Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAdams Natural Resources Fund, Inc.
Latest Disclosed Ownership85,012 shares
Latest Disclosed Value $ 20,758,230
Adams Natural Resources Fund, Inc. reports 8.21% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 22, 2026 - Adams Natural Resources Fund, Inc. filed a 13F-HR form disclosing ownership of 85,012 shares of Marathon Petroleum Corporation (MX:MPC) valued at $20,758,230 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 92,612 shares of Marathon Petroleum Corporation. This represents a change in shares of -8.21% 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)
2026-04-22 2026-03-31 13F Marathon Petroleum COM 56585A102 85,012 -7,600 -8.21 20,758 37.83 2.4064
2026-02-13 2025-12-31 13F Marathon Petroleum COM 56585A102 92,612 -19,900 -17.69 15,061 -30.55 2.2843
2025-10-22 2025-09-30 13F Marathon Petroleum COM 56585A102 112,512 8,200 7.86 21,686 25.15 3.2900
2025-08-26 2025-06-30 NP Marathon Petroleum EC 56585A102 104,312 0 0.00 17,327 0.00 0.0273
2025-07-30 2025-06-30 13F Marathon Petroleum COM 56585A102 104,312 -1,300 -1.23 17,327 12.62 2.7453
2025-05-23 2025-03-31 NP Marathon Petroleum EC 56585A102 105,612 84,411 398.15 15,387 2,589.86 2.2494
2025-04-23 2025-03-31 13F Mosaic COM 56585A102 21,201 -87,611 -80.52 573 -96.23 0.0842
2025-02-28 2024-12-31 NP Marathon Petroleum EC 56585A102 108,812 0 0.00 15,179 0.00 2.3854
2025-02-11 2024-12-31 13F Marathon Petroleum COM 56585A102 108,812 -30,500 -21.89 15,179 -33.12 2.3982
2024-11-25 2024-09-30 NP Marathon Petroleum EC 56585A102 139,312 0 0.00 22,695 0.00 3.3306
2024-10-25 2024-09-30 13F Marathon Petroleum COM 56585A102 139,312 -28,500 -16.98 22,695 -22.04 3.3607
2024-08-28 2024-06-30 NP Marathon Petroleum EC 56585A102 167,812 0 0.00 29,112 0.00 4.2192
2024-08-01 2024-06-30 13F Marathon Petroleum COM 56585A102 167,812 0 0.00 29,112 -13.91 4.2482
2024-05-30 2024-03-31 NP Marathon PetroleumCorp. EC 56585A102 167,812 0 0.00 33,814 0.00 4.7445
2024-04-24 2024-03-31 13F Marathon Petroleum COM 56585A102 167,812 0 0.00 33,814 35.82 4.7692
2024-02-28 2023-12-31 NP Marathon PetroleumCorp. EC 56585A102 167,812 0 0.00 24,897 0.00 3.9303
2024-02-12 2023-12-31 13F Marathon Petroleum COM 56585A102 167,812 -5,500 -3.17 24,897 -5.08 3.9489
2023-11-21 2023-09-30 NP Marathon Petroleum EC 56585A102 173,312 0 0.00 26,229 0.00 3.8672
2023-10-25 2023-09-30 13F Marathon Petroleum COM 56585A102 173,312 -11,400 -6.17 26,229 21.79 3.8973
2023-08-25 2023-06-30 NP Marathon Petroleum EC 56585A102 184,712 0 0.00 21,537 0.00 3.4684
2023-08-01 2023-06-30 13F Marathon Petroleum COM 56585A102 184,712 -15,700 -7.83 21,537 -20.30 3.4947
2023-05-26 2023-03-31 NP Marathon Petroleum EC 56585A102 200,412 0 0.00 27,022 0.00 4.3086
2023-04-26 2023-03-31 13F Marathon Petroleum COM 56585A102 200,412 -18,973 -8.65 27,022 5.82 4.3432
2023-02-28 2022-12-31 NP Marathon Petroleum EC 56585A102 219,385 0 0.00 25,534 0.00 3.9200
2023-02-03 2022-12-31 13F Marathon Petroleum COM 56585A102 219,385 -14,700 -6.28 25,534 9.82 0.0039
2022-11-21 2022-09-30 NP Marathon Petroleum EC 56585A102 234,085 0 0.00 23,252 0.00 4.2072
2022-10-26 2022-09-30 13F Marathon Petroleum COM 56585A102 234,085 -13,900 -5.61 23,252 14.06 4.2429
2022-08-26 2022-06-30 NP Marathon Petroleum EC 56585A102 247,985 0 0.00 20,387 0.00 3.7095
2022-07-27 2022-06-30 13F Marathon Petroleum COM 56585A102 247,985 0 0.00 20,387 -3.84 3.7360
2022-05-27 2022-03-31 NP Marathon Petroleum EC 56585A102 247,985 0 0.00 21,203 0.00 3.5458
2022-04-27 2022-03-31 13F Marathon Petroleum COM 56585A102 247,985 -22,500 -8.32 21,203 22.50 3.5754
2022-02-28 2021-12-31 NP Marathon Petroleum EC 56585A102 270,485 0 0.00 17,308 0.00 3.6780
2022-02-11 2021-12-31 13F Marathon Petroleum COM 56585A102 270,485 2,500 0.93 17,308 4.49 3.7054
2021-11-29 2021-09-30 NP Marathon Petroleum EC 56585A102 267,985 0 0.00 16,564 0.00 3.8097
2021-10-27 2021-09-30 13F Marathon Petroleum COM 56585A102 267,985 0 0.00 16,564 2.30 3.8366
2021-08-30 2021-06-30 NP Marathon Petroleum EC 56585A102 267,985 0 0.00 16,192 -0.01 3.6318
2021-07-23 2021-06-30 13F Marathon Petroleum COM 56585A102 267,985 6,600 2.53 16,192 15.81 3.6525
2021-05-28 2021-03-31 NP Marathon Petroleum EC 56585A102 261,385 0 0.00 13,981 0.00 0.0343
2021-04-23 2021-03-31 13F Marathon Petroleum COM 56585A102 261,385 52,400 25.07 13,981 61.76 3.4440
2021-02-25 2020-12-31 NP Marathon Petroleum EC 56585A102 208,985 0 0.00 8,644 -0.01 0.0260
2021-02-12 2020-12-31 13F Marathon Petroleum COM 56585A102 208,985 2,500 1.21 8,644 42.69 2.6163
2020-11-25 2020-09-30 NP Marathon Petroleum EC 56585A102 206,485 0 0.00 6,058 0.00 0.0220
2020-10-20 2020-09-30 13F Marathon Petroleum COM 56585A102 206,485 -73,600 -26.28 6,058 -42.13 2.2086
2020-08-28 2020-06-30 NP Marathon Petroleum EC 56585A102 280,085 0 0.00 10,470 -0.01 0.0271
2020-07-23 2020-06-30 13F Marathon Petroleum COM 56585A102 280,085 48,900 21.15 10,470 91.76 2.7256
2020-06-01 2020-03-31 NP Marathon Petroleum EC 56585A102 231,185 0 0.00 5,461 -0.02 0.0180
2020-04-16 2020-03-31 13F Marathon Petroleum COM 56585A102 231,185 -57,600 -19.95 5,461 -68.61 1.8303
2020-02-28 2019-12-31 NP Marathon Petroleum EC 56585A102 288,785 0 0.00 17,399 0.00 0.0310
2020-01-31 2019-12-31 13F Marathon Petroleum COM 56585A102 288,785 98,400 51.68 17,399 50.45 3.1172
2019-11-20 2019-09-30 NP Marathon Petroleum EC 56585A102 190,385 0 0.00 11,566 -0.01 0.0208
2019-10-28 2019-09-30 13F Marathon Petroleum COM 56585A102 190,385 -63,700 -25.07 11,566 -18.54 2.0926
2019-07-29 2019-06-30 13F Marathon Petroleum COM 56585A102 254,085 -101,700 -28.58 14,198 -33.32 2.4333
2019-04-26 2019-03-31 13F Marathon Petroleum COM 56585A102 355,785 0 0.00 21,294 1.42 3.6080
2019-02-14 2018-12-31 13F Marathon Petroleum COM 56585A102 355,785 199,685 127.92 20,995 68.19 4.0349
2018-10-29 2018-09-30 13F Marathon Petroleum COM 56585A102 156,100 77,100 97.59 12,483 125.20 1.8272
2018-07-26 2018-06-30 13F Marathon Petroleum COM 56585A102 79,000 0 0.00 5,543 -4.03 0.8120
2018-04-27 2018-03-31 13F Marathon Petroleum COM 56585A102 79,000 79,000 0.00 5,776 4.20 0.9308
2017-10-30 2017-09-30 13F MARATHON PETE COM 56585A102 0 -289,400 -100.00 0 -100.00
2017-07-21 2017-06-30 13F MARATHON PETE COM 56585A102 289,400 0 0.00 15,144 3.54 2.4855
2017-04-28 2017-03-31 13F MARATHON PETE COM 56585A102 289,400 0 0.00 14,626 0.38 2.2388
2017-02-14 2016-12-31 13F MARATHON PETE COM 56585A102 289,400 -63,500 -17.99 14,571 8.77 2.1694
2016-10-24 2016-09-30 13F MARATHON PETE COM 56585A102 352,900 0 0.00 13,396 0.00 2.1059
2016-07-22 2016-06-30 13F MARATHON PETE COM 56585A102 352,900 88,300 33.37 13,396 36.17 2.1059
2016-04-25 2016-03-31 13F MARATHON PETE COM 56585A102 264,600 0 0.00 9,838 -28.28 1.6627
2016-02-10 2015-12-31 13F MARATHON PETE COM 56585A102 264,600 0 0.00 13,717 11.89 2.3777
2015-11-02 2015-09-30 13F MARATHON PETE COM 56585A102 264,600 0 0.00 12,259 -11.43 2.1072
2015-07-24 2015-06-30 13F MARATHON PETE COM 56585A102 264,600 132,300 100.00 13,841 2.18 1.9403
2015-05-08 2015-03-31 13F MARATHON PETE COM 56585A102 132,300 0 0.00 13,546 13.44 1.8642
2015-02-11 2014-12-31 13F MARATHON PETE COM 56585A102 132,300 0 0.00 11,941 6.60 1.5838
2014-10-21 2014-09-30 13F MARATHON PETE COM 56585A102 132,300 22,300 20.27 11,202 30.44 1.2527
2014-07-31 2014-06-30 13F MARATHON PETROLEUM COM 56585A102 110,000 0 0.00 8,588 -10.30 0.8875
2014-04-23 2014-03-31 13F MARATHON PETROLEUM COM 56585A102 110,000 -80,000 -42.11 9,574 -21.66 1.0949
2013-10-18 2013-09-30 13F MARATHON PETROLEUM COM 56585A102 190,000 0 0.00 12,221 -9.48 1.4778
2013-08-14 2013-06-30 13F MARATHON PETROLEUM COM 56585A102 190,000 190,000 13,501 1.7639
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.