Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionRoyal London Asset Management Ltd
Latest Disclosed Ownership172,574 shares
Latest Disclosed Value $ 42,139,119
Royal London Asset Management Ltd reports 3.16% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 1, 2026 - Royal London Asset Management Ltd filed a 13F-HR form disclosing ownership of 172,574 shares of Marathon Petroleum Corporation (MX:MPC) valued at $42,139,119 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 178,208 shares of Marathon Petroleum Corporation. This represents a change in shares of -3.16% 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)
2026-05-01 2026-03-31 13F MARATHON PETE COM 56585A102 172,574 -5,634 -3.16 42,139 45.40 0.0884
2026-02-13 2025-12-31 13F MARATHON PETE COM 56585A102 178,208 2,864 1.63 28,982 -14.24 0.0610
2025-11-13 2025-09-30 13F MARATHON PETE COM 56585A102 175,344 -4,512 -2.51 33,796 13.12 0.0726
2025-08-14 2025-06-30 13F MARATHON PETE COM 56585A102 179,856 -22,746 -11.23 29,876 1.21 0.0682
2025-05-13 2025-03-31 13F MARATHON PETE COM 56585A102 202,602 15,812 8.47 29,517 13.28 0.0699
2025-02-11 2024-12-31 13F MARATHON PETE COM 56585A102 186,790 -2,144 -1.13 26,057 -15.34 0.0635
2024-11-14 2024-09-30 13F MARATHON PETE COM 56585A102 188,934 3,188 1.72 30,779 -4.48 0.0758
2024-08-07 2024-06-30 13F MARATHON PETE COM 56585A102 185,746 -10,080 -5.15 32,223 -18.34 0.0823
2024-05-14 2024-03-31 13F MARATHON PETE COM 56585A102 195,826 -18,863 -8.79 39,459 23.88 0.0983
2024-03-01 2023-12-31 13F/A-1 MARATHON PETE COM 56585A102 214,689 -4,446 -2.03 31,851 -3.99 0.0911
2024-02-13 2023-12-31 13F MARATHON PETE COM 56585A102 214,689 -4,446 31,851 0.0888
2023-11-14 2023-09-30 13F MARATHON PETE COM 56585A102 219,135 9,212 4.39 33,175 35.50 0.1075
2023-08-11 2023-06-30 13F MARATHON PETE COM 56585A102 209,923 46,014 28.07 24,482 10.78 0.0792
2023-05-15 2023-03-31 13F MARATHON PETE COM 56585A102 163,909 -3,720 -2.22 22,100 13.25 0.0885
2023-02-09 2022-12-31 13F MARATHON PETE COM 56585A102 167,629 -1,222 -0.72 19,515 16.31 0.0875
2022-11-14 2022-09-30 13F MARATHON PETE COM 56585A102 168,851 -23,463 -12.20 16,777 6.13 0.0850
2022-09-06 2022-06-30 13F/A-1 MARATHON PETE COM 56585A102 192,314 -17,351 -8.28 15,808 -11.81 0.0730
2022-08-12 2022-06-30 13F MARATHON PETE COM 56585A102 192,314 -17,351 15,808 0.0689
2022-09-06 2022-03-31 13F/A-1 MARATHON PETE COM 56585A102 209,665 4,310 2.10 17,925 36.42 0.0701
2022-05-13 2022-03-31 13F MARATHON PETE COM 56585A102 209,665 4,310 17,925 0.0702
2022-10-18 2021-12-31 13F/A-2 MARATHON PETE COM 56585A102 205,355 -18,134 -8.11 13,140 -4.84 0.0489
2022-08-16 2021-12-31 13F/A-1 MARATHON PETE COM 56585A102 205,355 -18,134 13,140 0.0496
2022-01-18 2021-12-31 13F MARATHON PETE COM 56585A102 205,355 -18,134 13,140 0.0524
2022-10-18 2021-09-30 13F/A-2 MARATHON PETE COM 56585A102 223,489 -11,871 -5.04 13,808 -2.89 0.0561
2022-08-16 2021-09-30 13F/A-1 MARATHON PETE COM 56585A102 223,489 -11,871 13,808 0.0578
2021-11-02 2021-09-30 13F MARATHON PETE COM 56585A102 223,489 -11,871 13,808 0.0600
2022-10-18 2021-06-30 13F/A-2 MARATHON PETE COM 56585A102 235,360 -14,951 -5.97 14,219 6.21 0.0580
2022-08-16 2021-06-30 13F/A-1 MARATHON PETE COM 56585A102 235,360 -14,951 14,219 0.0602
2021-07-14 2021-06-30 13F MARATHON PETE COM 56585A102 235,360 -14,951 14,219 0.0613
2022-10-17 2021-03-31 13F/A-2 MARATHON PETE COM 56585A102 250,311 12,298 5.17 13,388 36.02 0.0614
2022-08-16 2021-03-31 13F/A-1 MARATHON PETE COM 56585A102 250,311 12,298 13,388 0.0616
2021-04-13 2021-03-31 13F MARATHON PETE COM 56585A102 250,311 12,298 13,389 0.0627
2021-01-29 2020-12-31 13F MARATHON PETROLEUM CORPORATION NPV COM 56585A102 238,013 -6,415 -2.62 9,843 36.90 0.0517
2020-11-04 2020-09-30 13F MARATHON PETE COM 56585A102 244,428 -80 -0.03 7,190 -16.97 0.0435
2020-07-31 2020-06-30 13F MARATHON PETE COM 56585A102 244,508 -12,682 -4.93 8,660 38.36 0.0605
2020-05-01 2020-03-31 13F MARATHON PETE COM 56585A102 257,190 0 0.00 6,259 -59.22 0.0506
2020-02-05 2019-12-31 13F MARATHON PETE COM 56585A102 257,190 -4,403 -1.68 15,348 -3.41 0.1063
2019-11-12 2019-09-30 13F MARATHON PETE COM 56585A102 261,593 -5,083 -1.91 15,890 6.62 0.1203
2019-07-31 2019-06-30 13F MARATHON PETE COM 56585A102 266,676 -5,521 -2.03 14,903 -8.53 0.1410
2019-07-17 2019-03-31 13F/A-1 MARATHON PETE COM 56585A102 272,197 -12,103 -4.26 16,292 -1.61 0.1282
2019-04-30 2019-03-31 13F MARATHON PETE COM 56585A102 272,197 -12,103 16,292
2019-01-29 2018-12-31 13F MARATHON PETE COM 56585A102 284,300 110,409 63.49 16,558 18.16 0.1450
2019-07-17 2018-09-30 13F/A-1 MARATHON PETE COM 56585A102 173,891 -33,225 -16.04 14,013 -3.58 0.1435
2018-11-08 2018-09-30 13F MARATHON PETE COM 56585A102 173,891 -33,225 14,013
2018-09-19 2018-06-30 13F MARATHON PETE COM 56585A102 207,116 21,531 11.60 14,534 106.27 0.1462
2016-08-02 2016-06-30 13F MARATHON PETE COM 56585A102 185,585 -4,696,965 -96.20 7,046 5,278.63 0.1150
2016-05-17 2016-03-31 13F MARATHON PETE COM 56585A102 4,882,550 4,689,650 2,431.13 131 -98.70 0.1875
2016-02-25 2015-12-31 13F MARATHON PETE COM 56585A102 192,900 3,592 1.90 10,086 14.99 0.1558
2015-11-09 2015-09-30 13F MARATHON PETE COM 56585A102 189,308 99,885 111.70 8,771 -89.18 0.1413
2015-02-11 2014-12-31 13F MARATHON PETE COM 56585A102 89,423 18,479 26.05 81,062 1,253.74 0.1533
2014-11-26 2014-09-30 13F MARATHON PETE COM 56585A102 70,944 2,233 3.25 5,988 0.45 0.1503
2014-08-28 2014-06-30 13F MARATHON PETE COM 56585A102 68,711 -290 -0.42 5,961 -6.11 0.1369
2014-05-21 2014-03-31 13F MARATHON PETE COM 56585A102 69,001 -3,432 -4.74 6,349 -3.64 0.1476
2014-01-27 2013-12-31 13F MARATHON PETE COM 56585A102 72,433 -5,993 -7.64 6,589 21.39 0.1671
2013-10-30 2013-09-30 13F MARATHON PETE COM 56585A102 78,426 420 0.54 5,428 -2.06 0.1454
2013-08-30 2013-06-30 13F MARATHON PETE COM 56585A102 78,006 78,006 5,542 0.1617
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.