MPC Marathon Petroleum Corporation
Marathon Petroleum Corporation (MPC) Institutional Ownership
What the institutions did with MPC last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| CX Institutional | 39.5K | 37.4% |
| Stonebridge Financial Group, LLC | 17.2K | 16.3% |
| PARK NATIONAL CORP /OH/ | 16.7K | 15.9% |
| NEVILLE RODIE & SHAW INC | 6.4K | 6.1% |
| Coastline Trust Co | 4.2K | 4.0% |
| Rosenberg Matthew Hamilton | 4.0K | 3.8% |
| FERGUSON WELLMAN CAPITAL MANAGEMENT, INC | 3.3K | 3.1% |
| BAKER TILLY WEALTH MANAGEMENT, LLC | 2.4K | 2.2% |
| Silverleafe Capital Partners, LLC | 2.0K | 1.9% |
| EASTERN BANK | 1.9K | 1.8% |
| Versant Capital Management, Inc | 1.7K | 1.6% |
| PRIVATE CLIENT SERVICES, LLC | 1.2K | 1.2% |
| MassMutual Private Wealth & Trust, FSB | 1.2K | 1.1% |
| ROCKLAND TRUST CO | 1.1K | 1.0% |
| Montecito Bank & Trust | 762 | 0.7% |
| Ballew Advisors, Inc | 627 | 0.6% |
| Central Pacific Bank - Trust Division | 580 | 0.5% |
| GoalVest Advisory LLC | 262 | 0.2% |
| Hickory Point Bank & Trust | 182 | 0.2% |
| Polaris Financial Partners | 177 | 0.2% |
| Roxbury Financial LLC | 16 | 0.0% |
| Planning Strategies Inc. | 12 | 0.0% |
| Noble Wealth Management PBC | 3 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CX Institutional | Increased | 16.3K | 39.5K | +23.2K |
| ROCKLAND TRUST CO | New | 0 | 1.1K | +1.1K |
| FERGUSON WELLMAN CAPITAL MANAGEMENT, INC | Reduced | 4.3K | 3.3K | -999 |
| Montecito Bank & Trust | New | 0 | 762 | +762 |
| Ballew Advisors, Inc | New | 0 | 627 | +627 |
| BAKER TILLY WEALTH MANAGEMENT, LLC | Reduced | 2.6K | 2.4K | -271 |
| PARK NATIONAL CORP /OH/ | Reduced | 16.9K | 16.7K | -135 |
| MassMutual Private Wealth & Trust, FSB | Reduced | 1.3K | 1.2K | -113 |
| Versant Capital Management, Inc | Increased | 1.6K | 1.7K | +78 |
| GoalVest Advisory LLC | Reduced | 305 | 262 | -43 |
| EASTERN BANK | Increased | 1.9K | 1.9K | +39 |
| Stonebridge Financial Group, LLC | Increased | 17.2K | 17.2K | +26 |
| Planning Strategies Inc. | Increased | 8 | 12 | +4 |
| Noble Wealth Management PBC | New | 0 | 3 | +3 |
| PRIVATE CLIENT SERVICES, LLC | Increased | 1.2K | 1.2K | +1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.