Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionPinnacle Bancorp, Inc.
Latest Disclosed Ownership2,200 shares
Latest Disclosed Value $ 537,196
Pinnacle Bancorp, Inc. ownership in MPC / Marathon Petroleum Corporation

On April 22, 2026 - Pinnacle Bancorp, Inc. filed a 13F-HR form disclosing ownership of 2,200 shares of Marathon Petroleum Corporation (MX:MPC) valued at $537,196 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 2,200 shares of Marathon Petroleum Corporation. This represents a change in shares of 0.00% 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)
2026-04-22 2026-03-31 13F Marathon Pete Corp Com COM 56585A102 2,200 0 0.00 537 50.42 0.1585
2026-01-22 2025-12-31 13F Marathon Pete Corp Com COM 56585A102 2,200 0 0.00 358 -15.80 0.1049
2025-10-24 2025-09-30 13F Marathon Pete Corp Com COM 56585A102 2,200 0 0.00 424 16.16 0.1252
2025-07-11 2025-06-30 13F Marathon Pete Corp Com COM 56585A102 2,200 -109 -4.72 365 8.63 0.1128
2025-04-23 2025-03-31 13F Marathon Pete Corp Com COM 56585A102 2,309 0 0.00 336 4.35 0.1097
2025-01-14 2024-12-31 13F Marathon Pete Corp Com COM 56585A102 2,309 0 0.00 322 -14.36 0.1048
2024-10-09 2024-09-30 13F Marathon Pete Corp Com COM 56585A102 2,309 0 0.00 376 -6.00 0.1006
2024-07-15 2024-06-30 13F Marathon Pete Corp Com COM 56585A102 2,309 40 1.76 401 -12.47 0.1183
2024-04-16 2024-03-31 13F Marathon Pete Corp Com COM 56585A102 2,269 0 0.00 457 36.01 0.1352
2024-01-25 2023-12-31 13F Marathon Pete Corp Com COM 56585A102 2,269 -690 -23.32 337 -24.83 0.1102
2023-10-18 2023-09-30 13F Marathon Pete Corp Com COM 56585A102 2,959 0 0.00 448 29.57 0.1592
2023-07-14 2023-06-30 13F Marathon Pete Corp Com COM 56585A102 2,959 0 0.00 345 -13.32 0.1180
2023-04-14 2023-03-31 13F Marathon Pete Corp Com COM 56585A102 2,959 0 0.00 399 0.1464
2023-01-24 2022-12-31 13F Marathon Pete Corp Com COM 56585A102 2,959 -185 -5.88 0 -100.00 0.1323
2022-10-25 2022-09-30 13F Marathon Pete Corp Com COM 56585A102 3,144 -163 -4.93 312 14.71 0.1347
2022-07-12 2022-06-30 13F Marathon Pete Corp Com COM 56585A102 3,307 0 0.00 272 -3.89 0.1119
2022-04-14 2022-03-31 13F Marathon Pete Corp Com COM 56585A102 3,307 -122 -3.56 283 29.22 0.0982
2022-01-19 2021-12-31 13F Marathon Pete Corp Com COM 56585A102 3,429 0 0.00 219 3.30 0.0774
2021-10-12 2021-09-30 13F Marathon Pete Corp Com COM 56585A102 3,429 0 0.00 212 2.42 0.0848
2021-07-15 2021-06-30 13F Marathon Pete Corp Com COM 56585A102 3,429 0 0.00 207 13.11 0.0944
2021-04-26 2021-03-31 13F Marathon Pete Corp Com COM 56585A102 3,429 913 36.29 183 75.96 0.0887
2021-01-13 2020-12-31 13F Marathon Pete Corp Com COM 56585A102 2,516 -643 -20.35 104 11.83 0.0641
2020-10-13 2020-09-30 13F Marathon Pete Corp Com COM 56585A102 3,159 778 32.68 93 4.49 0.0656
2020-07-07 2020-06-30 13F Marathon Pete Corp Com COM 56585A102 2,381 0 0.00 89 58.93 0.0662
2020-04-09 2020-03-31 13F Marathon Pete Corp Com COM 56585A102 2,381 -141 -5.59 56 -63.16 0.0478
2020-01-10 2019-12-31 13F Marathon Pete Corp Com COM 56585A102 2,522 -102 -3.89 152 -4.40 0.1053
2019-10-08 2019-09-30 13F Marathon Pete Corp Com COM 56585A102 2,624 102 4.04 159 12.77 0.0908
2019-07-08 2019-06-30 13F Marathon Pete Corp Com COM 56585A102 2,522 0 0.00 141 -6.62 0.0792
2019-04-05 2019-03-31 13F Marathon Pete Corp Com COM 56585A102 2,522 -187 -6.90 151 -5.62 0.0876
2019-03-20 2018-12-31 13F Marathon Pete Corp Com COM 56585A102 2,709 259 10.57 160 29.03 0.0984
2017-04-17 2017-03-31 13F Marathon Pete Corp Com COM 56585A102 2,450 2,450 124 0.0877
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.