Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionCommerce Bank
Latest Disclosed Ownership37,810 shares
Latest Disclosed Value $ 9,232,445
Commerce Bank reports 16.77% increase in ownership of MPC / Marathon Petroleum Corporation

On May 11, 2026 - Commerce Bank filed a 13F-HR form disclosing ownership of 37,810 shares of Marathon Petroleum Corporation (US:MPC) valued at $9,232,446 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 32,381 shares of Marathon Petroleum Corporation. This represents a change in shares of 16.77% during the quarter. The current value of the position is $10,103,210 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.

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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)
2026-05-11 2026-03-31 13F MARATHON PETE COM 56585A102 37,810 5,429 16.77 9,232 75.31 0.0447
2026-02-13 2025-12-31 13F MARATHON PETE COM 56585A102 32,381 -3,256 -9.14 5,266 -23.33 0.0291
2025-11-12 2025-09-30 13F MARATHON PETE COM 56585A102 35,637 -1,076 -2.93 6,869 12.63 0.0382
2025-08-07 2025-06-30 13F MARATHON PETE COM 56585A102 36,713 -810 -2.16 6,098 11.56 0.0360
2025-05-08 2025-03-31 13F MARATHON PETE COM 56585A102 37,523 2,471 7.05 5,467 11.80 0.0349
2025-02-13 2024-12-31 13F MARATHON PETE COM 56585A102 35,052 -685 -1.92 4,890 -16.01 0.0301
2024-11-08 2024-09-30 13F MARATHON PETE COM 56585A102 35,737 -532 -1.47 5,822 -7.47 0.0357
2024-08-12 2024-06-30 13F MARATHON PETE COM 56585A102 36,269 -156 -0.43 6,292 -14.28 0.0408
2024-05-03 2024-03-31 13F MARATHON PETE COM 56585A102 36,425 521 1.45 7,340 37.80 0.0485
2024-02-09 2023-12-31 13F MARATHON PETE COM 56585A102 35,904 -98 -0.27 5,327 -2.24 0.0379
2023-11-14 2023-09-30 13F MARATHON PETE COM 56585A102 36,002 96 0.27 5,449 30.15 0.0429
2023-08-08 2023-06-30 13F MARATHON PETE COM 56585A102 35,906 1,490 4.33 4,187 -9.78 0.0313
2023-05-04 2023-03-31 13F MARATHON PETE COM 56585A102 34,416 392 1.15 4,640 17.17 0.0364
2023-02-10 2022-12-31 13F MARATHON PETE COM 56585A102 34,024 813 2.45 3,960 20.04 0.0322
2022-11-04 2022-09-30 13F MARATHON PETE COM 56585A102 33,211 -105 -0.32 3,299 20.49 0.0287
2022-08-12 2022-06-30 13F MARATHON PETE COM 56585A102 33,316 -828 -2.43 2,738 -6.20 0.0223
2022-05-09 2022-03-31 13F MARATHON PETE COM 56585A102 34,144 -1,489 -4.18 2,919 28.03 0.0200
2022-02-14 2021-12-31 13F MARATHON PETE COM 56585A102 35,633 1,585 4.66 2,280 8.31 0.0149
2021-11-09 2021-09-30 13F MARATHON PETE COM 56585A102 34,048 4,909 16.85 2,105 19.60 0.0149
2021-08-09 2021-06-30 13F MARATHON PETE COM 56585A102 29,139 675 2.37 1,760 15.56 0.0125
2021-05-05 2021-03-31 13F MARATHON PETE COM 56585A102 28,464 -588 -2.02 1,523 26.71 0.0116
2021-02-09 2020-12-31 13F MARATHON PETE COM 56585A102 29,052 -609 -2.05 1,202 38.16 0.0097
2020-11-06 2020-09-30 13F MARATHON PETE COM 56585A102 29,661 3,404 12.96 870 -11.41 0.0079
2020-08-07 2020-06-30 13F MARATHON PETE COM 56585A102 26,257 -10,299 -28.17 982 13.79 0.0096
2020-05-08 2020-03-31 13F MARATHON PETE COM 56585A102 36,556 -6,527 -15.15 863 -66.76 0.0104
2020-02-14 2019-12-31 13F MARATHON PETE COM 56585A102 43,083 922 2.19 2,596 1.37 0.0247
2019-11-12 2019-09-30 13F MARATHON PETE COM 56585A102 42,161 -944 -2.19 2,561 6.35 0.0263
2019-08-07 2019-06-30 13F MARATHON PETE COM 56585A102 43,105 -457 -1.05 2,408 -7.63 0.0270
2019-05-08 2019-03-31 13F MARATHON PETE COM 56585A102 43,562 -436 -0.99 2,607 0.39 0.0309
2019-02-11 2018-12-31 13F MARATHON PETE COM 56585A102 43,998 5,321 13.76 2,597 -16.04 0.0331
2018-11-02 2018-09-30 13F MARATHON PETE COM 56585A102 38,677 -149 -0.38 3,093 13.55 0.0368
2018-08-08 2018-06-30 13F MARATHON PETE COM 56585A102 38,826 -171 -0.44 2,724 -4.45 0.0346
2018-05-03 2018-03-31 13F MARATHON PETE COM 56585A102 38,997 -1,003 -2.51 2,851 7.99 0.0376
2018-02-12 2017-12-31 13F MARATHON PETE COM 56585A102 40,000 -1,260 -3.05 2,640 14.09 0.0344
2017-11-07 2017-09-30 13F/A-1 MARATHON PETE COM 56585A102 41,260 120 0.29 2,314 7.48 0.0314
2017-11-07 2017-09-30 13F MARATHON PETE COM 56585A102 41,140 2,153
2017-08-08 2017-06-30 13F MARATHON PETE COM 56585A102 41,140 -321 -0.77 2,153 2.77 0.0302
2017-05-05 2017-03-31 13F MARATHON PETE COM 56585A102 41,461 2,449 6.28 2,095 6.67 0.0299
2017-02-08 2016-12-31 13F MARATHON PETE COM 56585A102 39,012 -11,615 -22.94 1,964 -4.43 0.0293
2016-11-03 2016-09-30 13F MARATHON PETE COM 56585A102 50,627 6,257 14.10 2,055 21.96 0.0320
2016-08-09 2016-06-30 13F MARATHON PETE COM 56585A102 44,370 6,758 17.97 1,685 20.53 0.0267
2016-04-27 2016-03-31 13F MARATHON PETE COM 56585A102 37,612 -3,522 -8.56 1,398 -34.43 0.0232
2016-02-12 2015-12-31 13F MARATHON PETE COM 56585A102 41,134 -300 -0.72 2,132 11.10 0.0357
2015-11-10 2015-09-30 13F MARATHON PETE COM 56585A102 41,434 -9,219 -18.20 1,919 -27.58 0.0330
2015-08-03 2015-06-30 13F MARATHON PETE COM 56585A102 50,653 25,813 103.92 2,650 4.17 0.0415
2015-05-06 2015-03-31 13F MARATHON PETE COM 56585A102 24,840 -718 -2.81 2,544 10.32 0.0395
2015-02-11 2014-12-31 13F MARATHON PETE COM 56585A102 25,558 -620 -2.37 2,306 4.06 0.0364
2014-11-06 2014-09-30 13F MARATHON PETE COM 56585A102 26,178 -5,963 -18.55 2,216 -11.68 0.0366
2014-08-05 2014-06-30 13F MARATHON PETE COM 56585A102 32,141 515 1.63 2,509 -8.86 0.0410
2014-05-09 2014-03-31 13F MARATHON PETE COM 56585A102 31,626 213 0.68 2,753 -4.44 0.0469
2014-02-14 2013-12-31 13F MARATHON PETE COM 56585A102 31,413 -4,721 -13.07 2,881 23.97 0.0499
2013-11-05 2013-09-30 13F/A-1 MARATHON PETE COM 56585A102 54,584 18,014 2,668 0.0481
2013-11-05 2013-09-30 13F/A-2 MARATHON PETE COM 56585A102 36,134 -436 -1.19 2,324 -10.55 0.0419
2013-11-04 2013-09-30 13F MARATHON PETE COM 56585A102 54,584 2,668
2013-08-07 2013-06-30 13F MARATHON PETE COM 56585A102 36,570 10,950 42.74 2,598 13.15 0.0483
2013-08-08 2013-03-31 13F/A-1 MARATHON PETE COM 56585A102 25,620 25,620 2,296 0.0448
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.