| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2013-02-11 | Marathon Petroleum Corp | MPLX LP | 54,008,030 | 71.6% | EDGAR |
| SC 13G/A | 2013-01-11 | BlackRock Inc. | Marathon Petroleum Corp | 34,422,404 | 10.2% | EDGAR |
| SC 13G/A | 2012-12-06 | BlackRock Inc. | Marathon Petroleum Corp | 33,958,280 | 10.0% | EDGAR |
| SC 13G | 2012-02-14 | FMR LLC | Marathon Petroleum Corp | 18,379,912 | 5.2% | EDGAR |
| SC 13D/A | 2012-02-10 | JANA PARTNERS LLC | Marathon Petroleum Corp | 16,024,622 | - | EDGAR |
| SC 13G | 2012-02-09 | BlackRock Inc. | Marathon Petroleum Corp | 26,467,054 | 7.4% | EDGAR |
| SC 13D | 2012-01-19 | JANA PARTNERS LLC | Marathon Petroleum Corp | 19,702,322 | - | EDGAR |