MFS Active Exchange Traded Funds Trust

10/15/2026 | Press release | Distributed by Public on 10/15/2026 06:43

Prospectus by Investment Company (Form 497)

SUPPLEMENT TO THE PROSPECTUS

Supplement dated October 15, 2026, to the Prospectus dated June 26, 2026.

MFS® Active Value ETF

Effective November 1, 2026, the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information" is restated in its entirety as follows:

Portfolio Manager(s)

Portfolio Manager

Since

Title

Thomas Crowley

2024

Investment Officer of MFS

Steven Gorham

November 2026

Investment Officer of MFS

Effective November 1, 2026, the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Management of the Fund" is restated in its entirety as follows:

Portfolio Manager(s)

Information regarding the portfolio manager(s) of the fund is set forth below. Further information regarding the portfolio manager(s), including other accounts managed, compensation, ownership of fund shares, and possible conflicts of interest, is available in the fund's SAI.

Portfolio Manager

Primary Role

Five Year History

Thomas Crowley

Portfolio Manager

Employed in the investment area of MFS since 2007

Steven Gorham

Portfolio Manager

Employed in the investment area of MFS since 1992

EVE-SUP-I-101526

1

MFS Active Exchange Traded Funds Trust published this content on October 15, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on October 15, 2026 at 12:43 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 If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]