On October 1, 2018, Marathon Petroleum Corporation (“MPC”), a Delaware corporation, completed its acquisition of Andeavor through the merger of MPC’s wholly owned subsidiary, Mahi Inc., with and into Andeavor (the “First Merger”), with Andeavor surviving the First Merger as a wholly owned subsidiary of MPC and the subsequent merger of Andeavor with and into MPC’s wholly owned subsidiary, Andeavor LLC (f/k/a Mahi LLC) (the “Second Merger” and together with the First Merger, the “Merger”) with Andeavor LLC surviving the Second Merger as a wholly owned subsidiary of MPC.

Following the closing of the Merger, the sole member of MPLX GP LLC, the general partner of MPLX LP (the “General Partner”), appointed Gregory J. Goff to serve on the board of directors (the “Board”) of the General Partner. Mr. Goff is the former Chairman, President and Chief Executive Officer of Andeavor and the former Chairman of the Board of Directors and Chief Executive Officer of the general partner of Andeavor Logistics LP. As Mr. Goff serves as Executive Vice Chairman of MPC, he will not receive compensation for his services as a director. Mr. Goff is not expected to serve on any standing committees of the Board.