American Beacon Advisors, Inc.

220 E. Las Colinas Blvd. Suite 1200

Irving, TX 75039

November 5, 2025

VIA EDGAR

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Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Dear Sir or Madam:

Pursuant to Rule 497(j) of the Securities Act of 1933, as amended, American Beacon Funds (the "Registrant") hereby certifies (a) that the form of Prospectus used with respect to the American Beacon Shapiro Equity Opportunities Fund, American Beacon Shapiro SMID Cap Equity Fund, American Beacon SSI Alternative Income Fund, American Beacon ARK Transformational Innovation Fund, American Beacon TwentyFour Strategic Income Fund, and American Beacon TwentyFour Short Term Bond Fund of the Registrant does not differ from that contained in Post-Effective Amendment No. 434 ("Amendment No. 434") to the Registrant's Registration Statement, (b) that the form of Statement of Additional Information used with respect to the American Beacon Shapiro Equity Opportunities Fund, American Beacon Shapiro SMID Cap Equity Fund, American Beacon SSI Alternative Income Fund, American Beacon ARK Transformational Innovation Fund, American Beacon TwentyFour Strategic Income Fund, and American Beacon TwentyFour Short Term Bond Fund of the Registrant does not differ from that contained in Amendment No. 434 to the Registrant's Registration Statement, and (c) that Amendment No. 434 was filed electronically.

If you have any questions concerning the foregoing, please do not hesitate to contact the undersigned at (817) 391-6170.