Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionGlenview Trust Co
Latest Disclosed Ownership4,648 shares
Latest Disclosed Value $ 1,134,948
Glenview Trust Co reports 13.36% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 8, 2026 - Glenview Trust Co filed a 13F-HR form disclosing ownership of 4,648 shares of Marathon Petroleum Corporation (US:MPC) valued at $1,134,949 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 5,365 shares of Marathon Petroleum Corporation. This represents a change in shares of -13.36% during the quarter. The current value of the position is $1,241,992 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)
2026-05-08 2026-03-31 13F MARATHON PETE COM 56585A102 4,648 -717 -13.36 1,135 30.05 0.0092
2026-02-09 2025-12-31 13F MARATHON PETE COM 56585A102 5,365 -122 -2.22 873 -17.50 0.0135
2025-11-07 2025-09-30 13F MARATHON PETE COM 56585A102 5,487 -111 -1.98 1,058 13.78 0.0168
2025-08-14 2025-06-30 13F MARATHON PETE COM 56585A102 5,598 1,799 47.35 930 67.99 0.0161
2025-05-20 2025-03-31 13F/A-1 MARATHON PETE COM 56585A102 3,799 -2,249 -37.19 553 -34.40 0.0108
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 6,048 0 844 0.0082
2025-02-10 2024-12-31 13F MARATHON PETE COM 56585A102 6,048 -216 -3.45 844 -17.35 0.0158
2024-11-12 2024-09-30 13F MARATHON PETE COM 56585A102 6,264 363 6.15 1,020 -0.29 0.0196
2024-08-14 2024-06-30 13F MARATHON PETE COM 56585A102 5,901 0 0.00 1,024 -13.96 0.0206
2024-05-14 2024-03-31 13F MARATHON PETE COM 56585A102 5,901 206 3.62 1,189 40.88 0.0255
2024-02-12 2023-12-31 13F MARATHON PETE COM 56585A102 5,695 50 0.89 845 -1.17 0.0207
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 5,645 854 17.83 854 53.05 0.0236
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 4,791 453 10.44 559 -4.45 0.0152
2023-05-09 2023-03-31 13F MARATHON PETE COM 56585A102 4,338 360 9.05 585 26.41 0.0175
2023-02-08 2022-12-31 13F MARATHON PETE COM 56585A102 3,978 -191 -4.58 463 11.33 0.0153
2022-11-04 2022-09-30 13F MARATHON PETE COM 56585A102 4,169 0 0.00 415 20.99 0.0157
2022-08-10 2022-06-30 13F MARATHON PETE COM 56585A102 4,169 89 2.18 343 -1.72 0.0126
2022-05-11 2022-03-31 13F MARATHON PETE COM 56585A102 4,080 4,080 349 0.0113
2020-04-28 2020-03-31 13F MARATHON PETE COM 56585A102 0 -7,938 -100.00 0 -100.00
2020-02-06 2019-12-31 13F MARATHON PETE COM 56585A102 7,938 -92 -1.15 478 -2.05 0.0267
2019-11-14 2019-09-30 13F MARATHON PETE COM 56585A102 8,030 2,117 35.80 488 47.88 0.0295
2019-08-08 2019-06-30 13F MARATHON PETE COM 56585A102 5,913 322 5.76 330 -1.49 0.0205
2019-05-14 2019-03-31 13F MARATHON PETE COM 56585A102 5,591 -978 -14.89 335 -13.66 0.0215
2019-02-14 2018-12-31 13F MARATHON PETE COM 56585A102 6,569 900 15.88 388 -14.35 0.0287
2018-11-14 2018-09-30 13F MARATHON PETE COM 56585A102 5,669 726 14.69 453 30.55 0.0286
2018-08-10 2018-06-30 13F MARATHON PETE COM 56585A102 4,943 250 5.33 347 1.17 0.0258
2018-05-15 2018-03-31 13F/A-1 MARATHON PETE COM 56585A102 4,693 -50 -1.05 343 9.58 0.0237
2018-05-14 2018-03-31 13F MARATHON PETE COM 56585A102 4,693 343
2018-02-06 2017-12-31 13F MARATHON PETE COM 56585A102 4,743 -20 -0.42 313 17.23 0.0216
2017-11-07 2017-09-30 13F MARATHON PETE COM 56585A102 4,763 4,763 267 0.0196
2017-08-11 2017-06-30 13F MARATHON PETE COM 56585A102 0 -5,768 -100.00 0 -100.00
2017-05-10 2017-03-31 13F MARATHON PETE COM 56585A102 5,768 -700 -10.82 292 -10.43 0.0231
2017-02-14 2016-12-31 13F/A-1 MARATHON PETE COM 56585A102 6,468 2,556 65.34 326 60.59 0.0270
2017-02-10 2016-12-31 13F MARATHON PETE COM 56585A102 6,468 326
2017-04-28 2015-12-31 13F MARATHON PETE COM 56585A102 3,912 3,912 203 0.0211
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.