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Cost Basis Information

Marathon Petroleum Corporation merger with Andeavor  – October 1, 2018

On October 1, 2018, Marathon Petroleum Corporation acquired all of the outstanding shares of Andeavor common stock. Pursuant to the Agreement and Plan of Merger, Andeavor stockholders could make an election for each outstanding share of Andeavor common stock to be cancelled in exchange for either $152.27 of cash or 1.87 shares of MPC common stock.


Marathon Petroleum Corporation spin-off from Marathon Oil Corporation  - June 30, 2011

On June 30, 2011, Marathon Petroleum Corporation became an independent company following a spin-off from Marathon Oil Corporation. The holders of Marathon Oil Corporation common stock received one share of Marathon Petroleum Corporation common stock for every two shares of Marathon Oil Corporation common stock held on June 27, 2011. Cost basis information related to the spin-off.