American Beacon Select Funds N-CSRCertified annual shareholder report (management investment company)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number: 811-9603

AMERICAN BEACON SELECT FUNDS

(Exact name of registrant as specified in charter)

220 East Las Colinas Boulevard, Suite 1200

Irving, Texas 75039

(Address of principal executive offices)-(Zip code)

GENE L. NEEDLES, JR., PRESIDENT

220 East Las Colinas Boulevard, Suite 1200

Irving, Texas 75039

(Name and address of agent for service)

Registrant’s telephone number, including area code: (817) 391-6100

Date of fiscal year end: December 31, 2021

Date of reporting period: December 31, 2021

Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

ITEM 1. REPORTS TO STOCKHOLDERS.

About American Beacon Advisors

Since 1986, American Beacon Advisors, Inc. has offered a variety of products and investment advisory services to numerous institutional and retail clients, including a variety of mutual funds, corporate cash management, and separate account management.

Our clients include defined benefit plans, defined contribution plans, foundations, endowments, corporations, financial planners, and other institutional investors. With American Beacon Advisors, you can put the experience of a multi-billion dollar asset management firm to work for your company.

U.S. GOVERNMENT MONEY MARKET SELECT FUND

You could lose money by investing in the American Beacon U.S. Government Money Market Select Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund’s sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time. Please see the prospectus for a complete discussion of the Fund’s risks. There can be no assurances that the investment objectives of this Fund will be met.

Any opinions herein, including forecasts, reflect our judgment as of the end of the reporting period and are subject to change. Each advisor’s strategies and each Fund’s portfolio composition will change depending on economic and market conditions. This report is not a complete analysis of market conditions, and, therefore, should not be relied upon as investment advice. Although economic and market information has been compiled from reliable sources, American Beacon Advisors, Inc. makes no representation as to the completeness or accuracy of the statements contained herein.

Contents

President’s Message

		Dear Shareholders,   As Warren E. Buffett, the “Oracle of Omaha” and billionaire chairman and CEO of Berkshire Hathaway, once said, “Someone’s sitting in the shade today because someone planted a tree a long time ago.”   That is to say, before we can enjoy the fruits of our labor, we must first devote our attention to the careful planning and cultivation of our estates. To achieve a strong yield requires time, diligence and patience – and there are no guarantees the seeds we plant today will thrive or result in a plentiful harvest. This can be said not only about the actions we undertake in our gardening or landscaping, but also those we initiate in our investment portfolios – especially as we take into account the potential for harm caused by natural disasters and other catastrophes, such as the COVID-19 pandemic.

Because none of us – not even the Oracle of Omaha – has a crystal ball, to help give your investment portfolio the greatest chance for success over the long term, we encourage you to work with financial professionals to develop your personal savings plan, conduct annual plan reviews, and make thoughtful, purposeful plan adjustments to help manage your evolving financial needs and goals. By investing in different investment styles and asset classes, you may be able to help mitigate financial risks across your portfolio. By allocating your portfolio according to your risk-tolerance level, you may be better positioned to withstand short-term crises. With continuous nurturing, you will be better positioned to achieve enduring financial success.

Since 1986, American Beacon has endeavored to provide investors with a disciplined approach to realizing long-term financial goals. As a manager of managers, we strive to provide investment products that may enable investors to participate during market upswings while potentially insulating against market downswings. The investment teams behind our mutual funds seek to produce consistent, long-term results rather than focus only on short-term movements in the markets. In managing our investment products, we emphasize identifying opportunities that offer the potential for long-term financial rewards.

Thank you for entrusting your financial success with American Beacon. For additional information about our investment products or to access your account information, please visit our website at www.americanbeaconfunds.com.

Best Regards,

Gene L. Needles, Jr.

President

American Beacon Select Funds

1

Market Overview

December 31, 2020 (Unaudited)

2021 ended much as it began. The COVID-19 pandemic persisted, supply-chain backlogs and labor shortages intensified, inflation pressures escalated, and interest rates were on the rise. However, the fourth quarter added a new element to the economic landscape – the Federal Reserve (“Fed”) pivot, in which it moved away from its commitment to keep monetary policy extremely accommodative and began the process of balance sheet normalization. The Federal Open Market Committee (“FOMC”) announced the tapering of asset purchases, began the taper, accelerated the taper and increased its expectations for rate hikes all during the fourth quarter. Interest rates responded to this about-face accordingly with the short end of the yield curve rising sharply in anticipation of faster rate hikes while longer-term rates fell slightly, resulting in a flatter curve by year end. Equity markets stumbled on the Fed’s abrupt policy shift but ended the year near record highs as investors focused on U.S. economic resilience and robust corporate earnings.

The U.S. economy picked up steam toward the end of the year. Both Manufacturing and Service sectors continued expanding at a healthy clip despite ongoing supply constraints and labor shortages. The holiday shopping season was in full force as elevated savings and rising wages buoyed consumer demand. However, most of the spending spree occurred in the third quarter and early in the fourth quarter as households did holiday shopping earlier to avoid shipping delays. The housing market also remained robust as Americans’ desire for more space – coupled with increased opportunities to work from anywhere – kept demand elevated despite decreasing affordability. Supporting it all was a strong labor market that continued to tighten as employers made progress filling near-record vacancies. Job gains were broad-based with non-farm payrolls increasing on average by more than 500,000 per month during the year. Although the pace of job growth slowed in the fourth quarter, the unemployment rate continued to fall, dropping to 3.9% by year end. Depressed workforce participation rates and record resignation levels resulted in sustained wage increases as employers paid more to attract and retain workers. Higher wages, combined with rising material and transportation costs, led businesses to raise prices to protect margins. As a result, inflation measures continued climbing, and consumer price inflation hit a 39-year high in December.

The inflation surge, together with a labor market that is approaching full employment, spurred the Fed into action during the fourth quarter. After setting the stage for tapering at the September FOMC meeting, the Fed began decreasing asset purchases as expected in November at a pace of $10 billion less in Treasuries and $5 billion less in mortgage-backed securities per month. Because it was well broadcast, market reaction to the initial taper was minimal. However, things heated up quickly after Chairman Jerome Powell’s November 30 appearance before the Senate Banking Committee. During his testimony, Mr. Powell said it was time to retire the word “transitory” when describing inflation and stated that the Fed had met its inflation goal. As such, he felt it was appropriate to consider speeding up the taper and ending asset purchases a few months sooner. This prompted a sell-off in both the stock and bond markets as investors digested the implications of an accelerated taper and adjusted their timelines for federal funds rate hikes. Hawkish rhetoric continued after Mr. Powell’s testimony as other FOMC members signaled their support for an earlier end to asset purchases. Therefore, it was not much of a surprise when policymakers unanimously voted to double the pace of the taper at the December FOMC meeting. Quantitative easing is now expected to end in March 2022 instead of June 2022. What did surprise the markets was the Fed’s updated dot-plot forecast, which showed participants projecting three rate hikes in 2022. In his post-meeting press conference, Mr. Powell acknowledged that high inflation has proven more stubborn and widespread than the Fed had predicted and that the central bank will use its tools to prevent higher inflation from becoming entrenched. The FOMC meeting minutes revealed an even more hawkish tone. In addition to increasing rates sooner and faster than earlier anticipated, “some participants also noted that it could be appropriate to begin to reduce the size of the Federal Reserve’s balance sheet relatively soon after beginning to raise the federal funds rate.”

While the FOMC appears intent on tackling inflation, emergence of the omicron variant of COVID-19 in late November may complicate efforts. Although COVID-19 cases have surged to record levels around the globe, hospitalizations and deaths have been fewer. Nonetheless, the omicron variant has dented travel and leisure demand and could further disrupt already fragile supply chains as quarantines and illness prevent employees from going to work. The Fed acknowledged that the omicron variant posed risks to the economic outlook and complicated the inflation picture. For now, at least, it appears that the priority remains fighting inflation instead of the threat of the omicron variant’s impact on economic activity as the Fed believes the variant may contribute more to inflation than it detracts from growth.

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American Beacon U.S. Government Money Market Select Fund^SM

Performance Overview

December 31, 2021 (Unaudited)

The year ended much the way it began. COVID-19 continued to rage on, supply chain backlogs and labor shortages intensified, inflation pressures escalated and interest rates were on the rise. The housing market remained robust during the year, supported by a strong labor market and relatively low mortgage rates. Also, the unemployment rate began the year at 6.7% and improved to 3.9% by the end of the year. The Federal Reserve Bank (“Fed”) stayed on the sidelines for most of the year until they announced the decrease of asset purchases in November due to the surge in inflation. As we head into 2022, it appears the Fed will begin raising the fed funds target to deal with the persistent inflation data, it’s just a matter of how aggressive they will be during the year.

The Federal Open Market Committee (FOMC) kept the fed funds rate unchanged for the year in a target range of 0.00%-0.25%. It was not until the fourth quarter that the Fed began moving away from their accommodative stance and reducing their asset purchases of Treasuries and mortgage-backed securities. The language coming out of the FOMC in December, their last meeting of the year, was more hawkish than expected. The Fed updated their dot plot to show three 25 basis point (0.25%) increases in 2022.

During the year, the American Beacon U.S. Government Money Market Select Fund’s primary strategy was to buy fixed rate agencies/treasuries, floating rate agencies along with overnight repurchase agreements.

For the twelve months ended December 31, 2021, the total return of the American Beacon U.S. Government Money Market Select Fund was 0.01%. The Fund underperformed the Lipper Institutional U.S. Government Money Market Average return of 0.02% by 1 basis points (0.01%). Based on annualized total returns, Lipper Analytical Services ranked the Fund 90th among 216, 8th among 184 and 3rd among 138 Institutional U.S. Government Money Market Funds for the one-year, five-year, and ten-year periods ended December 31, 2021, respectively.

Total Returns for the Period ended December 31, 2021

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American Beacon U.S. Government Money Market Select Fund^SM

Performance Overview

December 31, 2021 (Unaudited)

4

American Beacon U.S. Government Money Market Select Fund^SM

Expense Examples

December 31, 2021 (Unaudited)

Fund Expense Example

As a shareholder of a Fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase payments and redemption fees, if applicable, and (2) ongoing costs, including management fees, distribution (12b-1) fees, sub-transfer agent fees, and other Fund expenses. The Examples are intended to help you understand the ongoing cost (in dollars) of investing in the Funds and to compare these costs with the ongoing costs of investing in other mutual funds. The Examples are based on an investment of $1,000 invested at the beginning of the period in each Class and held for the entire period from July 1, 2021 through December 31, 2021.

Actual Expenses

The “Actual” lines of the tables provide information about actual account values and actual expenses. You may use the information on this page, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = $8.60), then multiply the result by the “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes

The “Hypothetical” lines of the tables provide information about hypothetical account values and hypothetical expenses based on the Fund’s actual expense ratio and an assumed 5% per year rate of return before expenses (not the Fund’s actual return). You may compare the ongoing costs of investing in the Funds with other funds by contrasting this 5% hypothetical example and the 5% hypothetical examples that appear in the shareholder reports of the other funds. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period.

You should also be aware that the expenses shown in the table highlight only your ongoing costs and do not reflect any transaction costs charged by the Funds, such as sales charges (loads) or redemption fees, as applicable. Similarly, the expense examples for other funds do not reflect any transaction costs charged by those funds, such as sales charges (loads), redemption fees or exchange fees. Therefore, the “Hypothetical” lines of the tables are useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. If you were subject to any transaction costs during the period, your costs would have been higher.

5

American Beacon U.S. Government Money Market Select Fund^SM

Expense Examples

December 31, 2021 (Unaudited)

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American Beacon U.S. Government Money Market Select Fund^SM

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Trustees of American Beacon U.S. Government Money Market Select Fund

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of American Beacon U.S. Government Money Market Select Fund (the “Fund”) (the only fund constituting American Beacon Select Funds (the “Trust”)), including the schedule of investments, as of December 31, 2021, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund at December 31, 2021, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and its financial highlights for each of the five years in the period then ended, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Trust’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Trust in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Trust is not required to have, nor were we engaged to perform, an audit of the Trust’s internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Trust’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of December 31, 2021, by correspondence with the custodian. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as the auditor for one or more American Beacon investment companies since 1987.

Dallas, Texas

February 28, 2022

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American Beacon U.S. Government Money Market Select Fund^SM

Schedule of Investments

December 31, 2021

See accompanying notes

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American Beacon U.S. Government Money Market Select Fund^SM

Schedule of Investments

December 31, 2021

^A Variable, floating, or adjustable rate securities with an interest rate that changes periodically. Rates are periodically reset with rates that are based on a predetermined benchmark such as a widely followed interest rate such as T-bills, SOFR, LIBOR or PRIME plus a fixed spread. The interest rate disclosed reflects the rate in effect on December 31, 2021.

^B 7-day yield.

FFR - U.S. Federal Funds Rate.

LIBOR - London Interbank Offered Rate.

PRIME - A rate, charged by banks, based on the U.S. Federal Funds rate.

SOFR - Secured Overnight Financing Rate.

The Fund’s investments are summarized by level based on the inputs used to determine their values. As of December 31, 2021, the investments were classified as described below:

U.S. GAAP requires transfers between all levels to/from level 3 be disclosed. During the year ended December 31, 2021, there were no transfers into or out of Level 3.

See accompanying notes

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American Beacon U.S. Government Money Market Select Fund^SM

Statement of Assets and Liabilities

December 31, 2021

See accompanying notes

10

American Beacon U.S. Government Money Market Select Fund^SM

Statement of Operations

For the year ended December 31, 2021

See accompanying notes

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American Beacon U.S. Government Money Market Select Fund^SM

Statement of Changes in Net Assets

See accompanying notes

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American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

1.  Organization and Significant Accounting Policies

American Beacon Select Funds (the “Trust”) is organized as a Massachusetts business trust. The Fund, a series within the Trust, is registered under the Investment Company Act of 1940, as amended (the “Act”), as a diversified, open-end management investment company. As of December 31, 2021, the Trust consists of one active series, which is presented in this filing: American Beacon U.S. Government Money Market Select Fund (the “Fund”).

American Beacon Advisors, Inc. (the “Manager”) is a Delaware corporation and a wholly-owned subsidiary of Resolute Investment Managers, Inc. (“RIM”) organized in 1986 to provide business management, advisory, administrative, and asset management consulting services to the Trust and other investors. The Manager is registered as an investment advisor under the Investment Advisers Act of 1940, as amended (the “Advisers Act”). RIM is, in turn, a wholly-owned subsidiary of Resolute Acquisition, Inc., which is a wholly-owned subsidiary of Resolute Topco, Inc., a wholly-owned subsidiary of Resolute Investment Holdings, LLC (“RIH”). RIH is owned primarily by Kelso Investment Associates VIII, L.P., KEP VI, LLC and Estancia Capital Partners L.P., investment funds affiliated with Kelso & Company, L.P. (“Kelso”) or Estancia Capital Management, LLC (“Estancia”), which are private equity firms.

Recently Adopted Accounting Pronouncements

In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, which provides optional expedients and exceptions for contracts, hedging relationships and other transactions affected by the transitioning away from the London Interbank Offered Rate (“LIBOR”) and other reference rates that are expected to be discontinued. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. At this time, management is evaluating the implications of these changes on the financial statements.

Significant Accounting Policies

The following is a summary of significant accounting policies, consistently followed by the Fund in preparation of the financial statements. The Fund is considered an investment company and accordingly, follows the investment company accounting and reporting guidance of the FASB Accounting Standards Codification Topic 946, Financial Services – Investment Companies, a part of Generally Accepted Accounting Principles (“U.S. GAAP”).

Security Transactions and Investment Income

Security transactions are recorded as of the trade date for financial reporting purposes. Securities purchased or sold on a when-issued or delayed-delivery basis may be settled beyond a standard settlement period for the security after the trade date.

Interest income for the Fund is earned from settlement date, recorded on the accrual basis, and adjusted, if necessary, for amortization of premiums or accretion of discounts on investment grade short-term securities and zero coupon instruments. For financial and tax reporting purposes, realized gains and losses are determined based on specific lot identification.

Dividends to Shareholders

Dividends from net investment income and net short-term capital gain, if any, are accrued daily and paid monthly. Dividends to shareholders are determined in accordance with federal income tax regulations, which may differ in amount and character from net investment income and realized gains recognized for purposes of U.S. GAAP.

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American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results may differ from those estimated.

Other

Under the Trust’s organizational documents, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust. In the normal course of business, the Trust enters into contracts that provide indemnification to the other party or parties against potential costs or liabilities. The Trust’s maximum exposure under these arrangements is dependent on claims that may be made in the future and, therefore, cannot be estimated. The Trust has had no prior claims or losses pursuant to any such agreement.

2.  Transactions with Affiliates

Management Agreement

The Fund and the Manager are parties to a Management Agreement that obligates the Manager to provide investment advisory, fund management, and administrative services to the Fund. As compensation for performing the duties under the Management Agreement, the Manager receives from the Fund an annualized fee of 0.10% of the Fund’s average daily net assets. Management fees paid by the Fund for the year ended December 31, 2021 were $823,096.

Expense Reimbursement Plan

The Manager voluntarily agreed to limit the expense ratio of the Fund in order to maintain a minimum yield for the Fund. During the year ended December 31, 2021, the Manager waived and/or reimbursed expenses in the amount of $655,488 expiring in 2024.

Of the above amount, $94,960 was disclosed as a Receivable for Expense Reimbursement on the Statement of Assets and Liabilities at December 31, 2021.

The Fund has adopted an Expense Reimbursement Plan whereby the Manager may seek repayment of such fee reductions and expense reimbursements. Under the policy, the Manager can be reimbursed by the Fund for any contractual or voluntary fee reductions 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 Fund’s annual operating expenses to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or time of recoupment. The reimbursed expenses noted above will expire in 2024. The Fund did not record a liability for potential reimbursement due to the current assessment that reimbursements are uncertain. The carryover of excess expenses potentially reimburseable to the Manager, but not recorded as a liability are as follows:

Concentration of Ownership

From time to time, the Fund may have a concentration of one or more accounts constituting a significant percentage of shares outstanding. Investment activities by holders of accounts that represent a significant ownership of more than 5% of the Fund’s outstanding shares could have a material impact on the Fund. As of December 31, 2021, 90% of the Fund’s outstanding shares were held by affiliated American Beacon Funds.

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American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

Trustee Fees and Expenses

Effective January 1, 2021, as compensation for their service to the American Beacon Funds Complex, including the Trust (collectively, the “Trusts”), each Trustee is compensated from the Trusts as follows: (1) an annual retainer of $120,000; (2) meeting attendance fee (for attendance in-person or via teleconference) of (a) $12,000 for in person attendance, or $5,000 for telephonic attendance, by Board members for each regularly scheduled or special Board meeting, (b) $2,500 for attendance by Committee members at meetings of the Audit and Compliance Committee and the Investment Committee, (c) $1,000 for attendance by Committee members at meetings of the Nominating and Governance Committee; and (d) $2,500 for attendance by Board members for each special telephonic Board meeting; and (3) reimbursement of reasonable expenses incurred in attending Board meetings, Committee meetings, and relevant educational seminars. For this purpose, the Board considers attendance at regular meetings held by video conference to constitute in-person attendance at a Board meeting. The Trustees also may be compensated for attendance at special Board and/or Committee meetings from time to time. For her service as Board Chair, Ms. Cline receives an additional annual retainer of $50,000. Although she attends several committee meetings at each quarterly Board meeting, she receives only a single $2,500 fee each quarter for her attendance at those meetings. The chairpersons of the Audit and Compliance Committee and the Investment Committee each receive an additional annual retainer of $25,000 and the Chair of the Nominating and Governance Committee receives an additional annual retainer of $10,000.

3.  Security Valuation and Fair Value Measurements

The Fund values its investments and computes the net asset value (“NAV”) per share at the close of the New York Stock Exchange (the “Exchange”), normally 4:00 p.m. Eastern Time, each day that the Exchange is open for business. In accordance with Rule 2a-7 under the Act, money market securities, with the exception of repurchase agreements, are valued at amortized cost, which approximates fair value; repurchase agreements are valued based on par. Securities for which amortized cost is deemed not to reflect fair value are stated at fair value as determined in good faith by the Valuation Committee, established by the Trust’s Board of Trustees (the “Board”). In the event that a deviation of ¹⁄₂ of 1% or more exists between the $1.00 per share price of the Fund, calculated at amortized cost, and the price per share calculated by reference to market quotations, or if there is any other deviation that the Board believes would result in a material dilution to shareholders or purchasers, the Board will promptly consider the appropriate action that should be initiated.

Investments in open-end mutual funds are valued at the closing NAV per share of the mutual fund on the day of valuation.

Valuation Inputs

Various inputs may be used to determine the fair value of the Fund’s investments. These inputs are summarized in three broad levels for financial statement purposes. The inputs or methodologies used to value securities are not necessarily an indication of the risk associated with investing in those securities.

Level 1 and Level 2 trading assets and trading liabilities, at fair value

Money market securities are valued using amortized cost, in accordance with rules under the Act. Generally, amortized cost approximates the current value of a security, but since the value is not obtained from a quoted price in an active market, such securities are reflected as Level 2.

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American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

Investments in registered open-end investment management companies will be valued based upon the NAVs of such investments and are categorized as Level 1 of the fair value hierarchy.

4.  Securities and Other Investments

Other Government Money Market Fund Securities

The Fund, at times, may invest in shares of other government money market funds. Investments in the securities of other government money market funds may involve duplication of advisory fees and certain other expenses. By investing in another government money market fund, the Fund becomes a shareholder of that government money market fund. As a result, Fund shareholders indirectly will bear the Fund’s proportionate share of the fees and expenses paid by shareholders of the other government money market fund, in addition to the fees and expenses Fund shareholders directly bear in connection with the Fund’s own operations. These other fees and expenses are reflected as Acquired Fund Fees and Expenses and are included in the Fees and Expenses Table for the Fund in its Prospectus, if applicable. Investment in other government money market funds may involve the payment of substantial premiums above the value of such issuer’s portfolio securities.

Although a money market fund is designed to be a relatively low risk investment, it is not free of risk. Despite the short maturities and high credit quality of a money market fund’s investments, increases in interest rates and deteriorations in the credit quality of the instruments the money market fund has purchased may reduce the money market fund’s yield and can cause the price of a money market security to decrease. In addition, a money market fund is subject to the risk that the value of an investment may be eroded over time by inflation.

Repurchase Agreements

A repurchase agreement is an agreement between the Fund as purchaser and an approved counterparty as seller. The agreement is backed by collateral in the form of securities and/or cash transferred by the seller to the buyer, sometimes to be held by an eligible third-party custodian. Under the agreement, the Fund acquires securities from the seller and the seller simultaneously commits to repurchase the securities at an agreed upon price and date, normally within a week or on demand. The price for the seller to repurchase the securities is greater than the Fund’s purchase price, reflecting an agreed upon rate that is the equivalent of interest. During the term of the repurchase agreement, the Fund monitors on a daily basis the market value of the collateral subject to the agreement and, if the market value of the securities falls below the seller’s repurchase amount provided under the repurchase agreement, the seller is required to transfer additional securities or cash collateral equal to the amount by which the market value of the securities falls below the repurchase amount. Because a repurchase agreement permits the Fund to invest temporarily available cash on a fully-collateralized basis, repurchase agreements permit the Fund to earn income while retaining flexibility in pursuit of longer-term investments. Repurchase agreements may exhibit the economic characteristics of loans by the Fund.

The obligation of the seller under the repurchase agreement is not guaranteed, and there is a risk that the seller may fail to repurchase the underlying securities, whether because of the seller’s bankruptcy or otherwise. In such event, the Fund would attempt to exercise its rights with respect to the underlying collateral, including possible sale of the securities. The Fund may incur various expenses in connection with the exercise of its rights and may be subject to various delays and risks of loss, including (a) possible declines in the value of the underlying collateral, (b) possible reduction in levels of income and (c) lack of access to the securities (if they are held through a third-party custodian) and possible inability to enforce the Fund’s rights. The Board has established procedures pursuant to which the Manager monitors the creditworthiness of the counterparties with which the Fund enters into repurchase agreement transactions.

The Fund may enter into repurchase agreements with member banks of the Federal Reserve System or registered broker-dealers who, in the opinion of the Manager, present a minimal risk of default during the term of the agreement. The underlying securities which serve as collateral for repurchase agreements may include fixed income and equity securities such as U.S. Government and agency securities, municipal obligations, corporate obligations, asset-backed securities, mortgage-backed securities, common and preferred stock, depositary receipts, ETFs, corporate obligations and convertible securities.

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American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

Repurchase agreements that are collateralized fully may be deemed to be an acquisition of the underlying collateral (i.e. cash and/or Government Securities) and thus allow the Fund to have exposure to the seller that exceeds the typical issuer limit under Rule 2a-7.

As of December 31, 2021, the Fund had investments in repurchase agreements with a gross value of $125,000,000 as disclosed in the Schedule of Investments and the Statement of Assets and Liabilities.

U.S. Government Agency Securities

U.S. Government agency securities are issued or guaranteed by the U.S. Government or its agencies or instrumentalities. Some obligations issued by U.S. Government agencies and instrumentalities are supported by the full faith and credit of the U.S. Treasury; others by the right of the issuer to borrow from the U.S. Treasury; others by discretionary authority of the U.S. Government to purchase certain obligations of the agency or instrumentality; and others only by the credit of the agency or instrumentality. U.S. Government securities bear fixed, floating or variable rates of interest. While the U.S. Government currently provides financial support to certain U.S. Government-sponsored agencies or instrumentalities, no assurance can be given that it will always do so, since it is not so obligated by law. U.S. Government securities include U.S. Treasury bills, notes and bonds, Federal Home Loan Bank (“FHLB”) obligations, Federal Farm Credit Bank (“FFCB”) obligations, U.S. Government agency obligations and repurchase agreements secured thereby. U.S. Government agency securities are subject to credit risk and interest rate risk.

U.S. Treasury Obligations

U.S. Treasury obligations include bills (initial maturities of one year or less), notes (initial maturities between two and ten years), and bonds (initial maturities over ten years) issued by the U.S. Treasury, Separately Traded Registered Interest and Principal component parts of such obligations (known as “STRIPS”) and inflation-indexed securities. The prices of these securities (like all debt securities) change between issuance and maturity in response to fluctuating market interest rates and credit ratings. The principal and interest components of selected securities are traded independently under the STRIPS program. Under the STRIPS program, the principal and interest components are individually numbered and separately issued by the U.S. Treasury at the request of depository financial institutions, which then trade the component parts independently.

Variable or Floating Rate Obligations

The interest rates payable on certain fixed-income securities in which the Fund may invest are not fixed and may fluctuate based upon changes in market rates. A variable rate obligation has an interest rate which is adjusted at predesignated periods in response to changes in the market rate of interest on which the interest rate is based. Variable and floating rate obligations are less effective than fixed rate instruments at locking in a particular yield. Nevertheless, such obligations may fluctuate in value in response to interest rate changes if there is a delay between changes in market interest rates and the interest reset date for the obligation, or for other reasons.

The terms of the variable or floating rate demand instruments that the Fund may purchase provide that interest rates are adjustable at intervals ranging from daily up to 397 calendar days, and the adjustments are based upon current market levels, the prime rate of a bank or other appropriate interest rate adjustment index as provided in the respective instruments. Some of these instruments are payable on demand on a daily basis or on not more than seven days’ notice. Others, such as instruments with quarterly or semi-annual interest rate adjustments, may be put back to the issuer on designated days, usually on not more than thirty days’ notice. Still others are automatically called by the issuer unless the Fund instructs otherwise.

The Fund may consider the maturity of a long-term variable or floating rate demand instrument to be shorter than its ultimate stated maturity under specified conditions. The acquisition of variable or floating rate demand notes for the Fund must also meet the requirements of rules issued by the U.S. Securities and Exchange

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American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

Commission (“SEC”) applicable to the use of the amortized cost method of securities valuation, specifically Rule 2a-7 under the Act. The Fund will also consider the liquidity of the market for variable and floating rate instruments, and in the event that such instruments are illiquid, the Fund’s investments in such instruments will be subject to the limitation on illiquid investments.

Pursuant to Rule 2a-7 under the Act, variable or floating rate obligations may be deemed to have maturities shorter than their stated maturities as follows:

(1) An obligation that is issued or guaranteed by the U.S. Government or any agency thereof which has a variable rate of interest readjusted no less frequently than every 397 days will be deemed by the Fund to have a maturity equal to the period remaining until the next readjustment of the interest rate. A U.S. Government security that is a floating rate security shall be deemed to have a remaining maturity of one day.

(2) A variable rate obligation, the principal amount of which must unconditionally be paid in 397 days or less, will be deemed by the Fund to have a maturity equal to the earlier of the period remaining until the next readjustment of the interest rate or the period remaining until the principal amount can be recovered through demand.

(3) A floating rate obligation, the principal amount of which must unconditionally be paid in 397 days or less, will be deemed by the Fund to have a maturity of one day, except for purposes of determining the Fund’s weighted average life, in which case it shall be deemed to have a maturity equal to the period remaining until the principal amount can be recovered through demand.

(4) A variable rate obligation that is subject to a demand feature will be deemed by the Fund to have a maturity equal to the longer of the period remaining until the next readjustment of the interest rate or the period remaining until the principal amount can be recovered through demand.

(5) A floating rate obligation that is subject to a demand feature will be deemed by the Fund to have a maturity equal to the period remaining until the principal amount can be recovered through demand. As used above, an obligation is “subject to a demand feature” when the Fund is entitled to receive the approximate amortized cost of the security plus accrued interest, if any, at the later of the time of exercise or the settlement of the transaction, paid within 397 calendar days of exercise.

5.  Principal Risks

Investing in the Fund may involve certain risks including, but not limited to, those described below.

Credit Risk

The value of a security held by the Fund may decline if the security’s credit quality, or that of the security’s issuer or provider of credit support is downgraded or their credit quality otherwise falls. A decline in the credit rating of an individual security held by the Fund may have an adverse impact on its price and make it difficult for the Fund to sell it. Ratings represent a rating agency’s opinion regarding the quality of the security and are not a guarantee of quality. Rating agencies might not always change their credit rating on an issuer or security in a timely manner to reflect events that could affect the issuer’s ability to make timely payments on its obligations. As with any money market fund, there is the risk that the issuers or guarantors of securities owned by the Fund, including securities issued by U.S. Government agencies, which are not backed by the full faith and credit of the U.S. Government, will default on the payment of principal or interest or the obligation to repurchase securities from the Fund. This could cause the Fund’s NAV to decline below $1.00 per share.

Interest Rate Risk

There is a risk that a decline in short-term interest rates would lower the Fund’s yield and the return on your investment, which may have an adverse effect on the Fund’s ability to provide a positive yield to its

18

American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

shareholders. Changes in interest rates also may change the resale value of the instruments held in the Fund’s portfolio. Generally, the value of investments with interest rate risk will move in the opposite direction to movements in interest rates. When interest rates go up, the market values of previously issued money market instruments generally decline and may have an adverse effect on the Fund’s ability to maintain a stable $1.00 share price. As of the date of this report, 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.

Liquidity Risk

The Fund is susceptible to the risk that certain investments held by the Fund may 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 at favorable times or prices can adversely affect the Fund’s ability to maintain a $1.00 share price. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund. In addition, the Fund may experience difficulty satisfying redemption requests within the time periods stated in the “Redemption Policies” section of this Prospectus because of unusual market conditions, an unusually high volume of redemption requests or other reasons.

Market Risk

In recent periods, 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 vote to leave the European Union, the risk of a “trade war” between the United States and 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. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasigovernmental 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.

Mortgage-Related Securities Risk

Mortgage-related and asset-backed securities are subject to market risks for fixed-income securities, which include, but are not limited to: credit risk, interest rate risk, prepayment risk and extension risk. The value of these securities will be influenced by the factors affecting the housing market and the assets underlying such securities. As a result, during periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, mortgage-related securities may decline in value, face valuation difficulties, become more volatile and/or become illiquid. Additionally, during such periods and also under normal conditions, these securities are also subject to prepayment and call risk. Gains and losses associated with prepayments will increase/decrease the income available for distributions by the Fund and the Fund’s yield. When mortgages and

19

American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

other obligations are prepaid and when securities are called, the Fund may have to reinvest in securities with a lower yield or fail to recover additional amounts (i.e., premiums) paid for securities with higher interest rates, resulting in an unexpected capital loss and/or a decrease in the amount of dividends and yield. In periods of rising interest rates, the Fund may be subject to extension risk, and may receive principal later than expected. As a result, in periods of rising interest rates, the Fund may exhibit additional volatility. Some of these securities may receive little or no collateral protection from the underlying assets and are thus subject to the risk of default. Moreover, declines in the credit quality of the issuers of mortgage-related securities or instability in the markets for such securities may affect the value and liquidity of such securities, which could result in losses to the Fund. Additionally, certain mortgage-related securities may include securities backed by pools of loans made to “subprime” borrowers or borrowers with blemished credit histories; the risk of defaults is generally higher in the case of mortgage pools that include such subprime mortgages.

Net Asset Value Risk

There is no assurance that the Fund will meet its investment objective of maintaining a stable price of $1.00 per share on a continuous basis. Furthermore, there can be no assurance that the Fund’s affiliates will purchase distressed assets from the Fund, make capital infusions, enter into capital support agreements or take other actions to ensure that the Fund maintains a NAV of $1.00 per share.

Other Investment Companies Risk

The Fund may invest in shares of other government money market funds. To the extent that the Fund invest in shares of other government money market funds, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund’s direct fees and expenses and will be subject to the risks associated with investments in those Funds.

Recent Market Events Risk

An outbreak of infectious respiratory illness caused by a novel coronavirus, known as COVID-19, was first detected in China in December 2019 and has subsequently spread globally. Transmission of COVID-19 and efforts to contain its spread have resulted, and may continue to result, in significant disruptions to business operations, widespread business closures and layoffs, travel restrictions, closed international, national and local borders, prolonged quarantines and stay-at-home orders, disruption of and delays in healthcare service preparation and delivery, service and event cancellations, and lower consumer demand, as well as general concern and uncertainty that has negatively affected the global economy. The impact of the COVID-19 pandemic may last for an extended period of time and may result in a sustained economic downturn or recession. The U.S. Federal Reserve and the U.S. federal government have taken numerous measures to address the economic impact of the COVID-19 pandemic and stimulate the U.S. economy. The ultimate effects of these and other efforts that may be taken may not be known for some time.

The pandemic has accelerated trends toward working remotely and shopping on-line, which may negatively affect the value of office and commercial real estate and companies that have been slow to transition to an on-line business model and has disrupted the supply chains that many businesses depend on. The travel, hospitality and public transit industries may suffer long-term negative effects from the pandemic and resulting changes to public behavior. Both U.S. and international markets have experienced significant volatility in recent months and years. As a result of such volatility, investment returns may fluctuate significantly. Moreover, the risks discussed herein associated with an investment in the Fund may be increased.

The Federal Reserve has spent hundreds of billions of dollars to keep credit flowing through the economy. However, the Federal Reserve recently began to reduce its interventions as the economy improved and inflation accelerated. Concerns about the markets’ dependence on the Federal Reserve’s provision of liquidity have grown as a result. High public debt in the U.S. and other countries creates ongoing systemic and market risks and

20

American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

policymaking uncertainty, and there may be a further increase in public debt due to the economic effects of the COVID-19 pandemic and ensuing economic relief and public health measures. Governments’ efforts to limit potential negative economic effects of the pandemic may be altered, delayed, or eliminated at inopportune times for political, policy or other reasons.

Interest rates have been unusually low in recent years in the U.S. and abroad, and central banks reduced rates further in an effort to combat the economic effects of the COVID-19 pandemic. Because there is little precedent for this situation, it is difficult to predict the impact on various markets of a significant rate increase or other significant policy changes. The U.S. Federal Reserve is anticipated to raise interest rates beginning in 2022, in part to address an increase in the annual inflation rate in the U.S. Over the longer term, rising interest rates may present a greater risk than has historically been the case due to the current period of relatively low rates and the effect of government fiscal and monetary policy initiatives and potential market reaction to those initiatives or their alteration or cessation.

Slowing global economic growth, risks associated with the United Kingdom’s departure from the European Union on December 31, 2020, commonly referred to as “Brexit,” and a trade agreement between the United Kingdom and the European Union, the risks associated with ongoing trade negotiations with China, the possibility of changes to some international trade agreements, tensions or open conflict between nations, such as between Russia and Ukraine, or political or economic dysfunction within some nations that are major producers of oil could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time.

Economists and others have expressed increasing concern about the potential effects of global climate change on property and security values. Certain issuers, industries and regions may be adversely affected by the impacts of climate change, including on the demand for and the development of goods and services and related production costs, and the impacts of legislation, regulation and international accords related to climate change, as well as any indirect consequences of regulation or business trends driven by climate change.

Redemption Risk

The Fund could experience a loss when selling securities to meet redemption requests by shareholders. The risk of loss increases if the redemption requests are unusually large or frequent or occur in times of overall market turmoil or declining prices.

Repurchase Agreement Risk

The obligations of a counterparty to a repurchase agreement are not guaranteed. The Fund permits various forms of securities as collateral whose values fluctuate and are issued or guaranteed by the U.S. Government. There are risks that a counterparty may default at a time when the collateral has declined in value, or a counterparty may become insolvent, which may affect the Fund’s right to control the collateral. Repurchase agreements are subject to credit risk.

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’’), FHLB, and the FFCB, 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. The rising U.S. national debt may lead to adverse impacts on the value of U.S. government securities due to potentially higher costs for the U.S. government to obtain new financing.

21

American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

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. A variable rate security has a coupon that is adjusted at pre-designated periods in response to changes in the market rate of interest on which the interest rate is based. 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 variable and floating-rate securities typically decrease. Alternatively, during periods of rising short-term interest rates, the coupons on variable and floating-rate securities typically increase. Changes in the coupons of variable and 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 variable and floating-rate securities may decline if their coupons do not rise as much, or as quickly, as interest rates in general. Conversely, variable and floating rate securities will not generally increase in value if interest rates decline. Certain types of variable and floating rate instruments may be subject to greater liquidity risk than other debt securities.

Yield and Securities Selection Risk

The yield paid by the Fund will vary and may be affected by the Manager’s decisions regarding the Fund’s dollar-weighted average maturity (“WAM”) and dollar-weighted average life (“WAL”). If the Manager sets the Fund’s maturity target in a manner that does not correlate with the movement of interest rate trends it could have an adverse effect on the Fund’s yield. Income from the Fund may be at rates less than inflation.

Offsetting Assets and Liabilities

The Fund is party to Master Repurchase Agreements (“Master Repo Agreements”) that govern transactions between the Fund and selected counterparties. The Master Repo Agreements contain provisions for, among other things, initiation, income payments, events of default, and maintenance of collateral for Repurchase Agreements. The Fund has elected not to offset qualifying financial instruments on the Statement of Assets and Liabilities, as such financial instruments are presented on a gross basis. The impacts of netting arrangements that provide the right to offset are detailed below, if applicable. The net amount represents the net receivable or payable that would be due from or to the counterparty in the event of default. Exposure from borrowings and other financing agreements such as repurchase agreements can only be netted across transactions governed by the same Master Repo Agreement with the same legal entity. All amounts reported below represent the balance as of the report date, December 31, 2021.

⁽¹⁾ Excess of collateral received from the individual counterparty is not shown for financial reporting purposes. Collateral with a value of $129,000,000 has been received in connection with these transactions.

6.  Federal Income and Excise Taxes

It is the policy of the Fund to qualify as a regulated investment company (“RIC”), by complying with all applicable provisions of Subchapter M of the Internal Revenue Code, as amended, and to make distributions of taxable income sufficient to relieve it from substantially all federal income and excise taxes. For federal income tax purposes, the Fund is treated as a single entity for the purpose of determining such qualification.

22

American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

The Fund does not have any unrecorded tax liabilities in the accompanying financial statements. Each of the tax years in the four year period ended December 31, 2021 remain subject to examination by the Internal Revenue Service. If applicable, the Fund recognizes interest accrued related to unrecognized tax benefits in interest expense and penalties in “Other expenses” on the Statement of Operations.

Dividends are categorized in accordance with income tax regulations which may treat certain transactions differently than U.S. GAAP. Accordingly, the character of distributions and composition of net assets for tax purposes may differ from those reflected in the accompanying financial statements.

The tax character of distributions paid were as follows:

* For tax purposes, short-term gains are considered ordinary income distributions.

As of December 31, 2021, the components of distributable earnings (deficits) on a tax basis were as follows:

Financial reporting records are adjusted for permanent book/tax differences to reflect tax character. Financial records are not adjusted for temporary differences. The temporary differences between financial reporting and tax-basis reporting of unrealized appreciation (depreciation) are attributable primarily to dividends payable.

Due to inherent differences in the recognition of income, expenses, and realized gains (losses) under U.S. GAAP and federal income tax regulations, permanent differences between book and tax reporting have been identified and appropriately reclassified on the Statement of Assets and Liabilities. Accordingly, the following amounts represent current year permanent differences derived from distributions in excess of current earnings as of December 31, 2021:

For federal income tax purposes, the Fund measures its capital loss carryforwards annually at December 31, its fiscal year end. Capital loss carryforwards retain their character as short-term and/or long-term and may be carried forward and applied against future realized capital gains with no expiration date.

As of December 31, 2021, the Fund did not have any capital loss carryforwards.

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American Beacon U.S. Government Money Market Select Fund^SM

Notes to Financial Statements

December 31, 2021

7.  Borrowing Arrangements

Effective November 11, 2021 (the “Effective Date”), the Fund, along with certain other funds managed by the Manager (“Participating Funds”), renewed a committed revolving line of credit (the “Committed Line”) agreement with State Street Bank and Trust Company (the “Bank”) to be used to facilitate portfolio liquidity. The maximum borrowing amount under the Committed Line is $100 million with interest at a rate equal to the higher of (a) Overnight Bank Funding Rate (“OBFR”) daily fluctuating rate per annum equal to 1.25% plus the sum of 0.10% or (b) the Federal Funds daily fluctuating rate per annum on amounts borrowed. Each of the Participating Funds paid a proportional amount of a quarterly commitment fee at a rate of 0.25% per annum on the unused portion of the Committed Line amount. The Committed Line expires November 10, 2022, unless extended by the Bank or terminated by the Participating Funds in accordance with the agreement. Prior to the Effective Date, the maximum borrowing amount under the Committed Line was $150 million with an expiration date November 10, 2021.

On the Effective Date, the Fund, along with certain other Participating Funds managed by the Manager, also renewed an uncommitted discretionary demand revolving line of credit (the “Uncommitted Line”) agreement with the Bank to be used to facilitate portfolio liquidity. The maximum borrowing amount under the Uncommitted Line is $100 million with interest at a rate equal to the higher of (a) OBFR daily fluctuating rate per annum equal to 1.25% plus the sum of 0.10% or (b) the Federal Funds daily fluctuating rate per annum on amounts borrowed on each outstanding loan. Each of the Participating Funds paid a proportional amount of a closing fee of $35,000 on the Effective Date. The Uncommitted Line expires November 10, 2022, unless extended by the Bank or terminated by the Participating Funds in accordance with the agreement. Prior to the Effective Date, the maximum borrowing amount under the Uncommitted Line was $50 million with an expiration date of November 10, 2021.

The Participating Funds paid administration, legal and arrangement fees, which are recognized as a component of “Loan expense” on the Statement of Operations, along with commitment fees, that have been allocated among the Participating Funds based on average daily net assets.

During the year ended December 31, 2021, the Fund did not utilize these facilities.

8.  Capital Share Transactions

The table below summarizes the activity in capital shares for the Fund Shares:

9.  Subsequent Events

Management has evaluated subsequent events for possible recognition or disclosure in the financial statements through the date the financial statements are issued. Management has determined that there are no material events that would require disclosure in the Fund’s financial statements through this date.

24

American Beacon U.S. Government Money Market Select Fund^SM

Financial Highlights

(For a share outstanding throughout the period)

See accompanying notes

25

American Beacon U.S. Government Money Market Select Fund^SM

Federal Tax Information

December 31, 2021 (Unaudited)

Certain tax information regarding the Fund are required to be provided to shareholders based upon the Fund’s income and distributions for the taxable year ended December 31, 2021. The information and distributions reported herein may differ from information and distributions taxable to the shareholders for the calendar year ended December 31, 2021.

The Fund designated the following items with regard to distributions paid during the fiscal year ended December 31, 2021. All designations are based on financial information available as of this annual report and, accordingly, are subject to change. For each item, it is the intention of the Fund to designate the maximum amount permitted under the Internal Revenue Code of 1986, as amended, and the regulations there under.

Long-Term Capital Gain Distributions:

Short-Term Capital Gain Distributions:

Of the ordinary dividends paid to the shareholders of the Fund during the tax year ended December 31, 2021, 30.28% were derived from U.S. Treasury Obligations.

Shareholders received notification in January 2022 of the applicable tax information necessary to prepare their 2021 income tax returns.

26

Trustees and Officers of the American Beacon Funds^SM (Unaudited)

The Trustees and officers of the American Beacon Select Funds (the “Trust”) are listed below, together with their principal occupations during the past five years. The address of each person listed below is 220 Las Colinas Boulevard East, Suite 1200, Irving, Texas 75039. Each Trustee oversees thirty funds in the fund complex that includes the Trust, the American Beacon Funds and the American Beacon Institutional Funds Trust. The Trust’s Statement of Additional Information contains additional information about the Trustees and is available without charge by calling 1-800-658-5811.

27

Trustees and Officers of the American Beacon Funds^SM (Unaudited)

28

Trustees and Officers of the American Beacon Funds^SM (Unaudited)

29

Trustees and Officers of the American Beacon Funds^SM (Unaudited)

30

Trustees and Officers of the American Beacon Funds^SM (Unaudited)

31

Trustees and Officers of the American Beacon Funds^SM (Unaudited)