Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionComerica Bank
Latest Disclosed Ownership68,912 shares
Latest Disclosed Value $ 11,207,126
Comerica Bank reports 6.33% decrease in ownership of MPC / Marathon Petroleum Corporation

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 68,912 shares of Marathon Petroleum Corporation (MX:MPC) valued at $11,207,126 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 73,567 shares of Marathon Petroleum Corporation. This represents a change in shares of -6.33% 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)
2026-01-29 2025-12-31 13F MARATHON PETE COM 56585A102 68,912 -4,655 -6.33 11,207 -20.96 0.0447
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 73,567 -8,722 -10.60 14,179 3.74 0.0533
2025-08-14 2025-06-30 13F MARATHON PETE COM 56585A102 82,289 -6,099 -6.90 13,669 6.14 0.0531
2025-05-14 2025-03-31 13F MARATHON PETE COM 56585A102 88,388 -5,659 -6.02 12,877 -1.84 0.0541
2025-02-14 2024-12-31 13F/A-1 MARATHON PETE COM 56585A102 94,047 4,103 4.56 13,120 -10.46 0.0529
2025-02-14 2024-12-31 13F MARATHON PETE COM 56585A102 94,047 4,103 13,120 0.0439
2024-11-14 2024-09-30 13F MARATHON PETE COM 56585A102 89,944 -908 -1.00 14,653 -7.04 0.0580
2024-08-15 2024-06-30 13F MARATHON PETE COMMON 56585A102 90,852 -8,350 -8.42 15,761 -21.15 0.0656
2024-05-16 2024-03-31 13F MARATHON PETE COMMON 56585A102 99,202 -2,037 -2.01 19,989 33.09 0.0861
2024-02-14 2023-12-31 13F MARATHON PETE COMMON 56585A102 101,239 -5,742 -5.37 15,020 -7.23 0.0692
2023-11-21 2023-09-30 13F MARATHON PETE COMMON 56585A102 106,981 -371,210 -77.63 16,191 0.0843
2023-08-22 2023-06-30 13F MARATHON PETE EQU 56585A102 478,191 404,367 547.74 0 -100.00 0.0064
2023-01-26 2022-12-31 13F MARATHON PETE COM 56585A102 73,824 -5,174 -6.55 9 -99.91 0.0699
2022-10-28 2022-09-30 13F MARATHON PETE COM 56585A102 78,998 -4,320 -5.18 8,805 20.30 0.0742
2022-08-02 2022-06-30 13F MARATHON PETE COM 56585A102 83,318 -10,226 -10.93 7,319 -14.01 0.0601
2022-04-27 2022-03-31 13F MARATHON PETE COM 56585A102 93,544 -7,419 -7.35 8,511 17.90 0.0618
2022-02-18 2021-12-31 13F MARATHON PETE COM 56585A102 100,963 -8,065 -7.40 7,219 -1.94 0.0531
2021-11-22 2021-09-30 13F MARATHON PETE COM 56585A102 109,028 -29,248 -21.15 7,362 -1.83 0.0443
2021-08-26 2021-06-30 13F MARATHON PETE COM 56585A102 138,276 -22,781 -14.14 7,499 -12.15 0.0448
2021-04-28 2021-03-31 13F MARATHON PETE COM 56585A102 161,057 -6,192 -3.70 8,536 11.57 0.0509
2021-01-28 2020-12-31 13F MARATHON PETE COM 56585A102 167,249 -7,218 -4.14 7,651 46.71 0.0485
2020-10-30 2020-09-30 13F MARATHON PETE COM 56585A102 174,467 640 0.37 5,215 -22.53 0.0379
2020-07-31 2020-06-30 13F MARATHON PETE COM 56585A102 173,827 795 0.46 6,732 51.04 0.0519
2020-05-01 2020-03-31 13F MARATHON PETE COM 56585A102 173,032 -8,775 -4.83 4,457 -54.89 0.0409
2020-02-07 2019-12-31 13F MARATHON PETE COM 56585A102 181,807 5,853 3.33 9,881 -15.37 0.0748
2019-10-31 2019-09-30 13F MARATHON PETE COM 56585A102 175,954 2,378 1.37 11,675 23.85 0.0923
2019-08-02 2019-06-30 13F MARATHON PETE COM 56585A102 173,576 -14,013 -7.47 9,427 -20.99 0.0755
2019-05-02 2019-03-31 13F MARATHON PETE COM 56585A102 187,589 -5,913 -3.06 11,931 -3.88 0.0967
2019-02-06 2018-12-31 13F MARATHON PETE COM 56585A102 193,502 74,624 62.77 12,412 44.83 0.1054
2018-11-01 2018-09-30 13F MARATHON PETE COM 56585A102 118,878 -23,852 -16.71 8,570 -16.25 0.0691
2018-08-01 2018-06-30 13F MARATHON PETE COM 56585A102 142,730 -20,840 -12.74 10,233 -21.21 0.0716
2018-05-01 2018-03-31 13F MARATHON PETE COM 56585A102 163,570 -16,615 -9.22 12,987 0.68 0.0928
2018-02-02 2017-12-31 13F MARATHON PETE COM 56585A102 180,185 -7,764 -4.13 12,899 16.20 0.0859
2017-11-06 2017-09-30 13F MARATHON PETE COM 56585A102 187,949 -1,885 -0.99 11,101 5.24 0.0803
2017-08-03 2017-06-30 13F MARATHON PETE COM 56585A102 189,834 -5,636 -2.88 10,548 5.77 0.0789
2017-05-03 2017-03-31 13F MARATHON PETE COM 56585A102 195,470 -10,811 -5.24 9,973 -0.07 0.0757
2017-02-08 2016-12-31 13F MARATHON PETE COM 56585A102 206,281 5,513 2.75 9,980 21.15 0.0790
2016-08-11 2016-06-30 13F MARATHON PETE COM 56585A102 200,768 -8,132 -3.89 8,238 4.05 0.0712
2016-05-11 2016-03-31 13F MARATHON PETE COM 56585A102 208,900 -1,518 -0.72 7,917 -18.54 0.0707
2016-02-05 2015-12-31 13F MARATHON PETE COM 56585A102 210,418 5,041 2.45 9,719 2.14 0.0954
2015-11-12 2015-09-30 13F MARATHON PETE COM 56585A102 205,377 -210,527 -50.62 9,515 -56.26 0.0901
2015-08-13 2015-06-30 13F MARATHON PETE COM 56585A102 415,904 302,889 268.01 21,754 87.99 0.0934
2015-05-15 2015-03-31 13F MARATHON PETE COM 56585A102 113,015 -148,149 -56.73 11,572 -50.91 0.0980
2015-02-13 2014-12-31 13F MARATHON PETE COM 56585A102 261,164 110,450 73.28 23,572 84.70 0.1019
2014-10-21 2014-09-30 13F MARATHON PETE COM 56585A102 150,714 -278,084 -64.85 12,762 -61.88 0.1127
2014-08-12 2014-06-30 13F MARATHON PETE COM 56585A102 428,798 -6,155 -1.42 33,477 -11.57 0.2847
2014-05-15 2014-03-31 13F MARATHON PETE COM 56585A102 434,953 -10,484 -2.35 37,858 -7.35 0.2900
2014-02-11 2013-12-31 13F MARATHON PETE COM 56585A102 445,437 -73,725 -14.20 40,860 22.36 0.3167
2013-11-12 2013-09-30 13F MARATHON PETE COM 56585A102 519,162 24,975 5.05 33,392 -4.91 0.2324
2013-08-13 2013-06-30 13F/A-1 MARATHON PETE COM 56585A102 494,187 494,187 35,117 0.2863
2013-08-08 2013-06-30 13F MARATHON PETE COM 56585A102 3,898,884 277,053
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.