MPLX(MPLX) - 2021 Q4 - Annual Report

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) Commission file number 001-35714 MPLX LP (Exact name of registrant as specified in its charter) Delaware 27-0005456 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 200 E. Hardin Street, Findlay, OH 45840-3229 ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ☐ TRAN ...