their earnings and revenues tend to be less predictable. Since micro-capitalization companies may not have an operating history, product lines, or financial resources, their share prices tend to be more volatile and their markets less liquid than companies with larger market capitalizations, and they can be sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings. The shares of micro-capitalization companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the future ability to sell these securities.

Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility, which at times can be rapid and unpredictable, than investing in larger-capitalization and more established companies. Since mid-capitalization companies may have narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity, and they can be particularly sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings.

Multiple Sub-Advisor Risk
The Manager may allocate the Fund’s assets among multiple sub-advisors, each of which is responsible for investing its allocated portion of the Fund’s assets. To a significant extent, the Fund’s performance will depend on the success of the Manager in selecting and overseeing the sub-advisors and allocating the Fund’s assets to sub-advisors. The sub-advisors’ investment styles may not work together as planned, which could adversely affect the performance of the Fund. In addition, because each sub-advisor makes its trading decisions independently, the sub-advisors may purchase or sell the same security at the same time without aggregating their transactions. This may cause unnecessary brokerage and other expenses.

Other Investment Companies Risk
To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund’s direct fees and expenses. To the extent the Fund invests in other investment companies that invest in equity securities, fixed-income securities and/or foreign securities, or that track an index, the Fund is subject to the risks associated with the underlying investments held by the investment company or the index fluctuations to which the investment company is subject. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

Quantitative Strategy Risk
The success of the Fund’s investment strategy may depend in part on the effectiveness of a  sub-advisor’s quantitative tools for screening securities. These strategies may incorporate factors that are not predictive of a security’s value. The quantitative tools may not react as expected to market events, resulting in losses for the Fund. Additionally, a previously successful strategy may become outdated or inaccurate, which may not be identified by a sub-advisor and therefore may also result in losses. The use of artificial intelligence or other evolving or emerging technologies presents significant risks and may exacerbate the aforementioned risks.

Redemption Risk
The Fund may experience periods of high levels of redemptions that could cause the Fund to sell assets at inopportune times or at a loss or depressed value. Heavy redemptions could hurt the Fund’s performance. The sale of assets to meet redemption requests may create net capital gains, which could cause the Fund to have to distribute substantial capital gains. Redemption risk is greater to the extent that one or more investors or intermediaries control a large percentage of investments in the Fund. In addition, redemption risk is heightened during periods of declining or illiquid markets. During periods of heavy redemptions, the Fund may borrow funds through the interfund credit facility or from a bank line of credit, which may increase costs.

Sector Risk
When the Fund focuses its investments in certain sectors of the economy, its performance could fluctuate more widely than if the Fund were invested more evenly across sectors. Issuers in the same economic sector may be similarly affected by economic or market events, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. Additionally, individual sectors may be more volatile, and may perform differently, than the broader market. As the Fund’s portfolio changes over time, the Fund’s exposure to a particular sector may become higher or lower.

Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks: (i) the securities in which the Fund reinvests cash collateral may decrease in value, causing the Fund to incur a loss, or may not perform sufficiently to cover the Fund’s payment to the borrower of a pre-negotiated fee or “rebate” for the use of that cash collateral in connection with the loan; (ii) non-cash collateral may decline in value, resulting in the Fund becoming under-secured; (iii) delays may occur in the recovery of loaned securities from borrowers, which could result in the Fund being unable to vote proxies or settle transactions or cause the Fund to incur increased costs; and (iv) if the borrower becomes subject to insolvency or similar proceedings, the Fund could incur delays in its ability to enforce its rights in its collateral.

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Securities Selection Risk
Securities selected for the Fund may not perform to expectations. This could result in the Fund’s underperformance compared to its performance index(es), or other funds with similar investment objectives or strategies.

Small-Capitalization Companies Risk
Investing in the securities of small-capitalization companies involves greater risk and the possibility of greater price volatility, which at times can be rapid and unpredictable, than investing in larger-capitalization and more established companies. Since small-capitalization companies may have narrower commercial markets, and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity and they can be particularly sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings.

Value Stocks Risk
Value stocks are subject to the risk that their intrinsic or full value may never be realized by the market, that a stock judged to be undervalued may be appropriately priced, or that their prices may decline. Although value stocks tend to be inexpensive relative to their earnings, they can continue to be inexpensive for long periods of time. The Fund’s investments in value stocks seek to limit potential downside price risk over time; however, value stock prices still may decline substantially. In addition, the Fund may produce more modest gains as a trade-off for this potentially lower risk. The Fund’s investment in value stocks could cause the Fund to underperform funds that use a growth or non-value approach to investing or have a broader investment style.

Fund Performance

The bar chart and table below provide an indication of risk by showing changes in the Fund’s performance over time. The bar chart shows how the Fund’s performance has varied from year to year. The table shows how the Fund’s average annual total returns compare to a broad-based securities market index, as well as an additional market index with characteristics that are similar to those of the Fund, for the periods indicated.

The chart and the table show the performance of the Fund’s Investor Class shares for all periods. In the table below, for the period prior to February 28, 2017, the performance of R6 Class shares reflects the returns of the R5 Class shares of the Fund. The R6 Class would have had similar annual returns to the R5 Class shares of the Fund because the shares of each class represent investments in the same portfolio securities. However, as reflected in the table in the “Fees and Expenses of the Fund” section of this Fund Summary, the expenses of the R5 Class shares differ from those of the R6 Class shares, which would affect performance. To the extent that the R5 Class shares may have had lower expenses than the R6 Class shares prior to February 28, 2017, the performance of the R5 Class shares would likely have been higher than the performance the R6 Class shares would have realized during the same period. The performance of the R6 Class shares shown in the table has not been adjusted for differences in operating expenses between the R6 Class shares and R5 Class shares. C Class shares automatically convert to A Class shares 8 years after purchase, if the conversion is available through your financial intermediary. In the table below, the performance for C Class shares reflects the performance as though C Class shares were held for the full 10-year period.  

You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Average annual total returns for periods ended December 31, 2025

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After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. If you are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account (“IRA”) or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares of the Fund; after-tax returns for other share classes will vary.

Management

The Manager
The Fund has retained American Beacon Advisors, Inc. to serve as its Manager.

Sub-Advisors
The Fund’s assets are currently allocated among the following investment sub-advisors:

Portfolio Managers

Purchase and Sale of Fund Shares

You may buy or sell shares of the Fund through a retirement plan, an investment professional, a broker-dealer, or other financial intermediary. You may purchase or redeem shares of the Fund on any day the New York Stock Exchange (“NYSE”) is open, at the Fund’s net asset value (“NAV”) per share next calculated after your order is received in proper form, subject to any applicable sales charge. The Manager may, in its sole discretion, allow certain individuals to invest directly in the Fund. For more information regarding eligibility to invest directly please see “About Your Investment - Purchase and Redemption of Shares.” Direct mutual fund account shareholders may buy subsequent shares or sell shares in various ways:

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Tax Information

Dividends, capital gains distributions, and other distributions, if any,  that you receive as a result of your investment in the Fund are subject to federal income tax and may also be subject to state and local income taxes, unless you are a tax-exempt entity or your account is  tax-deferred,  such as an individual retirement account (“IRA”) or a 401(k) plan (in which case you may be taxed later, upon the withdrawal of your investment from such account or plan).

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and the Fund’s distributor, Resolute Investment Distributors, Inc., or the Manager may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your individual financial professional to recommend the Fund over another investment. Ask your individual financial professional or visit your financial intermediary’s website for more information.

Additional Information About the Fund

To help you better understand the Fund , this section provides a detailed discussion of the Fund’s investment policies, its principal strategies, principal risks, and performance indices. However, this Prospectus does not describe all of   the Fund’s investment practices. Capitalized terms that are not otherwise defined are defined in Appendix B. For additional information, please see the Fund’s SAI, which is available at www.americanbeaconfunds.com or by contacting us via telephone at 1-800-658-5811, by U.S. mail at P.O. Box 219643, Kansas City, MO 64121-9643, or by e-mail at [email protected].

Additional Information About Investment Policies and Strategies

Investment Objectives

The Fund’s investment objectives are long-term capital appreciation and current income .

The  Fund’s investment objectives are “fundamental,” which means that it may be changed only with the approval of Fund shareholders.

80% Investment Policy

If the Fund changes its 80% investment policy, a notice will be sent to shareholders at least 60 days in advance of the change and this prospectus will be supplemented.

Temporary Defensive Policy

The Fund may depart from its principal investment strategy by taking temporary defensive or interim positions in response to adverse market, economic, political, or other conditions. During these times, the Fund may not achieve its investment objectives .

Additional Information About the Management of the Fund

The Fund has retained American Beacon Advisors, Inc. to serve as its Manager. The Manager may allocate the assets of the Fund among different sub-advisors. The Manager provides or oversees the provision of all administrative, investment advisory and portfolio management services to the Fund . The Manager:

The Fund’s assets are allocated among one or more sub-advisors by the Manager. Each sub-advisor has full discretion to purchase and sell securities for its segment of the Fund’s assets in accordance with the Fund’s objectives, policies, restrictions and more specific strategies provided by the Manager. The Manager oversees the sub-advisors but does not reassess individual security selections made by the sub-advisors for their portfolios.

In the future, the Manager may allocate the Fund’s assets to a different sub-advisor, and/or to one or more additional sub-advisors. The Fund operates in a manager-of-managers structure. The Fund and the Manager have received an exemptive order from the SEC that permits the Fund , subject to certain conditions and approval by the Board, to hire and replace sub-advisors, and materially amend agreements with sub-advisors, that are unaffiliated with the

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Manager without approval of the shareholders. In the future, the Fund and the Manager may rely on an SEC staff no-action letter, dated July 9, 2019, that would permit the Fund to expand its exemptive relief to hire and replace sub-advisors that are affiliated and unaffiliated with the Manager without shareholder approval, subject to approval by the Board and other conditions. The Manager has ultimate responsibility, subject to oversight by the Board, to oversee sub-advisors and recommend their hiring, termination and replacement.

The SEC order also exempts the Fund from disclosing the advisory fees paid by the Fund to individual sub advisors in a multi-manager fund in various documents filed with the SEC and provided to shareholders. In the  future, the Fund may rely on the SEC staff no-action letter to expand its exemptive relief to individual sub-advisors that are affiliated with the Manager. Under that no-action letter, the fees payable to sub-advisors unaffiliated with or partially-owned by the Manager or its parent company would be aggregated, and fees payable to sub-advisors that are wholly-owned by the Manager or its parent company, if any, would be aggregated with fees payable to the Manager. Whenever a sub-advisor change is proposed in reliance on the order, in order for the change to be implemented, the Board, including a majority of its “non-interested” trustees, must approve the change. In addition, the Fund is required to provide shareholders with certain information regarding any new sub-advisor within 90 days of the hiring of any new sub-advisor.

The Fund’s assets are allocated among the following investment sub-advisors:

As of the date of this Prospectus, the Fund’s assets are allocated among the sub-advisors generally on an equal basis. The Manager intends to allocate new assets among the Fund’s sub-advisors generally equally, as permitted by their respective capacity commitments to the Fund and other considerations by the Manager.

Additional Information About Investments

This section provides more detailed information regarding certain of the Fund’s principal investment strategies as well as information regarding the Fund’s strategy with respect to investment of cash balances.

Cash Management
To gain market exposure on cash balances held in anticipation of liquidity needs or to reduce market exposure in anticipation of liquidity needs, the Fund may utilize the following investments:

Equity Investments
The  Fund’s equity investments may include:  

Other Investment Companies
The  Fund, at times, may invest in shares of other investment companies. The Fund may invest in securities of an investment company advised by the Manager, with respect to which the Manager also receives a management fee. Investments in the securities of other investment companies may involve duplication of advisory fees and certain other expenses. By investing in another investment company, the Fund becomes a shareholder of that investment company. As a result, Fund shareholders indirectly will bear the Fund’s proportionate share of the fees and expenses paid by shareholders of the other investment company,

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in addition to the fees and expenses Fund shareholders directly bear in connection with the Fund’s own operations. These other fees and expenses, if applicable, are reflected as Acquired Fund Fees and Expenses and are included in the Fees and Expenses Table for the Fund in this Prospectus. Investment in other investment companies may involve the payment of substantial premiums above the value of such issuer’s portfolio securities.

Additional Information About Risks

The greatest risk of investing in a mutual fund is that its returns will fluctuate and you could lose money. The following table identifies the risk factors of each Fund in light of each Fund’s respective principal investment strategies. These risk factors are explained following the table. References to “the Fund” and “a Fund” in the risk explanations are intended to refer the Fund(s) identified in the table as having that risk factor. The principal risks of investing in each Fund listed below are presented in alphabetical order and not in order of importance or potential exposure. Among other matters, this presentation is intended to facilitate your ability to find particular risks and compare them with the risks of other funds. Each risk summarized below is considered a “principal risk” of investing in a Fund, regardless of the order in which it appears.

Cybersecurity and Operational Risk
Operational risks arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents may negatively impact the Fund, its service providers, and third-party fund distribution platforms, including the ability of shareholders to transact in   the Fund’s shares, and result in financial losses. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, shareholder data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. Cybersecurity incidents can result from deliberate attacks or unintentional events. A cybersecurity incident could, among other things, result in the loss or theft of shareholder data or funds, shareholders or service providers being unable to access electronic systems (also known as “denial of services”), loss or theft of proprietary information or financial data, the inability to process Fund transactions, interference with the Fund’s ability to calculate its NAV, impediments to trading, physical damage to a computer or network system, or remediation costs associated with system repairs. The occurrence of any of these problems could result in a loss of information, violations of applicable privacy and other laws, regulatory scrutiny, penalties, fines, reputational damage, additional compliance requirements, and other consequences, any of which could have a material adverse effect on the Fund or its shareholders. Market events also may occur at a pace that overloads current information technology and communication systems and processes of the Fund, its service providers or other market participants, such as third-party distribution platforms, which could impact the ability of the Fund to conduct operations or of shareholders to transact the Fund’s shares.

The Manager, through its monitoring and oversight of Fund service providers, endeavors to determine that service providers take appropriate precautions to avoid or mitigate risks that could lead to problems discussed above. While the Manager has established business continuity plans and risk management systems seeking to address these problems, there are inherent limitations in such plans and systems, and it is not possible for the Manager, other Fund service providers, or third-party fund distribution platforms to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Recent geopolitical tensions may increase the scale and sophistication of deliberate attacks, particularly those from nation-states or from entities with nation-state backing. The  Fund cannot control the cybersecurity plans and systems of its service providers, its counterparties, third-party fund distribution platforms,  or the issuers of securities in which the Fund invests. The issuers of the Fund’s investments are likely to be dependent on computers for their operations and require ready access to their data and the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of the Fund’s investments, leading to significant loss of value.

Dividend Risk
The  Fund’s investments in dividend-paying stocks could cause the  Fund to underperform funds that invest without consideration of a company’s track record of paying dividends. An issuer of stock held by the  Fund may choose not to declare a dividend or the dividend rate might not remain at current levels or increase over time. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks. In addition, stocks of companies with a history of paying dividends may not participate in a broad market advance to the same degree as most other stocks, and a sharp rise in interest rates or an economic downturn could cause a company to unexpectedly reduce or eliminate its dividend. Securities that pay dividends may be sensitive to changes in interest rates, and as interest rates rise, the prices of such securities may fall. At times, the  Fund may not be able to identify dividend-paying stocks that are attractive investments. The income received by the  Fund will also fluctuate due to the amount of dividends that companies elect to pay.

Equity Investments Risk
Equity securities represent ownership interests in companies and  are subject to investment risk, issuer risk and market risk. In general, the values of stocks and other equity securities fluctuate, and sometimes widely fluctuate, in response to changes in a company’s financial condition as well as general market, economic and political conditions and other factors. The Fund may experience a significant or complete loss on its investment in an equity security. In addition, stock prices may be particularly sensitive to rising interest rates, which increase borrowing costs and the costs of capital. The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

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Futures Contracts Risk
Futures contracts are derivative instruments pursuant to a contract where the parties agree to a fixed price for an agreed amount of securities or other underlying assets at an agreed date.  The use of futures contracts may expose the Fund to additional risks, such as credit risk, liquidity risk, and counterparty risk, that it would not be subject to if it invested directly in the securities underlying those futures contracts. There can be no assurance that any strategy used will succeed. There may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or index. Futures contracts may experience potentially dramatic price changes and imperfect correlations between the price of the contract and the underlying security, index or currency, which may increase the volatility of the  Fund. An abrupt change in the price of an underlying security could render the underlying derivative instrument worthless. Futures contracts may involve a small investment of cash (the amount of initial and variation margin) relative to the magnitude of the risk assumed (the potential increase or decrease in the price of the futures contract). There can be no assurance that, at all times, a liquid market will exist for offsetting a futures contract that the  Fund has previously bought or sold and this may result in the inability to close a futures contract when desired. Futures contracts are subject to the risk that an exchange may impose price fluctuation limits, which may make it difficult or impossible for the Fund to close out a position when desired. When the  Fund purchases or sells a futures contract, it is subject to daily variation margin calls that could be substantial. If the  Fund has insufficient cash to meet daily variation margin requirements, it might need to sell securities at a time when such sales are disadvantageous. Use of derivatives is a highly specialized activity that can involve investment techniques and risks different from, and in some respects greater than, those associated with investing in more traditional investments. Derivatives can be highly complex and highly volatile and may perform in unanticipated ways. The Fund may invest in the following types of futures contracts:  

Investment Risk
An investment in the  Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The  Fund should not be relied upon as a complete investment program. The share price of the  Fund fluctuates, which means that when you sell your shares of the  Fund, they could be worth less than what you paid for them. Therefore, you may lose money by investing in the  Fund.

Issuer Risk
The value of, and/or the return generated by, a security may decline for a number of reasons that directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets. When the issuer of a security implements strategic initiatives, including mergers, acquisitions and dispositions, there is the risk that the market response to such initiatives will cause the share price of the issuer’s securities to fall. An individual security may be more volatile, and may perform differently, than the market as a whole.

Market Risk
The  Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably, based on overall economic conditions and other factors, which may negatively affect   the Fund’s performance. Even when securities markets perform well, there is no assurance that the investments held by  the Fund will increase in value along with the broader market. Equity securities generally have greater price volatility than fixed-income securities, although under certain market conditions fixed-income securities may have comparable or greater price volatility. The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations. During a general downturn in the securities markets, multiple asset classes may decline in value simultaneously. During times of market turmoil, investors tend to look to the safety of securities issued or backed by the U.S. Treasury, causing the prices of these securities to rise and the yields to decline. In some cases, traditional market participants have been less willing to make a market in some types of debt instruments, which has affected the liquidity of those instruments. Reduced liquidity in fixed-income and credit markets may negatively affect many issuers worldwide. Prices in many financial markets have increased significantly over the last 10-15 years , but there have also been periods of adverse market and financial developments and cyclical change during that timeframe, which have resulted in unusually high levels of volatility in domestic and foreign financial markets that has caused losses for investors and may occur again in the future, particularly if markets enter a period of uncertainty or economic weakness. Periods of unusually high volatility in the financial markets and restrictive credit conditions, sometimes limited to a particular sector or geographic region, continue to recur. The value of a security may decline due to adverse issuer-specific conditions or general market conditions unrelated to a particular issuer, such as real or perceived adverse geopolitical, regulatory, market, economic or other developments that may cause broad changes in market value, changes in the general outlook for corporate earnings, changes in interest, currency or inflation rates, lack of liquidity in the markets, public perceptions concerning these developments or adverse market sentiment generally. The value of a security may also decline due to factors that affect a particular industry or industries, such as tariffs, labor shortages or increased production costs and competitive conditions within an industry. Changes in the financial condition of a single issuer or market segment also can impact the market as a whole.

Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, pandemics, public health crises, natural disasters, and   cybersecurity incidents , have led, and in the future may continue to lead, to general instability in world economies and markets and reduced liquidity in securities , which may negatively affect the value of your investment. Such market disruptions have caused, and may continue to cause, broad changes in market value, negative public perceptions concerning these developments, a reduction in the willingness and ability of some lenders to extend credit, difficulties for some borrowers in obtaining financing on attractive terms, if at all, and adverse investor sentiment or publicity. Changes in value may be temporary or may last for extended periods. Adverse market events may also lead to increased shareholder redemptions, which could cause the Fund to sell investments at an inopportune time to meet redemption requests by shareholders and may increase the Fund’s portfolio turnover, which could increase the costs that   the Fund incurs and lower   the Fund’s performance.  

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Policies established by the  U.S. government and/or Federal Reserve and economic and political circumstances within the U.S. and abroad, such as inflation, changes in interest rates, recessions, changes in government leadership, a government’s inability to agree on a budget , high public debt , the threat or occurrence of a federal government shutdown and threats or the occurrence of a failure to increase the federal government’s debt limit, which could result in a default on the government’s obligations, may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets .

Markets and market participants are increasingly reliant upon both publicly available and proprietary information data systems. Data imprecision, software or other technology malfunctions, programming inaccuracies, unauthorized use or access, and similar circumstances may impair the performance of these systems and may have an adverse impact upon a single issuer, a group of issuers, or the market at large. In certain cases, an exchange or market may close or issue trading halts on either specific securities or even the entire market, which may result in the Fund being, among other things, unable to buy or sell certain securities or financial instruments or accurately price its investments.

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Micro-Capitalization Companies Risk
Micro-capitalization companies are subject to substantially greater risks of loss and price fluctuations, sometimes rapidly and unpredictably, because their earnings and revenues tend to be less predictable. In addition, some companies may experience significant losses. Since micro-capitalization companies may not have an operating history, product lines, or financial resources, their share prices also tend to be more volatile and their markets less liquid than companies with larger market capitalizations, and they can be sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings. The shares of micro-capitalization companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the future ability to sell these securities. Micro-capitalization companies face greater risk of business failure, which could increase the volatility of the  Fund’s portfolio.

Mid-Capitalization Companies Risk
Investments in mid-capitalization companies generally involve greater risks and the possibility of greater price volatility, which at times can be rapid and unpredictable, than investments in larger, more established companies. Mid-capitalization companies often have narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies. As a result, performance can be more volatile and they may face greater risk of business failure, which could increase the volatility of the Fund’s portfolio. Generally, the smaller the company size, the greater these risks. Additionally, mid-capitalization companies may have less market liquidity than large-capitalization companies, and they can be sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings.

Multiple Sub-Advisor Risk
The Manager may allocate the Fund’s assets among multiple sub-advisors, each of which is responsible for investing its allocated portion of the Fund’s assets. To a significant extent, the Fund’s performance will depend on the success of the Manager in selecting and overseeing the sub-advisors and allocating the Fund’s assets to sub-advisors. The sub-advisors’ investment styles may not work together as planned, which could adversely affect the performance of the Fund. Because each sub-advisor manages its allocated portion of the Fund independently from another sub-advisor, the same security may be held in different portions of the Fund, or may be acquired for one portion of the Fund at a time when a sub-advisor to another portion deems it appropriate to dispose of the security from that other portion, resulting in higher expenses without accomplishing any net result in the Fund’s holdings. Similarly, under certain market conditions, one sub-advisor may believe that temporary, defensive investments in short-term instruments or cash are appropriate when another sub-advisor believes continued exposure to the equity or debt markets is appropriate for its allocated portion of the Fund. Because each sub-advisor directs the trading for its own portion of the Fund, and does not aggregate its transactions with those of the other sub-advisors, the Fund may incur higher brokerage costs than would be the case if a single sub-advisor were managing the entire Fund. In addition, while the Manager seeks to allocate the Fund’s assets among the Fund’s sub-advisors in a manner that it believes is consistent with achieving the Fund’s investment objective(s), the Manager may be subject to potential conflicts of interest in allocating the Fund’s assets among sub-advisors, due to factors that could impact the Manager’s revenues and profits.

Other Investment Companies Risk
To the extent that the  Fund invests in shares of other registered investment companies, the  Fund will indirectly bear the fees and expenses, including, for example, advisory and administrative fees, charged by those investment companies in addition to the  Fund’s direct fees and expenses. If the Fund invests in other investment companies, the Fund may receive distributions of taxable gains from portfolio transactions by that investment company and may recognize taxable gains from transactions in shares of that investment company, which could be taxable to the Fund’s shareholders when distributed to them. The  Fund must rely on the investment company in which it invests to achieve its investment objectives . If the investment company fails to achieve its investment   objectives , the value of   the  Fund’s investment may decline, adversely affecting the  Fund’s performance. To the extent the  Fund invests in other investment companies that invest in equity securities, fixed-income securities and/or foreign securities, or that track an index, the  Fund is subject to the risks associated with the underlying investments held by the investment company or the index fluctuations to which the investment company is subject.   The  Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

Quantitative Strategy Risk
The success of the  Fund’s investment strategy may depend in part on the effectiveness of a  sub-advisor’s quantitative tools for screening securities. Securities selected using quantitative analysis can react differently to issuer, political, market, and economic developments than the market as a whole or securities selected using only fundamental analysis, which could adversely affect their value. As a result, a portfolio of securities selected using quantitative analysis may underperform the market as a whole or a portfolio of securities selected using a different investment approach, such as fundamental analysis. A  sub-advisor’s quantitative tools may use factors that may not be predictive of a security’s value, and any changes over time in the factors that affect a security’s value may not be reflected in the quantitative model. The quantitative tools may not react as expected to market events, resulting in losses for the Fund. Data for some companies, particularly for non-U.S. companies, may be less available and/or less current than data for other companies. There may also be errors, omissions, imperfections or malfunctions in the computer code for the quantitative model or in the model itself, or issues relating to the computer systems used to screen securities. A  sub-advisor’s investment selection can be adversely affected if it relies on insufficient, erroneous or outdated data or flawed models or computer systems. Additionally, a previously successful strategy may become outdated or inaccurate, which may not be identified by  a sub-advisor and therefore may also result in losses. No assurance can be given that a model will be successful under all or any market conditions. The use of artificial intelligence or other evolving or emerging technologies presents significant risks and may exacerbate the aforementioned risks.

Redemption Risk
The  Fund may experience periods of heavy redemptions that could cause the Fund to sell assets at inopportune times or at a loss or a depressed value. Heavy redemptions, whether by a few large investors or many smaller investors, could hurt the Fund’s performance. Redemption risk is greater to the extent that one or more investors or intermediaries control a large percentage of investments in the Fund, have short investment horizons, or have unpredictable cash flow needs. The risk of loss is also greater if redemption requests are frequent, occur in times of overall market turmoil or declining prices for the securities sold, or when the securities the Fund wishes to sell are illiquid. Certain securities that were liquid when purchased may later become illiquid, particularly in times of overall economic distress. During periods of heavy redemptions, the Fund may borrow funds through the interfund credit facility, or from a bank line of credit, which may increase costs. The sale of assets to meet redemption requests may create net capital gains or losses, which could cause the Fund to have to distribute substantial capital gains.

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Sector Risk
Sector risk is the risk associated with the Fund holding a significant amount of investments in issuers conducting business in a related group of industries within the same economic sector, which may be similarly affected by particular economic or market events. To the extent the Fund has substantial holdings within a particular sector, the risks to the Fund associated with that sector increase and the Fund may perform poorly during a downturn in one or more of the industries within that sector. In addition, when the Fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the Fund were invested more evenly across sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react the same way to economic, political or regulatory events. The Fund’s performance could also be adversely affected if the sectors do not perform as expected. The lack of exposure to one or more industries within a sector may adversely affect performance. As the Fund’s portfolio changes over time, the Fund’s exposure to a particular sector may become higher or lower.

Securities Lending Risk
The Fund may lend its portfolio securities to brokers, dealers and financial institutions in order to obtain additional income. Borrowers of the Fund’s securities provide collateral either in the form of cash, which the Fund reinvests in securities or in the form of non-cash collateral consisting of securities issued or guaranteed by the U.S. government or one of its agencies or instrumentalities. The Fund will be responsible for the risks associated with the investment of cash collateral, including any collateral invested in an affiliated government money market fund. The Fund may lose money on its investment of cash collateral or may fail to earn sufficient income on its investment to cover its payment to the borrower of a pre-negotiated fee or “rebate” for the use of that cash collateral in connection with the loan. The Fund could also lose money due to a decline in the value of non-cash collateral. In addition, delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions or could result in increased costs. Moreover, if the borrower becomes subject to insolvency or similar proceedings, the Fund could incur delays in its ability to enforce its rights in its collateral. There also is a risk that a borrower may default on its obligation to return loaned securities at a time when the value of the Fund’s collateral is inadequate. Although the Fund’s securities lending agent may indemnify the Fund against that risk, it is also possible that the securities lending agent will be unable to satisfy its indemnification obligations. In any case in which the loaned securities are not returned to the Fund before an ex-dividend date, whether or not due to a default by the borrower, the payment in lieu of the dividend that the Fund receives from the securities’ borrower would not be treated as a dividend for federal income tax purposes and thus would not qualify for treatment as “qualified dividend income” (as described under “Distributions and Taxes – Taxes” below).

Securities Selection Risk
Securities selected for the Fund may decline substantially in value or may not perform to expectations. Judgments about the attractiveness, value and anticipated price movements of a security or asset class may be incorrect, and there is no guarantee that securities will perform as anticipated. The value of a security can be more or less volatile than the market as a whole, and the  Fund’s strategy may fail to produce the intended results. This could result in the Fund’s underperformance compared to other funds with similar investment objectives.

Small-Capitalization Companies Risk
Investments in small-capitalization companies generally involve greater risks and the possibility of greater price volatility, which at times can be rapid and unpredictable, than investments in larger capitalization and more established companies. Small-capitalization companies often have narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies. As a result, performance of small-capitalization companies can be more volatile and these companies may face greater risk of business failure, which could increase the volatility of the  Fund’s portfolio. Generally, the smaller the company size, the greater these risks. Additionally, small-capitalization companies may have less market liquidity than larger capitalization companies, and they can be sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings.

Value Stocks Risk
Investments in value stocks are subject to the risk that their intrinsic or full value may never be realized by the market, that a stock judged to be undervalued may be appropriately priced, or that their prices may decline. This may result in the value stocks’ prices remaining undervalued for extended periods of time and they may not ever realize their intrinsic or full value. While the Fund’s investments in value stocks seek to limit potential downside price risk over time, value stock prices still may decline substantially. In addition, the Fund may produce more modest gains as a trade-off for this potentially lower risk. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. The Fund’s performance also may be affected adversely if value stocks become unpopular with, or lose favor among, investors. The Fund’s value style could cause it to underperform funds that use a growth or non-value approach to investing or have a broader investment style.

Additional Information About Performance Indices

The Fund’s performance is compared to the  S&P 500^® Index and the Russell 2000^® Value Index . Set forth below is additional information regarding the indices to which the Fund’s performance is compared.

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Notices Regarding Index Data

The S&P 500 Index (“Index”) and associated data are a product of S&P Dow Jones Indices LLC, its affiliates and/or their licensors. and has been licensed for use by the Fund.  S&P^® is a registered trademark of Standard & Poor’s Financial Services LLC (“SPFS”) and Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC (“Dow Jones”). Neither S&P Dow Jones Indices LLC, SPFS, Dow Jones, their affiliates nor their licensors (“S&P DJI”) make any representation or warranty, express or implied, as to the ability of the Index to accurately represent the asset class or market sector that it purports to represent and S&P DJI shall have no liability for any errors, omissions, or interruptions of the Index or the date included therein.

American Beacon Funds is not promoted, sponsored or endorsed by, nor in any way affiliated with Russell Investment Group (“Russell”). Russell is not responsible for and has not reviewed the American Beacon Small Cap Value Fund nor any associated literature or publications and Russell makes no representation or warranty, express or implied, as to their accuracy, or completeness, or otherwise.

Russell reserves the right, at any time and without notice, to alter, amend, terminate or in any way change the Russell Indexes. Russell has no obligation to take the needs of any particular fund or its participants or any other product or person into consideration in determining, composing or calculating any of the Russell Indexes.

Russell’s publication of the Russell Indexes in no way suggests or implies an opinion by Russell as to the attractiveness or appropriateness of investment in any or all securities upon which the Russell Indexes are based. RUSSELL MAKES NO REPRESENTATION, WARRANTY, OR GUARANTEE AS TO THE ACCURACY, COMPLETENESS, RELIABILITY, OR OTHERWISE OF THE RUSSELL INDEXES OR ANY DATA INCLUDED IN THE RUSSELL INDEXES. RUSSELL MAKES NO REPRESENTATION, WARRANTY OR GUARANTEE REGARDING THE USE, OR THE RESULTS OF USE, OF THE RUSSELL INDEXES OR ANY DATA INCLUDED THEREIN, OR ANY SECURITY (OR COMBINATION THEREOF) COMPRISING THE RUSSELL INDEXES. RUSSELL MAKES NO OTHER EXPRESS OR IMPLIED WARRANTY, AND EXPRESSLY DISCLAIMS ANY WARRANTY, OF ANY KIND, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE RUSSELL INDEX(ES) OR ANY DATA OR ANY SECURITY (OR COMBINATION THEREOF) INCLUDED THEREIN.

Fund Management

The Manager

AMERICAN BEACON ADVISORS, INC. (the “Manager”) serves as the Manager and administrator of the Fund . The Manager, located at 220 East Las  Colinas Boulevard, Suite 1200, Irving, Texas 75039, is an indirect wholly-owned subsidiary of Resolute Topco, Inc. (“Topco”), which is owned primarily by various institutional investment funds that are managed by financial institutions and other investment advisory firms. No owner of Topco owns 25% or more of the outstanding equity or voting interests of Topco.

The Manager was organized in 1986 to provide investment management, advisory, and administrative services. The Manager is registered as an investment adviser under the Advisers Act. The Manager is not registered as a CPO with respect to the Fund in reliance on the delayed compliance date provided by No-Action Letter 12-38 of the Division of Swaps Dealer and Intermediary Oversight (“Division”) of the CFTC. Pursuant to this letter, the Manager is not required to register as a CPO, or rely on an exemption from registration, until six months from the date the Division issues revised guidance on the application of the calculation of the de minimis thresholds in the context of the CPO exclusion in CFTC Regulation 4.5. In addition, on behalf of the Fund , the Manager has filed a notice claiming the CFTC Regulation 4.5 exclusion from CPO registration under the Commodity Exchange Act. The Manager is also exempt from registration as a commodity trading advisor under CFTC Regulation 4.14(a)(8) with respect to the Fund .

For the fiscal year ended October 31, 2025, the Fund paid aggregate management fees to the Manager and investment advisory fees to the sub- advisors of 0.70% of the Fund’s average daily net assets, net of any waivers and recoupments of the management and sub-advisory fees .

As compensation for services provided by the Manager in connection with securities lending activities conducted by the Fund, the lending Fund pays to the Manager, with respect to cash collateral posted by borrowers, a fee of 10% of the net monthly investment income (the income earned in the form of interest, dividends and realized capital gains from the investment of cash collateral, plus any negative rebate fees paid by borrowers, less the rebate amount paid to borrowers as well as related expenses) and, with respect to collateral other than cash, a fee up to 10% of loan fees and demand premiums paid by borrowers. The SEC has granted exemptive relief that permits the Fund to invest cash collateral received from securities lending transactions in shares of one or more private or registered investment companies managed by the Manager.

As of the date of this Prospectus, the Fund intends to engage in securities lending activities.  

A discussion of the Board’s consideration and approval of the Management Agreement between the Trust, on behalf of the Fund, and the Manager and the Investment Advisory Agreements among the Trust, on behalf of the Fund, the applicable sub-advisors and the Manager is available in   the Fund’s Annual Financial Statements as filed on Form N-CSR with the SEC for the fiscal period ended October 31, 2025. A discussion of the Board’s consideration and approval of the Investment Advisory Agreement among the Trust, on behalf of the Fund, Westwood and the Manager is available in the Fund’s Semi-Annual Financial Statements as filed on Form N-CSRS with the SEC for the fiscal period ended April 30, 2025 .

The American Beacon team members discussed below are jointly and primarily responsible for the day-to-day management oversight of the sub-advisors, including reviewing the sub-advisors’ performance, allocating the  Fund’s assets among the sub-advisors and the Manager, as applicable, and investing the portion of Fund assets that the sub-advisors determine should be allocated to short-term investments.

Paul B.  Cavazos, Senior Vice President and Chief Investment Officer . Mr. Cavazos became a member of the portfolio management team upon joining the Manager in 2016. Prior to joining the Manager, Mr.  Cavazos was Chief Investment Officer and Assistant Treasurer of DTE Energy from 2007 to 2016.

Colin  J. Hamer, Senior Portfolio Manager, has served on the portfolio management team since 2018. Mr. Hamer has served on the asset management team since January 2015, is a CFA® Charterholder , and has earned the CAIA designation. Prior to joining the Manager, Mr. Hamer worked at Fidelity Investments in various investment-related roles from 2008 to 2014. Mr. Hamer earned a BBA from Texas Christian University.

Robyn A.  Serrano, Portfolio Manager, joined the Manager in 2013. Ms. Serrano has served on the portfolio management team since 2021 and has served on the asset management team since 2018. Prior to joining the Manager, Ms. Serrano worked at Fidelity Investments in various capacities from June 2010 to December 2013. Ms. Serrano has a BS in International Business from Bryant University. Ms. Serrano is a CFA® Charterholder , Certified Investment Management Analyst® (CIMA®) professional, and she holds FINRA Series 7, 63, and 66 licenses

Mr. Cavazos is responsible for recommending sub-advisors to the Funds’ Board of Trustees. Messrs. Brown and Hamer and Ms. Serrano oversee the sub-advisors, review the sub-advisors’ performance and allocate the Funds’ assets among the sub-advisors, as applicable.

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The Funds’  SAI provides additional information about the members of the portfolio management team, including other accounts they manage, their ownership in the Funds they manage and their compensation.

The Sub-Advisors

Set forth below is a brief description of the sub-advisors and the portfolio managers who are jointly and primarily responsible for the day-to-day management of the Fund . The SAI provides additional information about the portfolio managers, including other accounts they manage, their ownership in the Fund and their compensation.

BARROW, HANLEY, MEWHINNEY & STRAUSS, LLC (‘‘Barrow Hanley’’), 2200 Ross Avenue, 31st Floor, Dallas, Texas 75201, is an SEC-registered investment adviser that began conducting business in 1979. Perpetual Limited, an Australian financial services company, holds a 75% interest in Barrow Hanley. As of December 31, 2025 , Barrow Hanley had assets under management of approximately $[XX] billion. Barrow Hanley serves as a sub-advisor to the American Beacon Balanced Fund, American Beacon Large Cap Value Fund, and American Beacon Small Cap Value Fund. Barrow Hanley manages client assets on a team basis for their equity and fixed income strategies. The members of the team for each American Beacon Fund are listed below.

Mark Giambrone  joined Barrow Hanley in 1999. Prior to joining Barrow Hanley, Mr. Giambrone served as a portfolio consultant at HOLT Value Associates. During his career, he has also served as a senior auditor/tax specialist for KPMG Peat Marwick and Ernst & Young Kenneth Leventhal. Mr. Giambrone graduated summa cum laude from Indiana University with a BS in Business and received an MBA from the University of Chicago.

W. Coleman Hubbard, CFA  joined Barrow Hanley in 2012 as an equity analyst, working with the Small Cap Value team. He was promoted to the portfolio management team in January of 2020. Mr. Hubbard began his investment career as an analyst at Bank of America Merrill Lynch. He graduated from Davidson College, where he earned a BA in Economics. Mr. Hubbard is a CFA Charterholder.

Justin Martin, CFA  joined Barrow Hanley in 2004 and has served as a credit analyst in fixed income since 2009. Prior to his work as a credit analyst, Mr. Martin’s work at the firm included market and index research and portfolio analysis. Mr. Martin earned a BBA in Finance from Southern Methodist University. He is a CFA Charterholder .

J. Scott McDonald, CFA  joined Barrow Hanley in 1995. He was appointed Co-Head of Fixed Income, along with Mark Luchsinger, in 2017. Mr. McDonald also serves as the lead portfolio manager for our Long Duration strategies, specializing in corporate and government bonds. He is a CFA Charterholder . During his investment career, Mr. McDonald previously served as senior vice president and portfolio manager at Life Partners Group, Inc. Prior to that, he was a credit supervisor and lending officer for Chase Bank of Texas. Mr. McDonald received an MBA from the University of Texas and a BBA from Southern Methodist University.

Deborah A. Petruzzelli  joined Barrow Hanley in 2003. She serves as our structured securities portfolio manager for mortgage-backed, asset-backed, and commercial mortgage-backed securities. She is also an analyst for structured securities. During her investment career, Ms. Petruzzelli has served as managing director/senior portfolio manager for Victory Capital Management, Inc., where she was responsible for the management of ABS, CMBS, and whole-loan sectors for all client portfolios. She also had an active role in that firm’s development of a core strategy, leveraging the firm’s convertible equity management strengths. Prior to joining Victory, Ms. Petruzzelli worked for McDonald & Company Securities, Inc., as senior vice president for ABS syndication and traded ABS, CMO, and MBS. She earned a BSBA in Business Administration from Bowling Green State University.

Matthew Routh, CFA  joined Barrow Hanley in 2013 and has served as a credit analyst since 2016. Prior to his work as a credit analyst, Mr. Routh’s work at the firm included portfolio analysis. Mr. Routh began his investment career in 2008 at Callan Associates, where he worked in fixed income research. He is a CFA Charterholder . Mr. Routh earned a BA in Economics from the University of Texas and an MA in Economics from the University of California, Santa Barbara.

DJ Taylor, CFA, CAIA  joined Barrow Hanley in 2016 as an equity analyst, focusing on small cap stocks. Prior to joining Barrow Hanley, he served as a senior analyst at Value Management Group. Mr. Taylor earned a BA in Mathematics and Economics from Williams College, where he was an NCAA All-American and school record-holder for the Ephs swimming and diving team. He is a member of the CAIA Association and is a CFA Charterholder .

All of Barrow Hanley’s equity portfolio managers and analysts work as a team for the purposes of generating and researching investment ideas. Portfolio managers have broad research responsibilities, although they focus their efforts on particular sectors. Analysts have specific sector/industry assignments for more specialized, in-depth research.

BRANDYWINE GLOBAL INVESTMENT MANAGEMENT, LLC (“Brandywine Global’’), 1735 Market Street, Suite 1800, Philadelphia, PA 19103, is a professional investment advisory firm founded in 1986. Brandywine Global is a wholly owned indirect subsidiary of Franklin Resources, Inc. As of December 31, 2025 , Brandywine Global had assets under management totaling approximately $ [XX] billion.

Michelle K. Bevan is a portfolio manager and securities analyst on the Diversified Value Equity team. She contributes to the quantitative and fundamental analysis of securities for the Diversified Value Equity portfolios. She is the lead portfolio manager for the Diversified Mid Cap Value strategies. Michelle joined the firm in 1995. She is a CFA® Charterholder and earned an M.B.A. in Finance and a B.S. in Finance from the University of Delaware, graduating cum laude.

Henry F. Otto is the founder and co-lead portfolio manager of the Diversified Value Equity strategies. Prior to joining Brandywine Global in 1988, he was with Dimensional Fund Advisors, Inc., where he managed and traded small cap portfolios and developed computer systems to structure portfolios and analyze performance (1984-1987), and the Chicago Board of Trade as a financial economist developing financial-based futures and options (1982-1984). Mr. Otto is a member of the firm’s Executive Board.

Steve M. Tonkovich is co-lead portfolio manager of the Diversified Value Equity strategies. He plays an integral role in the team’s continual refinement of the Diversified Value Equity investment process and the firm’s ongoing research into value investing. Prior to joining the firm in 1989, he was with the Wharton School of the University of Pennsylvania as a research analyst in the Finance Department (1987-1989) and the Moore School of Electrical Engineering of the University of Pennsylvania as a research assistant (1986-1987). He is a member of the firm’s Executive Board.

DEPRINCE, RACE & ZOLLO, INC. (“DRZ”), 250 Park Avenue South, Suite 250, Winter Park, Florida 32789, is a professional investment advisory firm that was founded in 1995. As of December 31, 2025 , DRZ had approximately $[XX]  billion in assets under management. DRZ serves as a sub-advisor to the American Beacon Small Cap Value Fund.

Gregory Ramsby joined DRZ in 1996. He is a Managing Partner of the firm and sits on the firm’s Management Committee. Mr. Ramsby serves as the Co-Portfolio Manager of the U.S. Small-Cap Value and U.S. Micro-Cap Value disciplines and oversees the portfolio management, research and trading functions of the firm’s U.S. Small-Cap Value and U.S. Micro-Cap Value disciplines. Prior to joining DRZ, Mr. Ramsby was employed at First Union Capital Management as an equity analyst and Associate Portfolio Manager. Prior to that, he was an equity analyst at NationsBank Investment Management. Mr. Ramsby received his Bachelor of Science in Finance from Oglethorpe University and Masters of Business Administration from the University of Notre Dame.

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Randy Renfrow joined DRZ in 2008, and he is a Partner of the firm. Mr. Renfrow serves as the Co-Portfolio Manager for the firm’s U.S. Small-Cap Value, U.S. Micro-Cap Value and U.S. SMID-Cap Value disciplines. Prior to joining DRZ, Mr. Renfrow was employed by Veredus Asset Management where he served as an equity analyst. Prior to that, he was employed by INVESCO, where he also served as an equity analyst. Mr. Renfrow holds the Chartered Financial Analyst designation. He received his Bachelor of Science in Environmental Engineering from Murray State University and Masters of Science in Financial Management from Boston University.

HOTCHKIS AND WILEY CAPITAL MANAGEMENT, LLC (“Hotchkis”), 601 South Figueroa Street, 39th Floor, Los Angeles, California 90017-5704, is a limited liability company, the primary members of which are HWCap Holdings, a limited liability company with members who are current and former employees of Hotchkis, and Stephens-H&W, LLC, a limited liability company whose primary member is SF Holding Corp., which is a diversified holding company. Hotchkis’ predecessor entity was organized as an investment advisor in 1980. As of December 31, 2025 , Hotchkis had approximately $[XX]  billion in investment company and other portfolio assets under management.

Hotchkis serves as a sub-advisor to the American Beacon Balanced Fund, American Beacon Large Cap Value Fund and the American Beacon Small Cap Value Fund. Hotchkis supervises and arranges the purchase and sale of securities held in its respective portions of the Funds’ portfolios.

In addition to the Funds, Hotchkis manages institutional separate accounts and is the advisor and sub-advisor to other mutual funds. The investment process employed is the same for similar accounts, including the Funds and is team-based utilizing primarily in-house, fundamental research. The investment research staff is organized by industry and sector and supports all of the accounts managed in each of Hotchkis’ investment strategies. Portfolio managers for each  strategy ensure that the best thinking of the investment team is reflected in the ‘’target portfolios.’’ Investment ideas for each Fund are generated by Hotchkis’ investment team.

Although portions of the American Beacon Balanced Fund, American Beacon Large Cap Value Fund and American Beacon Small Cap Value Fund are managed by Hotchkis’ investment team, Hotchkis has identified the portfolio managers with the most significant responsibility for Hotchkis’ portion of each Fund’s assets. This list does not include all members of the investment team.

Hotchkis Portfolio Managers for the American Beacon Small Cap Value Fund

David Green and Jim Miles participate in the investment research review and decision-making process for the Fund and coordinate the day-to-day management of the Fund.

David Green, Principal and Portfolio Manager, joined Hotchkis’ investment team in 1997. In his role as portfolio manager, Mr. Green plays an integral part in the investment research review and decision-making process. He coordinates the day-to-day management of small cap value, value opportunities and international value portfolios, represents these strategies to current and prospective clients, as well as provides expertise and insight into Special Situations. Prior to joining the firm, Mr. Green worked as a senior equity analyst with Goldman Sachs Asset Management on the Broad Market Value team. Before joining Goldman Sachs, he worked as an equity analyst with Prudential Investment Corporation where he began his investment career in 1990. Mr. Green’s investment experience is focused primarily on analysis of publicly traded equities. Mr. Green, a CFA® Charterholder, received his BA in Economics with honors from the University of California, Berkeley and is a member of Phi Beta Kappa.

Jim Miles, Principal and Portfolio Manager, joined Hotchkis’ investment team in 1995. Hotchkis’ investment team has managed Hotchkis’ portion of the Fund since its inception in 1998. In his role as portfolio manager, Mr. Miles plays an integral part in the investment research review and decision-making process. He coordinates the day-to-day management of small cap value portfolios, represents all strategies to current and prospective clients, as well as provides expertise and insight into the consumer and technology sectors. Prior to joining the firm, Mr. Miles was a vice president in corporate finance at BT Securities Corporation, an affiliate of Bankers Trust. He specialized in lending to and arranging debt for highly leveraged companies. Mr. Miles received his BS in Mechanical Engineering and MS in Engineering from Stanford University and MBA from the University of California, Los Angeles.

WESTWOOD MANAGEMENT CORP. (“Westwood”) Westwood Management Corp., a New York corporation formed in 1983, serves as a sub-advisor to the American Beacon Small Cap Value Fund. Westwood’s principal place of business is located at 200 Crescent Court, Suite 1200, Dallas, Texas 75201. Westwood is a wholly owned subsidiary of Westwood Holdings Group, Inc., an institutional asset management company. As of December 31, 2025, Westwood had approximately $[XX] billion in assets under management.

William  E. Costello, CFA ^® joined Westwood in 2010 and has served as Senior Vice President, Director of Equity Portfolios since 2018. Mr. Costello serves as Senior Portfolio Manager on the SmallCap Value portfolio team. He is also responsible for investment research within the Energy and Utilities sectors and is a member of the Energy/Utilities research group. Mr. Costello began his career with Investors Bank and Trust in 1992 and subsequently joined Delphi Management and The Boston Company. Mr. Costello earned an MBA from Boston University and a BA in Economics from Marietta College. He is a member of the CFA Institute, the Boston Security Analysts Society and the National Association of Petroleum Investment Analysts.

Matthew R.  Lockridge joined Westwood in 2010 and has served as Senior Vice President and the Head of the U.S. Value division since 2022. He is a Senior Portfolio Manager on the LargeCap Value and SmallCap Value portfolio teams and is responsible for investment research in the Consumer Staples and Consumer Discretionary sectors. Additionally, Mr. Lockridge is a member of the Executive Committee and the Consumer/Health Care research group at Westwood.Mr. Lockridge began his career at Arthur Andersen, LLP, within their Chicago consulting practice. He served as a senior consultant with Deloitte Consulting, LLP, where he assisted clients with various corporate finance and accounting issues. Mr. Lockridge then served as a managing director and partner at Dearborn Partners, LLC, where he was a member of the Investment Committee and oversaw investments in the Consumer and Industrials sectors. Mr. Lockridge earned his MBA with a concentration in finance and accounting from the University of Chicago Booth School of Business and his BBA in finance from Southern Methodist University.

Frederic  Rowsey, CFA ^® joined Westwood in 2010, and has served as Vice President and Research Analyst since 2018. Mr. Rowsey serves as a Portfolio Manager on the SmallCap Value portfolio team and is responsible for investment research in the Consumer Discretionary sector. He is also a member of the Consumer/Health Care research group. Previously, he served as a Research Associate, assisting with research in the Consumer Discretionary, Consumer Staples, Health Care and Energy sectors. Mr. Rowsey graduated from Harvard University with a BA in Economics and a secondary degree in Psychology. Mr. Rowsey is a member of the CFA Institute and the CFA Society of Dallas-Fort Worth.

Jordan  Latimer, CFA ^® has served as a Portfolio Manager on the  SmallCap Value portfolio team since November 2024. He rejoined Westwood in 2023 as Vice President, Research Analyst where he covers the technology and internet sectors. Before rejoining Westwood, Mr. Latimer served as Impact Officer at LCM Group, a family office focused on both public and private investments. Prior to LCM Group, Mr. Latimer was a member of the investment team at Ballast Asset Management, providing investment analysis and portfolio management to a fundamental, value-oriented small-mid cap equity strategy. Mr. Latimer began his career at Westwood in 2011 as a Research Associate; in 2015, he was promoted to Research Analyst, where he was responsible for coverage, research, and idea generation in the Technology, Industrials, and Consumer Discretionary sectors. Mr. Latimer graduated magna cum laude from Mays Business School at Texas A&M University and earned his Bachelor of Business Administration in Accounting and Master of Science in Finance. Mr. Latimer earned his CFA charter in April of 2015.

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Valuation of Shares

The price of the  Fund’s shares is based on its NAV. The  Fund’s NAV per share is computed by adding total assets, subtracting all of the Fund’s liabilities, and dividing the result by the total number of shares outstanding.

The NAV per share of each class of the Fund’s shares is determined based on a pro rata allocation of the Fund’s investment income, expenses and total capital gains and losses. The Fund’s NAV per share is determined each business day as of the regular close of trading on the NYSE, which is typically 4:00 p.m. Eastern Time. However, if trading on the NYSE closes at a time other than 4:00 p.m. Eastern Time, the Fund’s NAV per share typically would still be determined as of the regular close of trading on the NYSE. The Fund does not price its shares on days that the NYSE is closed. Foreign exchanges may permit trading in foreign securities on days when the Fund is not open for business, which may result in the value of the Fund’s portfolio investments being affected at a time when you are unable to buy or sell shares.

Equity securities and certain derivative instruments that are traded on an exchange are valued based on market value. Certain derivative instruments (other than short-term securities) usually are valued on the basis of prices provided by a pricing service. The price of debt securities generally is determined using pricing services or quotes obtained from broker/dealers who may consider a number of inputs and factors, such as comparable characteristics, yield curve, credit spreads, estimated default rates, coupon rates, underlying collateral and estimated cash flow. Investments in other mutual funds are valued at the closing NAV per share of the mutual funds on the day of valuation. Equity securities, including shares of closed-end funds and ETFs, are valued at the last sale price or official closing price.

The valuation of securities traded on foreign markets and certain fixed-income securities will generally be based on prices determined as of the earlier closing time of the markets on which they primarily trade, unless a significant event has occurred. When the Fund holds securities or other assets that are denominated in a foreign currency, the exchange rates as of 4:00 p.m. Eastern Time will normally be used.

Rule 2a-5 under the Investment Company Act establishes requirements for determining fair value in good faith for purposes of the Investment Company Act, including related oversight and reporting requirements. The rule also defines when market quotations are “readily available” for purposes of the Investment Company Act, the threshold for determining whether the Fund must fair value a security.

Among other things, Rule 2a-5 permits the Fund’s board to designate the Fund’s primary investment adviser as “valuation designee” to perform the Fund’s fair value determinations subject to board oversight and certain reporting and other requirements intended to ensure that the registered investment company’s board receives the information it needs to oversee the investment adviser’s fair value determinations. The Board has designated the Manager as valuation designee under Rule 2a-5 to perform fair value functions in accordance with the requirements of Rule 2a-5.

Securities may be valued at fair value, as determined in good faith and pursuant to the Manager’s procedures. For example, fair value pricing will be used when market quotations are not readily available or reliable, as determined by the Manager, such as for fixed-income securities and when: (i) trading for a security is restricted or stopped; (ii) a security’s trading market is closed (other than customary closings); or (iii) a security has been de-listed from a national exchange. A security with limited market liquidity may require fair value pricing if the Manager determines that the available price does not reflect the security’s true market value. In addition, if a significant event that the Manager determines to affect the value of one or more securities held by the Fund occurs after the close of a related exchange but before the determination of the Fund’s NAV per share, fair value pricing may be used on the affected security or securities. Securities of small-capitalization companies are also more likely to require a fair value determination using these procedures because they are more thinly traded and less liquid than the securities of larger capitalization companies. Securities may be fair valued as a result of significant events occurring after the close of the foreign markets in which the Fund invests. In addition,   the Fund may invest in illiquid securities requiring these procedures.

Attempts to determine the fair value of securities introduce an element of subjectivity to the pricing of securities. As a result, the price of a security determined through fair valuation techniques may differ from the price quoted or published by other sources and may not accurately reflect the market value of the security when trading resumes. If a reliable market quotation becomes available for a security formerly valued through fair valuation techniques, the Manager compares the new market quotation to the fair value price to evaluate the effectiveness of the Fund’s fair valuation procedures. You may view the Fund’s most recent NAV per share at www.americanbeaconfunds.com by clicking on ‘‘Quick Links’’ and then ‘‘Daily NAVs.’’

About Your Investment

Choosing Your Share Class

The  Fund offers various classes of shares. Each share class of the  Fund represents an investment in the same portfolio of securities for the Fund, but each class has its own expense structure and combination of purchase restrictions, sales charges and ongoing fees, allowing you to choose the class that best fits your situation.

Factors you should consider when choosing a class of shares include:

Each investor’s financial considerations are different. You should speak with your financial professional to help you decide which share class is best for you.

A Class Charges and Waivers

The table below shows the amount of sales charges you will pay on purchases of A Class shares of the Fund both as a percentage of offering price and as a percentage of the amount you invest. The sales charge differs depending upon the amount you invest and may be reduced or eliminated for larger purchases as indicated below. If you invest more, the sales charge will be lower.

Any applicable sales charge will be deducted directly from your investment. Because of rounding of the calculation in determining the sales charges, you may pay more or less than what is shown in the table below. Shares acquired through reinvestment of dividends or other distributions are not subject to a front-end sales charge. You may qualify for a reduced sales charge or the sales charge may be waived as described below in ‘‘A Class Sales Charge Reductions and Waivers.’’

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A Class Shares

The Distributor retains any portion of the commissions that are not paid to financial intermediaries to solely pay distribution-related expenses. This information is available, free of charge, on the Fund’s website. Please visit www.americanbeaconfunds.com. You may also call 1-800-658-5811 or consult with your financial professional.

A Class Sales Charge Reductions and Waivers

A shareholder may qualify for a waiver or reduction in sales charges under certain circumstances. To receive a waiver or reduction in your A Class sales charge, you must advise the Fund’s transfer agent, your broker-dealer or other financial intermediary of your eligibility at the time of purchase. If you, or your financial intermediary, do not let the Fund’s transfer agent know that you are eligible for a reduction, you may not receive a sales charge discount to which you are otherwise entitled. This information is available, free of charge, on the Fund’s website. Please visit www.americanbeaconfunds.com. You may also call 1-800-658-5811 or consult with your financial professional.

Waiver of Sales Charges

There is no front-end sales charge if you invest $1,000,000 or more in A Class shares of the   Fund .

Sales charges also may be waived for certain shareholders or transactions, such as:

The availability of A Class shares sales charge waivers may depend upon the policies, procedures, and trading platform of your financial intermediary.

Reduced Sales Charges

Under a “Rights of Accumulation Program,” a “Letter of Intent” or through “Concurrent Purchases” you may be eligible to buy A Class shares of the Fund at the reduced sales charge rates that would apply to a larger purchase. The Fund reserves the right to modify or to cease offering these programs at any time.

This information is available, free of charge, on the Fund’s website. Please visit www.americanbeaconfunds.com. You may also call 1-800-658-5811 or consult with your financial professional.

Dealer Concessions on A Class Purchases Without a Front-End Sales Charge

Brokers who initiate and are responsible for purchases of $1,000,000 or more of A Class shares of the Fund may receive a dealer concession from the Fund’s Distributor of 0.50% of the offering price. If a client or broker is unable to provide account verification on purchases of $1,000,000 or more, the dealer concession will be forfeited by the broker and front-end sales loads will apply. Dealer concessions will not be paid on shares purchased by exchange or shares that were previously subject to a front-end sales charge or dealer concession. Dealer concessions will be paid only on eligible purchases where the applicability of the CDSC can be monitored. Purchases eligible for sales charge waivers as described under ‘‘A Class Sales Charge Reductions and Waivers’’ are not eligible for dealer concessions on purchases of $1,000,000 or more.

Rights of Accumulation Program

Under the Rights of Accumulation Program, you may qualify for a reduced sales charge for A Class shares by aggregating all of your investments held in certain accounts (‘’Qualified Accounts’’). The following Qualified Accounts holding any share class of the American Beacon Funds may be grouped together to qualify for the reduced sales charge under the Rights of Accumulation Program or Letter of Intent:

A fiduciary can apply a right of accumulation to all shares purchased for a trust, estate or other fiduciary account that has multiple accounts.

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You must notify your financial intermediary, or the   Fund’s transfer agent, in the case of shares held directly with the Fund, at the time of purchase that a purchase qualifies for a reduced sales charge under the Rights of Accumulation Program. In addition, you must provide either a list of account numbers or copies of account statements verifying your qualification. You may combine the historical cost or current market value, as of the day prior to your additional American Beacon Funds’ purchase (whichever is higher) of your existing American Beacon Funds mutual fund with the amount of your current purchase in order to take advantage of the reduced sales charge. Historical cost is the price you actually paid for the shares you own, plus your reinvested dividends and other distributions. If you are using historical cost to qualify for a reduced sales charge, you should retain any records to substantiate your historical costs since the Fund, its transfer agent or your financial intermediary may not maintain this information.

If your shares are held through financial intermediaries and/or in a retirement account (such as a 401(k) or employee benefit plan), you may combine the current market value of your existing American Beacon Funds mutual fund investment with the amount of your current purchase in order to take advantage of the reduced sales charge. You or your financial intermediary must notify the Fund’s transfer agent at the time of purchase that a purchase qualifies for a reduced sales charge and provide copies of account statements dated within three months of your current purchase verifying your qualification.

Upon receipt of the above referenced supporting documentation, the financial intermediary or the Fund’s transfer agent will calculate the combined value of all of your Qualified Accounts to determine if the current purchase is eligible for a reduced sales charge. Purchases made for nominee or street name accounts (securities held in the name of a dealer or another nominee such as a bank trust department instead of the customer) may not be aggregated with purchases for other accounts and may not be aggregated with other nominee or street name accounts unless otherwise qualified as described above.

Letter of Intent

If you plan to invest at least $50,000 (excluding any reinvestment of dividends and other distributions) during the next 13 months in any class of the Fund, you may qualify for a reduced sales charge for purchases of A Class shares by completing the Letter of Intent section of your account application.

A Letter of Intent indicates your intent to purchase at least $50,000 in any class of the American Beacon Funds over the next 13 months in exchange for a reduced A Class sales charge indicated on the above tables. The minimum initial investment under a Letter of Intent is $2,500. You are not obligated to purchase additional shares if you complete a Letter of Intent. However, if you do not buy enough shares to qualify for the projected level of sales charge by the end of the 13-month period (or when you sell your shares, if earlier), your sales charge will be recalculated to reflect your actual purchase level. During the term of the Letter of Intent, shares representing 5% of your intended purchase will be held in escrow. If you do not purchase enough shares during the 13-month period to qualify for the projected reduced sales charge, the additional sales charge will be deducted from your account. If you have purchased shares of any American Beacon mutual fund within 90 days prior to signing a Letter of Intent, they may be included as part of your intended purchase, however, previous purchase transactions will not be recalculated with the proposed new breakpoint. You must provide either a list of account numbers or copies of account statements verifying your purchases within the past 90 days.

Concurrent Purchases

You may combine simultaneous purchases in shares of any of the American Beacon Funds to qualify for a reduced charge.

CDSC — A Class Shares

Unless a waiver applies, investors who purchase $1,000,000 or more of A Class shares of  a Fund (and, thus, pay no initial sales charge) will be subject to a 0.50% CDSC if those shares are redeemed within 18 months after they are purchased. The CDSC does not apply if you are otherwise eligible to purchase A Class shares without an initial sales charge or are eligible for one of the waivers described herein or in the SAI.

CDSC — C Class Shares

If you redeem C Class shares within 12 months of purchase, you may be charged a CDSC of 1%. The CDSC generally will be deducted from your redemption proceeds. In some circumstances, you may be eligible for one of the waivers described herein or in the SAI. You must advise the transfer agent of your eligibility for a waiver when you place your redemption request.

How CDSCs will be Calculated

The amount of the CDSC will be based on the market value of the redeemed shares at the time of the redemption or the original purchase price, whichever is lower. Because of the rounding of the calculation in determining the CDSC, you may pay more or less than the indicated rate. Your CDSC holding period is based upon the date of your purchase. The CDSCs will be deducted from the proceeds of your redemption, not from amounts remaining in your account. A CDSC is not imposed on any increase in NAV per share over the initial purchase price or shares you received through the reinvestment of dividends or  other distributions.

To keep your CDSC as low as possible, each time you place a request to sell shares, the Fund will redeem your shares in the following order:

Waiver of CDSCs — A and C Class Shares

A shareholder may qualify for a CDSC waiver under certain circumstances. To have your CDSC waived, you must advise the Fund’s transfer agent, your broker-dealer or other financial intermediary of your eligibility at the time of redemption. If you or your financial intermediary do not let the Fund’s transfer agent know that you are eligible for a waiver, you may not receive a waiver to which might otherwise be otherwise entitled.

The CDSC may be waived if:

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The SAI contains further details about the CDSC and the conditions for waiving the CDSC.

Information regarding CDSC waivers for A and C Class shares is available, free of charge, on the   Fund’s website. Please visit www.americanbeaconfunds.com. You may also call 1- ( 800 ) 658-5811 or consult with your financial professional.

Sales Charge Waivers and Reductions Available Through Certain Financial Intermediaries

The availability of certain sales charge waivers and discounts will depend on whether you purchase your shares directly from the Fund or through a financial intermediary. Different intermediaries may impose different sales charges (including potential reductions in or waivers of sales charges). Such intermediary-specific sales charge variations are described in Appendix A to this Prospectus, entitled “Intermediary Sales Charge Discounts, Waivers and Other Information.” Appendix A is incorporated herein by reference (is legally a part of this Prospectus).

In all instances, it is the purchaser’s responsibility to notify the Fund or the purchaser’s financial intermediary at the time of purchase of any relationship or other facts qualifying the purchaser for sales charge waivers or discounts. For waivers and discounts not available through a particular intermediary, shareholders may have to purchase Fund shares through another intermediary to receive these waivers or discounts. This information is available, free of charge, on the Fund’s website. Please visit www.americanbeaconfunds.com. You may also call 1-800-658-5811 or consult with your financial professional.

Conversion of C Class Shares to A Class Shares

C Class shares convert automatically into A Class shares eight (8) years after the initial date of purchase or, if you acquired your C Class shares through an exchange or conversion from another share class, eight (8) years after the date you acquired your C Class shares, provided the conversion is available through your financial intermediary. When C Class shares that you acquired through a purchase or exchange convert to A Class shares, any other C Class shares that you purchased with reinvested dividends and distributions also will convert into A Class shares on a pro rata basis. A different holding period may also apply depending on your intermediary. Certain financial intermediaries may not make this conversion available to their clients. Please see “Appendix A—Intermediary Sales Charge Discounts, Waivers and Other Information” in this Prospectus, or contact your financial intermediary for additional information.

Purchase and Redemption of Shares

Eligibility

The A Class, C Class, Y Class, Advisor Class, R5 Class, and Investor Class shares offered in this Prospectus are available to eligible investors who meet the minimum initial investment. R6 Class shares are available only to participating 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit-sharing and money purchase pension plans, defined benefit plans, non-qualified deferred compensation plans, health savings plans, health savings accounts and funded welfare benefit plans (e.g., Voluntary Employees’ Beneficiary Association (VEBA) and Other Post-Employment Benefits (OPEB) plans). R6 Class shares generally are available only to retirement plans where plan level or omnibus accounts are held on the books of a Fund; however, a Fund reserves the right in its sole discretion to waive this requirement. Generally, R6 Class shares are not available to retail non-retirement accounts, Traditional and Roth IRAs, Coverdell Education Savings Accounts, SEPs, SARSEPs, SIMPLE IRAs and individual 403(b) plans. American Beacon Funds do not accept accounts registered to foreign individuals or entities, including foreign correspondent accounts. The Funds do not conduct operations and are not offered for purchase outside of the United States.

Subject to your eligibility, as described below, you may invest in a Fund directly or through intermediary organizations, such as broker-dealers, insurance companies, plan sponsors, third party administrators, and retirement plans. As described below, the Manager may allow certain individuals to invest directly in a Fund in its sole discretion.

If you are eligible and invest directly with a Fund, the fees and policies with respect to the Fund’s shares that are outlined in this Prospectus are set by the Fund. The Manager and the Funds are not responsible for determining the suitability of the Funds or a share class for any investor.

Because in most cases it is more advantageous for investors using an intermediary to purchase A Class shares than C Class shares for amounts of $1,000,000 or more,  a Fund will decline a request to purchase C Class shares for $1,000,000 or more.

If you invest through a financial intermediary, most of the information you will need for managing your investment will come from your financial intermediary. This includes information on how to buy, sell and exchange shares of  a Fund. If you establish an account through a financial intermediary, the investment minimums described in this section may not apply. Investors investing in  a Fund through a financial intermediary should consult with their financial intermediary to ensure they obtain any proper ‘‘breakpoint’’ discount and all information regarding the differences between available share classes. Your broker-dealer or financial intermediary also may charge fees that are in addition to those described in this Prospectus. Please contact your intermediary for information regarding investment minimums, how to purchase and redeem shares and applicable fees.

Minimum Investment Amount by Share Class

The Manager may allow a reasonable period of time after opening an account for a Y Class or R5 Class investor to meet the initial investment requirement. In addition, for investors such as trust companies and financial professionals who make investments for a group of clients, the minimum initial investment can be met through aggregated purchase orders for more than one client.

R6 Class shares can only be purchased through a participating retirement plan. R6 Class shares are available only to participating 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit-sharing and money purchase pension plans, defined benefit plans, non-qualified deferred compensation plans, health savings plans, health savings accounts and funded welfare benefit plans (e.g., Voluntary Employees’ Beneficiary Association (VEBA) and Other

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Post-Employment Benefits (OPEB) plans). R6 Class shares generally are available only to retirement plans where plan level or omnibus accounts are held on the books of the Fund; however, the Fund reserves the right in its sole discretion to waive this requirement. Generally, R6 Class shares are not available to retail non-retirement accounts, Traditional and Roth IRAs, Coverdell Education Savings Accounts, SEPs, SARSEPs, SIMPLE IRAs and individual 403(b) plans.

Opening an Account

You may open an account through a retirement plan, an investment professional, a broker-dealer, or other financial intermediary. Please contact your financial intermediary for more information on how to open an account. Shares you purchase through your broker-dealer will normally be held in your account with that firm.

Direct mutual fund accounts are not available to new shareholders. Existing direct mutual fund account shareholders may continue to buy or sell shares through their existing direct mutual fund accounts, but will not be able to open new direct mutual fund accounts. The Manager may allow the following individuals or entities to open new direct mutual fund accounts in its sole discretion: (i) corporate accounts, (ii) employees of the Manager, or its direct parent company, Resolute Investment Managers, Inc., and its affiliates and subsidiaries, (iii) employees of a sub-advisor to a fund in the American Beacon Funds Complex, (iv) members of the Board, and (v) members of the Manager’s Board of Directors.

To help the government fight the funding of terrorism and money laundering activities, federal law requires all financial institutions to obtain, verify, and record information that identifies each person who opens an account. When you open an account, you will be asked for information that will allow the Fund or your financial institution to identify you. Non-public corporations and other entities may be required to provide articles of incorporation, trust or partnership agreements, and taxpayer identification numbers on the account or other documentation. The Fund is required by law to reject your new account application if the required identifying information is not provided.

The  Fund reserves the right to liquidate a shareholder’s account at the current day’s NAV per share and remit proceeds via check if the Fund or a financial institution  is unable to verify the shareholder’s identity within three days of account opening.

Purchase Policies

Shares of the Fund are offered and purchase orders are typically accepted until 4:00 p.m. Eastern Time or the close of the NYSE (whichever comes first) on each day on which the NYSE is open for business. If a purchase order is received by the Fund in good order prior to the Fund’s deadline, the purchase price will be the NAV per share next determined on that day, plus any applicable sales charges. A purchase order is considered to be received in good order when it complies with all of the Fund’s applicable policies. If a purchase order is received in good order after the applicable deadline, the purchase price will be the NAV per share of the following day that the Fund is open for business, plus any applicable sales charges. Shares of the Fund will only be issued against full payment, as described more fully in this Prospectus and SAI.

The Fund has authorized certain third-party financial intermediaries, such as broker-dealers, insurance companies, third-party administrators and trust companies, to receive purchase and redemption orders on behalf of the Fund and to designate other intermediaries to receive purchase and redemption orders on behalf of the Fund. The Fund is deemed to have received such orders when they are received by the financial intermediaries or their designees. Thus, an order to purchase or sell Fund shares will be priced at the Fund’s next determined NAV per share after receipt by the financial intermediary or its designee. It is the responsibility of your broker-dealer or financial intermediary to transmit orders that will be received by the Fund in proper form and in a timely manner. The Fund is not responsible for the failure of a broker-dealer or financial intermediary to transmit a purchase order in proper form and in a timely manner.

Fund shares may be purchased only in U.S. States and Territories in which they can be legally sold. Prospective investors should inquire as to whether Fund shares are available for offer and sale in their jurisdiction. The Fund reserves the right to refuse purchases if, in the judgment of the Fund , the transaction would adversely affect the Fund and its shareholders. The Fund has the right to reject any purchase order or cease offering any or all classes of shares at any time. The Fund reserves the right to require payment by wire. Checks to purchase shares are accepted subject to collection at full face value in U.S. funds and must be drawn in U.S. dollars on a U.S. bank. The Fund will not accept ‘‘starter’’ checks, credit card checks, money orders, cashier’s checks, or third-party checks.

If your payment is not received and collected, your purchase may be canceled and you could be liable for any losses or fees the Fund or the Manager has incurred. Under applicable anti-money laundering regulations and other federal regulations, purchase orders may be suspended, restricted or canceled and the monies may be withheld.

Please refer to the section titled ‘‘Frequent Trading and Market Timing’’ for information on the Fund’s policies regarding frequent purchases, redemptions, and exchanges.

Redemption Policies

If you purchased shares of the Fund through your financial intermediary, please contact your broker-dealer or other financial intermediary to sell shares of the Fund. A sale or redemption of your shares is generally taxable to you. See “Distributions and Taxes - Taxes.”

The redemption price will be the NAV per share next determined after a redemption request is received in good order, minus any applicable CDSC. In order to receive the redemption price calculated on a particular business day, redemption requests must be received in good order by 4:00 p.m. Eastern Time or by the close of the NYSE (whichever comes first).

Wire proceeds from redemption requests received in good order by 4:00 p.m. Eastern Time or by the close of the NYSE (whichever comes first) generally are transmitted to shareholders on the next day the Funds are open for business. In any event, proceeds from a redemption request will typically be transmitted to a shareholder by no later than seven days after the receipt of a redemption request in good order. Delivery of proceeds from shares purchased by check, ACH, or pre-authorized automatic investment may be delayed until the funds have cleared, which may take up to ten days.

You may, within 90 days of redemption, reinvest all or part of the proceeds of your redemption of A or C Class shares of a Fund, without incurring any applicable additional sales charge, in the same class of another American Beacon Fund, by sending a written request and a check to your financial intermediary or directly to the Funds. Reinvestment must be into the same account from which you redeemed the shares or received the distribution. Proceeds from a redemption and all dividend payments and other distributions will be reinvested in the same share class from which the original redemption or distribution was made. Reinvestment will be at the NAV per share next calculated after the Funds receive your request. You must notify the Funds and your financial intermediary at the time of investment if you decide to exercise this privilege.

The Funds reserve the right to suspend redemptions or postpone the date of payment for more than seven days (i) when the NYSE is closed (other than for customary weekend and holiday closings); (ii) when trading on the NYSE is restricted; (iii) when the SEC determines that an emergency exists so that disposal of a Fund’s investments or determination of its NAV per share is not reasonably practicable; or (iv) by order of the SEC for protection of the Funds’ shareholders.

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Although the Funds intend to redeem shares by paying out available cash, cash generated by selling portfolio holdings (including cash equivalent portfolio holdings), or funds borrowed through the interfund credit facility, or from a bank line of credit, in stressed market conditions and other appropriate circumstances, the Funds reserve the right to pay the redemption price in whole or in part by borrowing funds from external parties or distributing securities or other assets held by the Funds. To the extent that a Fund redeems its shares in this manner, the shareholder assumes the risk of a subsequent change in the market value of those securities, the cost of liquidating the securities and the possibility of a lack of a liquid market for those securities.

Please refer to the section titled ‘‘Frequent Trading and Market Timing’’ for information on the Funds’ policies regarding frequent purchases, redemptions, and exchanges.

Exchange Policies

If you purchased shares of the Fund through your financial intermediary, please contact your financial intermediary to determine if you may take advantage of the exchange policies described in this section and for the intermediary’s policies to effect an exchange.  

Shares of any class of the Fund may be  exchanged for  shares of the same class of another American Beacon Fund under certain limited circumstances. Since an exchange involves a concurrent redemption and purchase, please review the sections titled ‘‘ Redemption Policies’’ and ‘‘ Purchase Policies’’ for additional limitations that apply to redemptions and purchases. There is no front-end sales charge on exchanges between A Class shares of the Fund for A Class shares of another fund. Shares otherwise subject to a CDSC will not be charged a CDSC in an exchange to shares of another fund that has a CDSC. However, shares exchanged between funds that impose a CDSC will be charged a CDSC if redeemed within 12 months or 18 months, as applicable, of the purchase of the initial shares.

Before exchanging shares, shareholders should consider how the exchange may affect any CDSC that might be imposed on the subsequent redemption of remaining shares.

If Fund shares were purchased by check, a shareholder must have owned those shares for at least ten days prior to exchanging out of the Fund and into another fund.

The eligibility and minimum investment requirement must be met for the class into which the shareholder is exchanging. Fund shares may be acquired through exchange only in U.S. states and Territories in which they can be legally sold. The Fund reserves the right to charge a fee and to modify or terminate the exchange privilege at any time. The Fund reserves the right to refuse exchange requests if, in the judgment of the Fund, the transaction would adversely affect the Fund and its shareholders. Please refer to the section titled “Frequent Trading and Market Timing” for information on the Fund’s policies regarding frequent purchases, redemptions, and exchanges.  

Shares of any class of the Fund may be converted to shares of another class of the Fund under certain limited circumstances.  For federal income tax purposes, the conversion of shares of one share class of the Fund to shares of a different share class of the Fund will not result in the realization of a capital gain or loss. However, an exchange of shares of the Fund for shares of a different American Beacon Fund generally is considered a redemption and a concurrent purchase, respectively, and thus may result in the realization of a capital gain or loss for those purposes.

How to Purchase, Redeem or Exchange Shares

If your account is through a broker-dealer or other financial intermediary, please contact them directly to purchase, redeem or exchange shares of a Fund. Your broker-dealer or financial intermediary can help you open a new account, review your financial needs and formulate long-term investment goals and objectives. Your broker-dealer or financial intermediary will transmit your request to a Fund and may charge you a fee for this service.  A Fund will not accept a purchase order of $1,000,000 or more for C Class shares if the purchase is known to be on behalf of a single investor (not including dealer “street name” or omnibus accounts). Dealers, other financial intermediaries or fiduciaries purchasing shares for their customers are responsible for determining the suitability of a particular share class for an investor. You should include the following information with any order:

Transactions for direct shareholders are conducted through:

Purchases by Wire:

Send a bank wire to State Street Bank and Trust Co. with these instructions:

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Redemption proceeds will be mailed to the account of record or transmitted to commercial bank designated on the account application form.

Supporting documents may be required for redemptions by estates, trusts, guardianships, custodians, corporations, and welfare, pension and profit sharing plans. Redemption requests must also include authorized signature(s) of all persons required to sign for the account. Call 1-800-658-5811 for instructions.

To protect the   Fund and your account from fraud, a Medallion signature guarantee is required for redemption orders:

The   Fund only accepts Medallion signature guarantees, which may be obtained at participating banks, broker-dealers and credit unions. A notary public cannot provide a signature guarantee. Call 1-800-658-5811 for instructions and further assistance.

Payments to Financial Intermediaries

For certain share classes, the Fund and/or the Manager (and/or the Manager’s affiliates), at their own expense, may pay compensation to financial intermediaries for shareholder-related services and, if applicable, distribution-related services, including administrative, sub-transfer agency type, recordkeeping and shareholder communication services. For example, compensation may be paid to make Fund shares available to sales representatives and/or customers of a fund supermarket platform or similar program sponsor or for services provided in connection with such fund supermarket platforms and programs.

The amount of compensation paid to different financial intermediaries may differ. The compensation paid to a financial intermediary may be based on a variety of factors, including average assets under management in accounts distributed and/or serviced by the financial intermediary, gross sales by the financial intermediary and/or the number of accounts serviced by the financial intermediary that invests in the Fund . To the extent that the Fund pays any such compensation, it is designed to compensate the financial intermediary for providing services that would otherwise be provided by the Manager, the Fund or its transfer agent. To the extent the Manager or its affiliates pay such compensation, it would likely include amounts from that party’s own resources and constitute what is sometimes referred to as ‘‘revenue sharing.’’

Compensation received by a financial intermediary from the Fund, the Manager or an affiliate of the Manager may include payments for marketing and/or training expenses incurred by the financial intermediary, including expenses incurred by the financial intermediary in educating (itself and) its salespersons with respect to Fund shares. For example, such compensation may include reimbursements for expenses incurred in attending educational seminars regarding the Fund , including travel and lodging expenses. It may also cover costs incurred by financial intermediaries in connection with their efforts to sell Fund shares, including costs incurred compensating (registered) sales representatives and preparing, printing and distributing sales literature.

Any compensation received by a financial intermediary, whether from the Fund or the Manager and/or its affiliates, and the prospect of receiving it may provide the financial intermediary with an incentive to recommend the shares of the Fund , or a certain class of shares of the Fund , over other potential investments. Similarly, the compensation may cause financial intermediaries to elevate the prominence of the Fund within its organization by, for example, placing it on a list of preferred funds. You can contact your financial intermediary for details about any such payments it receives from the Manager, its affiliates and/or the Fund , or any other fees, expenses, or commissions your financial intermediary may charge you in addition to those disclosed in this Prospectus.

The Fund will not make any of the payments described in this section with respect to its R6 Class shares.

Additional Payments with Respect to Y Class Shares

Y Class shares may also be available on brokerage platforms of firms that have agreements with a Fund’s distributor to offer such shares solely when acting as an agent for the investor. An investor transacting in Y Class shares in these programs may be required to pay a commission and/or other forms of compensation to the broker. Shares of a Fund are available in other share classes that have different fees and expenses.

General Policies

If a shareholder’s account balance falls below the following minimum levels, the shareholder may be asked to increase the balance.

If the account balance remains below the applicable minimum account balance after 45 days, the Fund reserves the right, upon 30 days’ advance written notice, to close the account and send the proceeds to the shareholder. The Fund reserves the authority to modify minimum account balances in its discretion.

A traditional IRA or Roth IRA invested directly will be charged an annual maintenance fee of $15.00 by the Custodian.

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An ACH privilege allows electronic transfer from a checking or savings account into a direct account with the Fund . The ACH privilege may not be used for initial purchases but may be used for subsequent purchases and redemptions. Purchases of Fund shares by ACH are subject to a limit of $2,000 per Fund per day. The Fund reserves the right to waive such limit in its sole discretion.

ACH privileges must be requested on the account application, or may be established on an existing account by submitting a request in writing to the Fund . Validated signatures from all shareholders of record for the account are required on the written request. See details below regarding signature validations. Such privileges apply unless and until the Fund receives written instructions from all shareholders of record canceling such privileges. Changes of bank account information must also be made in writing with validated signatures. The Fund reserves the right to amend, suspend or discontinue the ACH privilege at any time without prior notice. The ACH privilege does not apply to shares held in broker “street name” accounts or in other omnibus accounts.

When a signature validation is called for, a Medallion signature guarantee or SVP stamp may be required. A Medallion signature guarantee is intended to provide signature validation for transactions considered financial in nature, and an SVP stamp is intended to provide signature validation for transactions non-financial in nature. A Medallion signature guarantee or SVP stamp may be obtained from a domestic bank or trust company, broker, dealer, clearing agency, savings association or other financial institution which is participating in a Medallion program or SVP recognized by the Securities Transfer Association. The Fund may reject a Medallion signature guarantee or SVP stamp. Shareholders should call 1-800-658-5811 for additional details regarding the Fund’s signature guarantee requirements.

The following policies apply to instructions you may provide to the Fund by telephone:  

The Fund reserves the right to:  

A shareholder will not be required to pay a CDSC when the registration for A Class or C Class shares is transferred to the name of another person or entity. The transfer may occur by absolute assignment, gift or bequest, as long as it does not involve, directly or indirectly, a public sale of the shares. When A Class or C Class shares are transferred, any applicable CDSC will continue to apply to the transferred shares and will be calculated as if the transferee had acquired the shares in the same manner and at the same time as the transferring shareholder.

Escheatment

Please be advised that certain state escheatment laws may require a Fund to turn over your mutual fund account to the state listed in your account registration as abandoned property unless you contact the Funds. Many states have added ‘‘inactivity’’ or the absence of customer-initiated contact as a component of their rules and guidelines for the escheatment of unclaimed property. These states consider property to be abandoned when there is no shareholder-initiated activity on an account for at least three (3) to five (5) years.

Depending on the laws in your jurisdiction, customer-initiated contact might be achieved by one of the following methods:  

The Funds, the Manager, and the transfer agent will not be liable to shareholders or their representatives for good faith compliance with escheatment laws. To learn more about the escheatment rules for your particular state, please contact your attorney or State Treasurer’s and/or Controller’s Offices. Unless you hold your shares directly with a Fund, you should contact your broker-dealer, retirement plan, or other third-party intermediary regarding applicable state escheatment laws.

Shareholders that reside in the state of Texas may designate a representative to receive escheatment notifications by completing and submitting a designation form that can be found on the website of the Texas Comptroller. While the designated representative does not have any rights to claim or access the shareholder’s account or assets, the escheatment period will cease if the representative communicates knowledge of the shareholder’s location and confirms that the shareholder has not abandoned his or her property. If a shareholder designates a representative to receive escheatment notifications, any escheatment notices will be delivered both to the shareholder and the designated representative. The completed designation form may be mailed to the below address.

Contact information:

Frequent Trading and Market Timing

Frequent trading by Fund shareholders poses risks to other shareholders in the Fund, including: (i) the dilution of the Fund’s NAV per share, (ii) an increase in the Fund’s expenses, and (iii) interference with the portfolio manager’s ability to execute efficient investment strategies. Frequent, short-term trading of Fund shares in an attempt to profit from day-to-day fluctuations in the Fund’s NAV per share is known as market timing. The Funds’ Board has adopted policies and procedures intended to discourage frequent trading and market timing.

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Shareholders may transact one ‘‘round trip’’ in the Fund in any rolling 90-day period. A ‘‘round trip’’ is defined as two transactions, each in an opposite direction. A round trip may involve either (i) a purchase or exchange into the Fund followed by a redemption or exchange out of the Fund or (ii) a redemption or exchange out of the Fund followed by a purchase or exchange into the Fund. If the Manager detects that a shareholder has exceeded one round trip in the Fund in any rolling 90-day period, the Manager, without prior notice to the shareholder,  may prohibit the shareholder from making further purchases of the Fund. In general, the Fund reserves the right to reject any purchase order, terminate the exchange privilege, or liquidate the account of any shareholder that the Manager determines has engaged in frequent trading or market timing, regardless of whether the shareholder’s activity violates any policy stated in this Prospectus. Additionally, the Manager may , in its discretion, reject any purchase or exchange into the Fund from any individual investor, institutional investor, or group whose trading activity could disrupt the management of the Fund or dilute the value of the Fund’s shares, including collective trading (e.g. following the advice of an investment newsletter). Such investors may be barred from future purchases of American Beacon Funds.

The round-trip limit does not apply to the following transaction types:

Financial intermediaries that offer Fund shares, such as broker-dealers, third - party administrators of retirement plans, and trust companies, will be asked to enforce the Fund’s policies to discourage frequent trading and market timing by investors. However, certain intermediaries that offer Fund shares have informed the Fund that they are currently unable to enforce the Fund’s policies on an automated basis. In those instances, the Manager will monitor trading activity of the intermediary in an attempt to detect patterns of activity that indicate frequent trading or market timing by underlying investors. In some cases, intermediaries that offer Fund shares have their own policies to deter frequent trading and market timing that differ from the Fund’s policies. The Fund may defer to an intermediary’s policies. For more information, please contact the financial intermediary through which you invest in the Fund .

The Manager monitors trading activity in the Fund to attempt to identify shareholders engaged in frequent trading or market timing. The Manager may exclude transactions below a certain dollar amount from monitoring and may change that dollar amount from time to time. The ability of the Manager to detect frequent trading and market timing activity by investors who own shares through an intermediary is dependent upon the intermediary’s provision of information necessary to identify transactions by the underlying investors. The Fund has entered into agreements with the intermediaries that service the Fund’s investors, pursuant to which the intermediaries agree to provide information on investor transactions to the Fund and to act on the Fund’s instructions to restrict transactions by investors who the Manager has identified as having violated the Fund’s policies and procedures to deter frequent trading and market timing.

Wrap programs offered by certain intermediaries may be designated ‘‘Qualified Wrap Programs’’ by the Fund based on specific criteria established by the Fund and a certification by the intermediary that the criteria have been met. A Qualified Wrap Program is a wrap program whose sponsoring intermediary: (i) certifies that it has investment discretion over $50 million or more in client assets invested in mutual funds at the time of the certification, (ii) certifies that it directs transactions in accounts participating in the wrap program(s) in concert with changes in a model portfolio; (iii) provides the Manager a description of the wrap program(s); and (iv) managed by an intermediary that agrees to provide the Manager sufficient information to identify individual accounts in the intermediary’s wrap program(s). For purposes of applying the round-trip limit, transactions initiated by clients invested in a Qualified Wrap Program will not be matched to transactions initiated by the intermediary sponsoring the Qualified Wrap Program. For example, a client’s purchase of the Fund followed within 90 days by the intermediary’s redemption of the same Fund would not be considered a round trip. However, transactions initiated by a Qualified Wrap Program client are subject to the round-trip limit and will be matched to determine if the client has exceeded the round-trip limit. In addition, the Manager will monitor transactions initiated by Qualified Wrap Program intermediaries to determine whether any intermediary has engaged in frequent trading or market timing. If the Manager determines that an intermediary has engaged in activity that is harmful to the Fund, the Manager will revoke the intermediary’s Qualified Wrap Program status. Upon termination of status as a Qualified Wrap Program, all account transactions will be matched for purposes of testing compliance with the Fund’s frequent trading and market timing policies.

The Fund reserves the right to modify the frequent trading and market timing policies and procedures and grant or eliminate waivers to such policies and procedures at any time without advance notice to shareholders. There can be no assurance that the Fund’s policies and procedures to deter frequent trading and market timing will have the intended effect or that the Manager will be able to detect frequent trading and market timing.

Distributions and Taxes

The Fund distributes most or all of its net earnings and realized gains, if any, each taxable year in the form of dividends from net investment income (“dividends ”) on an annual basis and distributions of realized net capital gains (“capital gain distributions”) and net gains from foreign currency transactions (sometimes referred to below collectively as “other distributions”) on an annual basis (and dividends and other distributions are sometimes referred to below collectively as “distributions”). Different tax treatment applies to different types of distributions (as described in the table under “Taxes”).

The Fund does not have a fixed dividend rate nor does it guarantee that it will pay any distributions in any particular period. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, but dividends on different classes of shares may be different as a result of the services and/or fees applicable to certain classes of shares.

Options for Receiving Dividends and Other Distributions

When you open your Fund account, you can specify on your application how you want to receive distributions. To change that option, you must notify the transfer agent. Unless you instruct otherwise in your  account application, distributions payable to you by the Fund  will be reinvested in additional  shares of the distributing class of that Fund. There are four payment options available:  

Distributions of Fund income are generally taxable to you regardless of the manner in which they are received or reinvested.

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If you invest directly with the Fund, any election to receive distributions payable by check will only apply to distributions totaling $10.00 or more. Any distribution by the Fund totaling less than $10.00 will be reinvested in  shares of the distributing class of that  Fund and will not be paid to you by check.

If you elect to receive a distribution by check and the U.S. Postal Service cannot deliver your check, or if your check remains uncashed for at least six months, the Fund reserves the right to reinvest the amount of your check, and to reinvest all subsequent distributions, in shares of the distributing class of that Fund at the NAV per share on the day of the reinvestment. Interest will not accrue on amounts represented by uncashed distribution or redemption checks.

Shareholders investing in the Fund through a financial intermediary should discuss their options for receiving distributions with the intermediary.

Taxes

Fund distributions are taxable to shareholders other than tax-qualified retirement plans and accounts and other tax-exempt investors. However, the portion of the Fund’s dividends derived from its investments in U.S. Government obligations, if any, is generally exempt from state and local income taxes. Fund dividends, except those that are “qualified dividend income” (as described below), are subject to federal income tax at the rates for ordinary income contained in the Internal Revenue Code. The following table outlines the typical status of transactions in taxable accounts:

To the extent distributions are attributable to net capital gain that the Fund recognizes they are subject to a 15% maximum federal income tax rate for individual and certain other non-corporate shareholders (each, an ‘‘individual’’) (20% for individuals with taxable income exceeding certain thresholds, which are indexed for inflation annually), regardless of how long the shareholder held his or her Fund shares. A portion of the dividends the Fund pays to individuals may be QDI and thus eligible for the preferential rates mentioned above , that apply to net capital gain.  QDI is the aggregate of dividends the Fund receives on shares of most domestic corporations and certain foreign corporations with respect to which the Fund satisfies certain holding period and other restrictions. To be eligible for those rates, a shareholder must meet similar restrictions with respect to his or her Fund shares.

A portion of the dividends the Fund pays may also be eligible for the dividends-received deduction allowed to corporations, subject to similar holding period and other restrictions, but the eligible portion may not exceed the aggregate dividends the Fund receives from domestic corporations only.

A shareholder may realize a taxable gain or loss when redeeming or exchanging shares. That gain or loss is treated as a short-term or long-term capital gain or loss, depending on how long the redeemed or exchanged shares were held. Any capital gain an individual shareholder recognizes on a redemption or exchange of Fund shares that have been held for more than one year will qualify for the 15% and 20% tax rates mentioned above.

A shareholder who wants to use an acceptable basis determination method with respect to Fund shares other than the average basis method (the Fund’s default method ) must elect to do so in writing, which may be electronic. The Fund, or its administrative agent, must report to the IRS and furnish to its shareholders the basis information for dispositions of Fund shares. See “Tax Information” in the SAI for a description of the rules regarding that election and the Fund’s reporting obligation.

An individual must pay a 3.8% tax on the lesser of (1) the individual’s ‘‘net investment income,’’ which generally includes distributions the Fund pays and net gains realized on the redemption or exchange of Fund shares, or (2) the excess of the individual’s ‘‘modified adjusted gross income’’ over a threshold amount ($250,000 for married persons filing jointly and $200,000 for single taxpayers). This tax is in addition to any other taxes due on that income. A similar tax applies to estates and trusts.   Shareholders should consult their own tax advisers regarding the effect, if any, this tax may have on their investment in Fund shares.

Each year, the Fund’s shareholders will receive tax information regarding Fund distributions and dispositions of Fund shares to assist them in preparing their income tax returns.

The foregoing is only a summary of some of the important federal income tax considerations that may affect Fund shareholders, who should consult their tax advisers regarding specific questions as to the effect of federal, state and local income taxes on an investment in the Fund.

Additional Information

The Fund’s Board oversees generally the operations of the Fund . The Trust enters into contractual arrangements with various parties, including among others, the Fund’s manager, sub-advisor(s), custodian, transfer agent, and accountants, who provide services to the Fund . Shareholders are not parties to any such contractual arrangements, and those contractual arrangements are not intended to create in any shareholder any right to enforce them directly against the service providers or to seek any remedy under them directly against the service providers.

This Prospectus provides information concerning the Fund that you should consider in determining whether to purchase Fund shares. Neither this Prospectus nor the SAI is intended, or should be read, to be or create an agreement or contract between the Trust or the Fund and any investor, or to create any rights in any shareholder or other person other than any rights under federal or state law that may not be waived. Nothing in this Prospectus, the SAI or the Fund’s reports to shareholders is intended to provide investment advice and should not be construed as investment advice.

Distribution and Service Plans

The Funds have adopted separate Distribution Plans for their A Class, C Class, and Advisor Class shares in accordance with Rule 12b-1 under the Investment Company Act, which allows the A Class, C Class and Advisor Class shares to pay distribution and other fees for the sale of Fund shares and for other services provided to shareholders. Each Plan also authorizes the use of any fees received by the Manager in accordance with the Management Agreement, and any

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fees received by the sub-advisors pursuant to their Investment Advisory Agreements with the Manager, to be used for the sale and distribution of Fund shares. The Plans provide that the A Class and Advisor Class shares of the Funds will pay up to 0.25% per annum of the average daily net assets attributable to the A Class, and Advisor Class, respectively, and the C Class shares of the Funds will pay up to 1.00% per annum of the average daily net assets attributable to the C Class to the Manager (or another entity approved by the Board). Because these fees are paid out of a Fund’s A Class, C Class, and Advisor Class assets on an ongoing basis, over time these fees will increase the cost of your investment and may cost you more than paying other types of sales charges. The Funds have also adopted a distribution plan under Rule 12b-1 under the Investment Company Act that applies to all share classes of the Funds (the “Fund-Level Distribution Plan”). Currently, the Board has not authorized payments under the Fund-Level Distribution Plan.  

The Funds have also adopted a shareholder services plan for their A Class, C Class, Investor Class, and Advisor Class shares for certain non-distribution shareholder services provided by financial intermediaries. The shareholder services plan authorizes annual payment of up to 0.25% of the average daily net assets attributable to the A Class shares, up to 0.25% of the average daily net assets attributable to the C Class shares, up to 0.375% of the average daily net assets attributable to the Investor Class shares, and up to 0.25% of the average daily net assets attributable to the Advisor Class shares. In addition, the Funds may reimburse the Manager for certain non-distribution shareholder services provided by financial intermediaries attributable to Y Class and R5 Class shares of the Funds.

R6 Class shares will not reimburse the Manager for certain non-distribution shareholder services provided by financial intermediaries.

Portfolio Holdings

A complete list of the Fund’s holdings is made available on the Fund’s website on a monthly basis approximately twenty days after the end of each month and remains available for six months thereafter. A list of the Fund’s ten largest holdings is made available on the Fund’s website on a quarterly basis. The ten largest holdings of the Fund  are generally posted to the website approximately fifteen days after the end of each calendar quarter and remain available until the next quarter. To access the holdings information, go to www.americanbeaconfunds.com. The Fund’s ten largest holdings may also be accessed by selecting the Fund’s fact sheet.

A description of the Fund’s policies and procedures regarding the disclosure of portfolio holdings is available in the SAI, which you may access on the Fund’s website at www.americanbeaconfunds.com or call 1-800-658-5811 to request a free copy.

Delivery of Documents

The summary prospectus , Annual Shareholder Reports and Semi-Annual Shareholder Reports (“Shareholder Reports”) are available online at www.americanbeaconfunds.com/reports. If you are interested in electronic delivery of the Fund’s summary prospectus or Shareholder Reports , please go to  www.americanbeaconfunds.com and click on ‘‘Quick Links’’ and then ‘‘Register for E-Delivery.’’  

To reduce expenses, your financial institution may mail only one copy of the summary prospectus and Shareholder Reports to those addresses shared by two or more accounts. If you wish to receive individual copies of these documents, please contact your financial institution. Delivery of individual copies will commence thirty days after receiving your request.

Financial Highlights

The financial highlights tables are intended to help you understand the Fund’s financial performance for the past five fiscal years. Certain information reflects financial results for a single Fund share. The total returns in the tables represent the rate that an investor would have earned (or lost) on an investment in the Fund (assuming reinvestment of all dividends and other distributions).

The information in the financial highlights for the fiscal years ended October 31, 2022, October 31, 2023 , October 31, 2024 and October 31, 2025 has been derived from the Funds’ financial statements audited by   [XX] , an Independent Registered Public Accounting Firm, whose report, along with the Funds’ financial statements, is included in the Funds’ annual Form N-CSR, which you may obtain upon request. The information for the fiscal year ended October 31, 2021 was audited by the Funds’ prior independent registered public accounting firm.

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