Equitrans Midstream (ETRN) - 2021 Q4 - Annual Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2021 or FOR THE TRANSITION PERIOD FROM ___________ TO __________ COMMISSION FILE NUMBER 001-38629 EQUITRANS MIDSTREAM CORPORATION (Exact name of registrant as specified in its charter) Pennsylvania 83-0516635 (Sta ...