Marathon Petroleum
MPC
1,940 hedge funds and large institutions have $55.9B invested in Marathon Petroleum in 2026 Q2 according to their latest regulatory filings, with 171 funds opening new positions, 683 increasing their positions, 713 reducing their positions, and 93 closing their positions.
84% more first-time investments, than exits
New positions opened: 171 | Existing positions closed: 93
48% more call options, than puts
Call options by funds: $834M | Put options by funds: $564M
3% more funds holding
Funds holding: 1,892 → 1,940 (+48)
4% more capital invested
Capital invested by funds: $53.9B → $55.9B (+$1.96B)
0.2% less ownership
Funds ownership: 75.04% → 74.84% (-0.2%)
4% less repeat investments, than reductions
Existing positions increased: 683 | Existing positions reduced: 713
35% less funds holding in top 10
Funds holding in top 10: 26 → 17 (-9)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$396M |
| 2 |
Victory Capital Management
San Antonio,
Texas
|
+$146M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
+$138M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$137M |
| 5 |
Geode Capital Management
Boston,
Massachusetts
|
+$130M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Harris Associates
Chicago,
Illinois
|
-$633M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$586M |
| 3 |
Boston Partners
Boston,
Massachusetts
|
-$524M |
| 4 |
JP Morgan Chase
New York
|
-$172M |
| 5 |
Canada Pension Plan Investment Board
Toronto Ontario,
Ontario, Canada
|
-$150M |
MPC Hedge Fund Activity: Q2 2026 in Review
1,940 of the 8,279 institutional investors tracked by Wall St. Rank reported a position in Marathon Petroleum (MPC) for Q2 2026, worth a combined $55.9B — up 3.6% from $53.9B a quarter earlier.
Buyers outnumbered sellers: 171 funds opened new MPC positions and 93 closed out — a net gain of 78 holders — while 683 added to existing stakes and 713 trimmed.
The largest buyer was BlackRock, adding an estimated $396M. The largest seller was Harris Associates, cutting an estimated $633M.
- 1,940 institutional investors held Marathon Petroleum (MPC) as of Q2 2026, up from 1,892 in Q1 2026.
- Funds reported $55.9B of Marathon Petroleum stock for Q2 2026, up 3.6% quarter-over-quarter.
- 171 funds opened new Marathon Petroleum positions in Q2 2026 and 93 closed out, a net change of +78 holders.
- The largest Marathon Petroleum buyer in Q2 2026 was BlackRock, an estimated $396M added.
- The largest Marathon Petroleum seller in Q2 2026 was Harris Associates, an estimated $633M sold.
Based on aggregated 13F filings for Q2 2026.