At special meetings, shareholders of both Marathon Petroleum Corp. and Andeavor voted to approve the strategic combination of MPC and Andeavor. MPC shareholders approved the issuance of shares of MPC common stock and Andeavor shareholders approved the adoption of the previously announced agreement and plan of merger.

MPC's proposal to issue shares in connection with the transaction was supported by approximately 98 percent of votes cast, representing approximately 73 percent of MPC's outstanding shares. Andeavor's proposal to approve the transaction was supported by approximately 99 percent of votes cast, representing approximately 74 percent of Andeavor's outstanding shares.

"We are pleased that the shareholders of both companies voted overwhelmingly in support of this transaction," said MPC Chairman and Chief Executive Officer Gary R. Heminger. "As we look forward, we remain focused on the tremendous potential this combination will bring our shareholders and are excited to begin executing our strategy to transform our company and realize our expected synergies."

Also at the MPC special meeting, MPC's proposal to increase the size of its board of directors by two members was not approved.

MPC and Andeavor expect the closing of the transaction to occur on Oct. 1, 2018, subject to customary closing conditions.

About Marathon Petroleum Corporation

MPC (NYSE: MPC) is the nation's second-largest refiner, with a crude oil refining capacity of approximately 1.9 million barrels per calendar day in its six-refinery system. Marathon brand gasoline is sold through approximately 5,600 independently owned retail outlets across 20 states and the District of Columbia. In addition, Speedway LLC, an MPC subsidiary, owns and operates the nation's second-largest convenience store chain, with approximately 2,740 convenience stores in 22 states. MPC owns, leases or has ownership interests in approximately 10,800 miles of crude oil and light product pipelines. Through subsidiaries, MPC owns the general partner of MPLX LP ("MPLX"), a midstream master limited partnership. Through MPLX, MPC has ownership interests in gathering and processing facilities with approximately 5.9 billion cubic feet per day of gathering capacity, 8.7 billion cubic feet per day of natural gas processing capacity and 610,000 barrels per day of fractionation capacity. MPC's fully integrated system provides operational flexibility to move crude oil, natural gas liquids, feedstocks and petroleum-related products efficiently through the company's distribution network and midstream service businesses in the Midwest, Northeast, East Coast, Southeast and Gulf Coast regions.

About Andeavor

Andeavor (NYSE: ANDV) is a premier, highly integrated marketing, logistics and refining company. Andeavor's retail-marketing system includes approximately 3,330 stations marketed under multiple well-known fuel brands, including ARCO®, SUPERAMERICA®, Shell®, Exxon(TM), Mobil(TM), Tesoro®, USA Gasoline(TM) and Giant®. It also has ownership in Andeavor Logistics LP (NYSE: ANDX) and its non-economic general partner. Andeavor operates 10 refineries with a combined capacity of approximately 1.2 million barrels per day in the mid-continent and western United States.