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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.

New
Increased
Maintained
Reduced
Closed

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)

Holders
1,940
Holders Change
+48
Holders Change %
+2.54%
% of All Funds
23.43%
Holding in Top 10
17
Holding in Top 10 Change
-9
Holding in Top 10 Change %
-34.62%
% of All Funds
0.21%
New
171
Increased
683
Reduced
713
Closed
93
Calls
$834M
Puts
$564M
Net Calls
+$270M
Net Calls Change
+$39.9M

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$396M
2
Victory Capital Management
Victory Capital Management
Texas
+$146M
3
American Century Companies
American Century Companies
Missouri
+$138M
4
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
+$137M
5
Geode Capital Management
Geode Capital Management
Massachusetts
+$130M

Top Sellers

Rank Fund Capital Flow
1
Harris Associates
Harris Associates
Illinois
-$633M
2
Wellington Management Group
Wellington Management Group
Massachusetts
-$586M
3
Boston Partners
Boston Partners
Massachusetts
-$524M
4
JP Morgan Chase
JP Morgan Chase
New York
-$172M
5
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board
Ontario, Canada
-$150M
Name Holding Trade Value Shares
Change 		Change in
Stake
Sumitomo Mitsui Trust Group
51
Sumitomo Mitsui Trust Group
Japan
$162M -$2.77M -11,277 -2%
Vanguard Asset Management
52
Vanguard Asset Management
$162M +$15.6M +63,728 +11%
RhumbLine Advisers
53
RhumbLine Advisers
Massachusetts
$157M -$810K -3,300 -0.5%
California Public Employees Retirement System
54
California Public Employees Retirement System
California
$157M +$19M +77,517 +14%
Fifth Third Bancorp
55
Fifth Third Bancorp
Ohio
$152M -$652K -2,655 -0.4%
PAM
56
Panagora Asset Management
Massachusetts
$149M +$7.36M +29,974 +5%
Mariner
57
Mariner
Kansas
$144M +$1.38M +5,622 +1%
Squarepoint
58
Squarepoint
New York
$142M +$45.3M +184,592 +50%
Citigroup
59
Citigroup
New York
$142M +$3.7M +15,067 +3%
HSBC Holdings
60
HSBC Holdings
United Kingdom
$140M +$13.8M +56,200 +11%
Canada Pension Plan Investment Board
61
Canada Pension Plan Investment Board
Ontario, Canada
$131M -$150M -610,078 -54%
Bank of Montreal
62
Bank of Montreal
Ontario, Canada
$124M -$11M -44,657 -8%
Federated Hermes
63
Federated Hermes
Pennsylvania
$120M +$20.2M +82,484 +21%
Millennium Management
64
Millennium Management
New York
$116M +$5.63M +22,946 +5%
LPL Financial
65
LPL Financial
California
$113M +$4.25M +17,311 +4%
Thrivent Financial for Lutherans
66
Thrivent Financial for Lutherans
Minnesota
$112M +$427K +1,741 +0.4%
Natixis Advisors
67
Natixis Advisors
Massachusetts
$110M +$8.52M +34,720 +9%
Franklin Resources
68
Franklin Resources
California
$109M +$6.63M +26,991 +7%
Citadel Advisors
69
Citadel Advisors
Florida
$105M +$51.6M +210,192 +104%
ECP
70
Empyrean Capital Partners
California
$101M -$614K -2,500 -0.6%
Los Angeles Capital Management
71
Los Angeles Capital Management
California
$98M -$29.1M -118,495 -24%
Acadian Asset Management
72
Acadian Asset Management
Massachusetts
$95.9M -$38.2M -155,562 -29%
Robeco Institutional Asset Management
73
Robeco Institutional Asset Management
Netherlands
$93.5M +$3.21M +13,078 +4%
Envestnet Asset Management
74
Envestnet Asset Management
Illinois
$91.9M -$1.55M -6,331 -2%
AllianceBernstein
75
AllianceBernstein
Tennessee
$90.5M +$296K +1,205 +0.3%
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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.