Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionTrexquant Investment LP
Latest Disclosed Ownership96,305 shares
Latest Disclosed Value $ 23,515,755
Trexquant Investment LP reports 306.90% increase in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Trexquant Investment LP filed a 13F-HR form disclosing ownership of 96,305 shares of Marathon Petroleum Corporation (US:MPC) valued at $23,515,755 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 23,668 shares of Marathon Petroleum Corporation. This represents a change in shares of 306.90% during the quarter. The current value of the position is $25,733,659 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MARATHON PETE COM 56585A102 96,305 72,637 306.90 23,516 510.94 0.1690
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 23,668 -77,251 -76.55 3,849 -80.21 0.0343
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 100,919 100,919 19,451 0.2002
2025-05-14 2025-03-31 13F MARATHON PETE COM 56585A102 0 -11,626 -100.00 0 -100.00
2025-02-12 2024-12-31 13F MARATHON PETE COM 56585A102 11,626 11,626 1,622 0.0189
2024-05-14 2024-03-31 13F MARATHON PETE COM 56585A102 0 -154,563 -100.00 0 -100.00
2024-02-09 2023-12-31 13F MARATHON PETE COM 56585A102 154,563 45,307 41.47 22,931 38.68 0.5160
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 109,256 102,319 1,474.97 16,535 1,946.29 0.4148
2023-08-11 2023-06-30 13F MARATHON PETE COM 56585A102 6,937 6,937 809 0.0212
2023-05-15 2023-03-31 13F MARATHON PETE COM 56585A102 0 -129,333 -100.00 0 -100.00
2023-02-13 2022-12-31 13F MARATHON PETE COM 56585A102 129,333 59,878 86.21 15,053 118.19 0.4268
2022-11-14 2022-09-30 13F MARATHON PETE COM 56585A102 69,455 -129,840 -65.15 6,899 -57.89 0.2426
2022-08-11 2022-06-30 13F MARATHON PETE COM 56585A102 199,295 199,295 16,384 0.7341
2022-02-11 2021-12-31 13F MARATHON PETE COM 56585A102 0 -47,046 -100.00 0 -100.00
2021-11-12 2021-09-30 13F MARATHON PETE COM 56585A102 47,046 47,046 2,908 0.2311
2020-05-08 2020-03-31 13F MARATHON PETE COM 56585A102 0 -211,757 -100.00 0 -100.00
2020-02-12 2019-12-31 13F MARATHON PETE COM 56585A102 211,757 211,757 12,758 0.7547
2019-05-13 2019-03-31 13F MARATHON PETE COM 56585A102 0 -151,733 -100.00 0 -100.00
2019-02-13 2018-12-31 13F MARATHON PETE COM 56585A102 151,733 84,456 125.53 8,954 66.43 0.5597
2018-11-09 2018-09-30 13F MARATHON PETE COM 56585A102 67,277 7,444 12.44 5,380 28.16 0.4045
2018-08-07 2018-06-30 13F MARATHON PETE COM 56585A102 59,833 59,833 4,198 0.2909
2018-05-03 2018-03-31 13F MARATHON PETE COM 56585A102 0 -67,527 -100.00 0 -100.00
2018-02-08 2017-12-31 13F MARATHON PETE COM 56585A102 67,527 35,148 108.55 4,455 145.32 0.4891
2017-11-09 2017-09-30 13F MARATHON PETE COM 56585A102 32,379 -6,221 -16.12 1,816 -10.10 0.4575
2017-08-01 2017-06-30 13F MARATHON PETE COM 56585A102 38,600 8,300 27.39 2,020 31.94 0.5529
2017-05-08 2017-03-31 13F MARATHON PETE COM 56585A102 30,300 24,100 388.71 1,531 390.71 0.1964
2017-02-10 2016-12-31 13F MARATHON PETE COM 56585A102 6,200 -62,700 -91.00 312 -88.85 0.0494
2016-11-10 2016-09-30 13F MARATHON PETE COM 56585A102 68,900 68,900 2,797 0.6244
2016-08-10 2016-06-30 13F MARATHON PETE COM 56585A102 0 -76,500 -100.00 0 -100.00
2016-05-11 2016-03-31 13F MARATHON PETE COM 56585A102 76,500 46,767 157.29 2,844 84.56 0.3332
2016-02-10 2015-12-31 13F MARATHON PETE COM 56585A102 29,733 -73,167 -71.10 1,541 -67.67 0.1357
2015-11-02 2015-09-30 13F MARATHON PETE COM 56585A102 102,900 102,900 0.00 4,767 0.4103
2015-08-12 2015-06-30 13F MARATHON PETE COM 56585A102 0 -21,000 -100.00 0 -100.00
2015-05-13 2015-03-31 13F MARATHON PETE COM 56585A102 21,000 21,000 2,150 0.2195
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.