Prospectus Certification by Investment Company (Form 497J)

American Beacon Advisors, Inc.

220 E. Las Colinas Blvd. Suite 1200

Irving, TX 75039

May 1, 2026

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 AHL Managed Futures Strategy Fund, American Beacon AHL TargetRisk Fund, American Beacon Man Large Cap Growth Fund, American Beacon Man Large Cap Value Fund, American Beacon Stephens Mid-Cap Growth Fund, and American Beacon Stephens Small Cap Growth Fund of the Registrant does not differ from that contained in Post-Effective Amendment No. 445 ("Amendment No. 445") to the Registrant's Registration Statement, (b) that the form of Statement of Additional Information used with respect to the American Beacon AHL Managed Futures Strategy Fund, American Beacon AHL TargetRisk Fund, American Beacon Man Large Cap Growth Fund, American Beacon Man Large Cap Value Fund, American Beacon Stephens Mid-Cap Growth Fund, and American Beacon Stephens Small Cap Growth Fund does not differ from that contained in Amendment No. 445 to the Registrant's Registration Statement, and (c) that Amendment No. 445 was filed electronically.

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