MFS Active Exchange Traded Funds Trust

10/03/2025 | Press release | Distributed by Public on 10/03/2025 07:13

Prospectus Certification by Investment Company (Form 497J)

111 Huntington Avenue, Boston, Massachusetts 02199

617-954-5000

October 3, 2025

VIA EDGAR

United States Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Re: MFS® Active Exchange Traded Funds Trust (the "Trust") (File Nos. 333-278691 and 811-23953) on behalf of MFS® Blended Research® Core Equity ETF and MFS® Blended Research® International Equity ETF (the "Funds")

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, please accept this letter on behalf of the Trust as certification that the Prospectuses and the combined Statement of Additional Information for the Funds do not differ from those contained in Post-Effective Amendment No. 6 (the "Amendment") to the Trust's Registration Statement on Form N-1A. The Amendment was filed electronically on September 29, 2025.

Please call the undersigned at (617) 954-5843 or Jonathan Umana-Oliveira at (617) 954-5153 with any questions you may have.

Sincerely,

/S/BRIAN E. LANGENFELD

Brian E. Langenfeld

Vice President and Managing Counsel

MFS Active Exchange Traded Funds Trust published this content on October 03, 2025, and is solely responsible for the information contained herein. Distributed via SEC EDGAR on October 03, 2025 at 13:13 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]