MPLX LP accepted resignations from Donald C. Templin and Pamela K.M. Beall, each a Management Director who retired from the Marathon Group during 2021. The resignations will be effective December 31, 2021. On November 29, 2021, the board of managers of MPC Investment LLC, the sole member of the General Partner, appointed John J. Quaid to serve as a member of the Board, effective January 1, 2022, and fixed the size of the Board at nine members, effective as of the same date. Mr. Quaid is not expected to serve on any standing committees of the Board. Mr. Quaid currently serves as the General Partner's Executive Vice President and Chief Financial Officer. As a Management Director.