(American Beacon Numeric Integrated Alpha 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. More information is available from your financial professional and in "Choosing Your Share Class" on page 14 of the Prospectus.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - (American Beacon Numeric Integrated Alpha Fund℠)	Class Y	Institutional Class	Investor Class	Ultra Class
Maximum sales charge imposed on purchases (as a percentage of offering price)	none	none	none	none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)	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 Numeric Integrated Alpha Fund℠)		Class Y	Institutional Class	Investor Class	Ultra Class
Management Fees		1.78%	1.78%	1.78%	1.78%
Distribution (12b-1) Fees		none	none	none	none
Other Expenses	[1]	4.47%	4.37%	4.75%	4.27%
Dividend Expense on Securities Sold Short		1.35%	1.35%	1.35%	1.35%
Broker Fees and Charges on Short Sales		2.76%	2.76%	2.76%	2.76%
Remaining Other Expenses		0.36%	0.26%	0.64%	0.16%
Acquired Fund Fees and Expenses	[1]	0.02%	0.02%	0.02%	0.02%
Total Annual Fund Operating Expenses		6.27%	6.17%	6.55%	6.07%
Fee Waiver and/or expense reimbursement	[2]	(0.09%)	(0.09%)	(0.09%)	(0.09%)
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement		6.18%	6.08%	6.46%	5.98%

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, 2018. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example - (American Beacon Numeric Integrated Alpha Fund℠) - USD ($)	1 Year	3 Years
Class Y	613	1,832
Institutional Class	604	1,805
Investor Class	640	1,906
Ultra Class	594	1,779

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. The Fund's portfolio turnover rate for the Fund's last fiscal year is not provided because the Fund has not commenced operations prior to the date of this Prospectus.

Principal Investment Strategies

The Fund seeks to achieve its investment objective primarily by implementing fundamental, research-based strategies that involve taking long and short positions in equity and equity-related securities in global markets. The Fund also utilizes strategies that seek to benefit from price trends and patterns, such as momentum, valuation and investor sentiment, in global, including foreign and emerging market, indexes. The sub-advisor employs a computerized process that uses quantitative modeling to accumulate information and identify potential investment opportunities to generate, long-term capital appreciation in excess of its performance benchmarks (commonly referred to as "alpha"), with less volatility than that of the equity markets.

The Fund primarily invests in equity securities including common stock, preferred stock, depositary receipts, and exchange-traded funds ("ETFs"). The Fund also utilizes equity-related securities including futures on equity indexes, including those of foreign and emerging markets, and total return swaps based on individual companies (also referred to as contracts for difference ("CFDs")). A CFD is a form of equity swap in which its value is based on the fluctuating value of some underlying asset and enables a fund to take short or long positions on an underlying stock, therefore, potentially capturing gains on movements in the share prices of the stock without the need to own the underlying stock. In addition, the Fund may invest in U. S. Treasuries and in futures on U.S. Treasuries. The Fund's use of futures and swaps is intended to generate profits, adjust leverage, hedge exposures, and manage volatility. The Fund's investments may be denominated in foreign currencies. Net exposure to non-U.S. currencies may be hedged using non-U.S. forward currency exchange contracts, including non-deliverable forwards ("NDFs").

The sub-advisor's long-short investment strategy is based on a highly-detailed and systematic approach to gathering and monitoring company financial information, market prices and other data that identify investment opportunities. The Fund invests in companies of any market capitalization but will generally invest in medium- and large-capitalization companies.

The Fund will take long positions in companies with attractive fundamentals and whose prices appear undervalued, and the Fund will take short positions in companies with deteriorating fundamentals and whose prices appear overvalued. Long positions benefit when the price of the security increases. Short positions benefit when the price of the security decreases. Patterns and variables that may affect company stock prices include the general business environment, mergers and acquisitions, restructurings, litigation or other events.

The sub-advisor's strategies also utilize price-trends and patterns based on broad, macroeconomic and market observations. At times, global equity and U.S. Treasury markets may exhibit trends based on investor sentiment, earnings expectations, price momentum and other variables. The sub-advisor analyzes these trends and seeks to generate long-term capital appreciation by taking both long and short positions on underlying stocks.

While there is no limit on the Fund's ability to take short positions, the Fund expects to maintain a net-long position in which the total value of its long holdings exceeds that of its short holdings. The amount of long and short holdings will vary based on the sub-advisor's outlook for individual companies and for market conditions in general. The greater the value of long positions as compared to the short positions, the more likely the Fund's returns will follow the direction of the equity market.

In pursuing its investment strategies, the Fund typically engages in active trading strategies that result in high portfolio turnover.

The Fund is non-diversified, which means that it is not limited to a percentage of assets that may be invested in any one issuer.

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 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 are:

Allocation and Correlation Risk
The sub-advisor's judgments about, and allocations between 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 and market correlations will be correct.

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.

Currency Risk
The Fund may have exposure to foreign currencies by making direct investments in non-U.S. currencies or in securities denominated in non-U.S. currencies, purchasing or selling forward currency exchange contracts in non-U.S. currencies, non-U.S. currency futures contracts and swaps for cross-currency investments. Foreign currencies will fluctuate, and may decline, in value relative to the U.S. dollar and other currencies and thereby affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies.

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 be illiquid and may be more volatile than other types of investments. The Fund may buy or sell derivatives not traded on an exchange and 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. As a result, the Fund may obtain no recovery of 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. In addition, the Fund's investments in derivatives are subject to the following risks:

• Contracts for Difference ("CFD"). A CFD is a contract between two parties, buyer and seller, stipulating that the seller will pay to the buyer the difference between the nominal value of the underlying stock at the opening of the contract and the stock's value at the close of the contract. The size of the contract and the contract's expiration date are typically negotiated by the parties to the CFD transaction. CFDs enable a fund to take short or long positions on an underlying stock and thus potentially capture gains on movements in the share prices of the stock without the need to own the underlying stock. By entering into a CFD transaction, the Fund could incur losses because it would face many of the same types of risks as owning the underlying equitiy securities directly as well as the other risks associated with the investment in swaps.

• Futures and Forward Contracts. Futures and forward contracts, including foreign currency exchange contracts and non-deliverable forwards ("NDFs"), are derivative instruments pursuant to a contract where one party pays 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 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. 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 may not be a liquid secondary market for the futures contracts. Forward currency transactions, including NDFs, and forward currency contracts include the risks associated with fluctuations in currency. Interest rate and Treasury 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. Treasury futures contracts expose the Fund to potential losses if interest rates do not move as expected.

• Swap Agreements. 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. Swap Agreements are subject to Counterparty Risk, Credit Risk and Liquidity Risk. In addition, total return swaps are subject to Interest Rate Risk and Market Risk if the underlying securities are bonds or other debt obligations.

Emerging Markets Risk
When investing in emerging markets, the risks of investing in foreign securities 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; and delays and disruptions in securities settlement procedures.

Equity Investments Risk
Equity securities are subject to Market Risk. The Fund's investments in equity securities may include common stocks, preferred stocks, and depositary receipts Such investments may expose the Fund to additional risks.

• Common Stock. 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.

• Preferred Stocks. Preferred stocks are sensitive to movements in interest rates. Preferred stocks also 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.

• Depositary Receipts. Investments in depositary receipts are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency fluctuations and political and financial instability in the home country of a particular depositary receipt or foreign stock.

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 and greater volatility, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased price volatility, (6) less 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.

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. High portfolio turnover 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.

Interest Rate Risk
The Fund is subject to the risk that the market value of securities or derivatives that are influenced by interest rates will decline due to changes in interest rates. As of the date of this Prospectus, interest rates are near historic lows, but may rise substantially and/or rapidly, potentially resulting in substantial losses to the Fund. Generally, the value of the investments with interest rate risk, such as fixed income securities, will move in the opposite direction as movements in interest rates. The prices of fixed income securities are also affected by their duration. Fixed income securities with longer duration generally have greater sensitivity to changes in interest rates. For example, if a bond has a duration of four years, a 1% increase in interest rates could be expected to result in a 4% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well.

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 which 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 and may be unable to attain high growth rates during periods of economic expansion.

Leverage Risk
The Fund's use of futures, forward contracts, swaps, other 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 results 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") to be volatile.

Liquidity Risk
The Fund is susceptible to the risk that certain investments held by the Fund, such as contracts for difference and total return swaps, may have limited marketability or be subject to restrictions on sale, and may be difficult to sell at favorable times or prices. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund. For example, the Fund may be forced to sell certain investments at unfavorable prices to meet redemption requests or other cash needs.

Market Risk
Since the financial crisis that started in 2008, the U.S. and many foreign economies continue to experience its after-effects, which have resulted, and may continue to result, in fixed income instruments experiencing 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. 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 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.

Market Direction Risk
Since the Fund will typically hold both long and short positions, an investment in the Fund will involve market risks associated with different types of investment decisions than those made for a typical "long only" fund. The Fund's results could suffer both when there is a general market advance and the Fund holds significant "short" positions, and when there is a general market decline and the Fund holds significant "long" positions.

Market Timing Risk
Because the Fund invests in foreign securities or it has exposure to foreign securities through the derivatives it holds, it is particularly subject to the risk of market timing activities. 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. Because of specific securities in which the Fund may invest, it could be subject to the risk of market timing activities by shareholders.

Model and Data Risk
The sub-advisor relies heavily on proprietary trading models ("Models") and both proprietary and external information and market data ("Data") to generate investment strategies, to estimate investment values and to identify specific trade recommendations. The sub-advisor also relies on Models and Data to identify and manage investment risk and to assist in determining appropriate hedging strategies that seek to reduce certain risks.

Models and Data may be extremely complex and may have errors, omissions, imperfections and malfunctions (collectively referred to as "System Events"). More complex Models and Data typically have a higher potential for System Events and may result in investment losses in the Fund. Additionally, investments in derivative securities may increase the risks associated with System Events.

Non-Diversification Risk
The Fund is non-diversified, which means the Fund 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 and potential losses than if assets were diversified among the securities of a greater number of issuers.

Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including exchange-traded funds ("ETFs"). To the extent that the Fund invests in shares of other registered investment companies, you will indirectly bear fees and expenses charged by the underlying funds in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those funds. For example, ETF shares may trade at a premium or discount to their net asset value. An ETF that tracks an index may not precisely replicate the returns of its benchmark index.

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.

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.

Risk of Programming and Modeling Error
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.

Sector Risk
Sector risk is the risk associated with the Fund holding a significant amount of investments in similar businesses, which could be affected by the same economic or market conditions.

Securities Selection Risk
Securities selected by the sub-advisor or the Manager for the Fund may not perform to expectations. The sub-advisor's investment models may rely in part on data derived from third parties and may not perform as intended. This could result in the Fund's underperformance compared to other funds with similar investment objectives.

Segregated Assets Risk
In connection with certain transactions that may give rise to future payment obligations, including short sales and investments in derivatives, the Fund may be required to maintain a segregated amount of, or otherwise earmark, cash or liquid securities to cover the position or transaction, which cannot be sold while the position they are covering is outstanding, unless they are replaced with other assets of equal value.

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.

Small and Mid-Capitalization Companies Risk
Investing in the securities of small and mid-capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since small and mid-capitalization companies may have limited operating history, product lines, and financial resources, 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.

U.S. Government Securities Risk
A security backed by the U.S. Treasury or the full faith and credit of the United States is only guaranteed by the applicable entity 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.

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, such as certain derivatives, which may be illiquid or which may become illiquid.

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

Performance information for the Fund is not provided because the Fund had not commenced operations prior to the date of this Prospectus.

[1] Other Expenses and Acquired Fund Fees and Expenses are based on estimated expenses for the current fiscal year.

[2] The Manager has contractually agreed to waive fees and/or reimburse expenses of the Fund's Y Class, Institutional Class, Investor Class and Ultra Class shares, as applicable, through May 31, 2018, to the extent that Total Annual Fund Operating Expenses exceed 2.05% for the Y Class, 1.95% for the Institutional Class, 2.33% for the Investor Class and 1.85% 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 only in the discretion and with the approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own waiver or 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.