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MPC · Marathon Petroleum Corp

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$363.25 +0.98 (+0.27%)
Market Cap
$102.40B
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: 1,930
Total Value: $56,927,808,028
Total Shares: 222,667,741

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,930 13F filers · Δ vs Mar 31, 2026
Top Holder
11.7%
Sep 2023 → Jun 2026 · range 10.8% – 17.0%
+0.9 pts
Top 5
39.3%
Sep 2023 → Jun 2026 · range 38.0% – 42.5%
+1.2 pts
Top 10
50.3%
Sep 2023 → Jun 2026 · range 47.3% – 54.8%
−0.3 pts
HHI
394
Sep 2023 → Jun 2026 · range 381 – 537
Broadly held+14

Quarterly Activity

vs Mar 31, 2026
New
171
Increased
683
Decreased
706
Sold Out
141
Unchanged
370
Holder count: +30
Institutional value: +3.3%
Shares held: -1.3%

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 1,985
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1510295 CUSIP 56585A102 13F (30d) 1334 filings 1313 filers Visit website Investor relations