X0306 4 2016-01-04 0 0000101778 MARATHON OIL CORP MRO 0001216408 PHELPS MICHAEL E J C/O MARATHON OIL CORPORATION 5555 SAN FELIPE ROAD HOUSTON TX 77056 1 0 0 0 Marathon Oil Corporation Common Stock 2016-01-04 4 A 0 13650.546 0.00 A 59796.819 D Marathon Oil Corporation Common Stock 2016-01-04 4 D 0 0.217 12.82 D 59796.602 D Non-Retainer Annual Director Stock Unit Award granted under Marathon Oil Corporation 2012 Incentive Compensation Plan. The annual non-retainer stock based compensation represented by these common stock units are credited to an unfunded account. These common stock units, along with their accrued dividend equivalent rights, will vest on January 4, 2019 and be payable in shares of common stock. Includes dividends of 1,335.221 shares previously not reported pursuant to Rule 16a-11. Funds received from Issuer for fractional Non-Retainer Annual Director Stock Units upon vesting of common stock units on January 4, 2016 and payable in whole shares of common stock. Sam A. Mazzu, Attorney-in-Fact for Michael E. J. Phelps 2016-01-05