September 10, 2018

VIA EDGAR

U.S. Securities and Exchange Commission

100 F St. N.E.

WASHINGTON, D.C. 20549

RE: American Beacon Funds (the “Registrant”)
(File Nos. 033-11387 and 811-04984)

Ladies and Gentlemen:

Enclosed for filing on behalf of American Beacon Funds (the “Trust”) pursuant to Rule 497(e) under the Securities Act of 1933, as amended, is an exhibit containing interactive data format risk/return summary information for the American Beacon Flexible Bond Fund, a separate series of the Trust. The exhibit reflects updated risk/return summary information for the Fund, as filed with the Securities and Exchange Commission pursuant to Rule 497(e) on August 23, 2018 (Accession Number: 0000809593-18-000044), which is incorporated herein by reference.

If you have any questions concerning the foregoing, please contact Rosemary K. Behan at (817) 391-6170.

Regards,

/s/ Rosemary K. Behan

Rosemary K. Behan

Vice President

American Beacon Funds

Attachment

cc: Kathy K. Ingber, Esq. K&L Gates LLP

 

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