American Beacon Advisors, Inc.

220 E. Las Colinas Blvd. Suite 1200

Irving, TX 75039

December 31, 2025

VIA EDGAR

---------

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 SiM High Yield Opportunities Fund, American Beacon The London Company Income Equity Fund, American Beacon Ninety One Emerging Markets Equity Fund, American Beacon Ninety One Global Franchise Fund, American Beacon Ninety One International Franchise Fund and American Beacon DoubleLine Floating Rate Income Fund, of the Registrant does not differ from that contained in Post-Effective Amendment No. 437 ("Amendment No. 437") to the Registrant's Registration Statement, (b) that the form of Statement of Additional Information used with respect to the American Beacon SiM High Yield Opportunities Fund, American Beacon The London Company Income Equity Fund, American Beacon Ninety One Emerging Markets Equity Fund, American Beacon Ninety One Global Franchise Fund, American Beacon Ninety One International Franchise Fund and American Beacon DoubleLine Floating Rate Income Fund, does not differ from that contained in Amendment No. 437 to the Registrant's Registration Statement, and (c) that Amendment No. 437 was filed electronically.

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