Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionCNB Bank
Latest Disclosed Ownership560 shares
Latest Disclosed Value $ 136,741
CNB Bank ownership in MPC / Marathon Petroleum Corporation

On May 6, 2026 - CNB Bank filed a 13F-HR form disclosing ownership of 560 shares of Marathon Petroleum Corporation (US:MPC) valued at $136,741 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 560 shares of Marathon Petroleum Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $149,638 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)
2026-05-06 2026-03-31 13F MARATHON PETE COM 56585A102 560 0 0.00 137 49.45 0.0575
2026-02-11 2025-12-31 13F MARATHON PETE COM 56585A102 560 0 0.00 91 -14.95 0.0373
2025-10-30 2025-09-30 13F MARATHON PETE COM 56585A102 560 0 0.00 108 15.05 0.0450
2025-07-31 2025-06-30 13F MARATHON PETE COM 56585A102 560 0 0.00 93 14.81 0.0441
2025-04-24 2025-03-31 13F MARATHON PETE COM 56585A102 560 0 0.00 82 3.85 0.0413
2025-01-15 2024-12-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 78 -14.29 0.0363
2024-10-18 2024-09-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 91 -6.19 0.0422
2024-08-08 2024-06-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 97 -13.39 0.0467
2024-05-02 2024-03-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 113 34.94 0.0550
2024-01-31 2023-12-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 83 -1.19 0.0446
2023-11-02 2023-09-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 85 29.23 0.0499
2023-08-08 2023-06-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 65 -13.33 0.0384
2023-05-10 2023-03-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 76 15.38 0.0460
2023-02-13 2022-12-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 65 16.07 0.0407
2022-11-14 2022-09-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 56 21.74 0.0379
2022-08-19 2022-06-30 13F/A-1 Marathon Petroleum COM 56585A102 560 0 0.00 46 -4.17 0.0298
2022-08-10 2022-06-30 13F Marathon Petroleum COM 56585A102 560 0 46 0.0190
2022-04-13 2022-03-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 48 33.33 0.0266
2022-01-31 2021-12-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 36 2.86 0.0197
2021-11-02 2021-09-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 35 2.94 0.0210
2021-07-29 2021-06-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 34 13.33 0.0213
2021-05-03 2021-03-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 30 30.43 0.0208
2021-01-27 2020-12-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 23 43.75 0.0174
2020-10-26 2020-09-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 16 -23.81 0.0135
2020-07-14 2020-06-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 21 -58.00 0.0185
2020-05-13 2020-03-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 50 0.00 0.0539
2020-01-27 2019-12-31 13F Marathon Petroleum COM 56585A102 560 0 0.00 50 0.00 0.0423
2019-11-04 2019-09-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 50 0.00 0.0463
2019-08-14 2019-06-30 13F Marathon Petroleum COM 56585A102 560 0 0.00 50 0.00 0.0427
2019-04-29 2019-03-31 13F Marathon Petroleum COM 56585A102 560 528 1,650.00 50 1,566.67 0.0258
2019-02-06 2018-12-31 13F Marathon Petroleum COM 56585A102 32 32 3 0.0019
2018-05-11 2018-03-31 13F Marathon Petroleum COM 56585A102 0 -27 -100.00 0 -100.00
2018-02-20 2017-12-31 13F Marathon Petroleum COM 56585A102 27 27 2 0.0012
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.