Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionManchester Capital Management LLC
Latest Disclosed Ownership517 shares
Latest Disclosed Value $ 126,242
Manchester Capital Management LLC reports 9.14% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 11, 2026 - Manchester Capital Management LLC filed a 13F-HR form disclosing ownership of 517 shares of Marathon Petroleum Corporation (MX:MPC) valued at $126,242 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 569 shares of Marathon Petroleum Corporation. This represents a change in shares of -9.14% 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)
2026-05-11 2026-03-31 13F MARATHON PETE COM 56585A102 517 -52 -9.14 126 36.96 0.0182
2026-02-11 2025-12-31 13F MARATHON PETE COM 56585A102 569 311 120.54 93 87.76 0.0126
2026-02-11 2025-12-31 13F MARATHON PETE COM 56585A102 569 93
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 258 -100 -27.93 50 -16.95 0.0067
2025-08-12 2025-06-30 13F MARATHON PETE COM 56585A102 358 35 10.84 59 25.53 0.0078
2025-05-09 2025-03-31 13F MARATHON PETE COM 56585A102 323 18 5.90 47 11.90 0.0058
2025-01-30 2024-12-31 13F MARATHON PETE COM 56585A102 305 -16 -4.98 43 -19.23 0.0049
2024-11-05 2024-09-30 13F MARATHON PETE COM 56585A102 321 -619 -65.85 52 -68.10 0.0061
2024-08-08 2024-06-30 13F MARATHON PETE COM 56585A102 940 741 372.36 163 307.50 0.0196
2024-05-06 2024-03-31 13F MARATHON PETE COM 56585A102 199 -16 -7.44 40 29.03 0.0049
2024-02-08 2023-12-31 13F MARATHON PETE COM 56585A102 215 106 97.25 32 93.75 0.0043
2023-11-09 2023-09-30 13F MARATHON PETE COM 56585A102 109 35 47.30 16 100.00 0.0024
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 74 0 0.00 9 -11.11 0.0012
2023-05-09 2023-03-31 13F MARATHON PETE COM 56585A102 74 -152 -67.26 10 -65.38 0.0013
2023-02-09 2022-12-31 13F MARATHON PETE COM 56585A102 226 0 0.00 26 18.18 0.0039
2022-11-08 2022-09-30 13F MARATHON PETE COM 56585A102 226 0 0.00 22 15.79 0.0038
2022-08-10 2022-06-30 13F MARATHON PETE COM 56585A102 226 0 0.00 19 0.00 0.0033
2022-05-09 2022-03-31 13F MARATHON PETE COM 56585A102 226 0 0.00 19 35.71 0.0027
2022-02-10 2021-12-31 13F MARATHON PETE COM 56585A102 226 0 0.00 14 0.00 0.0018
2021-11-12 2021-09-30 13F MARATHON PETE COM 56585A102 226 -700 -75.59 14 -75.00 0.0019
2021-08-16 2021-06-30 13F MARATHON PETE COM 56585A102 926 0 0.00 56 12.00 0.0077
2021-05-13 2021-03-31 13F MARATHON PETE COM 56585A102 926 -13 -1.38 50 28.21 0.0074
2021-02-16 2020-12-31 13F MARATHON PETE COM 56585A102 939 239 34.14 39 85.71 0.0060
2020-10-27 2020-09-30 13F MARATHON PETE COM 56585A102 700 -702 -50.07 21 -59.62 0.0033
2020-09-28 2020-06-30 13F MARATHON PETE COM 56585A102 1,402 0 0.00 52 57.58 0.0071
2020-05-14 2020-03-31 13F MARATHON PETE COM 56585A102 1,402 -967 -40.82 33 -76.92 0.0053
2020-02-10 2019-12-31 13F MARATHON PETE COM 56585A102 2,369 700 41.94 143 41.58 0.0156
2019-11-04 2019-09-30 13F MARATHON PETE COM 56585A102 1,669 0 0.00 101 8.60 0.0119
2019-08-05 2019-06-30 13F MARATHON PETE COM 56585A102 1,669 0 0.00 93 -7.00 0.0119
2019-05-08 2019-03-31 13F MARATHON PETE COM 56585A102 1,669 702 72.60 100 47.06 0.0128
2019-02-05 2018-12-31 13F/A-1 MARATHON PETE COM 56585A102 967 0 0.00 68 -11.69 0.0104
2019-02-04 2018-12-31 13F MARATHON PETE COM 56585A102 967 0 68
2018-11-01 2018-09-30 13F MARATHON PETE COM 56585A102 967 0 0.00 77 13.24 0.0110
2018-08-08 2018-06-30 13F MARATHON PETE COM 56585A102 967 -39 -3.88 68 -8.11 0.0103
2018-05-07 2018-03-31 13F MARATHON PETE COM 56585A102 1,006 39 4.03 74 15.63 0.0118
2018-02-08 2017-12-31 13F MARATHON PETE COM 56585A102 967 40 4.31 64 23.08 0.0095
2017-11-09 2017-09-30 13F MARATHON PETE COM 56585A102 927 0 0.00 52 6.12 0.0081
2017-08-09 2017-06-30 13F MARATHON PETE COM 56585A102 927 927 49 0.0078
2015-05-07 2015-03-31 13F MARATHON PETE Equities 56585A102 0 -1,332 -100.00 0 -100.00
2015-02-13 2014-12-31 13F MARATHON PETE Equities 56585A102 1,332 0 0.00 120 6.19 0.0149
2014-11-03 2014-09-30 13F Marathon Pete Equities 56585A102 1,332 0 0.00 113 8.65 0.0151
2014-07-31 2014-06-30 13F Marathon Pete Equities 56585A102 1,332 1,077 422.35 104 372.73 0.0138
2014-05-02 2014-03-31 13F Marathon Pete Equities 56585A102 255 -593 -69.93 22 -71.79 0.0035
2014-02-10 2013-12-31 13F Marathon Pete Equities 56585A102 848 0 0.00 78 41.82 0.0121
2013-11-12 2013-09-30 13F Marathon Pete Equities 56585A102 848 -152 -15.20 55 -22.54 0.0094
2013-08-14 2013-06-30 13F Marathon Pete Equities 56585A102 1,000 1,000 71 0.0132
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.