Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionHennessy Advisors Inc
Latest Disclosed Ownership1,100 shares
Latest Disclosed Value $ 268,598
Hennessy Advisors Inc ownership in MPC / Marathon Petroleum Corporation

On April 21, 2026 - Hennessy Advisors Inc filed a 13F-HR form disclosing ownership of 1,100 shares of Marathon Petroleum Corporation (US:MPC) valued at $268,598 USD as of March 31, 2026. The entity filed a previous 13F-HR on April 16, 2025 disclosing 0 shares of Marathon Petroleum Corporation. The current value of the position is $293,931 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-21 2026-03-31 13F Marathon Pete COM 56585A102 1,100 1,100 269 0.0097
2025-04-16 2025-03-31 13F Marathon Petroleum COM 56585A102 0 -16,100 -100.00 0 -100.00
2025-01-15 2024-12-31 13F Marathon Petroleum COM 56585A102 16,100 -900 -5.29 2,246 -18.92 0.0668
2024-10-16 2024-09-30 13F Marathon Petroleum COM 56585A102 17,000 -400 -2.30 2,769 -8.25 0.0887
2024-07-23 2024-06-30 13F Marathon Petroleum COM 56585A102 17,400 -35,200 -66.92 3,019 -71.52 0.1142
2024-04-16 2024-03-31 13F Marathon Petroleum COM 56585A102 52,600 28,400 117.36 10,599 195.21 0.4463
2024-01-18 2023-12-31 13F MARATHON PETE COM 56585A102 24,200 0 0.00 3,590 -1.97 0.2672
2023-10-18 2023-09-30 13F MARATHON PETE COM 56585A102 24,200 0 0.00 3,662 29.81 0.2567
2023-07-17 2023-06-30 13F MARATHON PETE COM 56585A102 24,200 -4,400 -15.38 2,822 -26.84 0.2034
2023-04-14 2023-03-31 13F MARATHON PETE COM 56585A102 28,600 -93,900 -76.65 3,856 27,442.86 0.2839
2023-01-20 2022-12-31 13F MARATHON PETE COM 56585A102 122,500 -800 -0.65 14 -99.89 0.9367
2022-11-08 2022-09-30 13F MARATHON PETE COM 56585A102 123,300 1,400 1.15 12,247 22.21 0.8464
2022-08-12 2022-06-30 13F MARATHON PETE COM 56585A102 121,900 3,900 3.31 10,021 -0.67 0.5998
2022-05-12 2022-03-31 13F MARATHON PETE COM 56585A102 118,000 118,000 10,089 0.5288
2021-04-19 2021-03-31 13F MARATHON PETE COM 56585A102 0 -77,600 -100.00 0 -100.00
2021-01-25 2020-12-31 13F MARATHON PETE COM 56585A102 77,600 -4,700 -5.71 3,210 32.92 0.2062
2020-10-16 2020-09-30 13F MARATHON PETE COM 56585A102 82,300 -1,900 -2.26 2,415 -23.26 0.1680
2020-07-20 2020-06-30 13F MARATHON PETE COM 56585A102 84,200 -1,500 -1.75 3,147 55.48 0.2192
2020-04-14 2020-03-31 13F MARATHON PETE COM 56585A102 85,700 9,500 12.47 2,024 -55.91 0.1521
2020-01-14 2019-12-31 13F MARATHON PETE COM 56585A102 76,200 -3,600 -4.51 4,591 -5.30 0.2337
2019-10-07 2019-09-30 13F MARATHON PETE COM 56585A102 79,800 -2,200 -2.68 4,848 5.81 0.2436
2019-07-11 2019-06-30 13F MARATHON PETE COM 56585A102 82,000 0 0.00 4,582 -6.64 0.2196
2019-04-08 2019-03-31 13F MARATHON PETE COM 56585A102 82,000 800 0.99 4,908 2.42 0.2281
2019-01-14 2018-12-31 13F MARATHON PETE COM 56585A102 81,200 -2,800 -3.33 4,792 -28.66 0.2352
2018-10-10 2018-09-30 13F MARATHON PETE COM 56585A102 84,000 -56,200 -40.09 6,717 -31.71 0.2479
2018-07-20 2018-06-30 13F MARATHON PETE COM 56585A102 140,200 -3,700 -2.57 9,836 -6.51 0.3372
2018-05-02 2018-03-31 13F MARATHON PETE COM 56585A102 143,900 143,900 10,521 0.3535
2017-04-27 2017-03-31 13F MARATHON PETE COM 56585A102 0 -111,200 -100.00 0 -100.00
2017-01-17 2016-12-31 13F MARATHON PETE COM 56585A102 111,200 0 0.00 5,599 24.04 0.1661
2016-10-13 2016-09-30 13F MARATHON PETE COM 56585A102 111,200 -3,300 -2.88 4,514 3.87 0.1282
2016-08-04 2016-06-30 13F MARATHON PETE COM 56585A102 114,500 0 0.00 4,346 2.09 0.1317
2016-04-21 2016-03-31 13F MARATHON PETE COM 56585A102 114,500 58,800 105.57 4,257 47.45 0.1293
2016-01-22 2015-12-31 13F MARATHON PETE COM 56585A102 55,700 -2,000 -3.47 2,887 8.01 0.0903
2015-10-20 2015-09-30 13F MARATHON PETE COM 56585A102 57,700 1,300 2.30 2,673 -9.39 0.0804
2015-08-04 2015-06-30 13F MARATHON PETE COM 56585A102 56,400 27,400 94.48 2,950 -0.64 0.0884
2015-04-21 2015-03-31 13F MARATHON PETE COM 56585A102 29,000 4,100 16.47 2,969 32.13 0.0855
2015-01-22 2014-12-31 13F MARATHON PETE COM 56585A102 24,900 0 0.00 2,247 6.59 0.0636
2014-10-16 2014-09-30 13F MARATHON PETE COM 56585A102 24,900 -600 -2.35 2,108 5.88 0.0631
2014-07-15 2014-06-30 13F MARATHON PETE COM 56585A102 25,500 2,000 8.51 1,991 -2.64 0.0617
2014-04-24 2014-03-31 13F MARATHON PETE COM 56585A102 23,500 -2,100 -8.20 2,045 -12.90 0.0758
2014-01-22 2013-12-31 13F MARATHON PETE COM 56585A102 25,600 -700 -2.66 2,348 38.77 0.0958
2013-10-30 2013-09-30 13F MARATHON PETE COM 56585A102 26,300 -800 -2.95 1,692 -12.15 0.0765
2013-07-17 2013-06-30 13F MARATHON PETE COM 56585A102 27,100 27,100 1,926 0.0964
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.