Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionOld National Bancorp /in/
Latest Disclosed Ownership33,297 shares
Latest Disclosed Value $ 8,130,461
Old National Bancorp /in/ reports 3.14% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 21, 2026 - Old National Bancorp /in/ filed a 13F-HR form disclosing ownership of 33,297 shares of Marathon Petroleum Corporation (MX:MPC) valued at $8,130,461 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 34,377 shares of Marathon Petroleum Corporation. This represents a change in shares of -3.14% 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)
2026-04-21 2026-03-31 13F MARATHON PETE COM 56585A102 33,297 -1,080 -3.14 8,130 45.44 0.1362
2026-01-28 2025-12-31 13F MARATHON PETE COM 56585A102 34,377 -1,429 -3.99 5,591 -19.00 0.0929
2025-10-14 2025-09-30 13F MARATHON PETE COM 56585A102 35,806 -1,370 -3.69 6,901 11.76 0.1180
2025-07-22 2025-06-30 13F MARATHON PETE COM 56585A102 37,176 -596 -1.58 6,175 12.21 0.1100
2025-04-14 2025-03-31 13F MARATHON PETE COM 56585A102 37,772 -1,996 -5.02 5,503 -0.79 0.1446
2025-01-23 2024-12-31 13F MARATHON PETE COM 56585A102 39,768 -1,041 -2.55 5,548 -16.56 0.1315
2024-10-18 2024-09-30 13F MARATHON PETE COM 56585A102 40,809 -297 -0.72 6,648 -6.77 0.1535
2024-07-11 2024-06-30 13F MARATHON PETE COM 56585A102 41,106 -230 -0.56 7,131 -14.38 0.1679
2024-04-15 2024-03-31 13F MARATHON PETE COM 56585A102 41,336 -2,279 -5.23 8,329 28.73 0.1977
2024-02-01 2023-12-31 13F MARATHON PETE COM 56585A102 43,615 -2,461 -5.34 6,471 -7.21 0.1703
2023-11-17 2023-09-30 13F MARATHON PETE COM 56585A102 46,076 -4,348 -8.62 6,973 18.61 0.2017
2023-07-25 2023-06-30 13F MARATHON PETE COM 56585A102 50,424 -7,979 -13.66 5,879 -25.34 0.1683
2023-04-19 2023-03-31 13F MARATHON PETE COM 56585A102 58,403 -7,116 -10.86 7,874 112,385.71 0.2410
2023-02-03 2022-12-31 13F MARATHON PETE COM 56585A102 65,519 -12,974 -16.53 8 -99.91 0.2393
2023-02-17 2022-09-30 13F/A-1 MARATHON PETE COM 56585A102 78,493 -11,461 -12.74 7,796 5.42 0.2646
2022-11-08 2022-09-30 13F MARATHON PETE COM 56585A102 78,493 -11,461 7,796 0.1480
2022-07-25 2022-06-30 13F MARATHON PETE COM 56585A102 89,954 -13,727 -13.24 7,395 -16.58 0.2495
2022-05-09 2022-03-31 13F MARATHON PETE COM 56585A102 103,681 -12,566 -10.81 8,865 19.19 0.2008
2022-05-09 2022-03-31 13F MARATHON PETE COM 56585A102 90,323 7,723
2022-01-25 2021-12-31 13F MARATHON PETE COM 56585A102 116,247 -99,921 -46.22 7,438 -44.33 0.2656
2021-10-25 2021-09-30 13F MARATHON PETE COM 56585A102 216,168 -55,082 -20.31 13,362 -18.47 0.5050
2021-07-26 2021-06-30 13F MARATHON PETE COM 56585A102 271,250 -3,933 -1.43 16,389 11.34 0.6109
2021-04-21 2021-03-31 13F MARATHON PETE COM 56585A102 275,183 19,819 7.76 14,720 39.37 0.5843
2021-01-19 2020-12-31 13F MARATHON PETE COM 56585A102 255,364 18,943 8.01 10,562 52.26 0.4447
2020-10-29 2020-09-30 13F MARATHON PETE COM 56585A102 236,421 -17,229 -6.79 6,937 -26.84 0.3346
2020-07-27 2020-06-30 13F MARATHON PETE COM 56585A102 253,650 129,588 104.45 9,482 223.51 0.4852
2020-04-24 2020-03-31 13F MARATHON PETE COM 56585A102 124,062 732 0.59 2,931 -60.56 0.1802
2020-01-16 2019-12-31 13F MARATHON PETE COM 56585A102 123,330 7,451 6.43 7,431 5.55 0.3641
2019-10-22 2019-09-30 13F MARATHON PETE COM 56585A102 115,879 13,492 13.18 7,040 23.06 0.3550
2019-07-15 2019-06-30 13F MARATHON PETE COM 56585A102 102,387 51,081 99.56 5,721 86.35 0.2912
2019-04-30 2019-03-31 13F MARATHON PETE COM 56585A102 51,306 20,999 69.29 3,070 71.70 0.1604
2019-01-31 2018-12-31 13F MARATHON PETE COM 56585A102 30,307 9,423 45.12 1,788 7.07 0.0990
2018-10-26 2018-09-30 13F MARATHON PETE COM 56585A102 20,884 -1,483 -6.63 1,670 6.44 0.0823
2018-07-26 2018-06-30 13F MARATHON PETE COM 56585A102 22,367 -651 -2.83 1,569 -6.77 0.0810
2018-04-18 2018-03-31 13F MARATHON PETE COM 56585A102 23,018 -312 -1.34 1,683 9.36 0.0887
2018-02-07 2017-12-31 13F MARATHON PETE COM 56585A102 23,330 -189 -0.80 1,539 16.68 0.0795
2017-10-27 2017-09-30 13F MARATHON PETE COM 56585A102 23,519 -431 -1.80 1,319 5.27 0.0717
2017-07-14 2017-06-30 13F MARATHON PETE COM 56585A102 23,950 -3,315 -12.16 1,253 -9.07 0.0687
2017-11-13 2017-03-31 13F/A-1 MARATHON PETE COM 56585A102 27,265 -2,537 -8.51 1,378 -8.13 0.0756
2017-05-01 2017-03-31 13F MARATHON PETE COM 56585A102 27,265 -2,537 1,378 0.0757
2017-02-14 2016-12-31 13F MARATHON PETE COM 56585A102 29,802 5,946 24.92 1,500 54.96 0.0861
2016-11-01 2016-09-30 13F MARATHON PETE COM 56585A102 23,856 -3,798 -13.73 968 -7.72 0.0553
2016-08-09 2016-06-30 13F MARATHON PETE COM 56585A102 27,654 7,844 39.60 1,049 42.33 0.0594
2016-04-20 2016-03-31 13F MARATHON PETE COM 56585A102 19,810 -2,725 -12.09 737 -36.95 0.0434
2016-02-16 2015-12-31 13F MARATHON PETE COM 56585A102 22,535 -1,499 -6.24 1,169 4.94 0.0692
2015-11-23 2015-09-30 13F MARATHON PETE COM 56585A102 24,034 -555 -2.26 1,114 -13.37 0.0676
2015-08-17 2015-06-30 13F MARATHON PETE COM 56585A102 24,589 10,477 74.24 1,286 -11.00 0.0722
2015-05-19 2015-03-31 13F MARATHON PETE COM 56585A102 14,112 -379 -2.62 1,445 10.47 0.0789
2015-02-17 2014-12-31 13F MARATHON PETE COM 56585A102 14,491 -68 -0.47 1,308 6.08 0.0834
2014-11-17 2014-09-30 13F MARATHON PETE COM 56585A102 14,559 9,549 190.60 1,233 215.35 0.0805
2014-08-14 2014-06-30 13F MARATHON PETE COM 56585A102 5,010 5,010 391 0.0295
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.