Prospectus Certification by Investment Company (Form 497J)

American Beacon Advisors, Inc.

220 E. Las Colinas Blvd. Suite 1200

Irving, TX 75039

February 24, 2026

VIA EDGAR

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Ladies and Gentlemen:

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 DoubleLine Floating Rate Fund (formerly known as the American Beacon Floating Rate Income Fund) and the American Beacon DoubleLine Select Income Fund of the Registrant does not differ from that contained in Post-Effective Amendment No. 442 ("Amendment No. 442") to the Registrant's Registration Statement, (b) that the form of Statement of Additional Information used with respect to the American Beacon DoubleLine Floating Rate Fund and the American Beacon DoubleLine Select Income Fund of the Registrant does not differ from that contained in Post-Effective Amendment No. 442, and (c) that Amendment No. 442 was filed electronically.

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