Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionRussell Investments Group, Ltd.
Latest Disclosed Ownership331,080 shares
Latest Disclosed Value $ 80,962,203
Russell Investments Group, Ltd. reports 8.70% increase in ownership of MPC / Marathon Petroleum Corporation

On May 8, 2026 - Russell Investments Group, Ltd. filed a 13F-HR form disclosing ownership of 331,080 shares of Marathon Petroleum Corporation (MX:MPC) valued at $80,962,203 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 304,578 shares of Marathon Petroleum Corporation. This represents a change in shares of 8.70% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 331,080 26,502 8.70 80,962 63.19 0.0870
2026-02-17 2025-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 304,578 60,369 24.72 49,613 5.27 0.0540
2025-11-13 2025-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 244,209 31,746 14.94 47,132 33.46 0.0535
2025-08-13 2025-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 212,463 -41,627 -16.38 35,314 -4.54 0.0450
2025-05-13 2025-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 254,090 -32,625 -11.38 36,992 -7.36 0.0508
2025-02-13 2024-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 286,715 -45,116 -13.60 39,932 -26.15 0.0552
2024-11-13 2024-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 331,831 -49,819 -13.05 54,075 -18.31 0.0783
2024-08-08 2024-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 381,650 -219,321 -36.49 66,196 -45.02 0.1067
2024-05-08 2024-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 600,971 -28,068 -4.46 120,405 29.33 0.1900
2024-02-05 2023-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 629,039 -42,878 -6.38 93,103 -8.76 0.1657
2023-11-13 2023-09-30 13F MARATHON PETE CORP COM Common Stock 56585A102 671,917 79,206 13.36 102,041 47.68 0.2021
2023-08-10 2023-06-30 13F MARATHON PETE CORP COM Common Stock 56585A102 592,711 17,409 3.03 69,097 -10.79 0.1333
2023-05-09 2023-03-31 13F MARATHON PETE CORP COM Common Stock 56585A102 575,302 -50,915 -8.13 77,454 6.30 0.1520
2023-02-08 2022-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 626,217 140 0.02 72,861 17.25 0.1500
2022-11-04 2022-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 626,077 -85,306 -11.99 62,141 5.97 0.1366
2022-07-29 2022-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 711,383 -86,320 -10.82 58,640 -14.00 0.1196
2022-05-05 2022-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 797,703 208,517 35.39 68,189 81.09 0.1186
2022-01-21 2021-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 589,186 157,670 36.54 37,655 41.15 0.0602
2021-11-08 2021-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 431,516 115,623 36.60 26,677 39.87 0.0451
2021-08-04 2021-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 315,893 -7,006 -2.17 19,073 10.40 0.0319
2021-05-10 2021-03-31 13F Marathon Petroleum Common Stock 56585A102 322,899 118,286 57.81 17,277 103.83 0.0306
2021-02-08 2020-12-31 13F Marathon Petroleum Common Stock 56585A102 204,613 -768,918 -78.98 8,476 -70.33 0.0168
2020-11-09 2020-09-30 13F Marathon Petroleum Common Stock 56585A102 973,531 655,584 206.19 28,569 145.56 0.0615
2020-08-05 2020-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 317,947 -169,090 -34.72 11,634 0.22 0.0259
2020-05-06 2020-03-31 13F/A-1 Marathon Petroleum Common Stock 56585A102 487,037 927 0.19 11,608 -60.22 0.0301
2020-05-06 2020-03-31 13F Marathon Petroleum Common Stock 56585A102 487,037 927 11,608 6,339.8277
2020-01-29 2019-12-31 13F Marathon Petroleum Common Stock 56585A102 486,110 -61,713 -11.27 29,182 -13.03 0.0543
2019-11-01 2019-09-30 13F Marathon Petroleum Common Stock 56585A102 547,823 -328,164 -37.46 33,554 -31.02 0.0651
2019-08-09 2019-06-30 13F Marathon Petroleum Common Stock 56585A102 875,987 -12,317 -1.39 48,641 -8.91 0.0908
2019-05-13 2019-03-31 13F Marathon Petroleum Common Stock 56585A102 888,304 64,783 7.87 53,400 10.29 0.0987
2019-02-11 2018-12-31 13F Marathon Petroleum Common Stock 56585A102 823,521 -164,742 -16.67 48,420 -39.20 0.1084
2018-10-26 2018-09-30 13F Marathon Petroleum Common Stock 56585A102 988,263 35,671 3.74 79,632 19.43 0.1509
2018-08-08 2018-06-30 13F MARATHON PETROLEUM CORP Common Stock 56585A102 952,592 -155,071 -14.00 66,674 -17.49 0.1391
2018-05-11 2018-03-31 13F MARATHON PETE CORP COM Common Stocks 56585A102 1,107,663 203,548 22.51 80,806 34.65 0.1368
2018-02-06 2017-12-31 13F MARATHON PETE CORP COM Common Stocks 56585A102 904,115 94,549 11.68 60,012 32.20 0.1007
2017-11-07 2017-09-30 13F MARATHON PETE CORP COM Common Stocks 56585A102 809,566 -57,095 -6.59 45,395 0.08 0.0776
2017-07-25 2017-06-30 13F MARATHON PETE CORP COM Common Stocks 56585A102 866,661 119,086 15.93 45,359 20.04 0.0805
2017-04-26 2017-03-31 13F MARATHON PETE CORP COM Common Stocks 56585A102 747,575 93,253 14.25 37,786 14.50 0.0693
2017-01-23 2016-12-31 13F MARATHON PETE CORP COM Common Stocks 56585A102 654,322 654,322 33,001 0.0644
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.