EXHIBIT NO. 99.(h) 2

August 31, 2026

State Street Bank and Trust
One Congress Street
Boston, MA 02114

Attention: Eruch Mody

Re: Addition of MFS Active Short Duration Income ETF and MFS Active Short Muni Bond ETF (each a “Portfolio” and collectively the “Portfolios”) to the Transfer Agency and Service Agreement between MFS Active Exchange Traded Funds Trust and State Street Bank and Trust Company

To Whom It May Concern:

In accordance with Section 11 (“Additional Portfolios”) of the Transfer Agency and Service Agreement dated as of September 6, 2024, as amended, modified, or supplemented from time to time (the “Agreement”), by and between MFS Active Exchange Traded Funds Trust (the “Trust”), and State Street Bank and Trust Company (“State Street”), the Trust hereby notifies State Street that it desires to have State Street act as Transfer Agent for the additional Portfolios identified above under the terms of the Agreement, and that Schedule A to the Agreement is hereby amended and restated as set forth on Appendix A attached hereto. In connection with such request, the Trust hereby confirms, as of the date hereof, its representations and warranties set forth in Section 4 of the Agreement to the extent applicable to each additional Portfolio.

Please indicate your acceptance of and agreement to the foregoing by executing this letter agreement and returning a copy to the Trust.

Sincerely,

MFS ACTIVE EXCHANGE TRADED FUNDS TRUST

On behalf of:

MFS Active Short Duration Income ETF

     MFS Active Short Muni Bond ETF

By: /s/DAVID L. DILORENZO

Name: David L. DiLorenzo

Title: President

Agreed and Accepted:

STATE STREET BANK AND TRUST COMPANY

By: /s/ERUCH MODY

Name: Eruch Mody

Title: Senior Managing Director

Effective Date: August 31, 2026