X0306 4 2023-02-27 0001747009 Equitrans Midstream Corp ETRN 0001784163 Pietrandrea Brian P. 2200 ENERGY DRIVE CANONSBURG PA 15317 1 VP and CAO Common Stock 2023-02-27 4 A 0 1713 6.11 A 31064 D Common Stock 2023-02-27 4 F 0 523 6.11 D 30541 D Common Stock 2023-02-27 4 A 0 27180 6.21 A 57721 D On February 27, 2023, performance awards under the Company's 2020 Performance Share Unit Program (2020 PSUP) vested and were paid in Company common stock. Includes an aggregate of 722 shares purchased since the last applicable report through the Equitrans Midstream Corporation Employee Stock Purchase Plan. The Company, consistent with its practice, withheld shares to satisfy the tax liability associated with the vesting of the awards under the 2020 PSUP. Restricted common stock award that vests completely on January 1, 2026. /s/ Lisa M. Lind, Attorney-in-Fact for Brian P. Pietrandrea 2023-03-01