Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAtlantic Union Bankshares Corp
Latest Disclosed Ownership19,699 shares
Latest Disclosed Value $ 4,810,068
Atlantic Union Bankshares Corp reports 36.40% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 12, 2026 - Atlantic Union Bankshares Corp filed a 13F-HR form disclosing ownership of 19,699 shares of Marathon Petroleum Corporation (MX:MPC) valued at $4,810,068 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 30,971 shares of Marathon Petroleum Corporation. This represents a change in shares of -36.40% 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)
2026-05-12 2026-03-31 13F MARATHON PETE COM 56585A102 19,699 -11,272 -36.40 4,810 -4.49 0.0350
2026-02-04 2025-12-31 13F MARATHON PETE COM 56585A102 30,971 -545 -1.73 5,037 -17.09 0.0945
2025-11-04 2025-09-30 13F MARATHON PETE COM 56585A102 31,516 1,307 4.33 6,074 21.07 0.1144
2025-08-06 2025-06-30 13F MARATHON PETE Stock 56585A102 30,209 1,691 5.93 5,018 20.78 0.1146
2025-05-05 2025-03-31 13F MARATHON PETE CORP COM Stock 56585A102 28,518 -388 -1.34 4,155 3.03 0.2514
2025-02-07 2024-12-31 13F MARATHON PETE CORP COM Stock 56585A102 28,906 429 1.51 4,032 -13.08 0.2347
2024-11-14 2024-09-30 13F MARATHON PETE CORP COM Stock 56585A102 28,477 1,843 6.92 4,639 0.41 0.2695
2024-07-24 2024-06-30 13F MARATHON PETE CORP COM Stock 56585A102 26,634 7,325 37.94 4,620 18.77 0.2881
2024-04-16 2024-03-31 13F MARATHON PETE CORP COM Stock 56585A102 19,309 1,095 6.01 3,891 43.97 0.3278
2024-01-19 2023-12-31 13F MARATHON PETE CORP COM Stock 56585A102 18,214 1,853 11.33 2,702 9.13 0.2504
2023-10-20 2023-09-30 13F MARATHON PETE CORP COM Stock 56585A102 16,361 1,376 9.18 2,476 41.73 0.2537
2023-07-11 2023-06-30 13F MARATHON PETE CORP COM Stock 56585A102 14,985 6,902 85.39 1,747 60.42 0.1742
2023-05-08 2023-03-31 13F MARATHON PETE CORP COM Stock 56585A102 8,083 1,928 31.32 1,090 52.09 0.1134
2023-02-09 2022-12-31 13F MARATHON PETE CORP COM Stock 56585A102 6,155 0 0.00 716 17.18 0.0767
2022-10-25 2022-09-30 13F MARATHON PETE CORP COM COM 56585A102 6,155 -380 -5.81 611 13.78 0.0701
2022-07-21 2022-06-30 13F MARATHON PETE CORP COM COM 56585A102 6,535 -370 -5.36 537 -8.98 0.0549
2022-04-26 2022-03-31 13F MARATHON PETE CORP COM COM 56585A102 6,905 0 0.00 590 33.48 0.0516
2022-01-19 2021-12-31 13F MARATHON PETE CORP COM COM 56585A102 6,905 -455 -6.18 442 -2.86 0.0375
2021-10-26 2021-09-30 13F MARATHON PETE CORP COM COM 56585A102 7,360 -4,124 -35.91 455 -34.44 0.0428
2021-07-26 2021-06-30 13F MARATHON PETE CORP COM COM 56585A102 11,484 3,744 48.37 694 67.63 0.0670
2021-05-04 2021-03-31 13F MARATHON PETE CORP COM COM 56585A102 7,740 839 12.16 414 45.26 0.0423
2021-02-01 2020-12-31 13F MARATHON PETE COM 56585A102 6,901 51 0.74 285 41.79 0.0296
2020-10-16 2020-09-30 13F MARATHON PETE COM 56585A102 6,850 -275 -3.86 201 -24.44 0.0234
2020-07-15 2020-06-30 13F MARATHON PETE COM 56585A102 7,125 7,125 266 0.0331
2020-04-10 2020-03-31 13F MARATHON PETROLEUM COM 56585A102 0 -9,225 -100.00 0 -100.00
2020-01-14 2019-12-31 13F MARATHON PETROLEUM COM 56585A102 9,225 0 0.00 556 -0.71 0.0713
2019-10-17 2019-09-30 13F MARATHON PETROLEUM COM 56585A102 9,225 -365 -3.81 560 4.48 0.0749
2019-07-23 2019-06-30 13F MARATHON PETROLEUM COM 56585A102 9,590 9,590 536 0.0720
2014-08-05 2014-06-30 13F MARATHON PETE COM 56585A102 0 -166 -100.00 0 -100.00
2014-08-05 2014-03-31 13F/A-1 MARATHON PETE COM 56585A102 166 166 11 0.0050
2014-05-01 2014-03-31 13F MARATHON PETE COM 56585A102 166 11
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.