Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionSunbelt Securities, Inc.
Latest Disclosed Ownership9,053 shares
Latest Disclosed Value $ 2,210,451
Sunbelt Securities, Inc. reports 1.84% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 16, 2026 - Sunbelt Securities, Inc. filed a 13F-HR form disclosing ownership of 9,053 shares of Marathon Petroleum Corporation (US:MPC) valued at $2,210,562 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 20, 2026 disclosing 9,223 shares of Marathon Petroleum Corporation. This represents a change in shares of -1.84% during the quarter. The current value of the position is $2,419,052 USD.

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)
2026-05-16 2026-03-31 13F MARATHON PETE CORP COM Stock 56585A102 9,053 -170 -1.84 2,210 47.43 0.1395
2026-02-20 2025-12-31 13F MARATHON PETE CORP COM Stock 56585A102 9,223 -190 -2.02 1,500 -17.36 0.1000
2025-11-19 2025-09-30 13F MARATHON PETE CORP COM Stock 56585A102 9,413 -8,993 -48.86 1,814 -29.33 0.1253
2025-08-14 2025-06-30 13F MARATHON PETE CORP COM Stock 56585A102 18,406 3,828 26.26 2,568 20.91 0.2267
2025-04-24 2025-03-31 13F UNITED AIRLS HLDGS INC COM Stock 56585A102 14,578 -3,828 -20.80 2,124 -14.91 0.1896
2025-02-18 2024-12-31 13F MARATHON PETE CORP COM Stock 56585A102 18,406 -119 -0.64 2,496 -17.30 0.2199
2024-11-18 2024-09-30 13F MARATHON PETE CORP COM Stock 56585A102 18,525 -1,079 -5.50 3,018 -11.26 0.2959
2024-08-16 2024-06-30 13F MARATHON PETE CORP COM Stock 56585A102 19,604 2,831 16.88 3,401 0.62 0.3479
2024-04-15 2024-03-31 13F MARATHON PETE CORP COM Stock 56585A102 16,773 335 2.04 3,380 38.60 0.3771
2024-02-15 2023-12-31 13F MARATHON PETE CORP COM Stock 56585A102 16,438 -742 -4.32 2,439 -6.23 0.3071
2023-12-11 2023-09-30 13F MARATHON PETE CORP COM Stock 56585A102 17,180 1,631 10.49 2,600 43.49 0.3598
2023-08-16 2023-06-30 13F MARATHON PETE CORP COM Stock 56585A102 15,549 -1,703 -9.87 1,813 -21.56 0.2607
2023-05-17 2023-03-31 13F MARATHON PETE CORP COM Stock 56585A102 17,252 360 2.13 2,311 17.50 0.3716
2023-02-08 2022-12-31 13F MARATHON PETE COM 56585A102 16,892 180 1.08 1,966 18.43 0.3841
2022-11-21 2022-09-30 13F MARATHON PETE COM 56585A102 16,712 -384 -2.25 1,660 18.15 0.3509
2022-10-03 2022-06-30 13F MARATHON PETE COM 56585A102 17,096 151 0.89 1,405 -2.84 0.2972
2022-05-16 2022-03-31 13F MARATHON PETE COM 56585A102 16,945 -20,553 -54.81 1,446 -51.36 0.2647
2022-02-14 2021-12-31 13F MARATHON PETE COM 56585A102 37,498 -10,878 -22.49 2,973 15.41 0.4829
2021-11-15 2021-09-30 13F MARATHON PETE COM 56585A102 48,376 0 0.00 2,576 0.00 0.4631
2021-07-29 2021-06-30 13F MARATHON PETE COM 56585A102 48,376 2,748 6.02 2,576 5.53 0.4637
2021-05-27 2021-03-31 13F MARATHON PETE COM 56585A102 45,628 8,563 23.10 2,441 59.23 0.4808
2021-02-09 2020-12-31 13F MARATHON PETE COM 56585A102 37,065 10,871 41.50 1,533 99.35 0.3168
2020-11-17 2020-09-30 13F MARATHON PETE COM 56585A102 26,194 -255 -0.96 769 -22.24 0.2138
2020-08-14 2020-06-30 13F MARATHON PETE COM 56585A102 26,449 2,703 11.38 989 76.29 0.3398
2020-05-15 2020-03-31 13F MARATHON PETE COM 56585A102 23,746 -34,577 -59.29 561 -84.04 0.0240
2020-02-26 2019-12-31 13F/A-1 MARATHON PETE COM 56585A102 58,323 16,160 38.33 3,514 37.21 0.3699
2020-02-14 2019-12-31 13F MARATHON PETE COM 56585A102 58,323 16,160 878 346.5103
2019-11-15 2019-09-30 13F MARATHON PETE COM 56585A102 42,163 35,687 551.07 2,561 607.46 0.2872
2019-08-01 2019-06-30 13F MARATHON PETE COM 56585A102 6,476 6,476 362 0.1574
2017-05-05 2017-03-31 13F MARATHON PETE COM 56585A102 0 -340 -100.00 0 -100.00
2017-02-13 2016-12-31 13F MARATHON PETE COM 56585A102 340 340 0.00 17 0.0209
2016-11-14 2016-09-30 13F MARATHON PETE COM 56585A102 0 -340 -100.00 0 -100.00
2016-08-11 2016-06-30 13F MARATHON PETE COM 56585A102 340 0 0.00 13 0.00 0.0135
2016-05-11 2016-03-31 13F MARATHON PETE COM 56585A102 340 0 0.00 13 -29.41 0.0147
2016-02-11 2015-12-31 13F MARATHON PETE COM 56585A102 340 -200 -37.04 18 -32.00 0.0197
2015-11-12 2015-09-30 13F MARATHON PETE COM 56585A102 540 0 0.00 25 -10.71 0.0265
2015-08-13 2015-06-30 13F MARATHON PETE COM 56585A102 540 440 440.00 28 180.00 0.0301
2015-05-19 2015-03-31 13F/A-1 MARATHON PETE COM 56585A102 100 100 10 0.0118
2015-05-14 2015-03-31 13F MARATHON PETE COM 56585A102 100 10
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.