Total

(American Beacon Bahl & Gaynor Small Cap Growth Fund℠)

Investment Objective

The Fund's investment objective is long-term capital appreciation.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 39 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 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 and Waivers." Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (American Beacon Bahl & Gaynor Small Cap Growth Fund℠)	Class A		Class C	Class Y	R5 Class	Investor Class
Maximum sales charge imposed on purchases (as a percentage of offering price)	5.75%		none	none	none	none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)	0.50%	[1]	1.00%	none	none	none

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

Annual Fund Operating Expenses - (American Beacon Bahl & Gaynor Small Cap Growth Fund℠)		Class A	Class C	Class Y	R5 Class	Investor Class
Management Fees		0.88%	0.88%	0.88%	0.88%	0.88%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	none	none
Other Expenses		0.51%	0.59%	0.50%	0.45%	0.83%
Total Annual Fund Operating Expenses		1.64%	2.47%	1.38%	1.33%	1.71%
Fee Waiver and/or expense reimbursement	[1]	(0.30%)	(0.34%)	(0.30%)	(0.35%)	(0.35%)
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement	[2]	1.34%	2.13%	1.08%	0.98%	1.36%

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, except that this Example reflects the fee waiver/expense reimbursement arrangement for each share class through April 30, 2021. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	704	1,035	1,389	2,383
Class C	316	737	1,285	2,781
Class Y	110	407	727	1,631
R5 Class	100	387	695	1,571
Investor Class	138	505	895	1,990

Assuming no redemption of shares:

Expense Example, No Redemption - (American Beacon Bahl & Gaynor Small Cap Growth Fund℠)	1 Year	3 Years	5 Years	10 Years
Class C | USD ($)	216	737	1,285	2,781

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 35% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, at least 80% of the Fund's net assets (plus the amount of any borrowings for investment purposes) are invested in securities of small capitalization companies. The Fund considers a company to be a small capitalization company if it has a market capitalization, at the time of investment, within the range of the market capitalizations of the companies in the Russell 2000® Index. The capitalization range of that index is subject to change over time due to market activity or changes in the composition of the index. As of March 31, 2020, the market capitalizations of the companies in the Russell 2000 Index ranged from $5.3 million to $11.2 billion.

The Fund's investment sub-advisor, Bahl & Gaynor Inc., d/b/a Bahl & Gaynor Investment Counsel ("Bahl & Gaynor") pursues its small cap growth strategy by focusing on high-quality dividend-paying stocks. Quantitative tools are initially used for screening purposes, but Bahl & Gaynor's investment process is primarily driven by fundamental, bottom-up, company-focused processes. The investment process begins by quantitatively screening the stock universe to identify companies with perceived competitive advantages by evaluating their historical revenue growth, earnings growth, long-term debt/capital, dividend history and cash flows. Bahl & Gaynor conducts extensive fundamental research on potential portfolio companies to determine which stock(s) provide the best risk/reward opportunities for inclusion in the portfolio. Bahl & Gaynor typically will sell an investment if the company's fundamentals have changed or the company's market capitalization (stock market worth) moves outside of the small cap range.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning, the Fund may have significant positions in particular sectors. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to a sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.

The Fund's equity investments may include common stocks, depositary receipts, U.S. dollar-denominated foreign stocks traded on U.S. exchanges, and real estate investments trusts ("REITs").

The Fund may invest cash balances in other investment companies, including money market funds and may purchase and sell futures contracts, including equity index futures contracts, to gain market exposure on cash balances in anticipation of liquidity needs. The Fund may lend its securities to broker-dealers and other institutions to earn additional income.

Principal Risks

There is no assurance that the Fund will achieve its investment objective 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
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer 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. 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. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, 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. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks.

Equity Investments Risk
Equity securities are subject to investment risk and market risk. The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

• Common Stock Risk. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.

• Depositary Receipts and U.S. Dollar-Denominated Foreign Stocks Traded on U.S. Exchanges Risk. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.

• Real Estate Investment Trusts ("REITs") Risk. Investments in REITs are subject to the risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.

Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.

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 that it would not be subject to if it invested directly in the securities underlying those derivatives. 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 can be no assurance that any strategy used will succeed. 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).

Growth Companies Risk
Growth companies are expected to increase their earnings at a certain rate. When these expectations are not met, the prices of these stocks may go down, even if earnings showed an absolute increase. The Fund's investments in growth companies may be more sensitive to company earnings and more volatile than the market in general primarily because their stock prices are based heavily on future expectations. If the sub-advisor's assessment of the prospects for a company's growth is incorrect, then the price of the company's stock may fall or not approach the value that the sub-advisor has placed on it. Growth company stocks may also lack the dividend yield that can cushion stock price declines in market downturns.

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. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's departure from the European Union on January 31, 2020 and trade agreement negotiations during the transition period, the risks associated with ongoing trade negotiations with China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations. In addition, political and governmental events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Market Disruption Risk
Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, pandemics, public health crises and related geopolitical events have led, and in the future may continue to lead, to instability in world economies and markets generally. This instability has disrupted, and may continue to disrupt, U.S. and world economies and markets and adversely affect the value of your investment. Events that have led to market disruptions include the recent pandemic spread of the novel coronavirus known as COVID-19, the duration and full effects of which are still uncertain. Market disruptions have caused, and may continue to cause, broad changes in market value, negative public perceptions concerning these developments, and adverse investor sentiment or publicity. Changes in value may be temporary or may last for extended periods.

Model and Data Risk
Models and data are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data. There is no assurance that the models are complete or accurate, or representative of future market cycles, nor will they always be beneficial to the Fund if they are accurate. Additionally, programs may become outdated or experience malfunctions which may not be identified by the sub-advisor and therefore may also result in losses to the Fund. These models may negatively affect Fund performance for various other reasons, including human judgment, inaccuracy of historical data and non-quantitative factors (such as market or trading system dysfunctions, investor fear or overreaction).

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. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

• Money Market Funds. Investments in money market funds are subject to interest rate risk, credit risk, and market risk.

Quantitative Strategy Risk
The success of the Fund's investment strategy may depend in part on the effectiveness of the 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 the sub-advisor and therefore may also result in losses.

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. 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 heightened during periods of declining or illiquid markets. Additionally, 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. Heavy redemptions could hurt the Fund's performance.

Sector Risk
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. 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 borrower of the Fund's securities must provide collateral in the form of cash or cash equivalents, securities of the U.S. Government and its agencies and instrumentalities, approved bank letters of credit, or other forms of collateral that are permitted by the SEC for registered investment companies in an amount at least equal to the value of the loaned securities. For loans collateralized with cash, the Fund invests the cash in other securities.

To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities may provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the cash collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) 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, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.

Securities Selection Risk
Securities selected by the sub-advisor for the Fund may not perform to expectations. This could result in the Fund's underperformance compared to its benchmark 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 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 expected changes in interest rates, borrowing costs and earnings.

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 market index, which is the Fund's benchmark index, for the periods indicated. 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.

Calendar year total returns for Investor Class Shares. Year Ended 12/31

Highest Quarterly Return:
12.88% 1st Quarter 2019
01/01/2015 through 12/31/2019

Lowest Quarterly Return:
-18.89% 4th Quarter 2018
01/01/2015 through 12/31/2019

Average annual total returns for periods ended December 31, 2019.

Average Annual Total Returns - (American Beacon Bahl & Gaynor Small Cap Growth Fund℠)	Inception Date of Class	1 Year	5 Years	Since Inception
Investor Class	Jul. 15, 2014	24.99%	8.68%	9.28%
Investor Class | Returns After Taxes on Distributions	Jul. 15, 2014	24.88%	8.01%	8.65%
Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares	Jul. 15, 2014	14.87%	6.75%	7.27%
Class A	Jul. 15, 2014	17.75%	7.38%	8.08%
Class C	Jul. 15, 2014	22.99%	7.85%	8.44%
Class Y	Jul. 15, 2014	25.34%	8.99%	9.60%
R5 Class	Jul. 15, 2014	25.49%	9.10%	9.70%
Russell 2000 Growth Index (Reflects no deduction for fees expenses or taxes)		28.48%	9.34%	9.96%

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.

(American Beacon Bridgeway Large Cap Growth Fund℠)

Investment Objective

The Fund seeks long-term total return on capital, primarily through capital appreciation.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 39 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 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 and Waivers." Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (American Beacon Bridgeway Large Cap Growth Fund℠)	Class A		Class C	Class Y	R6 Class	R5 Class	Investor Class
Maximum sales charge imposed on purchases (as a percentage of offering price)	5.75%		none	none	none	none	none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)	0.50%	[1]	1.00%	none	none	none	none

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

Annual Fund Operating Expenses - (American Beacon Bridgeway Large Cap Growth Fund℠)		Class A	Class C	Class Y	R6 Class	R5 Class	Investor Class
Management Fees		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	none	none	none
Other Expenses	[1]	0.21%	0.21%	0.20%	0.09%	0.15%	0.45%
Total Annual Fund Operating Expenses		1.21%	1.96%	0.95%	0.84%	0.90%	1.20%
Fee Waiver and/or expense reimbursement	[2]	(0.11%)	(0.12%)	(0.08%)	(0.08%)	(0.09%)	(0.08%)
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement	[3]	1.10%	1.84%	0.87%	0.76%	0.81%	1.12%

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, except that the Example reflects the fee waiver/expense reimbursement arrangement for each share class through April 30, 2021. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - (American Beacon Bridgeway Large Cap Growth Fund℠) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	681	927	1,192	1,947
Class C	287	604	1,046	2,276
Class Y	89	295	518	1,159
R6 Class	78	260	458	1,030
R5 Class	83	278	490	1,100
Investor Class	114	373	652	1,447

Assuming no redemption of shares:

Expense Example, No Redemption - (American Beacon Bridgeway Large Cap Growth Fund℠)	1 Year	3 Years	5 Years	10 Years
Class C | USD ($)	187	604	1,046	2,276

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 77% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests in a diversified portfolio of large capitalization companies that are listed on the New York Stock Exchange, NYSE American, or Nasdaq. Under normal circumstances, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in stocks from among those in the large-cap growth category at the time of purchase. For purposes of the Fund's investments, "large-cap stocks" are stocks of companies whose market capitalization falls within the range of the Russell 1000® Index at the time of investment. The Russell 1000 Index is an unmanaged, market value weighted index, which measures performance of approximately 1,000 of the largest companies in the U.S. equity market. The Russell 1000 Index is reconstituted from time to time. The market capitalization range for the Russell 1000 Index was $75.6 million to $1.2 trillion as of March 31, 2020.

Growth stocks are those that the Fund's sub-advisor, Bridgeway Capital Management, Inc. ("Bridgeway Capital") believes have above average prospects for economic growth. Generally, these are stocks represented in the Russell 1000® Growth Index, but may also include stocks of other companies with similar "growth" characteristics whose market capitalizations are within the range of the Russell 1000 Index. The Russell 1000 Growth Index includes those Russell 1000 companies with higher price-to-book ratios and higher forecasted growth values.

The Fund's investments may include common stocks, preferred stocks, securities convertible into U.S. common stocks, real estate investment trusts ("REITs"), depositary receipts and dollar-denominated foreign stocks traded on U.S. exchanges (collectively referred to as "stocks"). The Fund also may invest in stocks of mid-capitalization companies.

Bridgeway Capital selects stocks within the large-cap growth category using a statistically driven approach. Bridgeway Capital will not necessarily sell a stock if it "migrates" outside the market capitalization range of the Russell 1000 Index after purchase. As a result, due to such "migration" or other market movements, the Fund may have less than 80% of its assets in large-cap stocks at any point in time. Based on statistically driven rules, securities are sold when the reasons for selecting the stock are no longer valid or when necessary to maintain the risk profile of the overall Fund.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Information Technology sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Information Technology sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.

While the Fund is actively managed for long-term total return, Bridgeway Capital seeks to minimize capital gain distributions as part of a tax management strategy. The successful application of this method is intended to result in a more tax-efficient fund than would otherwise be the case.

The Fund may also invest cash balances in other investment companies, including money market funds, and may purchase and sell futures contracts, including equity index futures contracts, to gain market exposure on cash balances or reduce market exposure in anticipation of liquidity needs. The Fund may lend its securities to broker-dealers and other institutions to earn additional income.

Principal Risks

There is no assurance that the Fund will achieve its investment objective 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.

Allocation Risk
The sub-advisor's judgments about, and allocations among, strategies, asset classes and market exposures may adversely affect the Fund's performance. There can be no assurance, particularly during periods of market disruption and stress, that the sub-advisor's judgements about asset allocation will be correct.

Cybersecurity and Operational Risk
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer 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. 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. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.

Equity Investments Risk
Equity securities are subject to investment risk and market risk. The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

• Common Stock Risk. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.

• Convertible Securities Risk. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates. Generally, a convertible security is subject to the market risks of stocks when the underlying stock's price is high relative to the conversion price, and is subject to the market risks of debt securities when the underlying stock's price is low relative to the conversion price.

• Depositary Receipts and U.S. Dollar-Denominated Foreign Stocks Traded on U.S. Exchanges Risk. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.

• Preferred Stock Risk. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders. In certain situations, an issuer may call or redeem its preferred stock or convert it to common stock. The market prices of preferred stocks are generally more sensitive to actual or perceived changes in the issuer's financial condition or prospects than are the prices of debt securities.

• Real Estate Investment Trusts ("REITs") Risk. Investments in REITs are subject to the risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.

Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.

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 that it would not be subject to if it invested directly in the securities underlying those derivatives. 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 can be no assurance that any strategy used will succeed. 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).

Growth Companies Risk
Growth companies are expected to increase their earnings at a certain rate. When these expectations are not met, the prices of these stocks may go down, even if earnings showed an absolute increase. The Fund's investments in growth companies may be more sensitive to company earnings and more volatile than the market in general primarily because their stock prices are based heavily on future expectations. If the sub-advisor's assessment of the prospects for a company's growth is incorrect, then the price of the company's stock may fall or not approach the value that the sub-advisor has placed on it. Growth company stocks may also lack the dividend yield that can cushion stock price declines in market downturns.

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.

Large Capitalization Companies Risk
The securities of large market capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities. Many larger capitalization companies also may be unable to attain the high growth rates of successful smaller companies, especially during periods of economic expansion.

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. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's departure from the European Union on January 31, 2020 and trade agreement negotiations during the transition period, the risks associated with ongoing trade negotiations with China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations. In addition, political and governmental events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Market Disruption Risk
Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, pandemics, public health crises and related geopolitical events have led, and in the future may continue to lead, to instability in world economies and markets generally. This instability has disrupted, and may continue to disrupt, U.S. and world economies and markets and adversely affect the value of your investment. Events that have led to market disruptions include the recent pandemic spread of the novel coronavirus known as COVID-19, the duration and full effects of which are still uncertain. Market disruptions have caused, and may continue to cause, broad changes in market value, negative public perceptions concerning these developments, and adverse investor sentiment or publicity. Changes in value may be temporary or may last for extended periods.

Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility 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 expected changes in interest rates, borrowing costs and earnings.

Model and Data Risk
Models and data are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data. There is no assurance that the models are complete or accurate, or representative of future market cycles, nor will they always be beneficial to the Fund if they are accurate. Additionally, programs may become outdated or experience malfunctions which may not be identified by the sub-advisor and therefore may also result in losses to the Fund. These models may negatively affect Fund performance for various other reasons, including human judgment, inaccuracy of historical data and non-quantitative factors (such as market or trading system dysfunctions, investor fear or overreaction).

Modeling and Programming Error Risk
The success of the sub-advisor's investment strategy depends largely on the effectiveness of its quantitative research models and investment programs. The programs may not react as expected to market events, resulting in losses for the Fund. Additionally, programs may become outdated or experience malfunctions, which may not be identified by the sub-advisor and therefore may also result in losses to the Fund. There is no assurance that the models and programs are complete or accurate, or representative of future market cycles, nor will they always be beneficial to the Fund if they are accurate. These models and programs may negatively affect Fund performance for various reasons, including human judgment, inaccuracy of historical data and non-quantitative factors (such as market or trading system dysfunctions, investor fear or over-reaction.

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. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

• Money Market Funds. Investments in money market funds are subject to interest rate risk, credit risk, and market risk.

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. 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 heightened during periods of declining or illiquid markets. Additionally, 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. Heavy redemptions could hurt the Fund's performance.

Sector Risk
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. As the Fund's portfolio changes over time, the Fund's exposure to a particular sector may become higher or lower.

• Information Technology Sector Risk. The information technology sector includes companies engaged in internet software and services, technology hardware and storage peripherals, electronic equipment and components, and semiconductors and semiconductor equipment. Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face rapid product obsolescence due to technological developments and frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Failure to introduce new products, develop and maintain a loyal customer base or achieve general market acceptance for their products could have a material adverse effect on a company's business. Companies in the information technology sector are heavily dependent on intellectual property and the loss of patent, copyright or trademark protections may adversely affect the profitability of these companies.

Securities Lending Risk
The borrower of the Fund's securities must provide collateral in the form of cash or cash equivalents, securities of the U.S. Government and its agencies and instrumentalities, approved bank letters of credit, or other forms of collateral that are permitted by the SEC for registered investment companies in an amount at least equal to the value of the loaned securities. For loans collateralized with cash, the Fund invests the cash in other securities.

To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities may provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the cash collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) 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, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.

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

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 compares to a broad-based market index, which is the Fund's benchmark index and was the benchmark index of the Fund's predecessor, for the periods indicated.

On February 5, 2016, the Fund acquired all the assets and assumed all the liabilities of the Fund's predecessor. In connection with that reorganization, the R5 Class shares of the Fund adopted the performance history and financial statements of the Fund's predecessor. In the bar chart and table below, the performance of the Fund's R5 Class shares for periods prior to February 5, 2016 is the performance of the Fund's predecessor. In the table below, the performance of the Fund's A Class, C Class, Y Class and Investor Class shares for periods prior to February 5, 2016 also represents the returns of the Fund's predecessor. In the table below, the performance for the R6 Class shares for periods prior to April 30, 2018 represents the returns achieved by the Fund's predecessor from January 1, 2010 through February 4, 2016 and the performance of the Fund's R5 Class from February 5, 2016 through April 29, 2018. In each case, the newer share classes would have had similar annual returns to the Fund's predecessor because the shares of each class represent investments in the same portfolio securities. However, the older share class had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the table has not been adjusted for differences in operating expenses between those share classes and the shares of the Fund's predecessor, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. 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.

Calendar year total returns for R5 Class Shares. Year Ended 12/31

Highest Quarterly Return:
16.53% 1st Quarter 2019
01/01/2010 through 12/31/2019

Lowest Quarterly Return:
-18.37% 4th Quarter 2018
01/01/2010 through 12/31/2019

Average annual total returns for periods ended December 31, 2019.

Average Annual Total Returns - (American Beacon Bridgeway Large Cap Growth Fund℠)	Inception Date of Class	1 Year	5 Years	10 Years
R5 Class	Oct. 31, 2003	30.18%	11.24%	13.75%
R5 Class | Returns After Taxes on Distributions	Oct. 31, 2003	27.28%	9.81%	12.94%
R5 Class | Returns After Taxes on Distributions and Sales of Fund Shares	Oct. 31, 2003	19.94%	8.67%	11.43%
Class A	Feb. 05, 2016	22.29%	9.63%	12.92%
Class C	Feb. 05, 2016	27.75%	10.28%	13.26%
Class Y	Feb. 05, 2016	30.11%	11.17%	13.71%
Investor Class	Feb. 05, 2016	29.70%	10.91%	13.58%
R6 Class	Apr. 30, 2018	30.30%	11.26%	13.76%
Russell 1000 Growth Index (Reflects no deduction for fees expenses or taxes)		36.39%	14.63%	15.22%

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 the R5 Class shares of the Fund; after-tax returns for other share classes will vary.

(American Beacon Bridgeway Large Cap Value Fund℠)

Investment Objective

The Fund seeks to provide long-term total return on capital, primarily through capital appreciation and some income.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 39 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 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 and Waivers." Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (American Beacon Bridgeway Large Cap Value Fund℠)	Class A		Class C	Class Y	R6 Class	R5 Class	Investor Class
Maximum sales charge imposed on purchases (as a percentage of offering price)	5.75%		none	none	none	none	none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)	0.50%	[1]	1.00%	none	none	none	none

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

Annual Fund Operating Expenses - (American Beacon Bridgeway Large Cap Value Fund℠)	Class A	Class C	Class Y	R6 Class	R5 Class	Investor Class
Management Fees	0.66%	0.66%	0.66%	0.66%	0.66%	0.66%
Distribution and/or Service (12b-1) Fees	0.25%	1.00%	none	none	none	none
Other Expenses	0.19%	0.15%	0.14%	0.04%	0.07%	0.42%
Total Annual Fund Operating Expenses	1.10%	1.81%	0.80%	0.70%	0.73%	1.08%

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. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - (American Beacon Bridgeway Large Cap Value Fund℠) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	681	905	1,146	1,838
Class C	284	569	980	2,127
Class Y	82	255	444	990
R6 Class	72	224	390	871
R5 Class	75	233	406	906
Investor Class	110	343	595	1,317

Assuming no redemption of shares:

Expense Example, No Redemption - (American Beacon Bridgeway Large Cap Value Fund℠)	1 Year	3 Years	5 Years	10 Years
Class C | USD ($)	184	569	980	2,127

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 44% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests in a diversified portfolio of stocks of large capitalization companies that are listed on the New York Stock Exchange, NYSE American, or Nasdaq. Under normal market conditions, at least 80% of Fund net assets (plus borrowings for investment purposes) are invested in stocks from among those in the large-cap value category at the time of purchase. For purposes of the Fund's investment portfolio, "large-cap stocks" are those whose market capitalization (stock market worth) falls within the range of the Russell 1000® Index at the time of investment. The Russell 1000® Index measures the performance of the 1,000 largest U.S. companies based on total market capitalization. As of March 31, 2020, the market capitalizations of the companies in the Russell 1000® Index ranged from $75.6 million to $1.2 trillion.

The Fund's sub-advisor, Bridgeway Capital Management, Inc. ("Bridgeway Capital"), selects stocks within the large-cap value category for the Fund using a proprietary statistically driven approach. Value stocks are those Bridgeway Capital believes are priced cheaply relative to some financial measures of worth, such as the ratio of price to earnings, price to sales, or price to cash flow. Generally, these are stocks represented in the Russell 1000® Value Index, plus large capitalization stocks with similar "value" characteristics. The Russell 1000® Value Index includes those Russell 1000® companies with lower price-to-book ratios and lower forecasted growth values. Based on statistically driven rules, securities are sold when the reasons for selecting the stock are no longer valid or when necessary to maintain the risk profile of the overall Fund.

The Fund's investments may include common stocks, preferred stocks, securities convertible into U.S. common stocks, real estate investment trusts ("REITs"), American Depositary Receipts ("ADRs") and U.S. dollar-denominated foreign stocks traded on U.S. exchanges (collectively referred to as "stocks"). The Fund also may invest in stocks of mid-capitalization companies.

The Fund may also invest cash balances in other investment companies, including money market funds, and may purchase and sell futures contracts, including equity index futures contracts, to gain market exposure on cash balances or reduce market exposure in anticipation of liquidity needs. The Fund may lend its securities to broker-dealers and other institutions to earn additional income.

Bridgeway Capital selects stocks within the large-cap growth category using a statistically driven approach. Bridgeway Capital will not necessarily sell a stock if it "migrates" outside the market capitalization range of the Russell 1000 Index after purchase. As a result, due to such "migration" or other market movements, the Fund may have less than 80% of its assets in large-cap stocks at any point in time.

While the Fund is actively managed for long-term total return, Bridgeway Capital seeks to minimize capital gains distributions as part of a tax management strategy. The successful application of this method is intended to result in a more tax-efficient fund than would otherwise be the case.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Financial sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Financial sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.

The Fund's income is derived almost exclusively from dividend-paying stocks held by the Fund. However, not all stocks held by the Fund pay dividends.

Principal Risks

There is no assurance that the Fund will achieve its investment objective 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.

Allocation Risk
The sub-advisor's judgments about, and allocations among, strategies, asset classes and market exposures may adversely affect the Fund's performance. There can be no assurance, particularly during periods of market disruption and stress, that the sub-advisor's judgements about asset allocation will be correct.

Cybersecurity and Operational Risk
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer 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. 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. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, 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. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks.

Equity Investments Risk
Equity securities are subject to investment risk and market risk. The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

• Common Stock Risk. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.

• Convertible Securities Risk. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates. Generally, a convertible security is subject to the market risks of stocks when the underlying stock's price is high relative to the conversion price, and is subject to the market risks of debt securities when the underlying stock's price is low relative to the conversion price.

• Depositary Receipts and U.S. Dollar-Denominated Foreign Stocks Traded on U.S. Exchanges Risk. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.

• Preferred Stock Risk. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders. In certain situations, an issuer may call or redeem its preferred stock or convert it to common stock. The market prices of preferred stocks are generally more sensitive to actual or perceived changes in the issuer's financial condition or prospects than are the prices of debt securities.

• Real Estate Investment Trusts ("REITs") Risk. Investments in REITs are subject to the risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.

Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.

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 that it would not be subject to if it invested directly in the securities underlying those derivatives. 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 can be no assurance that any strategy used will succeed. 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).

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.

Large Capitalization Companies Risk
The securities of large market capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities. Many larger capitalization companies also may be unable to attain the high growth rates of successful smaller companies, especially during periods of economic expansion.

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. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's departure from the European Union on January 31, 2020 and trade agreement negotiations during the transition period, the risks associated with ongoing trade negotiations with China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations. In addition, political and governmental events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Market Disruption Risk
Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, pandemics, public health crises and related geopolitical events have led, and in the future may continue to lead, to instability in world economies and markets generally. This instability has disrupted, and may continue to disrupt, U.S. and world economies and markets and adversely affect the value of your investment. Events that have led to market disruptions include the recent pandemic spread of the novel coronavirus known as COVID-19, the duration and full effects of which are still uncertain. Market disruptions have caused, and may continue to cause, broad changes in market value, negative public perceptions concerning these developments, and adverse investor sentiment or publicity. Changes in value may be temporary or may last for extended periods.

Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility 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 expected changes in interest rates, borrowing costs and earnings.

Model and Data Risk
Models and data are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data. There is no assurance that the models are complete or accurate, or representative of future market cycles, nor will they always be beneficial to the Fund if they are accurate. Additionally, programs may become outdated or experience malfunctions which may not be identified by the sub-advisor and therefore may also result in losses to the Fund. These models may negatively affect Fund performance for various other reasons, including human judgment, inaccuracy of historical data and non-quantitative factors (such as market or trading system dysfunctions, investor fear or overreaction).

Modeling and Programming Error Risk
The success of the sub-advisor's investment strategy depends largely on the effectiveness of its quantitative research models and investment programs. The programs may not react as expected to market events, resulting in losses for the Fund. Additionally, programs may become outdated or experience malfunctions, which may not be identified by the sub-advisor and therefore may also result in losses to the Fund. There is no assurance that the models and programs are complete or accurate, or representative of future market cycles, nor will they always be beneficial to the Fund if they are accurate. These models and programs may negatively affect Fund performance for various reasons, including human judgment, inaccuracy of historical data and non-quantitative factors (such as market or trading system dysfunctions, investor fear or over-reaction.

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. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

• Money Market Funds. Investments in money market funds are subject to interest rate risk, credit risk, and market risk.

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. 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 heightened during periods of declining or illiquid markets. Additionally, 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. Heavy redemptions could hurt the Fund's performance.

Sector Risk
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. As the Fund's portfolio changes over time, the Fund's exposure to a particular sector may become higher or lower.

• Financial Sector Risk. Financial services companies are subject to extensive governmental regulation, which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees they can charge, the scope of their activities, the prices they can charge and the amount of capital they must maintain. Profitability is largely dependent on the availability and cost of capital funds and can fluctuate significantly when interest rates change or due to increased competition. In addition, deterioration of the credit markets generally may cause an adverse impact in a broad range of markets, including U.S. and international credit and interbank money markets generally, thereby affecting a wide range of financial institutions and markets. Certain events in the financial sector may cause an unusually high degree of volatility in the financial markets, both domestic and foreign, and cause certain financial services companies to incur large losses. Securities of financial services companies may experience a dramatic decline in value when such companies experience substantial declines in the valuations of their assets, take action to raise capital (such as the issuance of debt or equity securities), or cease operations.

Securities Lending Risk
The borrower of the Fund's securities must provide collateral in the form of cash or cash equivalents, securities of the U.S. Government and its agencies and instrumentalities, approved bank letters of credit, or other forms of collateral that are permitted by the SEC for registered investment companies in an amount at least equal to the value of the loaned securities. For loans collateralized with cash, the Fund invests the cash in other securities.

To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities may provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the cash collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) 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, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.

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

Value Stocks Risk
Value stocks are subject to the risk that their intrinsic value may never be realized by the market or that their prices may decline. 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 market index, which is the Fund's benchmark index, for the periods indicated.

On February 3, 2012, the Fund acquired all the assets and assumed all the liabilities of the Fund's predecessor. In connection with that reorganization, the R5 Class shares of the Fund adopted the performance history and financial statements of the Class N shares of the Fund's predecessor. In the bar chart and table below, the performance of the Fund's Investor Class shares for periods prior to February 3, 2012 is the performance of the Class N shares of the Fund's predecessor. In the table below, the performance of the Fund's A Class, C Class and Y Class shares for periods prior to February 3, 2012 also represents the returns of the Class N shares of the Fund's predecessor. In the table below, the performance for the R6 Class shares for periods prior to April 28, 2017 represents the returns achieved by the Class N shares of the Fund's predecessor from January 1, 2010 through February 2, 2012 and the performance of the Fund's Investor Class from February 3, 2012 through April 27, 2017. In each case, the newer share classes would have had similar annual returns to the older share classes because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the bar chart and table has not been adjusted for differences in operating expenses between those share classes and the older share classes, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. 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.

Calendar year total returns for Investor Class Shares. Year Ended 12/31

Highest Quarterly Return:
14.36% 1st Quarter 2013
01/01/2010 through 12/31/2019

Lowest Quarterly Return:
-16.16% 4th Quarter 2018
01/01/2010 through 12/31/2019

Average annual total returns for periods ended December 31, 2019.

Average Annual Total Returns - (American Beacon Bridgeway Large Cap Value Fund℠)	Inception Date of Class	1 Year	5 Years	10 Years
Investor Class	Feb. 03, 2012	24.68%	7.27%	11.84%
Investor Class | Returns After Taxes on Distributions	Feb. 03, 2012	23.61%	6.17%	11.08%
Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares	Feb. 03, 2012	15.38%	5.57%	9.78%
Class A	Feb. 03, 2012	17.51%	5.98%	11.12%
Class C	Feb. 03, 2012	22.79%	6.45%	11.14%
Class Y	Feb. 03, 2012	25.06%	7.56%	12.07%
R5 Class	Oct. 31, 2003	25.11%	7.61%	12.12%
R6 Class	Apr. 28, 2017	25.17%	7.62%	12.13%
Russell 1000 Value Index (Reflects no deduction for fees expenses or taxes)		26.54%	8.29%	11.80%

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.

(American Beacon Stephens Mid-Cap Growth Fund℠)

Investment Objective

The Fund seeks long-term growth of capital.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 39 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 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 and Waivers." Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (American Beacon Stephens Mid-Cap Growth Fund℠)	Class A		Class C	Class Y	R6 Class	R5 Class	Investor Class
Maximum sales charge imposed on purchases (as a percentage of offering price)	5.75%		none	none	none	none	none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)	0.50%	[1]	1.00%	none	none	none	none

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

Annual Fund Operating Expenses - (American Beacon Stephens Mid-Cap Growth Fund℠)		Class A	Class C	Class Y	R6 Class	R5 Class	Investor Class
Management Fees		0.80%	0.80%	0.80%	0.80%	0.80%	0.80%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	none	none	none
Other Expenses	[1]	0.24%	0.21%	0.21%	0.12%	0.16%	0.48%
Total Annual Fund Operating Expenses		1.29%	2.01%	1.01%	0.92%	0.96%	1.28%
Fee Waiver and/or expense reimbursement	[2]	(0.08%)	(0.07%)	(0.06%)	(0.08%)	(0.07%)	(0.06%)
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement	[3]	1.21%	1.94%	0.95%	0.84%	0.89%	1.22%

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, except that the Example reflects the fee waiver/expense reimbursement arrangement for each share class through April 30, 2021. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - (American Beacon Stephens Mid-Cap Growth Fund℠) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	691	953	1,235	2,035
Class C	297	624	1,076	2,332
Class Y	97	316	552	1,231
R6 Class	86	285	501	1,124
R5 Class	91	299	524	1,172
Investor Class	124	400	697	1,540

Assuming no redemption of shares:

Expense Example, No Redemption - (American Beacon Stephens Mid-Cap Growth Fund℠)	1 Year	3 Years	5 Years	10 Years
Class C | USD ($)	197	624	1,076	2,332

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 15% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of medium capitalization companies. The Fund considers a company to be a medium capitalization company if it has a market capitalization (stock market worth), at the time of investment, between $1 billion and the market capitalization of the largest company in the Russell Midcap® Index, which was $64.6 billion as of March 31, 2020.

Most of the assets of the Fund are invested in U.S. common stocks that Stephens Investment Management Group, LLC ("SIMG") believes have clear indicators of future earnings growth, or that demonstrate other potential for growth of capital. The Fund may invest in other securities, including preferred stock, securities convertible into common stock, U.S. dollar denominated foreign stock traded on U.S. exchanges, American Depositary Receipts ("ADRs") and real estate investment trusts ("REITs"). The Fund also may invest in stocks of large-capitalization companies. In selecting companies for the Fund, SIMG employs quantitative analysis and fundamental research with a focus on earnings growth. SIMG will sell a security when appropriate and consistent with the Fund's investment objective and policies.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Information Technology sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Information Technology sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.

The Fund may also invest cash balances in other investment companies, including money market funds, and may lend its securities to broker-dealers and other institutions to earn additional income.

Principal Risks

There is no assurance that the Fund will achieve its investment objective 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
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer 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. 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. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.

Equity Investments Risk
Equity securities are subject to investment risk and market risk. The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

• Common Stock Risk. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.

• Convertible Securities Risk. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates. Generally, a convertible security is subject to the market risks of stocks when the underlying stock's price is high relative to the conversion price, and is subject to the market risks of debt securities when the underlying stock's price is low relative to the conversion price.

• Depositary Receipts and U.S. Dollar-Denominated Foreign Stocks Traded on U.S. Exchanges Risk. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.

• Preferred Stock Risk. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders. In certain situations, an issuer may call or redeem its preferred stock or convert it to common stock. The market prices of preferred stocks are generally more sensitive to actual or perceived changes in the issuer's financial condition or prospects than are the prices of debt securities.

• Real Estate Investment Trusts ("REITs") Risk. Investments in REITs are subject to the risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.

Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.

Growth Companies Risk
Growth companies are expected to increase their earnings at a certain rate. When these expectations are not met, the prices of these stocks may go down, even if earnings showed an absolute increase. The Fund's investments in growth companies may be more sensitive to company earnings and more volatile than the market in general primarily because their stock prices are based heavily on future expectations. If the sub-advisor's assessment of the prospects for a company's growth is incorrect, then the price of the company's stock may fall or not approach the value that the sub-advisor has placed on it. Growth company stocks may also lack the dividend yield that can cushion stock price declines in market downturns.

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.

Large Capitalization Companies Risk
The securities of large market capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities. Many larger capitalization companies also may be unable to attain the high growth rates of successful smaller companies, especially during periods of economic expansion.

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. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's departure from the European Union on January 31, 2020 and trade agreement negotiations during the transition period, the risks associated with ongoing trade negotiations with China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations. In addition, political and governmental events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Market Disruption Risk
Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, pandemics, public health crises and related geopolitical events have led, and in the future may continue to lead, to instability in world economies and markets generally. This instability has disrupted, and may continue to disrupt, U.S. and world economies and markets and adversely affect the value of your investment. Events that have led to market disruptions include the recent pandemic spread of the novel coronavirus known as COVID-19, the duration and full effects of which are still uncertain. Market disruptions have caused, and may continue to cause, broad changes in market value, negative public perceptions concerning these developments, and adverse investor sentiment or publicity. Changes in value may be temporary or may last for extended periods.

Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility 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 expected changes in interest rates, borrowing costs and earnings.

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. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

• Money Market Funds. Investments in money market funds are subject to interest rate risk, credit risk, and market risk.

Quantitative Strategy Risk
The success of the Fund's investment strategy may depend in part on the effectiveness of the 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 the sub-advisor and therefore may also result in losses.

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. 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 heightened during periods of declining or illiquid markets. Additionally, 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. Heavy redemptions could hurt the Fund's performance.

Sector Risk
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. As the Fund's portfolio changes over time, the Fund's exposure to a particular sector may become higher or lower.

• Information Technology Sector Risk. The market prices of information technology-related securities tend to exhibit a greater degree of market risk and sharp price fluctuations than other types of securities. These securities may fall in and out of favor with investors rapidly, which may cause sudden selling and dramatically lower market prices.

Securities Lending Risk
The borrower of the Fund's securities must provide collateral in the form of cash or cash equivalents, securities of the U.S. Government and its agencies and instrumentalities, approved bank letters of credit, or other forms of collateral that are permitted by the SEC for registered investment companies in an amount at least equal to the value of the loaned securities. For loans collateralized with cash, the Fund invests the cash in other securities.

To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities may provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the cash collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) 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, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.

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

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 market index, which is the Fund's benchmark index, for the periods indicated.

On February 24, 2012, the Fund acquired all the assets and assumed all the liabilities of the Fund's predecessor. In connection with that reorganization, the Investor Class and R5 Class shares of the Fund adopted the performance history and financial statements of the Class A and Class I shares, respectively, of the Fund's predecessor. In the bar chart and table below, the performance of the Fund's Investor Class shares for periods prior to February 24, 2012 is the performance of the Class A shares of the Fund's predecessor. In the table below, the performance shown for the R5 Class shares of the Fund for periods prior to February 24, 2012 is the performance of the Class I shares of the Fund's predecessor. The table below also shows the performance of the A Class, C Class, Y Class and R6 Class shares of the Fund. In the table below, the performance for the Fund's A Class, C Class and Y Class shares for periods prior to February 24, 2012 represents the returns achieved by the Class A shares of the Fund's predecessor. In the table below, the performance for the Fund's R6 Class shares for periods prior to December 31, 2018 represents the returns achieved by the Class I shares of the Fund's predecessor from January 1, 2010 through February 23, 2012, and the performance of the Fund's R5 Class shares from February 24, 2012 through December 30, 2018. In each case, the newer share classes would have had similar annual returns to the older share classes because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the bar chart and table has not been adjusted for differences in operating expenses between those share classes and the older share classes, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. 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.

Calendar year total returns for Investor Class Shares. Year Ended 12/31

Highest Quarterly Return:
18.20% 1st Quarter 2019
01/01/2010 through 12/31/2019

Lowest Quarterly Return:
-17.27% 4th Quarter 2018
01/01/2010 through 12/31/2019

Average annual total returns for periods ended December 31, 2019.

Average Annual Total Returns - (American Beacon Stephens Mid-Cap Growth Fund℠)	Inception Date of Class	1 Year	5 Years	10 Years
Investor Class	Feb. 01, 2006	31.28%	12.38%	13.92%
Investor Class | Returns After Taxes on Distributions	Feb. 01, 2006	30.20%	10.83%	12.84%
Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares	Feb. 01, 2006	19.30%	9.53%	11.45%
Class A	Feb. 24, 2012	23.67%	10.99%	13.20%
Class C	Feb. 24, 2012	29.31%	11.48%	13.22%
Class Y	Feb. 24, 2012	31.62%	12.63%	14.16%
R5 Class	Aug. 31, 2006	31.79%	12.77%	14.31%
R6 Class	Dec. 31, 2018	31.84%	12.77%	14.31%
Russell Midcap Growth Index (Reflects no deduction for fees expenses or taxes)		35.47%	11.60%	14.24%

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.

(American Beacon Stephens Small Cap Growth Fund℠)

Investment Objective

The Fund seeks long-term growth of capital.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 39 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 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 and Waivers." Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (American Beacon Stephens Small Cap Growth Fund℠)	Class A		Class C	Class Y	R6 Class	R5 Class	Investor Class
Maximum sales charge imposed on purchases (as a percentage of offering price)	5.75%		none	none	none	none	none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)	0.50%	[1]	1.00%	none	none	none	none

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

Annual Fund Operating Expenses - (American Beacon Stephens Small Cap Growth Fund℠)		Class A	Class C	Class Y	R6 Class	R5 Class	Investor Class
Management Fees	[1]	0.93%	0.93%	0.93%	0.93%	0.93%	0.93%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	none	none	none
Other Expenses		0.16%	0.21%	0.18%	0.45%	0.12%	0.42%
Total Annual Fund Operating Expenses		1.34%	2.14%	1.11%	1.38%	1.05%	1.35%
Fee Waiver and/or expense reimbursement	[2]	(0.06%)	(0.08%)	(0.06%)	(0.43%)	(0.06%)	(0.05%)
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement	[3]	1.28%	2.06%	1.05%	0.95%	0.99%	1.30%

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, except that the Example reflects the fee waiver/expense reimbursement arrangement for each share class through April 30, 2021. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - (American Beacon Stephens Small Cap Growth Fund℠) - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	698	970	1,261	2,090
Class C	309	662	1,142	2,466
Class Y	107	347	606	1,346
R6 Class	97	395	714	1,620
R5 Class	101	328	574	1,277
Investor Class	132	423	735	1,620

Assuming no redemption of shares:

Expense Example, No Redemption - (American Beacon Stephens Small Cap Growth Fund℠)	1 Year	3 Years	5 Years	10 Years
Class C | USD ($)	209	662	1,142	2,466

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 20% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of small capitalization companies. The Fund considers a company to be a small capitalization company if it has a market capitalization (stock market worth), at the time of investment, similar to the market capitalizations of the companies in the Russell 2000 Index. The capitalization range of that index is subject to change over time due to market activity or changes in the composition of the index. As of March 31, 2020, the market capitalizations of the companies in the Russell 2000 Index ranged from $5.3 million to $11.2 billion.

Most of the assets of the Fund are invested in U.S. common stocks the sub-advisor, Stephens Investment Management Group, LLC ("SIMG"), believes have clear indicators of future earnings growth, or that demonstrate other potential for growth of capital. The Fund may invest in other securities, including preferred stock, securities convertible into common stock, real estate investment trusts ("REITs"), American Depositary Receipts ("ADRs") and U.S. dollar denominated foreign stock traded on U.S. exchanges. In selecting companies for the Fund, SIMG employs quantitative analysis and fundamental research with a focus on earnings growth. SIMG will sell a security when appropriate and consistent with the Fund's investment objectives and policies.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Information Technology sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Information Technology sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.

The Fund may also invest cash balances in other investment companies, including money market funds, and may lend its securities to broker-dealers and other institutions to earn additional income.

Principal Risks

There is no assurance that the Fund will achieve its investment objective 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
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer 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. 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. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.

Equity Investments Risk
Equity securities are subject to investment risk and market risk. The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

• Common Stock Risk. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.

• Convertible Securities Risk. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates. Generally, a convertible security is subject to the market risks of stocks when the underlying stock's price is high relative to the conversion price, and is subject to the market risks of debt securities when the underlying stock's price is low relative to the conversion price.

• Depositary Receipts and U.S. Dollar-Denominated Foreign Stocks Traded on U.S. Exchanges Risk. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.

• Preferred Stock Risk. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders. In certain situations, an issuer may call or redeem its preferred stock or convert it to common stock. The market prices of preferred stocks are generally more sensitive to actual or perceived changes in the issuer's financial condition or prospects than are the prices of debt securities.

• Real Estate Investment Trusts ("REITs") Risk. Investments in REITs are subject to the risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.

Foreign Investing Risk Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.

Growth Companies Risk
Growth companies are expected to increase their earnings at a certain rate. When these expectations are not met, the prices of these stocks may go down, even if earnings showed an absolute increase. The Fund's investments in growth companies may be more sensitive to company earnings and more volatile than the market in general primarily because their stock prices are based heavily on future expectations. If the sub-advisor's assessment of the prospects for a company's growth is incorrect, then the price of the company's stock may fall or not approach the value that the sub-advisor has placed on it. Growth company stocks may also lack the dividend yield that can cushion stock price declines in market downturns.

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. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's departure from the European Union on January 31, 2020 and trade agreement negotiations during the transition period, the risks associated with ongoing trade negotiations with China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations. In addition, political and governmental events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Market Disruption Risk
Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, pandemics, public health crises and related geopolitical events have led, and in the future may continue to lead, to instability in world economies and markets generally. This instability has disrupted, and may continue to disrupt, U.S. and world economies and markets and adversely affect the value of your investment. Events that have led to market disruptions include the recent pandemic spread of the novel coronavirus known as COVID-19, the duration and full effects of which are still uncertain. Market disruptions have caused, and may continue to cause, broad changes in market value, negative public perceptions concerning these developments, and adverse investor sentiment or publicity. Changes in value may be temporary or may last for extended periods.

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. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

• Money Market Funds. Investments in money market funds are subject to interest rate risk, credit risk, and market risk.

Quantitative Strategy Risk
The success of the Fund's investment strategy may depend in part on the effectiveness of the 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 the sub-advisor and therefore may also result in losses.

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. 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 heightened during periods of declining or illiquid markets. Additionally, 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. Heavy redemptions could hurt the Fund's performance.

Sector Risk
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. As the Fund's portfolio changes over time, the Fund's exposure to a particular sector may become higher or lower.

• Information Technology Sector Risk. The market prices of information technology-related securities tend to exhibit a greater degree of market risk and sharp price fluctuations than other types of securities. These securities may fall in and out of favor with investors rapidly, which may cause sudden selling and dramatically lower market prices.

Securities Lending Risk
The borrower of the Fund's securities must provide collateral in the form of cash or cash equivalents, securities of the U.S. Government and its agencies and instrumentalities, approved bank letters of credit, or other forms of collateral that are permitted by the SEC for registered investment companies in an amount at least equal to the value of the loaned securities. For loans collateralized with cash, the Fund invests the cash in other securities.

To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities may provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the cash collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) 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, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.

Securities Selection Risk
Securities selected by the sub-advisor for the Fund may not perform to expectations. This could result in the Fund's underperformance compared to its benchmark 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 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 expected changes in interest rates, borrowing costs and earnings.

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 market index, which is the Fund's benchmark index, for the periods indicated.

On February 24, 2012, the Fund acquired all the assets and assumed all the liabilities of the Fund's predecessor. In connection with that reorganization, the Investor Class and R5 Class shares of the Fund adopted the performance history and financial statements of the Class A and Class I shares, respectively, of the Fund's predecessor. In the bar chart and table below, the performance of the Fund's Investor Class shares for periods prior to February 24, 2012 is the performance of the Class A shares of the Fund's predecessor. The table below also shows the performance of the A Class, C Class, Y Class, R5 Class, and R6 Class shares of the Fund. In the table below, the performance shown for the R5 Class shares of the Fund for periods prior to February 24, 2012 is the performance of the Class I shares of the Fund's predecessor. The performance shown for the Fund's Y Class, A Class and C Class shares for periods prior to February 24, 2012 represents the returns achieved by the Class A shares of the Fund's predecessor. In the table below, the performance for the Fund's R6 Class shares for periods prior to April 30, 2019 represents the returns achieved by the Class I shares of the Fund's predecessor from January 1, 2010 through February 23, 2012, and the performance of the Fund's R5 Class shares from February 24, 2012 through April 29, 2019. In each case, the newer share classes would have had similar annual returns to the older share classes because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the bar chart and table has not been adjusted for differences in operating expenses between those share classes and the older share classes, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. 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.

Calendar year total returns for Investor Class Shares. Year Ended 12/31

Highest Quarterly Return:
15.75% 4th Quarter 2010
01/01/2010 through 12/31/2019

Lowest Quarterly Return:
-21.46% 4th Quarter 2018
01/01/2010 through 12/31/2019

Average annual total returns for periods ended December 31, 2019.

Average Annual Total Returns - (American Beacon Stephens Small Cap Growth Fund℠)	Inception Date of Class	1 Year	5 Years	10 Years
Investor Class	Dec. 01, 2005	22.49%	9.39%	12.37%
Investor Class | Returns After Taxes on Distributions	Dec. 01, 2005	19.44%	6.67%	10.48%
Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares	Dec. 01, 2005	15.52%	7.05%	10.03%
Class A	Feb. 24, 2012	15.45%	8.06%	11.61%
Class C	Feb. 24, 2012	20.56%	8.49%	11.61%
Class Y	Feb. 24, 2012	22.82%	9.60%	12.55%
R5 Class	Aug. 31, 2006	22.92%	9.71%	12.68%
R6 Class	Apr. 30, 2019	22.92%	9.71%	12.68%
Russell 2000 Growth Index (Reflects no deduction for fees expenses or taxes)		28.48%	9.34%	13.01%

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.

[1] A contingent deferred sales charge (''CDSC'') of 0.50% will be charged on certain purchases of $1,000,000 or more of A Class shares that are redeemed in whole or part within 18 months of purchase.

[1] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, C Class, Y Class, R5 Class and Investor Class shares, as applicable, through April 30, 2021 to the extent that Total Annual Fund Operating Expenses exceed 1.34% for the A Class, 2.13% for the C Class, 1.08% for the Y Class, 0.98% for the R5 Class, and 1.36% for the Investor Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed or terminated only in the discretion and with the approval of a majority of the Fund's Board of Trustees ("Board"). The Manager may also, from time to time, voluntarily waive fees and/or reimburse expenses of the Fund. The Manager can be reimbursed by the Fund for any contractual or voluntary fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years from the date of the Manager's waiver/reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.

[2] The Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement for A Class shares do not correlate to the ratio of expenses to average net assets, net of reimbursements, provided in the Fund's Financial Highlights table, which reflects the Fund's expenses, including its fee waiver and/or expense reimbursement agreement in effect through April 30, 2020. The Annual Fund Operating Expenses table reflects the new fee waiver and/or expense reimbursement agreement that was approved by the Fund's Board effective through April 30, 2021, which differs from the prior agreement.

[1] A contingent deferred sales charge (''CDSC'') of 0.50% will be charged on certain purchases of $1,000,000 or more of A Class shares that are redeemed in whole or part within 18 months of purchase.

[1] During the fiscal year ended December 31, 2019, the Fund paid amounts to American Beacon Advisors, Inc. (the "Manager") that were previously waived and/or reimbursed under a contractual fee waiver/expense reimbursement agreement for the Fund's A Class and C Class shares in the amount of 0.03% for the A Class and 0.04% for the C Class. As a result of the reimbursement, the Total Annual Fund Operating Expenses of the A Class and C Class shares do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights table.

[2] The Manager has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, Y Class, R6 Class, R5 Class and Investor Class shares, as applicable, through April 30, 2021 to the extent that Total Annual Fund Operating Expenses exceed 1.10% for the A Class, 1.84% for the C Class, 0.87% for the Y Class, 0.76% for the R6 Class, 0.81% for the R5 Class and 1.12% for the Investor Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed or terminated only in the discretion and with the approval of a majority of the Fund's Board of Trustees (the "Board"). The Manager may also, from time to time, voluntarily waive fees and/or reimburse expenses of the Fund. The Manager can be reimbursed by the Fund for any contractual or voluntary fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years from the date of the Manager's waiver/reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.

[3] The Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement for A Class, C Class, Y Class and Investor Class shares do not correlate to the ratio of expenses to average net assets, net of reimbursements, provided in the Fund's Financial Highlights table, which reflects the Fund's expenses, including its fee waiver and/or expense reimbursement agreement in effect through April 30, 2020. The Annual Fund Operating Expenses table reflects the new fee waiver and/or expense reimbursement agreement that was approved by the Fund's Board effective through April 30, 2021, which differs from the prior agreement.

[1] A contingent deferred sales charge (''CDSC'') of 0.50% will be charged on certain purchases of $1,000,000 or more of A Class shares that are redeemed in whole or part within 18 months of purchase.

[1] A contingent deferred sales charge (''CDSC'') of 0.50% will be charged on certain purchases of $1,000,000 or more of A Class shares that are redeemed in whole or part within 18 months of purchase.

[1] During the fiscal year ended December 31, 2019, the Fund paid amounts to American Beacon Advisors, Inc. (the "Manager") that were previously waived and/or reimbursed under a contractual fee waiver/expense reimbursement agreement for the Fund's A Class and C Class shares in the amount of 0.02% for the A Class and 0.01% for the C Class. As a result of the reimbursement, the Total Annual Fund Operating Expenses of the A Class and C Class shares do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights table.

[2] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, C Class, Y Class, R6 Class, R5 Class and Investor Class shares, as applicable, through April 30, 2021 to the extent that Total Annual Fund Operating Expenses exceed 1.21% for the A Class, 1.94% for the C Class, 0.95% for the Y Class, 0.84% for the R6 Class, 0.89% for the R5 Class and 1.22% for the Investor Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed or terminated only in the discretion and with the approval of a majority of the Fund's Board of Trustees. The Manager may also, from time to time, voluntarily waive fees and/or reimburse expenses of the Fund. The Manager can be reimbursed by the Fund for any contractual or voluntary fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years from the date of the Manager's waiver/reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.

[3] The Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement for A Class, C Class, Y Class and Investor Class shares do not correlate to the ratio of expenses to average net assets, net of reimbursements, provided in the Fund's Financial Highlights table, which reflects the Fund's expenses, including its fee waiver and/or expense reimbursement agreement in effect through April 30, 2020. The Annual Fund Operating Expenses table reflects the new fee waiver and/or expense reimbursement agreement that was approved by the Fund's Board effective through April 30, 2021, which differs from the prior agreement.

[1] A contingent deferred sales charge (''CDSC'') of 0.50% will be charged on certain purchases of $1,000,000 or more of A Class shares that are redeemed in whole or part within 18 months of purchase.

[1] The management fee has been restated to reflect the current contractual fee rate.

[2] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, C Class, Y Class, R6 Class, R5 Class, and Investor Class shares, as applicable, through April 30, 2021 to the extent that Total Annual Fund Operating Expenses exceed 1.28% for the A Class, 2.06% for the C Class, 1.05% for the Y Class, 0.95% for the R6 Class, 0.99% for the R5 Class, and 1.30% for the Investor Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed or terminated only in the discretion and with the approval of a majority of the Fund's Board of Trustees. The Manager may also, from time to time, voluntarily waive fees and/or reimburse expenses of the Fund. The Manager can be reimbursed by the Fund for any contractual or voluntary fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years from the date of the Manager's waiver/reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.

[3] The Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement for each share class do not correlate to the ratio of expenses to average net assets, net of reimbursements, provided in the Fund's Financial Highlights table, which reflects the Fund's expenses, including its fee waiver and/or expense reimbursement agreement in effect through April 30, 2020. The Annual Fund Operating Expenses table reflects the new fee waiver and/or expense reimbursement agreement that was approved by the Fund's Board effective through April 30, 2021, which differs from the prior agreement.