Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionPrincipal Financial Group Inc
Latest Disclosed Ownership1,519,520 shares
Latest Disclosed Value $ 371,036,619
Principal Financial Group Inc reports 8.16% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 4, 2026 - Principal Financial Group Inc filed a 13F-HR form disclosing ownership of 1,519,520 shares of Marathon Petroleum Corporation (MX:MPC) valued at $371,036,619 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 1,654,472 shares of Marathon Petroleum Corporation. This represents a change in shares of -8.16% 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)
2026-05-04 2026-03-31 13F MARATHON PETE COM 56585A102 1,519,520 -134,952 -8.16 371,037 37.90 0.1982
2026-02-02 2025-12-31 13F MARATHON PETE COM 56585A102 1,654,472 -232,376 -12.32 269,067 -26.01 0.1374
2025-11-04 2025-09-30 13F MARATHON PETE COM 56585A102 1,886,848 -154,333 -7.56 363,671 7.26 0.1834
2025-08-08 2025-06-30 13F MARATHON PETE COM 56585A102 2,041,181 99,648 5.13 339,061 19.87 0.1792
2025-04-28 2025-03-31 13F MARATHON PETE COM 56585A102 1,941,533 -61,014 -3.05 282,862 1.26 0.1587
2025-01-31 2024-12-31 13F MARATHON PETE COM 56585A102 2,002,547 -106,179 -5.04 279,355 -18.68 0.1523
2024-10-31 2024-09-30 13F MARATHON PETE COM 56585A102 2,108,726 -10,963 -0.52 343,533 -6.58 0.1892
2024-07-29 2024-06-30 13F MARATHON PETE COM 56585A102 2,119,689 -279,225 -11.64 367,724 -23.93 0.2184
2024-04-29 2024-03-31 13F MARATHON PETE COM 56585A102 2,398,914 -104,507 -4.17 483,381 30.15 0.2841
2024-02-07 2023-12-31 13F MARATHON PETE COM 56585A102 2,503,421 -243,193 -8.85 371,408 -10.65 0.2368
2023-11-02 2023-09-30 13F MARATHON PETE COM 56585A102 2,746,614 36,987 1.37 415,673 31.57 0.2987
2023-08-07 2023-06-30 13F MARATHON PETE COM 56585A102 2,709,627 -243,410 -8.24 315,942 -20.65 0.2159
2023-05-09 2023-03-31 13F MARATHON PETE COM 56585A102 2,953,037 -29,132 -0.98 398,158 14.71 0.2846
2023-02-09 2022-12-31 13F MARATHON PETE COM 56585A102 2,982,169 58,361 2.00 347,095 19.51 0.2614
2022-11-09 2022-09-30 13F MARATHON PETE COM 56585A102 2,923,808 -267,112 -8.37 290,422 10.71 0.2308
2022-08-10 2022-06-30 13F MARATHON PETE COM 56585A102 3,190,920 -101,945 -3.10 262,326 -6.82 0.1941
2022-05-09 2022-03-31 13F MARATHON PETE COM 56585A102 3,292,865 222,994 7.26 281,540 43.36 0.1117
2022-05-09 2022-03-31 13F MARATHON PETE COM 56585A102 3,233,064 276,427
2022-02-09 2021-12-31 13F MARATHON PETE COM 56585A102 3,069,871 -358,206 -10.45 196,386 -7.32 0.1172
2021-11-09 2021-09-30 13F MARATHON PETE COM 56585A102 3,428,077 -27,840 -0.81 211,890 1.48 0.1382
2021-08-10 2021-06-30 13F MARATHON PETE COM 56585A102 3,455,917 -677,935 -16.40 208,806 -5.57 0.1349
2021-05-10 2021-03-31 13F MARATHON PETE COM 56585A102 4,133,852 -137,214 -3.21 221,120 25.17 0.1560
2021-02-23 2020-12-31 13F/A-1 MARATHON PETE COM 56585A102 4,271,066 132,248 3.20 176,651 45.47 0.1308
2021-02-08 2020-12-31 13F MARATHON PETE COM 56585A102 4,271,091 132,273 176,652 69,497.6192
2020-11-06 2020-09-30 13F MARATHON PETE COM 56585A102 4,138,818 -257,610 -5.86 121,432 -26.11 0.1022
2020-08-05 2020-06-30 13F MARATHON PETE COM 56585A102 4,396,428 281,577 6.84 164,338 69.08 0.1457
2020-05-12 2020-03-31 13F MARATHON PETE COM 56585A102 4,114,851 140,283 3.53 97,194 -59.41 0.1076
2020-02-05 2019-12-31 13F MARATHON PETE COM 56585A102 3,974,568 -76,349 -1.88 239,468 -2.69 0.1995
2019-11-13 2019-09-30 13F MARATHON PETE COM 56585A102 4,050,917 -18,364 -0.45 246,093 8.22 0.2170
2019-08-12 2019-06-30 13F MARATHON PETE COM 56585A102 4,069,281 554,265 15.77 227,391 8.09 0.2045
2019-05-10 2019-03-31 13F MARATHON PETE COM 56585A102 3,515,016 95,734 2.80 210,373 4.26 0.1960
2019-02-14 2018-12-31 13F MARATHON PETE COM 56585A102 3,419,282 183,467 5.67 201,772 -22.03 0.2150
2018-11-14 2018-09-30 13F MARATHON PETE COM 56585A102 3,235,815 570,266 21.39 258,768 38.37 0.2281
2018-08-13 2018-06-30 13F MARATHON PETE COM 56585A102 2,665,549 -925,133 -25.76 187,015 -28.76 0.1719
2018-05-14 2018-03-31 13F MARATHON PETE COM 56585A102 3,590,682 -171,767 -4.57 262,514 5.75 0.2523
2018-02-12 2017-12-31 13F MARATHON PETE COM 56585A102 3,762,449 -129,127 -3.32 248,245 13.75 0.2286
2017-11-02 2017-09-30 13F MARATHON PETE COM 56585A102 3,891,576 -56,360 -1.43 218,239 5.64 0.2116
2017-08-08 2017-06-30 13F MARATHON PETE COM 56585A102 3,947,936 2,990,640 312.40 206,595 327.01 0.2070
2017-05-11 2017-03-31 13F MARATHON PETE COM 56585A102 957,296 138,616 16.93 48,382 17.37 0.0582
2017-02-13 2016-12-31 13F MARATHON PETE COM 56585A102 818,680 5,273 0.65 41,221 24.85 0.0523
2016-11-10 2016-09-30 13F MARATHON PETE COM 56585A102 813,407 -1,463 -0.18 33,016 6.73 0.0436
2016-08-09 2016-06-30 13F MARATHON PETE COM 56585A102 814,870 -135,527 -14.26 30,933 -12.46 0.0432
2016-05-10 2016-03-31 13F MARATHON PETE COM 56585A102 950,397 205,763 27.63 35,336 -8.46 0.0513
2016-02-09 2015-12-31 13F MARATHON PETE COM 56585A102 744,634 -129,345 -14.80 38,602 -4.67 0.0574
2015-11-12 2015-09-30 13F/A-1 MARATHON PETE COM 56585A102 873,979 147,466 20.30 40,491 6.55 0.0636
2015-11-09 2015-09-30 13F MARATHON PETE COM 56585A102 873,979 40,491
2015-08-10 2015-06-30 13F MARATHON PETE COM 56585A102 726,513 353,666 94.86 38,003 -0.45 0.0567
2015-05-14 2015-03-31 13F/A-1 MARATHON PETE COM 56585A102 372,847 17,919 5.05 38,174 19.17 0.0569
2015-05-12 2015-03-31 13F MARATHON PETE COM 56585A102 372,847 38,174
2015-02-12 2014-12-31 13F MARATHON PETE COM 56585A102 354,928 5,216 1.49 32,034 8.19 0.0498
2014-11-13 2014-09-30 13F MARATHON PETE COM 56585A102 349,712 5,046 1.46 29,609 10.04 0.0502
2014-08-12 2014-06-30 13F MARATHON PETE COM 56585A102 344,666 -319,261 -48.09 26,907 -53.44 0.0452
2014-05-13 2014-03-31 13F MARATHON PETE COM 56585A102 663,927 -612,161 -47.97 57,786 -50.63 0.1031
2014-02-12 2013-12-31 13F MARATHON PETE COM 56585A102 1,276,088 922,488 260.88 117,055 414.69 0.2185
2013-11-05 2013-09-30 13F MARATHON PETE COM 56585A102 353,600 -98,450 -21.78 22,743 -29.20 0.0470
2013-08-12 2013-06-30 13F MARATHON PETE COM 56585A102 452,050 452,050 32,121 0.0711
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.