The RBB Fund Trust

615 East Michigan Street

Milwaukee, Wisconsin 53202

September 8, 2025

VIA EDGAR TRANSMISSION

U.S. Securities and Exchange Commission

Department of Investment Management

100 F Street, N.E.

Washington, D.C. 20549

Dear Sir or Madam:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, and pursuant to the Investment Company Act of 1940, as amended, and the regulations thereunder, the Trust on behalf of its series, the Tweedy, Browne International Insider + Value ETF (the “Fund”), hereby certifies that the forms of Prospectus and Statement of Additional Information that would have been filed under Rule 497(b) or (c) would not have differed from those contained in the most recent amendment for the Fund dated August 25, 2025, and filed electronically on August 25, 2025 as Post-Effective Amendment No. 66 to the Trust’s Registration Statement on Form N-1A.

If you have any questions or require further information, do not hesitate to contact Edward Paz at edward.paz@usbank.com.

Sincerely,

THE RBB FUND TRUST

Chief Financial Officer, Chief Operating Officer, and Secretary