Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionFirst National Trust Co
Latest Disclosed Ownership33,267 shares
Latest Disclosed Value $ 8,123,136
First National Trust Co reports 0.02% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 7, 2026 - First National Trust Co filed a 13F-HR form disclosing ownership of 33,267 shares of Marathon Petroleum Corporation (MX:MPC) valued at $8,123,136 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 33,272 shares of Marathon Petroleum Corporation. This represents a change in shares of -0.02% 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)
2026-05-07 2026-03-31 13F MARATHON PETE COM 56585A102 33,267 -5 -0.02 8,123 50.12 0.1504
2026-02-09 2025-12-31 13F MARATHON PETE COM 56585A102 33,272 5 0.02 5,411 -15.60 0.1804
2025-11-06 2025-09-30 13F MARATHON PETE COM 56585A102 33,267 0 0.00 6,412 16.04 0.2196
2025-08-01 2025-06-30 13F MARATHON PETE COM 56585A102 33,267 0 0.00 5,526 14.01 0.2066
2025-05-08 2025-03-31 13F MARATHON PETE COM 56585A102 33,267 -298 -0.89 4,847 3.50 0.1953
2025-02-10 2024-12-31 13F MARATHON PETE COM 56585A102 33,565 0 0.00 4,682 -14.37 0.1758
2024-11-05 2024-09-30 13F MARATHON PETE COM 56585A102 33,565 -4 -0.01 5,468 -6.10 0.2113
2024-08-02 2024-06-30 13F MARATHON PETE COM 56585A102 33,569 302 0.91 5,824 -13.13 0.2396
2024-04-26 2024-03-31 13F MARATHON PETE COM 56585A102 33,267 0 0.00 6,703 35.83 0.2722
2024-02-06 2023-12-31 13F MARATHON PETE COM 56585A102 33,267 107 0.32 4,935 -1.65 0.2167
2023-11-06 2023-09-30 13F MARATHON PETE COM 56585A102 33,160 -50 -0.15 5,018 29.60 0.2395
2023-08-01 2023-06-30 13F MARATHON PETE COM 56585A102 33,210 -50 -0.15 3,872 -13.65 0.1794
2023-04-26 2023-03-31 13F MARATHON PETE COM 56585A102 33,260 100 0.30 4,484 16.20 0.2385
2023-02-02 2022-12-31 13F MARATHON PETE COM 56585A102 33,160 225 0.68 3,859 17.94 0.2040
2022-11-02 2022-09-30 13F MARATHON PETE COM 56585A102 32,935 25 0.08 3,272 20.96 0.1908
2022-08-03 2022-06-30 13F MARATHON PETE COM 56585A102 32,910 0 0.00 2,705 -3.87 0.1522
2022-05-03 2022-03-31 13F MARATHON PETE COM 56585A102 32,910 780 2.43 2,814 36.87 0.1458
2022-02-03 2021-12-31 13F MARATHON PETE COM 56585A102 32,130 50 0.16 2,056 3.68 0.1080
2021-11-05 2021-09-30 13F MARATHON PETE COM 56585A102 32,080 -216 -0.67 1,983 1.64 0.1185
2021-08-06 2021-06-30 13F MARATHON PETE COM 56585A102 32,296 216 0.67 1,951 13.69 0.1186
2021-05-06 2021-03-31 13F MARATHON PETE COM 56585A102 32,080 0 0.00 1,716 29.31 0.1124
2021-02-10 2020-12-31 13F MARATHON PETE COM 56585A102 32,080 0 0.00 1,327 41.02 0.0915
2020-11-04 2020-09-30 13F MARATHON PETE COM 56585A102 32,080 -500 -1.53 941 -22.68 0.0732
2020-08-06 2020-06-30 13F MARATHON PETE COM 56585A102 32,580 0 0.00 1,217 58.05 0.1028
2020-04-29 2020-03-31 13F MARATHON PETE COM 56585A102 32,580 16,874 107.44 770 -18.69 0.0769
2020-02-04 2019-12-31 13F MARATHON PETE COM 56585A102 15,706 800 5.37 947 4.53 0.0769
2019-11-01 2019-09-30 13F MARATHON PETE COM 56585A102 14,906 -2,265 -13.19 906 -5.62 0.0814
2019-07-22 2019-06-30 13F MARATHON PETE COM 56585A102 17,171 -1,114 -6.09 960 -12.25 0.0895
2019-04-25 2019-03-31 13F MARATHON PETE COM 56585A102 18,285 1,881 11.47 1,094 13.02 0.1094
2019-01-28 2018-12-31 13F MARATHON PETE COM 56585A102 16,404 4,586 38.81 968 2.43 0.1079
2018-10-31 2018-09-30 13F MARATHON PETE COM 56585A102 11,818 -485 -3.94 945 9.50 0.0962
2018-07-30 2018-06-30 13F MARATHON PETE COM 56585A102 12,303 64 0.52 863 -3.58 0.0951
2018-04-30 2018-03-31 13F MARATHON PETE COM 56585A102 12,239 -90 -0.73 895 10.09 0.1019
2018-01-17 2017-12-31 13F MARATHON PETE COM 56585A102 12,329 60 0.49 813 18.17 0.0894
2017-11-06 2017-09-30 13F MARATHON PETE COM 56585A102 12,269 14 0.11 688 7.33 0.0798
2017-08-07 2017-06-30 13F MARATHON PETE COM 56585A102 12,255 121 1.00 641 4.57 0.0784
2017-05-09 2017-03-31 13F MARATHON PETE COM 56585A102 12,134 -350 -2.80 613 -2.39 0.0795
2017-01-30 2016-12-31 13F MARATHON PETE COM 56585A102 12,484 4,158 49.94 628 85.80 0.0885
2016-11-02 2016-09-30 13F MARATHON PETE COM 56585A102 8,326 28 0.34 338 7.30 0.0509
2016-07-27 2016-06-30 13F MARATHON PETE COM 56585A102 8,298 -2,037 -19.71 315 -17.97 0.0483
2016-05-09 2016-03-31 13F MARATHON PETE COM 56585A102 10,335 509 5.18 384 -24.56 0.0588
2016-02-03 2015-12-31 13F MARATHON PETE COM 56585A102 9,826 -630 -6.03 509 5.17 0.0806
2015-11-09 2015-09-30 13F MARATHON PETE COM 56585A102 10,456 -629 -5.67 484 -16.41 0.0831
2015-07-20 2015-06-30 13F MARATHON PETE COM 56585A102 11,085 5,555 100.45 579 2.30 0.0930
2015-05-08 2015-03-31 13F MARATHON PETE COM 56585A102 5,530 5,530 0.00 566 0.0967
2015-01-28 2014-12-31 13F MARATHON PETE COM 56585A102 0 -4,442 -100.00 0 -100.00
2014-11-06 2014-09-30 13F MARATHON PETE COM 56585A102 4,442 33 0.75 376 9.30 0.0711
2014-08-08 2014-06-30 13F MARATHON PETE COM 56585A102 4,409 1,011 29.75 344 16.22 0.0663
2014-05-07 2014-03-31 13F MARATHON PETE COM 56585A102 3,398 143 4.39 296 -0.67 0.0529
2014-02-04 2013-12-31 13F MARATHON PETE COM 56585A102 3,255 155 5.00 298 35.45 0.0543
2013-08-09 2013-06-30 13F MARATHON PETE COM 56585A102 3,100 3,100 220 0.0451
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.