Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionVictory Capital Management Inc
Latest Disclosed Ownership422,686 shares
Latest Disclosed Value $ 103,211,467
Victory Capital Management Inc reports 59.97% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Victory Capital Management Inc filed a 13F-HR form disclosing ownership of 422,686 shares of Marathon Petroleum Corporation (MX:MPC) valued at $103,211,467 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,055,897 shares of Marathon Petroleum Corporation. This represents a change in shares of -59.97% 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)
2026-05-15 2026-03-31 13F MARATHON PETE COM 56585A102 422,686 -633,211 -59.97 103,211 -39.90 0.0496
2026-02-13 2025-12-31 13F MARATHON PETE COM 56585A102 1,055,897 540,283 104.78 171,721 72.79 0.0969
2025-11-12 2025-09-30 13F MARATHON PETE COM 56585A102 515,614 -354,686 -40.75 99,379 -31.26 0.0581
2025-08-13 2025-06-30 13F MARATHON PETE COM 56585A102 870,300 478,712 122.25 144,566 153.40 0.0932
2025-05-02 2025-03-31 13F MARATHON PETE COM 56585A102 391,588 -46,682 -10.65 57,050 -6.69 0.0584
2025-02-06 2024-12-31 13F MARATHON PETE COM 56585A102 438,270 -40,606 -8.48 61,139 -21.63 0.0601
2024-11-05 2024-09-30 13F MARATHON PETE COM 56585A102 478,876 49,523 11.53 78,014 4.74 0.0752
2024-08-05 2024-06-30 13F MARATHON PETE COM 56585A102 429,353 117,562 37.71 74,484 18.56 0.0747
2024-05-03 2024-03-31 13F MARATHON PETE COM 56585A102 311,791 -92,047 -22.79 62,826 4.86 0.0613
2024-02-05 2023-12-31 13F MARATHON PETE COM 56585A102 403,838 -114,523 -22.09 59,913 -23.63 0.0630
2023-11-06 2023-09-30 13F MARATHON PETE COM 56585A102 518,361 353 0.07 78,449 29.88 0.0902
2023-07-27 2023-06-30 13F MARATHON PETE COM 56585A102 518,008 132,839 34.49 60,400 16.30 0.0664
2023-05-02 2023-03-31 13F MARATHON PETE COM 56585A102 385,169 -32,284 -7.73 51,932 6.88 0.0583
2023-04-25 2022-12-31 13F/A-3 MARATHON PETE COM 56585A102 417,453 -54,194 -11.49 48,587 3.71 0.0559
2023-03-10 2022-12-31 13F/A-2 MARATHON PETE COM 56585A102 417,453 -54,194 48,587 0.0530
2023-02-10 2022-12-31 13F/A-1 MARATHON PETE COM 56585A102 417,453 -54,194 48,587 0.0335
2023-02-09 2022-12-31 13F MARATHON PETE COM 56585A102 406,524 -65,123 52,246 0.0355
2022-11-02 2022-09-30 13F MARATHON PETE COM 56585A102 471,647 -157,588 -25.04 46,849 -9.43 0.0547
2022-08-01 2022-06-30 13F MARATHON PETE COM 56585A102 629,235 39,181 6.64 51,729 0.47 0.0589
2022-05-04 2022-03-31 13F MARATHON PETE COM 56585A102 590,054 302,118 104.93 51,488 179.45 0.0515
2022-02-07 2021-12-31 13F MARATHON PETE COM 56585A102 287,936 107,185 59.30 18,425 64.92 0.0170
2021-11-02 2021-09-30 13F MARATHON PETE COM 56585A102 180,751 -129,289 -41.70 11,172 -40.36 0.0109
2021-08-03 2021-06-30 13F MARATHON PETE COM 56585A102 310,040 95,584 44.57 18,733 63.31 0.0180
2021-05-04 2021-03-31 13F MARATHON PETE COM 56585A102 214,456 -31,978 -12.98 11,471 12.54 0.0118
2021-02-01 2020-12-31 13F MARATHON PETE COM 56585A102 246,434 -2,559 -1.03 10,193 39.53 0.0114
2020-11-09 2020-09-30 13F Marathon Petroleum COM 56585A102 248,993 -76,156 -23.42 7,305 -39.90 0.0094
2020-08-07 2020-06-30 13F MARATHON PETE COM 56585A102 325,149 -71,748 -18.08 12,154 29.64 0.0165
2020-05-12 2020-03-31 13F/A-1 MARATHON PETE COM 56585A102 396,897 9,541 2.46 9,375 -59.83 0.0157
2020-05-04 2020-03-31 13F MARATHON PETE COM 56585A102 396,897 9,541 9,375 10,259.9848
2020-02-06 2019-12-31 13F/A-1 MARATHON PETE COM 56585A102 387,356 239 0.06 23,338 -0.76 0.0283
2020-02-04 2019-12-31 13F MARATHON PETE COM 56585A102 385,762 -1,355 21,024 25,201.2721
2019-11-12 2019-09-30 13F MARATHON PETE COM 56585A102 387,117 183,712 90.32 23,517 106.91 0.0303
2019-08-15 2019-06-30 13F MARATHON PETE COM 56585A102 203,405 23,496 13.06 11,366 5.55 0.0229
2019-05-03 2019-03-31 13F MARATHON PETE CS 56585A102 179,909 133,807 290.24 10,768 295.88 0.0245
2019-05-02 2018-12-31 13F/A-1 MARATHON PETE COM 56585A102 46,102 3,128 7.28 2,720 -20.86 0.0068
2019-02-05 2018-12-31 13F MARATHON PETE COM 56585A102 46,102 3,128 2,720
2018-11-01 2018-09-30 13F MARATHON PETE COM 56585A102 42,974 -140,568 -76.59 3,437 -73.31 0.0071
2018-08-02 2018-06-30 13F MARATHON PETE COM 56585A102 183,542 482 0.26 12,877 -3.79 0.0274
2018-05-04 2018-03-31 13F MARATHON PETE COM 56585A102 183,060 32,002 21.19 13,384 34.28 0.0292
2018-02-01 2017-12-31 13F MARATHON PETE COM 56585A102 151,058 13,632 9.92 9,967 29.32 0.0210
2017-10-27 2017-09-30 13F MARATHON PETE COM 56585A102 137,426 37,936 38.13 7,707 48.04 0.0173
2017-08-07 2017-06-30 13F MARATHON PETE COM 56585A102 99,490 11,439 12.99 5,206 16.99 0.0122
2017-05-10 2017-03-31 13F MARATHON PETE COM 56585A102 88,051 23,683 36.79 4,450 37.30 0.0106
2017-02-09 2016-12-31 13F MARATHON PETE COM 56585A102 64,368 8,821 15.88 3,241 43.73 0.0082
2016-11-02 2016-09-30 13F MARATHON PETE COM 56585A102 55,547 3,580 6.89 2,255 14.29 0.0063
2016-08-09 2016-06-30 13F MARATHON PETE COM 56585A102 51,967 8,542 19.67 1,973 22.17 0.0079
2016-05-17 2016-03-31 13F/A-2 MARATHON PETE COM 56585A102 43,425 26,163 151.56 1,615 80.45 0.0067
2016-05-12 2016-03-31 13F/A-1 MARATHON PETE COM 56585A102 43,425 0 1,615 0.0066
2016-05-12 2016-03-31 13F MARATHON PETE COM 56585A102 43,425 1,615
2016-02-10 2015-12-31 13F MARATHON PETE COM 56585A102 17,262 7,419 75.37 895 96.27 0.0037
2015-11-06 2015-09-30 13F MARATHON PETE COM 56585A102 9,843 43 0.44 456 -12.81 0.0019
2015-08-14 2015-06-30 13F/A-01 Marathon Petroleum COM 56585A102 9,800 9,011 1,142.08 523 545.68 0.0019
2015-08-07 2015-06-30 13F Marathon Petroleum COM 56585A102 9,800 523
2015-05-07 2015-03-31 13F Marathon Petroleum COM 56585A102 789 0 0.00 81 14.08 0.0003
2015-02-11 2014-12-31 13F Marathon Petroleum COM 56585A102 789 0 0.00 71 5.97 0.0003
2014-10-16 2014-09-30 13F MARATHON PETE Common Stock 56585A102 789 0 0.00 67 8.06 0.0005
2014-08-08 2014-06-30 13F Marathon Petroleum Common Stock 56585A102 789 0 0.00 62 -10.14 0.0004
2014-05-06 2014-03-31 13F Marathon Petroleum Common Stock 56585A102 789 789 776.67 69 1,280.00 0.0005
2014-02-12 2013-12-31 13F Marathon Petroleum Common Stock 56585A102 0 -90 -100.00 0 -100.00
2014-03-12 2013-09-30 13F/A-1 Marathon Petroleum Common Stock 56585A102 90 90 5 0.0000
2013-11-12 2013-09-30 13F Marathon Petroleum Common Stock 56585A102 90 5
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.