Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionRafferty Asset Management, LLC
Latest Disclosed Ownership87,884 shares
Latest Disclosed Value $ 21,459,515
Rafferty Asset Management, LLC reports 5.50% increase in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Rafferty Asset Management, LLC filed a 13F-HR form disclosing ownership of 87,884 shares of Marathon Petroleum Corporation (MX:MPC) valued at $21,459,515 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 83,303 shares of Marathon Petroleum Corporation. This represents a change in shares of 5.50% 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)
2026-05-15 2026-03-31 13F MARATHON PETE COM 56585A102 87,884 4,581 5.50 21,460 58.40 0.0871
2026-02-13 2025-12-31 13F MARATHON PETE COM 56585A102 83,303 -5,445 -6.14 13,548 -20.80 0.0468
2025-11-12 2025-09-30 13F MARATHON PETE COM 56585A102 88,748 -7,132 -7.44 17,105 7.40 0.0555
2025-08-14 2025-06-30 13F MARATHON PETE COM 56585A102 95,880 -4,180 -4.18 15,927 9.25 0.0525
2025-05-14 2025-03-31 13F MARATHON PETE COM 56585A102 100,060 -16,606 -14.23 14,578 -10.43 0.0622
2025-02-14 2024-12-31 13F MARATHON PETE COM 56585A102 116,666 1,132 0.98 16,275 -13.53 0.0576
2024-11-13 2024-09-30 13F MARATHON PETE COM 56585A102 115,534 -8,469 -6.83 18,822 -12.51 0.0645
2024-08-13 2024-06-30 13F MARATHON PETE COM 56585A102 124,003 8,030 6.92 21,512 -7.94 0.0799
2024-05-13 2024-03-31 13F MARATHON PETE COM 56585A102 115,973 -32,407 -21.84 23,369 6.16 0.0872
2024-02-13 2023-12-31 13F MARATHON PETE COM 56585A102 148,380 -4,880 -3.18 22,014 -5.09 0.0928
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 153,260 -36,903 -19.41 23,194 4.60 0.1363
2023-08-11 2023-06-30 13F MARATHON PETE COM 56585A102 190,163 -14,280 -6.98 22,173 -19.56 0.1250
2023-05-11 2023-03-31 13F MARATHON PETE COM 56585A102 204,443 -36,067 -15.00 27,565 -1.53 0.1868
2023-02-13 2022-12-31 13F MARATHON PETE COM 56585A102 240,510 7,643 3.28 27,993 21.02 0.2344
2022-11-14 2022-09-30 13F MARATHON PETE COM 56585A102 232,867 -63,474 -21.42 23,131 -5.05 0.2462
2022-08-12 2022-06-30 13F MARATHON PETE COM 56585A102 296,341 -90,764 -23.45 24,362 -26.39 0.2242
2022-05-13 2022-03-31 13F MARATHON PETE COM 56585A102 387,105 -19,451 -4.78 33,097 27.22 0.1962
2022-02-10 2021-12-31 13F MARATHON PETE COM 56585A102 406,556 -535 -0.13 26,016 3.39 0.1369
2021-11-10 2021-09-30 13F MARATHON PETE COM 56585A102 407,091 -114,288 -21.92 25,162 -20.13 0.1719
2021-08-10 2021-06-30 13F MARATHON PETE COM 56585A102 521,379 172,057 49.25 31,502 68.60 0.1984
2021-05-10 2021-03-31 13F MARATHON PETE COM 56585A102 349,322 43,099 14.07 18,685 47.53 0.1277
2021-02-10 2020-12-31 13F MARATHON PETE COM 56585A102 306,223 81,539 36.29 12,665 92.13 0.1238
2020-11-13 2020-09-30 13F MARATHON PETE COM 56585A102 224,684 -27,043 -10.74 6,592 -29.95 0.0797
2020-08-07 2020-06-30 13F MARATHON PETE COM 56585A102 251,727 184,931 276.86 9,410 496.32 0.1326
2020-05-15 2020-03-31 13F MARATHON PETE COM 56585A102 66,796 -91,272 -57.74 1,578 -83.43 0.0661
2020-02-10 2019-12-31 13F MARATHON PETE COM 56585A102 158,068 -60,933 -27.82 9,524 -28.41 0.1465
2019-11-14 2019-09-30 13F MARATHON PETE COM 56585A102 219,001 52,842 31.80 13,304 43.28 0.2081
2019-08-09 2019-06-30 13F MARATHON PETE COM 56585A102 166,159 124,629 300.09 9,285 273.49 0.1632
2019-05-15 2019-03-31 13F MARATHON PETE COM 56585A102 41,530 5,432 15.05 2,486 16.71 0.0400
2019-02-11 2018-12-31 13F MARATHON PETE COM 56585A102 36,098 36,098 2,130 0.0465
2018-02-14 2017-12-31 13F MARATHON PETE COM 56585A102 0 -48,188 -100.00 0 -100.00
2017-11-13 2017-09-30 13F MARATHON PETE COM 56585A102 48,188 48,188 2,702 0.0606
2017-02-13 2016-12-31 13F MARATHON PETE COM 56585A102 0 -87,051 -100.00 0 -100.00
2016-11-14 2016-09-30 13F MARATHON PETE COM 56585A102 87,051 87,051 0.00 3,533 0.1290
2016-05-12 2016-03-31 13F MARATHON PETE COM 56585A102 0 0 0 0.0000
2016-02-12 2015-12-31 13F MARATHON PETE COM 56585A102 0 -51,249 -100.00 0 -100.00
2015-11-12 2015-09-30 13F MARATHON PETE COM 56585A102 51,249 18,632 57.12 2,374 39.16 0.1875
2015-08-12 2015-06-30 13F MARATHON PETE COM 56585A102 32,617 22,251 214.65 1,706 60.79 0.1145
2015-05-14 2015-03-31 13F MARATHON PETE COM 56585A102 10,366 10,366 1,061 0.0800
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.