Marathon Petroleum Corporation
MPCLast close · Oct 16, 2026478.07+1.15 (+0.24%)
Market cap$134.3B
Of the 85 managers this site tracks, 4 held Marathon Petroleum (MPC) at the end of Q3 2026, their latest 13Fs. The largest position by value was Bridgewater's, $89.3M; Bill Nygren's ($58.6M) and Mairs & Power's ($355,381) follow. No Schedule 13D or 13G is on file for MPC from the activists and large holders the site follows.
Superinvestors holding MPC
| Manager | Firm | Quarter | Shares | Value |
|---|---|---|---|---|
| Bridgewater | Bridgewater Associates, LP | Q2 2026 | 349,224 | $89.3M |
| Bill Nygren | Harris Associates L P | Q2 2026 | 229,011 | $58.6M |
| Mairs & Power | Mairs & Power Inc | Q2 2026 | 1,390 | $355,381 |
| David Katz | Matrix Asset Advisors Inc | Q3 2026 | 854 | $337,689 |
13D/13G are SEC beneficial-ownership disclosures, triggered only above 5%; a 13F is a quarterly snapshot filed up to 45 days after quarter end. Superinvestor names link to their full portfolios under Investors.