Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionPeoples Financial Services Corp.
Latest Disclosed Ownership1,832 shares
Latest Disclosed Value $ 447,337
Peoples Financial Services Corp. ownership in MPC / Marathon Petroleum Corporation

On April 20, 2026 - Peoples Financial Services Corp. filed a 13F-HR form disclosing ownership of 1,832 shares of Marathon Petroleum Corporation (MX:MPC) valued at $447,337 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 1,832 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)
2026-04-20 2026-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,832 0 0.00 447 50.51 0.1277
2026-01-26 2025-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,832 0 0.00 298 -15.86 0.1390
2025-10-28 2025-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,832 -118 -6.05 353 9.29 0.1595
2025-07-17 2025-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,950 0 0.00 324 13.73 0.1601
2025-04-30 2025-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,950 0 0.00 284 4.41 0.1365
2025-01-14 2024-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,950 0 0.00 272 -14.20 0.1260
2024-10-16 2024-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,950 -50 -2.50 318 -8.38 0.1439
2024-07-25 2024-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 347 -14.14 0.1569
2024-04-17 2024-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 403 36.15 0.1749
2024-01-24 2023-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 297 -1.99 0.1286
2023-10-13 2023-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 303 29.61 0.1426
2023-07-11 2023-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 233 -13.38 0.1046
2023-04-13 2023-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 270 15.95 0.1260
2023-01-12 2022-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 233 16.58 0.1089
2022-10-07 2022-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 199 21.34 0.1027
2022-07-07 2022-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 -224 -10.07 164 -13.68 0.0777
2022-04-15 2022-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,224 224 11.20 190 48.44 0.0822
2022-01-19 2021-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 128 3.23 0.0498
2021-10-15 2021-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 124 2.48 0.0523
2021-07-14 2021-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 121 13.08 0.0507
2021-04-15 2021-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 107 28.92 0.0465
2021-01-12 2020-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 0 0.00 83 40.68 0.0382
2020-10-07 2020-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,000 -768 -27.75 59 -42.72 0.0297
2020-07-10 2020-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 103 58.46 0.0543
2020-04-09 2020-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 65 -61.08 0.0382
2020-01-17 2019-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 167 -0.60 0.0788
2019-10-16 2019-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 168 8.39 0.0840
2019-07-11 2019-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 155 -6.63 0.0786
2019-04-18 2019-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 166 1.84 0.0849
2019-01-14 2018-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 163 -26.24 0.0927
2018-10-12 2018-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 221 13.92 0.1117
2018-07-10 2018-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 194 -3.96 0.1086
2018-04-25 2018-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 202 10.38 0.1155
2018-01-17 2017-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 183 18.06 0.1001
2017-10-18 2017-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 155 6.90 0.0879
2017-07-17 2017-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 145 3.57 0.0849
2017-04-17 2017-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 140 33.33 0.0835
2017-01-12 2016-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 105 -6.25 0.0648
2016-10-20 2016-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 112 6.67 0.0697
2016-07-20 2016-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 105 1.94 0.0648
2016-04-14 2016-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 0 0.00 103 -27.97 0.0649
2016-01-27 2015-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 2,768 1,546 126.51 143 150.88 0.0943
2015-10-19 2015-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,222 0 0.00 57 -10.94 0.0406
2015-07-09 2015-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 1,222 594 94.59 64 0.00 0.0428
2015-04-09 2015-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 628 0 0.00 64 12.28 0.0423
2015-01-15 2014-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 628 0 0.00 57 7.55 0.0372
2014-10-29 2014-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 628 0 0.00 53 8.16 0.0358
2014-07-15 2014-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 628 0 0.00 49 -10.91 0.0311
2014-04-07 2014-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 628 0 0.00 55 -5.17 0.0408
2014-01-08 2013-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 628 628 58 0.0382
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.