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MPC · Marathon Petroleum Corp

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Market Cap
$109.21B
Shares
280.82M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,938
Total Value: $57,053,351,710
Total Shares: 223,158,779
Showing 1–100 of 1,993 holdings by value · page 1 of 20

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,938 13F filers · Δ vs Mar 31, 2026
Top Holder
11.7%
Sep 2023 → Jun 2026 · range 10.8% – 17.0%
+0.8 pts
Top 5
39.2%
Sep 2023 → Jun 2026 · range 38.0% – 42.5%
+1.1 pts
Top 10
50.2%
Sep 2023 → Jun 2026 · range 47.3% – 54.8%
−0.4 pts
HHI
393
Sep 2023 → Jun 2026 · range 381 – 537
Broadly held+12

Quarterly Activity

vs Mar 31, 2026
New
174
Increased
685
Decreased
710
Sold Out
138
Unchanged
369
Holder count: +36
Institutional value: +3.6%
Shares held: -1.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 1,993
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1510295 CUSIP 56585A102 13F (30d) 900 filings 857 filers Visit website Investor relations