Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAncora Advisors, LLC
Latest Disclosed Ownership9,255 shares
Latest Disclosed Value $ 2,259,942
Ancora Advisors, LLC reports 0.55% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Ancora Advisors, LLC filed a 13F-HR form disclosing ownership of 9,255 shares of Marathon Petroleum Corporation (MX:MPC) valued at $2,259,942 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 9,306 shares of Marathon Petroleum Corporation. This represents a change in shares of -0.55% 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)
2026-05-15 2026-03-31 13F MARATHON PETROLEUM COM 56585A102 9,255 -51 -0.55 2,260 49.31 0.0283
2026-02-17 2025-12-31 13F MARATHON PETROLEUM COM 56585A102 9,306 170 1.86 1,513 -14.03 0.0312
2025-11-14 2025-09-30 13F MARATHON PETROLEUM COM 56585A102 9,136 -420 -4.40 1,761 10.90 0.0352
2025-08-14 2025-06-30 13F MARATHON PETROLEUM COM 56585A102 9,556 -313 -3.17 1,587 10.44 0.0329
2025-05-15 2025-03-31 13F MARATHON PETROLEUM COM 56585A102 9,869 -268 -2.64 1,438 1.63 0.0321
2025-02-14 2024-12-31 13F MARATHON PETROLEUM COM 56585A102 10,137 -1,352 -11.77 1,414 -24.43 0.0315
2024-11-14 2024-09-30 13F MARATHON PETROLEUM COM 56585A102 11,489 -101 -0.87 1,872 -6.92 0.0426
2024-08-14 2024-06-30 13F MARATHON PETROLEUM COM 56585A102 11,590 -381 -3.18 2,011 -16.67 0.0498
2024-05-16 2024-03-31 13F MARATHON PETROLEUM COM 56585A102 11,971 -1,472 -10.95 2,412 20.96 0.0548
2024-02-14 2023-12-31 13F MARATHON PETROLEUM COM 56585A102 13,443 -1,686 -11.14 1,994 -12.89 0.0468
2023-11-14 2023-09-30 13F MARATHON PETROLEUM COM 56585A102 15,129 157 1.05 2,290 31.17 0.0608
2023-08-14 2023-06-30 13F MARATHON PETROLEUM COM 56585A102 14,972 10 0.07 1,746 -13.49 0.0459
2023-05-16 2023-03-31 13F MARATHON PETROLEUM COM 56585A102 14,962 -155 -1.03 2,017 14.60 0.0572
2023-02-14 2022-12-31 13F MARATHON PETROLEUM COM 56585A102 15,117 -265 -1.72 1,760 15.18 0.0507
2022-11-14 2022-09-30 13F MARATHON PETROLEUM COM 56585A102 15,382 -203 -1.30 1,528 19.28 0.0472
2022-08-15 2022-06-30 13F MARATHON PETROLEUM COM 56585A102 15,585 -6,970 -30.90 1,281 -33.59 0.0361
2022-05-16 2022-03-31 13F/A-1 MARATHON PETROLEUM COM 56585A102 22,555 -2,129 -8.63 1,929 22.09 0.0468
2022-05-13 2022-03-31 13F MARATHON PETROLEUM COM 56585A102 27,025 2,341 1,446 0.0249
2022-02-14 2021-12-31 13F MARATHON PETROLEUM COM 56585A102 24,684 322 1.32 1,580 4.91 0.0375
2021-11-15 2021-09-30 13F MARATHON PETROLEUM COM 56585A102 24,362 -284 -1.15 1,506 1.14 0.0389
2021-11-12 2021-06-30 13F/A-1 MARATHON PETROLEUM COM 56585A102 24,646 -2,379 -8.80 1,489 2.97 0.0389
2021-08-13 2021-06-30 13F MARATHON PETROLEUM COM 56585A102 24,646 -2,379 1,489 0.0389
2021-11-12 2021-03-31 13F/A-1 MARATHON PETROLEUM COM 56585A102 27,025 4,282 18.83 1,446 53.83 0.0399
2021-05-14 2021-03-31 13F MARATHON PETROLEUM COM 56585A102 27,025 4,282 1,446 0.0399
2021-11-12 2020-12-31 13F/A-1 MARATHON PETROLEUM COM 56585A102 22,743 -4,643 -16.95 940 16.92 0.0303
2021-02-12 2020-12-31 13F MARATHON PETROLEUM COM 56585A102 22,743 -4,643 940 0.0303
2021-11-12 2020-09-30 13F/A-1 MARATHON PETROLEUM COM 56585A102 27,386 -497 -1.78 804 -22.91 0.0319
2020-11-13 2020-09-30 13F MARATHON PETROLEUM COM 56585A102 27,386 -497 804 0.0319
2021-11-12 2020-06-30 13F/A-1 MARATHON PETROLEUM COM 56585A102 27,883 -346,615 -92.55 1,043 -88.21 0.0437
2020-08-14 2020-06-30 13F MARATHON PETROLEUM COM 56585A102 27,883 -346,615 1,043 0.0437
2021-11-12 2020-03-31 13F/A-1 MARATHON PETROLEUM COM 56585A102 374,498 49,759 15.32 8,846 -54.79 0.4091
2020-05-14 2020-03-31 13F MARATHON PETROLEUM COM 56585A102 374,498 49,759 8,846 0.4091
2020-02-14 2019-12-31 13F MARATHON PETROLEUM COM 56585A102 324,739 -4,376 -1.33 19,565 -2.15 0.7280
2019-11-19 2019-09-30 13F/A-2 MARATHON PETROLEUM COM 56585A102 329,115 22,372 7.29 19,994 16.64 0.8724
2019-11-18 2019-09-30 13F/A-1 MARATHON PETROLEUM COM 56585A102 329,115 22,372 19,994 0.8724
2019-11-14 2019-09-30 13F MARATHON PETROLEUM COM 56585A102 329,115 22,372 19,994 0.8767
2019-11-14 2019-06-30 13F/A-1 MARATHON PETROLEUM COM 56585A102 306,743 41,106 15.47 17,141 7.82 0.7685
2019-08-12 2019-06-30 13F MARATHON PETROLEUM COM 56585A102 306,743 41,106 17,141 707,997.1335
2019-11-14 2019-03-31 13F/A-1 MARATHON PETROLEUM COM 56585A102 265,637 75,238 39.52 15,898 41.49 0.7214
2019-05-15 2019-03-31 13F MARATHON PETROLEUM COM 56585A102 265,637 75,238 15,898 662,285.5893
2019-11-14 2018-12-31 13F/A-1 MARATHON PETROLEUM COM 56585A102 190,399 36,860 24.01 11,236 -8.49 0.5403
2019-02-14 2018-12-31 13F MARATHON PETROLEUM COM 56585A102 190,399 36,860 11,236
2018-11-13 2018-09-30 13F MARATHON PETROLEUM COM 56585A102 153,539 20,585 15.48 12,278 31.63 0.4730
2018-08-10 2018-06-30 13F MARATHON PETROLEUM COM 56585A102 132,954 -692 -0.52 9,328 -4.52 0.4051
2018-05-15 2018-03-31 13F MARATHON PETROLEUM COM 56585A102 133,646 17,782 15.35 9,770 27.80 0.4396
2018-02-14 2017-12-31 13F MARATHON PETROLEUM COM 56585A102 115,864 26,047 29.00 7,645 51.81 0.4079
2017-11-14 2017-09-30 13F MARATHON PETROLEUM COM 56585A102 89,817 10,527 13.28 5,036 21.38 0.2919
2017-08-14 2017-06-30 13F MARATHON PETROLEUM COM 56585A102 79,290 12,652 18.99 4,149 23.23 0.2687
2017-05-15 2017-03-31 13F MARATHON PETROLEUM COM 56585A102 66,638 60,413 970.49 3,367 975.72 0.2280
2017-02-14 2016-12-31 13F MARATHON PETE COM 56585A102 6,225 6,225 313 0.0228
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.