Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionEnterprise Financial Services Corp
Latest Disclosed Ownership1,519 shares
Latest Disclosed Value $ 370,908
Enterprise Financial Services Corp reports 10.07% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 5, 2026 - Enterprise Financial Services Corp filed a 13F-HR form disclosing ownership of 1,519 shares of Marathon Petroleum Corporation (US:MPC) valued at $370,909 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 1,689 shares of Marathon Petroleum Corporation. This represents a change in shares of -10.07% during the quarter. The current value of the position is $405,892 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)
2026-05-05 2026-03-31 13F MARATHON PETE COM 56585A102 1,519 -170 -10.07 371 35.04 0.1043
2026-01-14 2025-12-31 13F MARATHON PETE COM 56585A102 1,689 295 21.16 275 2.24 0.1395
2025-10-15 2025-09-30 13F MARATHON PETE COM 56585A102 1,394 -10 -0.71 269 15.02 0.1385
2025-08-12 2025-06-30 13F MARATHON PETE COM 56585A102 1,404 16 1.15 233 15.35 0.1245
2025-05-14 2025-03-31 13F MARATHON PETE COM 56585A102 1,388 1,388 202 0.1196
2025-02-07 2024-12-31 13F MARATHON PETE COM 56585A102 0 -1,391 -100.00 0 -100.00
2024-11-12 2024-09-30 13F MARATHON PETE COM 56585A102 1,391 -47 -3.27 227 -9.24 0.1321
2024-08-13 2024-06-30 13F MARATHON PETE COM 56585A102 1,438 -6 -0.42 249 -14.14 0.1536
2024-05-14 2024-03-31 13F MARATHON PETE COM 56585A102 1,444 20 1.40 291 37.44 0.1751
2024-02-09 2023-12-31 13F MARATHON PETE COM 56585A102 1,424 -360 -20.18 211 -21.56 0.1287
2023-10-31 2023-09-30 13F MARATHON PETE COM 56585A102 1,784 38 2.18 270 32.51 0.1866
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 1,746 -23 -1.30 204 -14.71 0.1295
2023-05-15 2023-03-31 13F MARATHON PETE COM 56585A102 1,769 7 0.40 239 16.10 0.1558
2023-02-14 2022-12-31 13F MARATHON PETE COM 56585A102 1,762 1,762 205 0.1416
2022-02-14 2021-12-31 13F MARATHON PETE COM 56585A102 0 -3,875 -100.00 0 -100.00
2021-11-15 2021-09-30 13F MARATHON PETE COM 56585A102 3,875 2,576 198.31 240 207.69 0.0311
2021-08-16 2021-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,299 -2 -0.15 78 13.04 0.0125
2021-05-13 2021-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,301 49 3.91 69 35.29 0.0123
2021-02-12 2020-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,252 -372 -22.91 51 6.25 0.0097
2020-11-13 2020-09-30 13F Marathon Pete C Common Stock 56585A102 1,624 43 2.72 48 -18.64 0.0099
2020-08-04 2020-06-30 13F Marathon Pete C Common Stock 56585A102 1,581 -91 -5.44 59 47.50 0.0127
2020-05-15 2020-03-31 13F Marathon Pete C Common Stock 56585A102 1,672 -42 -2.45 40 -61.17 0.0101
2020-01-28 2019-12-31 13F Marathon Pete C Common Stock 56585A102 1,714 19 1.12 103 0.98 0.0224
2019-10-31 2019-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,695 -14 -0.82 102 7.37 0.0232
2019-07-30 2019-06-30 13F Marathon Pete C Common Stock 56585A102 1,709 45 2.70 95 -4.04 0.0206
2019-04-26 2019-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,664 99 6.33 99 7.61 0.0216
2019-01-25 2018-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,565 294 23.13 92 -9.80 0.0580
2018-10-26 2018-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,271 0 0.00 102 14.61 0.0535
2018-07-27 2018-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,271 0 0.00 89 -4.30 0.0451
2018-04-27 2018-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,271 60 4.95 93 16.25 0.0479
2018-01-26 2017-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,211 -70 -5.46 80 11.11 0.0389
2017-10-27 2017-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,281 0 0.00 72 7.46 0.0356
2017-07-28 2017-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,281 44 3.56 67 6.35 0.0334
2017-04-27 2017-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,237 0 0.00 63 1.61 0.0311
2017-01-26 2016-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,237 -19 -1.51 62 21.57 0.0312
2016-10-28 2016-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,256 68 5.72 51 13.33 0.0289
2016-07-29 2016-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,188 0 0.00 45 2.27 0.0265
2016-04-29 2016-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,188 -81 -6.38 44 -33.33 0.0265
2016-01-29 2015-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,269 25 2.01 66 13.79 0.0391
2015-10-29 2015-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,244 -420 -25.24 58 -33.33 0.0371
2015-07-27 2015-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,664 675 68.25 87 -13.86 0.0514
2015-04-29 2015-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 989 11 1.12 101 14.77 0.0593
2015-01-23 2014-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 978 -61 -5.87 88 0.00 0.0533
2014-10-24 2014-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,039 -54 -4.94 88 2.33 0.0557
2014-07-24 2014-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,093 0 0.00 86 -9.47 0.0513
2014-04-24 2014-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,093 11 1.02 95 -4.04 0.0583
2014-01-30 2013-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,082 39 3.74 99 47.76 0.0574
2013-10-25 2013-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,043 -79 -7.04 67 -16.25 0.0423
2013-07-25 2013-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,122 1,122 80 0.0549
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.