Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionEasterly Investment Partners Llc
Latest Disclosed Ownership39,968 shares
Latest Disclosed Value $ 9,769,965
Easterly Investment Partners Llc reports 27.96% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 11, 2026 - Easterly Investment Partners Llc filed a 13F-HR form disclosing ownership of 39,968 shares of Marathon Petroleum Corporation (US:MPC) valued at $9,759,386 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 55,483 shares of Marathon Petroleum Corporation. This represents a change in shares of -27.96% during the quarter. The current value of the position is $10,679,849 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)
2026-05-11 2026-03-31 13F MARATHON PETE COM 56585A102 39,968 -15,515 -27.96 9,770 8.27 0.7475
2026-02-10 2025-12-31 13F MARATHON PETE COM 56585A102 55,483 -81 -0.15 9,023 -15.74 0.5538
2025-11-12 2025-09-30 13F MARATHON PETE COM 56585A102 55,564 -5,822 -9.48 10,709 5.03 0.7245
2025-07-29 2025-06-30 13F MARATHON PETE COM 56585A102 61,386 -1,177 -1.88 10,197 11.87 0.7312
2025-05-02 2025-03-31 13F MARATHON PETE COM 56585A102 62,563 -176 -0.28 9,115 4.14 0.7587
2025-02-12 2024-12-31 13F MARATHON PETE COM 56585A102 62,739 5,744 10.08 8,752 -5.74 0.6873
2024-11-01 2024-09-30 13F MARATHON PETE COM 56585A102 56,995 -3,080 -5.13 9,285 -10.90 0.7443
2024-07-25 2024-06-30 13F MARATHON PETE COM 56585A102 60,075 -1,183 -1.93 10,422 -15.57 0.9158
2024-05-03 2024-03-31 13F MARATHON PETE COM 56585A102 61,258 1,330 2.22 12,343 38.84 0.9431
2024-02-14 2023-12-31 13F MARATHON PETE COM 56585A102 59,928 -85 -0.14 8,891 -2.11 0.9507
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 60,013 9,896 19.75 9,082 55.43 0.9993
2023-11-13 2023-06-30 13F MARATHON PETE COM 56585A102 50,117 -172 -0.34 5,844 -13.82 0.5172
2023-11-13 2023-03-31 13F/A-1 MARATHON PETE COM 56585A102 50,289 -71,347 -58.66 6,780 -52.11 0.5967
2023-05-02 2023-03-31 13F MARATHON PETE COM 56585A102 70,388 -51,248 9,490 0.6559
2023-11-13 2022-12-31 13F/A-1 MARATHON PETE COM 56585A102 121,636 -8,363 -6.43 14,157 9.63 1.2227
2023-02-10 2022-12-31 13F MARATHON PETE COM 56585A102 75,171 -54,828 8,749 0.8690
2022-11-09 2022-09-30 13F MARATHON PETE COM 56585A102 129,999 -11,666 -8.23 12,913 10.88 1.2355
2022-08-10 2022-06-30 13F MARATHON PETE COM 56585A102 141,665 -107,216 -43.08 11,646 -45.27 1.0375
2022-05-13 2022-03-31 13F MARATHON PETROLEUM COM 56585A102 248,881 -57,241 -18.70 21,280 8.64 1.6101
2022-08-02 2021-12-31 13F/A-1 MARATHON PETE COM 56585A102 306,122 -17,078 -5.28 19,588 -1.95 1.4291
2022-02-08 2021-12-31 13F MARATHON PETE COM 56585A102 215,752 -107,448 13,806 1.0300
2021-11-16 2021-09-30 13F/A-1 MARATHON PETE COM 56585A102 323,200 308,752 2,136.99 19,977 2,188.32 1.3542
2021-11-01 2021-09-30 13F MARATHON PETE COM 56585A102 14,448 0 893 0.1080
2021-07-27 2021-06-30 13F/A-1 MARATHON PETE COM 56585A102 14,448 -169 -1.16 873 11.64 0.1024
2021-05-11 2021-03-31 13F MARATHON PETE COM 56585A102 14,617 -5,174 -26.14 782 -4.52 0.0936
2021-02-16 2020-12-31 13F MARATHON PETE COM 56585A102 19,791 -794,521 -97.57 819 -96.57 0.1132
2020-11-16 2020-09-30 13F MARATHON PETE COM 56585A102 814,312 803,049 7,129.97 23,892 5,575.06 0.9480
2020-08-14 2020-06-30 13F MARATHON PETE CORP COM COM 56585A102 11,263 11,263 421 0.0191
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.