X0304 4 2012-01-03 0 0001510295 Marathon Petroleum Corp MPC 0001012779 DAVIS WILLIAM L C/O MARATHON PETROLEUM CORPORATION 539 S. MAIN STREET FINDLAY OH 45840 1 0 0 0 Common Stock 2012-01-03 4 A 0 1122.418 0.00 A 52206.865 D Common Stock 1000 I By Revocable Trust Includes 344.4850 shares acquired pursuant to dividend reinvestment and previously not reported pursuant to Rule 16a-11. Shares held by William L. Davis, not individually, but as trustee of the William L. Davis III Revocable Trust, or his successors in interest. The Reporting Person is the trustee and settlor of the William L. Davis III Revocable Trust pursuant to the William L. Davis III Revocable Trust Agreement dated June 5, 1992, as amended. /s/ Molly R. Benson, Attorney-in-Fact for William L. Davis 2012-01-05