Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionLevel Four Advisory Services, Llc
Latest Disclosed Ownership14,541 shares
Latest Disclosed Value $ 3,550,727
Level Four Advisory Services, Llc reports 0.79% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 14, 2026 - Level Four Advisory Services, Llc filed a 13F-HR form disclosing ownership of 14,541 shares of Marathon Petroleum Corporation (US:MPC) valued at $3,550,621 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 14,657 shares of Marathon Petroleum Corporation. This represents a change in shares of -0.79% during the quarter. The current value of the position is $3,885,501 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.

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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)
2026-05-14 2026-03-31 13F MARATHON PETE COM 56585A102 14,541 -116 -0.79 3,551 48.97 0.1166
2026-02-13 2025-12-31 13F MARATHON PETE COM 56585A102 14,657 1,538 11.72 2,384 -5.74 0.0780
2025-11-12 2025-09-30 13F MARATHON PETE COM 56585A102 13,119 -46 -0.35 2,529 15.65 0.0866
2025-08-13 2025-06-30 13F MARATHON PETE COM 56585A102 13,165 83 0.63 2,187 14.75 0.0806
2025-05-14 2025-03-31 13F MARATHON PETE COM 56585A102 13,082 -7,279 -35.75 1,906 -32.92 0.0784
2025-02-12 2024-12-31 13F MARATHON PETE COM 56585A102 20,361 -1,504 -6.88 2,840 -10.69 0.1161
2024-11-14 2024-09-30 13F MARATHON PETE COM 56585A102 21,865 1,365 6.66 3,181 -10.57 0.1339
2024-08-09 2024-06-30 13F MARATHON PETE COM 56585A102 20,500 250 1.23 3,556 18.38 0.1603
2024-05-13 2024-03-31 13F MARATHON PETE COM 56585A102 20,250 0 0.00 3,004 0.00 0.1651
2024-02-08 2023-12-31 13F MARATHON PETE COM 56585A102 20,250 -3,878 -16.07 3,004 -17.72 0.1685
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 24,128 2,422 11.16 3,652 44.31 0.2354
2023-07-10 2023-06-30 13F MARATHON PETE COM 56585A102 21,706 -386 -1.75 2,531 -15.04 0.1521
2023-06-05 2023-03-31 13F MARATHON PETE COM 56585A102 22,092 -2,044 -8.47 2,979 6.02 0.1954
2023-02-13 2022-12-31 13F MARATHON PETE COM 56585A102 24,136 10,140 72.45 2,809 102.09 0.2085
2022-11-07 2022-09-30 13F MARATHON PETE COM 56585A102 13,996 -333 -2.32 1,390 18.00 0.1351
2022-08-08 2022-06-30 13F MARATHON PETE COM 56585A102 14,329 2,539 21.54 1,178 16.87 0.1111
2022-05-10 2022-03-31 13F MARATHON PETE COM 56585A102 11,790 -1,497 -11.27 1,008 18.59 0.0790
2022-02-11 2021-12-31 13F MARATHON PETE COM 56585A102 13,287 9,952 298.41 850 312.62 0.0648
2021-10-12 2021-09-30 13F MARATHON PETE COM 56585A102 3,335 3,335 206 0.0214
2020-11-02 2020-09-30 13F MARATHON PETE COM 56585A102 0 -7,880 -100.00 0 -100.00
2020-08-17 2020-06-30 13F/A-1 MARATHON PETE COM 56585A102 7,880 7,880 298 0.0231
2020-05-13 2020-03-31 13F MARATHON PETE COM 56585A102 0 -4,103 -100.00 0 -100.00
2020-02-13 2019-12-31 13F MARATHON PETE COM 56585A102 4,103 4,103 244 0.0097
2019-05-14 2019-03-31 13F MARATHON PETE COM 56585A102 0 -8,515 -100.00 0 -100.00
2019-02-07 2018-12-31 13F MARATHON PETE COM 56585A102 8,515 -1,401 -14.13 502 -36.70 0.0626
2018-11-14 2018-09-30 13F MARATHON PETE COM 56585A102 9,916 -8,578 -46.38 793 -38.91 0.0857
2018-08-14 2018-06-30 13F MARATHON PETE COM 56585A102 18,494 8,867 92.11 1,298 84.38 0.0946
2018-05-14 2018-03-31 13F MARATHON PETE COM 56585A102 9,627 2,041 26.90 704 40.52 0.0546
2018-02-13 2017-12-31 13F MARATHON PETE COM 56585A102 7,586 2,473 48.37 501 74.56 0.0390
2018-04-03 2017-09-30 13F/A-1 MARATHON PETE COM 56585A102 5,113 5,113 287 0.0254
2017-11-15 2017-09-30 13F MARATHON PETE COM 56585A102 5,298 297
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.