PCM
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Polymer Capital Management’s Marathon Petroleum MPC Stock Holding History

Polymer Capital Management’s Portfolio MPC Stock Details MPC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$405K Sell
1,583
-2,417
-60% -$593K 0.05% 455
2026
Q1 		$977K Sell
4,000
-13,258
-77% -$2.68M 0.1% 216
2025
Q4 		$2.81M Buy
17,258
+14,090
+445% +$2.63M 0.29% 69
2025
Q3 		$611K Buy
+3,168
New +$557K 0.06% 373

Other funds holding MPC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Raymond James Financial
Raymond James Financial St Petersburg, Florida $369B AUM 28.27% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

Polymer Capital Management's MPC Position: Q2 2026 in Review

Polymer Capital Management reduced its Marathon Petroleum (MPC) stake by 60% in Q2 2026, selling an estimated $593K and leaving 1,583 shares worth $405K. The position accounts for 0.05% of the portfolio, ranked #455.

Polymer Capital Management first reported a position in MPC in Q3 2025 and has held it in 4 quarters since. The position peaked at $2.81M in Q4 2025. 1,942 funds tracked by Wall St. Rank hold MPC as of Q2 2026.

  • Polymer Capital Management held 1,583 shares of Marathon Petroleum worth $405K as of Q2 2026.
  • Polymer Capital Management sold 2,417 Marathon Petroleum shares in Q2 2026, an estimated $593K.
  • Marathon Petroleum made up 0.05% of Polymer Capital Management's portfolio in Q2 2026, its #455 holding.
  • Polymer Capital Management first reported a position in Marathon Petroleum in Q3 2025 and has held it in 4 quarters since.
  • Polymer Capital Management's Marathon Petroleum position peaked at $2.81M in Q4 2025.
  • 1,942 funds tracked by Wall St. Rank held Marathon Petroleum as of Q2 2026.

Based on Polymer Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.