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Polaris Capital Management, LLC

Position in MPC — Marathon Petroleum Corp

CIK 1316926 BOSTON, MA

Position in MPC

as of Jun 30, 2026 · filed Jul 27, 2026
Position Value
$23,900,542
-$14,150,515 QoQ
Shares Held
93,482
-40.0% QoQ
Ownership
0.033%
of shares outstanding
% of Portfolio
2.30%
of 13F equity value
Holder Rank
#170
of 1,926 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in MPC Over Time

Shares Held

Position Value (USD)

Position in Oil & Gas Refining & Marketing

Energy · as of Jun 30, 2026

Polaris Capital Management, LLC holds $25,745,722 across 2 Oil & Gas Refining & Marketing names. MPC ranks #1 (92.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 MPC
Marathon Petroleum Corp
This page
93,482 $23,900,542

All Filings in MPC

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $23,900,542 93,482
2026-03-31 $38,051,057 155,832
2025-12-31 $26,660,261 163,932
2025-09-30 $37,455,549 194,332
2025-06-30 $29,539,673 177,832
2025-03-31 $27,321,537 187,532
2024-12-31 $29,433,663 210,994
2024-09-30 $34,454,487 211,494
2024-06-30 $36,533,847 210,594
2024-03-31 $43,865,341 217,694
2023-12-31 $42,711,953 287,894
2023-09-30 $45,083,277 297,894
2023-06-30 $41,683,800 357,494
2023-03-31 $48,591,923 360,394
2022-12-31 $42,179,037 362,394
2022-09-30 $71,209,081 716,894
2022-06-30 $2,856,386 34,745
2022-03-31 $63,825,237 746,494
2021-12-31 $70,331,025 1,099,094
2021-09-30 $74,832,996 1,210,694
2021-06-30 $73,295,139 1,213,094
2021-03-31 $64,332,102 1,202,694
2020-12-31 $43,345,031 1,047,994
2020-09-30 $30,152,541 1,027,694
2020-06-30 $33,991,278 909,344
2020-03-31 $20,803,173 880,744