On February 20, 2023, Patricia K. Collawn notified Equitrans Midstream Corporation (the Company) that she will not stand for re-election to the Company's Board of Directors at the Company's 2023 annual meeting of shareholders, scheduled to be held on April 25, 2023, at 9:00 a.m. (ET) (the 2023 Annual Meeting). Ms. Collawn's determination not to stand for re-election was not the result of any disagreement with the Company or any of its affiliates on any matter relating to the Company's operations, policies or practices. In addition to currently serving on the Board, Ms. Collawn sits on the boards of two other public companies, including PNM Resources Inc. (PNM) where she serves as Chairman and Chief Executive Officer.

Ms. Collawn will continue to serve as a member of the Board and on the Board's Human Capital and Compensation and Health, Safety, Sustainability and Environmental committees until the 2023 Annual Meeting, when her current term will expire.