Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionHm Payson & Co
Latest Disclosed Ownership245,189 shares
Latest Disclosed Value $ 59,870,174
Hm Payson & Co reports 19.07% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 13, 2026 - Hm Payson & Co filed a 13F-HR form disclosing ownership of 245,189 shares of Marathon Petroleum Corporation (MX:MPC) valued at $59,870,174 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 302,970 shares of Marathon Petroleum Corporation. This represents a change in shares of -19.07% during the quarter.

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)
2026-04-13 2026-03-31 13F MARATHON PETE COM 56585A102 245,189 -57,781 -19.07 59,870 21.51 0.4488
2026-02-12 2025-12-31 13F MARATHON PETE COM 56585A102 302,970 -13,018 -4.12 49,272 -19.10
2025-10-17 2025-09-30 13F MARATHON PETE COM 56585A102 315,988 -4,958 -1.54 60,904 14.24 0.8757
2025-10-17 2025-06-30 13F MARATHON PETE COM 56585A102 320,946 -51,049 -13.72 53,312 -1.63 0.8443
2025-04-29 2025-03-31 13F MARATHON PETE COM 56585A102 371,995 20,049 5.70 54,196 10.39 0.9511
2025-02-07 2024-12-31 13F MARATHON PETE COM 56585A102 351,946 -94,471 -21.16 49,097 -32.49 0.8328
2024-10-28 2024-09-30 13F MARATHON PETE COM 56585A102 446,417 -15,808 -3.42 72,726 -9.30 1.2472
2024-08-13 2024-06-30 13F MARATHON PETE COM 56585A102 462,225 84,952 22.52 80,187 5.48 1.4567
2024-06-20 2024-03-31 13F MARATHON PETE COM 56585A102 377,273 -63,178 -14.34 76,020 16.34 1.4127
2024-02-13 2023-12-31 13F MARATHON PETE COM 56585A102 440,451 24,753 5.95 65,345 3.87 1.3532
2023-11-06 2023-09-30 13F MARATHON PETE COM 56585A102 415,698 5,232 1.27 62,912 31.45 1.4748
2023-07-17 2023-06-30 13F MARATHON PETE COM 56585A102 410,466 353,610 621.94 47,860 524.40 1.0746
2023-04-18 2023-03-31 13F MARATHON PETE COM 56585A102 56,856 -700 -1.22 7,666 14.44 0.1838
2023-02-06 2022-12-31 13F MARATHON PETE COM 56585A102 57,556 -308 -0.53 6,699 16.53 0.1668
2022-10-25 2022-09-30 13F MARATHON PETE COM 56585A102 57,864 -497 -0.85 5,748 19.80 0.1578
2022-08-15 2022-06-30 13F MARATHON PETE COM 56585A102 58,361 -37 -0.06 4,798 -3.91 0.1230
2022-05-12 2022-03-31 13F MARATHON PETE COM 56585A102 58,398 -39 -0.07 4,993 33.54 0.1136
2022-02-15 2021-12-31 13F MARATHON PETE COM 56585A102 58,437 -6,600 -10.15 3,739 -6.99 0.0813
2021-11-30 2021-09-30 13F MARATHON PETE COM 56585A102 65,037 0 0.00 4,020 2.29 0.0979
2021-08-17 2021-06-30 13F MARATHON PETE COM 56585A102 65,037 -573 -0.87 3,930 12.00 0.0958
2021-06-15 2021-03-31 13F MARATHON PETE COM 56585A102 65,610 -4,225 -6.05 3,509 21.50 0.0934
2021-03-10 2020-12-31 13F MARATHON PETE COM 56585A102 69,835 -1,056 -1.49 2,888 38.85 0.0798
2020-12-21 2020-09-30 13F MARATHON PETE COM 56585A102 70,891 -3,017 -4.08 2,080 -24.72 0.0641
2020-08-13 2020-06-30 13F MARATHON PETE COM 56585A102 73,908 -277 -0.37 2,763 57.71 0.0927
2020-07-01 2020-03-31 13F MARATHON PETE COM 56585A102 74,185 -12,269 -14.19 1,752 -66.37 0.0688
2020-02-18 2019-12-31 13F MARATHON PETE COM 56585A102 86,454 -425 -0.49 5,209 -1.31 0.1673
2019-11-12 2019-09-30 13F MARATHON PETE COM 56585A102 86,879 -4,424 -4.85 5,278 3.45 0.1859
2019-08-15 2019-06-30 13F MARATHON PETE COM 56585A102 91,303 -490 -0.53 5,102 -7.14 0.1830
2019-07-31 2019-03-31 13F MARATHON PETE COM 56585A102 91,793 91,793 5,494 0.2100
2019-02-15 2018-12-31 13F MARATHON PETE COMMON STOCK 56585A102 0 -88,971 -100.00 0 -100.00
2018-11-30 2018-09-30 13F MARATHON PETE COMMON STOCK 56585A102 88,971 -4,895 -5.21 7,115 8.03 0.3185
2018-08-27 2018-06-30 13F MARATHON PETE COMMON STOCK 56585A102 93,866 -125 -0.13 6,586 -4.16 0.2814
2018-05-14 2018-03-31 13F MARATHON PETE COMMON STOCK 56585A102 93,991 -623 -0.66 6,872 10.08 0.2835
2018-02-16 2017-12-31 13F MARATHON PETE COMMON STOCK 56585A102 94,614 -81 -0.09 6,243 17.55 0.2509
2017-11-06 2017-09-30 13F MARATHON PETE COMMON STOCK 56585A102 94,695 -5,562 -5.55 5,311 1.22 0.2284
2017-08-04 2017-06-30 13F MARATHON PETE COMMON STOCK 56585A102 100,257 -1,352 -1.33 5,247 2.16 0.2365
2017-05-25 2017-03-31 13F MARATHON PETE COMMON STOCK 56585A102 101,609 -348 -0.34 5,136 0.04 0.2342
2017-02-15 2016-12-31 13F MARATHON PETE COMMON STOCK 56585A102 101,957 -1,134 -1.10 5,134 22.68 0.2446
2016-11-14 2016-09-30 13F MARATHON PETE COMMON STOCK 56585A102 103,091 -1,056 -1.01 4,185 5.87 0.2042
2016-08-08 2016-06-30 13F MARATHON PETE COMMON STOCK 56585A102 104,147 -2,304 -2.16 3,953 -0.13 0.1973
2016-05-19 2016-03-31 13F MARATHON PETE COMMON STOCK 56585A102 106,451 -400 -0.37 3,958 -28.54 0.2058
2016-02-23 2015-12-31 13F MARATHON PETE COMMON STOCK 56585A102 106,851 765 0.72 5,539 12.70 0.2847
2015-11-02 2015-09-30 13F MARATHON PETE COMMON STOCK 56585A102 106,086 -9,576 -8.28 4,915 -18.76 0.2664
2015-08-11 2015-06-30 13F MARATHON PETE COMMON STOCK 56585A102 115,662 57,398 98.51 6,050 1.41 0.3011
2015-05-06 2015-03-31 13F MARATHON PETE COMMON STOCK 56585A102 58,264 -2,147 -3.55 5,966 9.43 0.2982
2015-02-10 2014-12-31 13F MARATHON PETE COMMON STOCK 56585A102 60,411 -1,350 -2.19 5,452 4.26 0.2699
2014-11-12 2014-09-30 13F MARATHON PETE COMMON STOCK 56585A102 61,761 -3,232 -4.97 5,229 3.05 0.2679
2014-08-13 2014-06-30 13F MARATHON PETE COMMON STOCK 56585A102 64,993 -1,145 -1.73 5,074 -11.86 0.2607
2014-05-07 2014-03-31 13F MARATHON PETE COMMON STOCK 56585A102 66,138 -71,392 -51.91 5,757 -54.37 0.3047
2014-02-10 2013-12-31 13F MARATHON PETE COMMON STOCK 56585A102 137,530 5,576 4.23 12,616 48.65 0.6758
2013-11-13 2013-09-30 13F MARATHON PETE COMMON STOCK 56585A102 131,954 76,849 139.46 8,487 116.73 0.4921
2013-08-13 2013-06-30 13F MARATHON PETE COMMON STOCK 56585A102 55,105 55,105 3,916 0.2351
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.