
American Beacon GLG Total Return Fund

SUMMARY PROSPECTUS May 29, 2020

Before you invest, you may want to review the Fund’s prospectus and statement of additional information, which contain more information about the Fund and its risks. The current prospectus and statement of additional information dated May 31, 2020, are incorporated by reference into this summary prospectus. You can find the Fund’s prospectus, statement of additional information, reports to shareholders, and other information about the Fund online at
www.americanbeaconfunds.com/resource_center/MutualFundForms.aspx. You can also get this information at no cost by calling 800-658-5811 or by sending an email request to americanbeaconfunds@ambeacon.com.

*	Formerly known as the Institutional Class.

Investment Objective

The Fund’s investment objective is to seek high current income and 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 22 of the Prospectus and “Additional Purchase and Sale Information for A Class Shares” on page 40 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)


Share Class	A	C	Y	R5	Investor	Ultra
Maximum sales charge imposed on purchases (as a percentage of offering price)	4.75 %	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)
Share Class	A	C	Y	R5	Investor	Ultra
Management Fees	0.95 %	0.95 %	0.95 %	0.95 %	0.95 %	0.95 %
Distribution and/or Service (12b-1) Fees	0.25 %	1.00 %	0.00 %	0.00 %	0.00 %	0.00 %
Other Expenses	0.28 %	0.28 %	0.31 %	0.16 %	1.34 %	0.21 %
Total Annual Fund Operating Expenses²	1.48 %	2.23 %	1.26 %	1.11 %	2.29 %	1.16 %
Fee Waiver and/or expense reimbursement³	(0.24 %)	(0.23 %)	(0.16 %)	(0.13 %)	(0.83 %)	(0.17 %)
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement	1.24 %	2.00 %	1.10 %	0.98 %	1.46 %	0.99 %

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.

During the fiscal year ended January 31, 2020, 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 0.11% for the A Class and 0.11% for the C Class. As a result of the reimbursement, the Total Annual Fund Operating Expenses of each class shares do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights table.

The Manager has contractually agreed to waive fees and/or reimburse expenses of the Fund’s A Class, C Class, Y Class, R5 Class, Investor Class, and Ultra Class shares, as applicable, through May 31, 2021 to the extent that Total Annual Fund Operating Expenses exceed 1.21% for the A Class, 1.97% for the C Class, 1.06% for the Y Class, 0.95% for the R5 Class, 1.43% for the Investor Class, and 0.95% for the Ultra 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 will itself waive fees and/or reimburse expenses of the Fund to maintain the contractual expense ratio caps for each class of shares. 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.

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 May 31, 2021. Although your actual costs may be higher or lower, based on these assumptions, your

GLG05292020

American Beacon GLG Total Return Fund - Summary Prospectus1

costs would be:

2American Beacon GLG Total Return Fund - Summary Prospectus


Share Class	1 Year	3 Years	5 Years	10 Years
A	$ 596	$ 899	$ 1,223	$ 2,140
C	$ 303	$ 676	$ 1,174	$ 2,547
Y	$ 112	$ 384	$ 676	$ 1,509
R5	$ 100	$ 340	$ 599	$ 1,340
Investor	$ 149	$ 636	$ 1,150	$ 2,562
Ultra	$ 101	$ 351	$ 622	$ 1,394

Assuming no redemption of shares:


Share Class	1 Year	3 Years	5 Years	10 Years
C	$ 203	$ 676	$ 1,174	$ 2,547

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 19% of the average value of its portfolio.

Principal Investment Strategies

The Fund seeks to achieve high current income and capital appreciation by investing primarily in securities (excluding U.S. Dollar denominated cash and cash equivalents) of issuers that are economically tied to emerging market countries. The Fund’s strategy is managed in an absolute-return style and is not managed with reference to a benchmark. The Fund may, for example, achieve its objective when stronger macroeconomic and political circumstances in emerging market countries lead to lower interest rates, lower credit spreads, or stronger currencies.

The securities in which the Fund primarily invests include debentures, sovereign and quasi-sovereign debt, corporate obligations, high-yield securities (commonly referred to as “junk bonds”), unrated securities, and, to a lesser extent, equities, equity equivalents and exchange-traded funds (“ETFs”) that provide exposure to these types of investments. The Fund may also invest in investment-grade securities, callable securities, restricted securities, variable and floating-rate securities, separate trading of registered interest and principal of securities (“STRIPS”) and zero-coupon securities. The Fund’s investments may include fixed-income securities of various maturities and durations.

The Fund may invest in derivatives, including futures (such as interest-rate futures), forwards (such as currency and non-deliverable forwards (“NDFs”)), options (such as interest-rate options) and swaps (such as interest-rate, total-return, cross-currency and credit-default swaps). The Fund may engage in short sales (primarily by taking short positions with derivatives). The Fund may use derivative instruments to enhance total return, manage certain investment risks, serve as a substitute for the purchase or sale of the underlying security or currency, or to seek tax-advantaged access to the underlying instruments. Derivatives allow the Fund to obtain economic exposure without directly holding the underlying security in the event that regulatory, transaction cost, or other factors increase the difficultly or reduce the desirability of holding the underlying security.

The Fund may make direct investments in non-U.S. currencies and in securities denominated in non-U.S. currencies, and the Fund may invest in derivative instruments tied to non-U.S. currencies (including indexes or baskets of such currencies). These investments are intended to enhance the Fund’s returns or to reduce its risk.

Derivatives are generally treated as economically tied to emerging market countries if the underlying assets are, or if the performance of the instrument is otherwise determined with reference to, interest rates of emerging market countries or securities issued by governments or other issuers organized under the laws of emerging market countries.

A significant portion of the portfolio may be retained in cash and cash equivalents at times when the sub-advisor determines that suitable investment opportunities are not available and, as necessary, to provide asset coverage for the Fund’s derivative investments. Cash instruments typically may include liquid government debt instruments and money market mutual fund investments, but they also may include time deposits, certificates of deposit, commercial paper and other money market instruments.

For purposes of the Fund’s investment strategy, an “emerging markets” country is any country:

(i) having an “emerging stock market” as defined by the International Finance Corporation;
(ii) with low- to middle-income economies according to the International Bank for Reconstruction and Development (the “World Bank”);
(iii) listed in World Bank publications as developing; or
(iv) determined by the sub-advisor to be an emerging market.

Currently, these countries generally include every country in the world except Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Singapore, Spain, Sweden, Switzerland, the United Kingdom and the United States.

An instrument is economically tied to an emerging market country if:

(i) the issuer is the government (or any political subdivision, agency, authority or instrumentality of such government) of an emerging market country;
(ii) the instrument is principally traded on an emerging market country’s securities markets; or
(iii) the issuer is organized or principally operates in an emerging market country, derives 50% or more of its income from its operation within the country, or has 50% or more of its assets in the country.

In making investment decisions for the Fund, the sub-advisor employs an investment process in which country issuers, currencies, and interest-rate curves are analyzed based on information obtained from dedicated in-house market research, local resources, travel to the region, and a variety of other sources, including third-party data providers. The analysis intends to capture most of the upside of an investment and reduce the potential for downside exposure relative to traditional investment strategies. The Fund generally will engage in active and frequent trading of portfolio securities to achieve its investment objective.

The Fund is non-diversified, which means that it may invest a high percentage of its assets in a limited number of issuers.

American Beacon GLG Total Return Fund - Summary Prospectus3

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.

Absolute Return Strategy Risk
The Fund uses a variety of investment strategies intended to achieve a positive total return. The sub-advisor does not attempt to keep the portfolio structure or the Fund’s performance consistent with any designated stock, bond or market index, and during times of market rallies, the Fund may not perform as well as other funds that seek to outperform an index.

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. This risk may be increased by the use of derivatives to increase allocations to various market exposures.

Callable Securities Risk
The Fund may invest in fixed-income securities with call features. A call feature allows the issuer of the security to redeem or call the security prior to its stated maturity date. In periods of falling interest rates, issuers may be more likely to call in securities that are paying higher coupon rates than prevailing interest rates. In the event of a call, the Fund would lose the income that would have been earned to maturity on that security, and the proceeds received by the Fund may be invested in securities paying lower coupon rates and may not benefit from any increase in value that might otherwise result from declining interest rates.

Counterparty Risk
The Fund is subject to the risk that a party or participant to a transaction, such as a broker or derivative counterparty, will be unwilling or unable to satisfy its obligation to make timely principal, interest or settlement payments or to otherwise honor its obligations to the Fund.

Credit Risk
The Fund is subject to the risk that the issuer or guarantor of a debt security, or the counterparty to a derivatives contract, may fail, or become less able, to make timely payment of interest or principal or otherwise honor its obligations or default completely. Changes in the actual or perceived creditworthiness of an issuer, or a downgrade or default affecting any of the Fund’s securities, could affect the Fund’s performance.

Currency Risk
The Fund may have exposure to foreign currencies by using various instruments described below. Foreign currencies may fluctuate significantly over short periods of time, may be affected unpredictably by intervention, or the failure to intervene, of the U.S. or foreign governments or central banks, and may be affected by currency controls or political developments in the U.S. or abroad. Foreign currencies may also decline in value relative to the U.S. dollar and other currencies and thereby affect the Fund’s investments in non-U.S. currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, non-U.S. currencies. The Fund may gain exposure to foreign currencies because of its investments in one or more of the following:

■	Non-U.S. currencies

■	Securities denominated in non-U.S. currencies

■	Foreign currency forward contracts, including non-deliverable forwards (“NDFs”), which are described below under “Derivatives Risk”

■	Non-U.S. currency futures contracts, which are described below under “Derivatives Risk”

■	Options on non-U.S. currencies and non-U.S. currency futures, which are described below under “Derivatives Risk”

■	Swaps for cross-currency transactions, which are described below under “Derivatives Risk”

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, shareholder data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. 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.

Derivatives Risk
Derivatives may involve significant risk. The use of derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities or other instruments underlying those derivatives, including the high degree of leverage often embedded in such instruments, and potential material and prolonged deviations between the theoretical value and realizable value of a derivative. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund’s initial investment. Derivatives may at times be illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Certain derivatives may be difficult to value, and valuation may be more difficult in times of market turmoil. Derivatives may also be more volatile than other types of investments. The Fund may buy or sell derivatives not traded on an exchange, which may be subject to heightened liquidity and valuation risk. Derivative investments can increase portfolio turnover and transaction costs. Derivatives also are subject to counterparty risk and credit risk. As a result, the Fund may not recover its investment or may only obtain a limited recovery, and any recovery may be delayed. Not all derivative transactions require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. Ongoing changes to the regulation of the derivatives markets and potential changes in the regulation of funds using derivative instruments could limit the Fund’s ability to pursue its investment strategies. New regulation of derivatives may make them more costly, or may otherwise adversely affect their liquidity, value or performance. In addition, the Fund’s investments in derivatives are subject to the following risks:

■

Futures and Forward Contracts Risk. Futures and forward contracts, including NDFs, 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 or to buy or sell a specific currency at a future date at a price set at the time of the contract. 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 are no limitations on daily price movements of forward contracts. There can be no assurance that any strategy used will succeed. Not all forward contracts, including NDFs, require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. There can be no assurance that, at all times, a liquid market will exist for offsetting a futures contract that the Fund has previously bought or sold and this may result in the inability to close a futures contract when desired. Forward currency transactions, including NDFs, and forward

4American Beacon GLG Total Return Fund - Summary Prospectus

currency contracts include the risks associated with fluctuations in currency.Interest rate futures contracts expose the Fund to price fluctuations resulting from changes in interest rates. The Fund could suffer a loss if interest rates rise after the Fund has purchased an interest rate futures contract or fall after the Fund has sold an interest rate futures contract.

■

Options Risk. In order for a call option to be profitable, the market price of the underlying security or index must rise sufficiently above the call option exercise price to cover the premium and any transaction costs. These costs will reduce any profit that might otherwise have been realized had the Fund bought the underlying security instead of the call option. For a put option to be profitable, the market price of the underlying security or index must decline sufficiently below the put option’s exercise price to cover the premium and any transaction costs. By using put options in this manner, the Fund will reduce any profit it might otherwise have realized from having shorted the declining underlying security by the premium paid for the put option and by transaction costs. If an option that the Fund has purchased expires unexercised, the Fund will experience a loss in the amount of the premium it paid. If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price. If the Fund sells a call option on an underlying asset that the Fund owns, and the underlying asset has increased in value when the call option is exercised, the Fund will be required to sell the underlying asset at the call price and will not be able to realize any of the underlying asset’s value above the call price. If a call option that the Fund has sold is unexercised, the Fund will experience a gain or loss from the sale of the underlying instrument. If a call option that the Fund has sold is unexercised, the Fund will experience a gain or loss from the sale of the underlying instrument. There can be no guarantee that the use of options will increase the Fund’s return or income. In addition, there may be an imperfect correlation between the movement in prices of options and the securities underlying them, and there may at times not be a liquid secondary market for options.

■

Swap Agreements Risk. Swaps can involve greater risks than a direct investment in an underlying asset, because swaps typically include a certain amount of embedded leverage and as such are subject to leverage risk. If swaps are used as a hedging strategy, the Fund is subject to the risk that the hedging strategy may not eliminate the risk that it is intended to offset, due to, among other reasons, the occurrence of unexpected price movements or the non-occurrence of expected price movements. Swaps also may be difficult to value. Swaps may be subject to liquidity risk and counterparty risk, and swaps that are traded over-the-counter are not subject to standardized clearing requirements and may involve greater liquidity and counterparty risks. In addition, the Fund may invest in the following types of swaps:

Credit default swaps, which may be subject to credit risk and the risks associated with the purchase and sale of credit protection.

Cross-currency swaps, which may be subject to currency risk and credit risk.

Interest rate swaps, which may be subject to interest rate risk and credit risk.

Total return swaps, which may be subject to credit risk and, if the underlying securities are bonds or other debt obligations, market risk and interest rate risk.

Emerging Markets Risk
When investing in emerging markets, the risks of investing in foreign securities, as discussed below, are heightened. Emerging markets are generally smaller, less developed, less liquid and more volatile than the securities markets of the U.S. and other developed markets. There are also risks of: greater political uncertainties; an economy’s dependence on revenues from particular commodities or on international aid or development assistance; currency transfer restrictions; a limited number of potential buyers for such securities resulting in increased volatility and limited liquidity for emerging market securities; trading suspensions; and delays and disruptions in securities settlement procedures. The governments of emerging market countries may also be more unstable and more likely to impose capital controls, nationalize a company or industry, place restrictions on foreign ownership and on withdrawing sale proceeds of securities from the country, intervene in the financial markets, and/or impose burdensome taxes that could adversely affect security prices. In addition, there may be less publicly available information about issuers in emerging markets than would be available about issuers in more developed capital markets, and such issuers may not be subject to accounting, auditing and financial reporting standards and requirements comparable to those to which U.S. companies are subject.

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.

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.

Hedging Risk
If the Fund uses a hedging instrument at the wrong time or judges the market conditions incorrectly, or the hedged instrument does not correlate to the risk sought to be hedged, the hedge might be unsuccessful, reduce the Fund’s return, or create a loss. In addition, hedges, even when successful in mitigating risk, may not prevent the Fund from experiencing losses on its investments. Hedging instruments may also reduce or eliminate gains that may otherwise have been available had the Fund not used the hedging instruments.

High Portfolio Turnover Risk
Portfolio turnover is a measure of the Fund’s trading activity over a one-year period. A portfolio turnover rate of 100% would indicate that the Fund sold and replaced the entire value of its securities holdings during the period. The Fund may engage in active and frequent trading and may have a high portfolio turnover rate, which could increase the Fund’s transaction costs, have a negative impact on performance, and generate higher capital gain distributions to shareholders than if the Fund had a lower portfolio turnover rate.

High Yield Securities Risk
Exposure to high yield, below investment-grade securities (commonly referred to as “junk bonds”) generally involves significantly greater risks than an investment in investment grade securities. High yield debt securities may fluctuate more widely in price and yield and may fall in price when the economy is weak or expected to become weak. These securities also may be difficult to sell at the time and price the Fund desires. High yield securities are considered to be speculative with respect to an issuer’s ability to pay interest and principal and carry a greater risk that the issuers of lower-rated securities will default on the timely payment of principal and interest. High yield securities may experience greater price volatility and less liquidity than investment grade securities. Issuers of securities that are in default or have defaulted may fail to resume principal or interest payments, in which case the Fund may lose its entire investment.

Illiquid and Restricted Securities Risk
Securities not registered in the U.S. under the Securities Act of 1933, as amended (the “Securities Act”) or in non-U.S. markets pursuant to similar regulations, including Rule 144A securities, are restricted as to their resale. Such securities may not be listed on an exchange and may have no active trading market. The prices of these securities may be more difficult to determine than publicly traded securities and these securities may involve heightened risk as compared to investments in securities of publicly traded companies. They may be more difficult to purchase or sell at an advantageous time or price because such securities

American Beacon GLG Total Return Fund - Summary Prospectus5

may not be readily marketable in broad public markets, or may have to be held for a certain time period before they can be resold. The Fund may not be able to sell a restricted security when the sub-advisor considers it desirable to do so and/or may have to sell the security at a lower price than the Fund believes is its fair market value. In addition, transaction costs may be higher for restricted securities and the Fund may receive only limited information regarding the issuer of a restricted security. The Fund may have to bear the expense of registering restricted securities for resale and the risk of substantial delays in effecting the registration.

Interest Rate Risk

Generally, the value of investments with interest rate risk, such as fixed income securities or derivatives, will move in the opposite direction to movements in interest rates. As of the date of this Prospectus, interest rates are historically low. In the future, interest rates may rise, perhaps significantly and/or rapidly, potentially resulting in substantial losses to the Fund. The prices of fixed income securities or derivatives are also affected by their durations. Fixed income securities or derivatives with longer durations generally have greater sensitivity to changes in interest rates. For example, if a bond has a duration of five years, a 1% increase in interest rates could be expected to result in a 5% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well. Some investors buy securities and derivatives with borrowed money; an increase in interest rates can cause a decline in those markets. Conversely, extremely low or negative interest rates may become more prevalent among U.S. and foreign issuers. To the extent the Fund holds an investment with a negative interest rate to maturity, the Fund would generate a negative return on that investment.

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.

Leverage Risk
The Fund’s use of derivative instruments and selling securities short will have the economic effect of financial leverage. Financial leverage magnifies the exposure to the swings in prices of an asset or class of assets underlying a derivative instrument and may result in increased volatility, which means that the Fund will have the potential for greater losses than if the Fund does not use the derivative instruments that have a leveraging effect. Leverage may result in losses that exceed the amount originally invested and may accelerate the rate of losses. Leverage tends to magnify, sometimes significantly, the effect of any increase or decrease in the Fund’s exposure to an asset or class of assets and may cause the Fund’s net asset value (“NAV”) per share to be volatile. There can be no assurance that the Fund’s use of leverage will be successful.

LIBOR Risk
Certain of the instruments identified in the Fund’s principal investment strategies have variable or floating coupon rates that are based on the ICE LIBOR (“LIBOR”), Euro Interbank Offered Rate and other similar types of reference rates (each, a “Reference Rate”). On July 27, 2017, the Chief Executive of the UK Financial Conduct Authority (“FCA”), which regulates LIBOR, announced that the FCA will no longer persuade nor require banks to submit rates for the calculation of LIBOR and certain other Reference Rates after 2021. Such announcement indicates that the continuation of LIBOR and other Reference Rates on the current basis cannot and will not be guaranteed after 2021. This announcement and any additional regulatory or market changes may have an adverse impact on the Fund or its investments, including increased volatility or illiquidity in markets for instruments that rely on LIBOR.

In advance of 2021, regulators and market participants are working together to identify or develop successor Reference Rates. Additionally, prior to 2021, it is expected that market participants will focus on the transition mechanisms by which the Reference Rates in existing contracts or instruments may be amended, whether through marketwide protocols, fallback contractual provisions, bespoke negotiations or amendments or otherwise. Nonetheless, the termination of certain Reference Rates presents risks to the Fund. At this time, it is not possible to completely identify or predict the effect of any such changes, any establishment of alternative Reference Rates or any other reforms to Reference Rates that may be enacted in the UK or elsewhere. The elimination of a Reference Rate or any other changes or reforms to the determination or supervision of Reference Rates could have an adverse impact on the market for or value of any securities or payments linked to those Reference Rates and other financial obligations held by the Fund or on its overall financial condition or results of operations. In addition, any substitute Reference Rate and any pricing adjustments imposed by a regulator or by counterparties or otherwise may adversely affect the Fund’s performance and/or NAV.

Liquidity Risk
The Fund is susceptible to the risk that certain investments held by the Fund may have limited marketability, be subject to restrictions on sale, be difficult or impossible to purchase or sell at favorable times or prices, or become less liquid in response to market developments or adverse credit events that may affect issuers or guarantors of a security. An inability to sell a portfolio position can adversely affect the Fund’s value or prevent the Fund from being able to take advantage of other investment opportunities. Market prices for such instruments may be volatile. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund. The Fund may be required to dispose of investments at unfavorable times or prices to satisfy obligations, which may result in losses or may be costly to the Fund. For example, liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Unexpected redemptions may force the Fund to sell certain investments at unfavorable prices to meet redemption requests or other cash needs. Judgment plays a greater role in pricing illiquid investments than in investments with more active markets.

Market Risk
In recent periods, certain fixed income instruments have experienced unusual liquidity issues, increased price volatility and, in some cases, credit downgrades and increased likelihood of default. These events have reduced the willingness and ability of some lenders to extend credit, and have made it more difficult for some borrowers to obtain financing on attractive terms, if at all. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers in a different country or region. 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. High public debt in the U.S. and other countries creates ongoing systemic and market risks and policymaking uncertainty. Because the impact on the markets has been widespread, it may be difficult to identify both risks and opportunities using past models of the interplay of market forces, or to predict the duration of these market conditions. Interest rates have been unusually low in recent years in the U.S. and abroad. Because there is little precedent for this situation, it is difficult to predict the impact on various markets of a significant rate increase, whether brought about by U.S. policy makers or by dislocations in world markets. In addition, there is a risk that the prices of goods and services in the U.S. and many foreign economies may decline over time, known as deflation (the opposite of inflation). Deflation may have an adverse effect on stock prices and creditworthiness and may make defaults on debt more likely.

6American Beacon GLG Total Return Fund - Summary Prospectus

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.

Market Timing Risk
The Fund is subject to the risk of market timing activities by investors due to the Fund’s investments in high yield and foreign securities, or its exposure to foreign securities through the derivatives it holds. If the Fund trades foreign securities, it generally prices these foreign securities using their closing prices from the foreign markets in which they trade, which typically is prior to the Fund’s calculation of its net asset value (“NAV”). These prices may be affected by events that occur after the close of a foreign market but before the Fund prices its shares. In such instances, the Fund may fair value high yield and foreign securities. However, some investors may engage in frequent short-term trading in the Fund to take advantage of any price differentials that may be reflected in the NAV of the Fund’s shares. Frequent trading by Fund shareholders poses risks to other shareholders in the Fund, including (i) the dilution of the Fund’s NAV, (ii) an increase in the Fund’s expenses, and (iii) interference with the portfolio manager’s ability to execute efficient investment strategies. While the Manager monitors trading in the Fund, there is no guarantee that it can detect all market timing activities.

Model Risk
The sub-advisor may use proprietary modeling systems to implement its investment strategies for the Fund. Investments selected using these models may perform differently than expected as a result of the factors used in the models, the weight placed on each factor, changes from the factors’ historical trends and technical issues in the construction and implementation of the models. There is no assurance that the models are complete or accurate, or representative of future market cycles, nor will they necessarily always be beneficial to the Fund if they are accurate. These models 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).

Non-Diversification Risk
The Fund is non-diversified, which means it may focus its investments in the securities of a comparatively small number of issuers. Investments in securities of a limited number of issuers exposes the Fund to greater market risk, price volatility and potential losses than if assets were diversified among the securities of a greater number of issuers.

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:

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ETFs. To the extent the Fund invests in exchange-traded funds (“ETFs”) that invest in equity securities, fixed income securities and/or foreign securities, or track an index, the Fund is subject to the risks associated with the underlying investments held by the ETF or the index fluctuations to which the ETF is subject. Because ETFs are listed on an exchange, they may be subject to trading halts, may trade at a premium or discount to their net asset value (“NAV”) and may not be liquid. An ETF that tracks an index may not precisely replicate the returns of its benchmark index.

■	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. A rise in interest rates or other market developments may cause investors to move out of fixed income securities on a large scale. Heavy redemptions could hurt the Fund’s performance.

Securities Selection Risk
Securities selected by the sub-advisor for the Fund may not perform to expectations. It may not be possible to predict or to hedge against a widening in the yield spread of the securities selected by the sub-advisor. This could result in the Fund’s underperformance compared to its benchmark index(es), or other funds with similar investment objectives or strategies.

Segregated Assets Risk
In connection with certain transactions that may give rise to future payment obligations, the Fund may be required to maintain a segregated amount of, or otherwise earmark, cash or liquid securities to cover the obligation. Segregated assets generally cannot be sold while the position they are covering is outstanding, unless they are replaced with other assets of equal value. The need to segregate cash or other liquid securities could limit the Fund’s ability to pursue other opportunities as they arise.

Short Position Risk
The Fund will incur a loss as a result of a short position if the price of the instrument sold short increases in value between the date of the short sale and the date on which an offsetting position is purchased. Short positions may be considered speculative transactions and involve special risks, including greater reliance on the sub-advisor’s ability to accurately anticipate the future value of a security or instrument. The Fund’s losses are potentially unlimited in a short position transaction because there is potentially no limit on the amount that the security that the Fund is required to purchase may have appreciated. Because the Fund may invest the proceeds of a short sale, another effect of short selling on the Fund is similar to the effect of leverage, in that short selling may amplify changes in the Fund’s NAV since it may increase the exposure of the Fund to certain markets and may increase losses and the volatility of returns.

Sovereign and Quasi-Sovereign Debt Risk
Sovereign and quasi-sovereign debt securities are both subject to risk of payment delays or defaults due to, among other things: (1) country cash flow problems, (2) insufficient foreign currency reserves, (3) political considerations, (4) large debt positions relative to the country’s economy, (5) policies toward foreign lenders or investors, (6) the failure to implement economic reforms required by the International Monetary Fund or other multilateral agencies, or (7) an inability or unwillingness to repay debts. It may be particularly difficult to enforce the rights of debt holders in emerging markets. A governmental entity that defaults on an obligation may request additional time in which to repay loans, may request further loans, or may seek to restructure its obligations to reduce interest rates or outstanding principal. There is no legal process for collecting sovereign and quasi-sovereign debt that a government does not pay, nor are there bankruptcy proceedings through which all or part of the sovereign debt that a governmental entity has not repaid may be collected. Sovereign and quasi-sovereign debt risk is increased for emerging markets issuers, which are among the largest debtors to commercial banks and foreign governments. At times, certain emerging market countries have declared moratoria on the payment of principal and interest on external debt. Certain emerging market countries have experienced difficulty in servicing their sovereign debt on a timely basis, which has led to defaults and the restructuring of certain indebtedness.

American Beacon GLG Total Return Fund - Summary Prospectus7

STRIPS and Zero Coupon Securities Risk
Separately traded registered interest and principal securities (“STRIPS”) and zero coupon securities are securities that do not make periodic interest payments. Accordingly, these securities usually trade at a deep discount from their face or par value and will be subject to greater fluctuations in market value in response to changing interest rates than debt obligations of comparable maturities that make current distribution of interest in cash.

Unrated Securities Risk
Because the Fund may purchase securities that are not rated by any rating organization, the sub-advisor, after assessing their credit quality, may internally assign ratings to certain of those securities in categories similar to those of rating organizations. Unrated securities are subject to the risk that the sub-advisor may not accurately evaluate the security’s comparative credit rating. Some unrated securities may not have an active trading market or may be difficult to value, which means the Fund might have difficulty selling them promptly at an acceptable price. Unrated securities may be subject to greater liquidity risk and price volatility.

U.S. Government Securities and Government-Sponsored Enterprises Risk
A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. The market prices for such securities are not guaranteed and will fluctuate. Securities held by the Fund that are issued by government-sponsored enterprises, such as the Federal National Mortgage Association (‘‘Fannie Mae’’), Federal Home Loan Mortgage Corporation (‘‘Freddie Mac’’), Federal Home Loan Bank (‘‘FHLB’’), Federal Farm Credit Bank (“FFCB”), and the Tennessee Valley Authority, are not guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. Government, and no assurance can be given that the U.S. Government will provide financial support if these organizations do not have the funds to meet future payment obligations. U.S. Government securities and securities of government-sponsored entities are also subject to credit risk, interest rate risk and market risk.

Valuation Risk
The Fund may value certain assets at a price different from the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid, or securities that trade in relatively thin markets and/or markets that experience extreme volatility. The Fund’s ability to value its investments in an accurate and timely manner may be impacted by technological issues and/or errors by third party service providers, such as pricing services or accounting agents.

Variable and Floating Rate Securities Risk
The coupons on variable and floating-rate securities are not fixed and may fluctuate based upon changes in market rates. The coupon on a floating rate security is generally based on an interest rate, such as a money-market index, LIBOR or a Treasury bill rate. Variable and floating rate securities are subject to interest rate risk and credit risk. As short-term interest rates decline, the coupons on floating-rate securities typically decrease. Alternatively, during periods of rising interest rates, the coupons on floating-rate securities typically increase. Changes in the coupons of floating-rate securities may lag behind changes in market rates or may have limits on the maximum increases in the coupon rates. The value of floating-rate securities may decline if their coupons do not rise as much, or as quickly, as interest rates in general. Floating rate securities will not generally increase in value if interest rates decline. Certain types of floating rate instruments may be subject to greater liquidity risk than other debt securities.

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 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: 3.36% 2nd Quarter 2018 1/01/2017 through 12/31/2019 Lowest Quarterly Return: -1.67% 3rd Quarter 2018 1/01/2017 through 12/31/2019
The calendar year-to-date total return as of March 31, 2020 was 9.43%.

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


	Inception Date	1 Year	Since Inception
Investor Class	05/20/2016
Returns Before Taxes		-3.52 %	1.24 %
Returns After Taxes on Distributions		-3.52 %	0.56 %
Returns After Taxes on Distributions and Sales of Fund Shares		-2.09 %	0.66 %

8American Beacon GLG Total Return Fund - Summary Prospectus


	Inception Date	1 Year	Since Inception
Share Class (Before Taxes)
A	05/20/2016	-8.12 %	-0.14 %
C	05/20/2016	-5.27 %	0.47 %
Y	05/20/2016	-3.21 %	1.52 %
R5	05/20/2016	-3.09 %	1.70 %
Ultra	05/20/2016	-3.00 %	1.72 %


	1 Year	Since Inception
Index (Reflects no deduction for fees, expenses or taxes)
ICE BofA Merrill Lynch 3 Month LIBOR Constant Maturity Index	2.60 %	1.71 %

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

Management

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

Sub-Advisor
The Fund’s investment sub-advisor is GLG LLC.

Portfolio Managers


GLG LLC	Guillermo Ossés Head of Emerging Markets Debt Strategies Since Fund Inception (2016)	Phil Yuhn Portfolio Manager Since Fund Inception (2016)

Purchase and Sale of Fund Shares

The Fund is currently expected to be liquidated and terminated on or about June 30, 2020. Effective March 5, 2020, the Fund was closed to new shareholders. You may redeem your shares of the Fund or exchange your shares of the Fund at NAV per share for shares of the same share class of another American Beacon Fund at any time prior to the Liquidation Date.

For more information, please see “About Your Investment” herein.

You may buy or sell shares of the Fund through a retirement account, an investment professional or another financial intermediary. Direct mutual fund account shareholders may buy subsequent shares or sell shares in various ways:


Internet	www.americanbeaconfunds.com
Phone	To reach an American Beacon representative call 1-800-658-5811, option 1 Through the Automated Voice Response Service call 1-800-658-5811, option 2 (Investor Class only)
Mail	American Beacon Funds P.O. Box 219643 Kansas City, MO 64121-9643	Overnight Delivery: American Beacon Funds c/o DST Asset Manager Solutions, Inc. 330 West 9th Street Kansas City, MO 64105

You may purchase or redeem shares of the Fund on any day the New York Stock Exchange (“NYSE”) is open, at the Fund’s net asset value (“NAV”) per share next calculated after your order is received in proper form, subject to any applicable sales charge.


	New Account	Existing Account
Share Class	Minimum Initial Investment Amount	Purchase/Redemption Minimum by Check/ACH/Exchange	Purchase/Redemption Minimum by Wire
C	$1,000	$50	$250
A, Investor	$2,500	$50	$250
Y	$100,000	$50	None
R5	$250,000	$50	None
Ultra	$500,000,000	$50	None

American Beacon GLG Total Return Fund - Summary Prospectus9

Tax Information

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

Payments to Broker-Dealers and Other Financial Intermediaries

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

10American Beacon GLG Total Return Fund - Summary Prospectus