Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionJanney Montgomery Scott LLC
Latest Disclosed Ownership145,016 shares
Latest Disclosed Value $ 35,410
Janney Montgomery Scott LLC reports 3.82% increase in ownership of MPC / Marathon Petroleum Corporation

On April 22, 2026 - Janney Montgomery Scott LLC filed a 13F-HR form disclosing ownership of 145,016 shares of Marathon Petroleum Corporation (MX:MPC) valued at $35,410 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 139,679 shares of Marathon Petroleum Corporation. This represents a change in shares of 3.82% 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 PETROLEUM Common Stock 56585A102 145,016 5,337 3.82 35 59.09 0.0877
2026-02-11 2025-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 139,679 8,490 6.47 23 -12.00 0.0521
2025-10-27 2025-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 131,189 -3,155 -2.35 25 13.64 0.0599
2025-07-17 2025-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 134,344 -2,274 -1.66 22 15.79 0.0583
2025-04-17 2025-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 136,618 -9,231 -6.33 20 -5.00 0.0564
2025-01-17 2024-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 145,849 676 0.47 20 -13.04 0.0564
2024-10-29 2024-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 145,173 -22,279 -13.30 24 -20.69 0.0660
2024-07-25 2024-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 167,452 7,599 4.75 29 -9.37 0.0886
2024-05-01 2024-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 159,853 -4,408 -2.68 32 33.33 0.0958
2024-02-08 2023-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 164,261 24,959 17.92 24 14.29 0.0791
2023-11-08 2023-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 139,302 16,225 13.18 21 50.00 0.0786
2023-07-26 2023-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 123,077 -7,948 -6.07 14 -17.65 0.0501
2023-04-28 2023-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 131,025 18,221 16.15 18 30.77 0.0721
2023-02-01 2022-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 112,804 -3,470 -2.98 13 -99.89 0.0511
2022-10-25 2022-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 116,274 -4,347 -3.60 11,549 9.26 0.0495
2022-08-03 2022-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 120,621 -24,608 -16.94 10,570 -14.87 0.0477
2022-05-04 2022-03-31 13F LEGG LOW VOL HI DIV ETF Common Stock 56585A102 145,229 160 0.11 12,417 33.76 0.0531
2022-01-27 2021-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 145,069 43,950 43.46 9,283 48.53 0.0360
2021-10-29 2021-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 101,119 -3,179 -3.05 6,250 -0.83 0.0267
2021-07-26 2021-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 104,298 18,984 22.25 6,302 38.11 0.0278
2021-04-27 2021-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 85,314 3,188 3.88 4,563 34.32 0.0222
2021-01-25 2020-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 82,126 -13,610 -14.22 3,397 20.93 0.0164
2020-11-06 2020-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 95,736 10,652 12.52 2,809 -11.67 0.0160
2020-07-23 2020-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 85,084 -52,085 -37.97 3,180 -1.85 0.0201
2020-04-30 2020-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 137,169 -13,696 -9.08 3,240 -64.36 0.0256
2020-01-21 2019-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 150,865 -31,687 -17.36 9,090 -18.03 0.0597
2019-10-29 2019-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 182,552 16,584 9.99 11,090 19.58 0.0807
2019-07-29 2019-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 165,968 102,030 159.58 9,274 142.33 0.0712
2019-04-30 2019-03-31 13F/A-1 MARATHON PETROLEUM Common Stock 56585A102 63,938 3,414 5.64 3,827 7.14 0.0315
2019-04-30 2019-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 60,524 0 3,572
2019-02-01 2018-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 60,524 3,781 6.66 3,572 -21.29 0.0344
2018-11-05 2018-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 56,743 4,854 9.35 4,538 24.64 0.0391
2018-07-24 2018-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 51,889 692 1.35 3,641 -2.73 0.0350
2018-04-19 2018-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 51,197 18,176 55.04 3,743 71.78 0.0377
2018-02-14 2017-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 33,021 -3,289 -9.06 2,179 7.02 0.0226
2017-11-15 2017-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 36,310 -2,988 -7.60 2,036 -0.97 0.0232
2017-07-27 2017-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 39,298 -241 -0.61 2,056 2.90 0.0257
2017-04-26 2017-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 39,539 1,781 4.72 1,998 5.10 0.0266
2017-02-13 2016-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 37,758 2,333 6.59 1,901 32.20 0.0287
2016-11-14 2016-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 35,425 12,144 52.16 1,438 19.14 0.0253
2016-08-05 2016-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 23,281 -4 -0.02 1,207 39.38 0.0191
2016-05-10 2016-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 23,285 4 0.02 866 -28.25 0.0227
2016-02-19 2015-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 23,281 1,586 7.31 1,207 20.10 0.0312
2015-11-16 2015-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 21,695 -976 -4.31 1,005 -15.19 0.0284
2015-08-04 2015-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 22,671 11,524 103.38 1,186 3.86 0.0248
2015-05-12 2015-03-31 13F/A-1 MARATHON PETROLEUM Common Stock 56585A102 11,147 -413 -3.57 1,141 9.40 0.0213
2015-04-30 2015-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 11,147 1,141
2015-02-10 2014-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 11,560 -350 -2.94 1,043 3.47 0.0209
2014-11-14 2014-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 11,910 -1,205 -9.19 1,008 -1.47 0.0210
2014-08-13 2014-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 13,115 385 3.02 1,024 -7.67 0.0223
2014-05-14 2014-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 12,730 4,232 49.80 1,108 42.23 0.0268
2014-02-19 2013-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 8,498 372 4.58 780 -99.85 0.0206
2013-11-14 2013-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 8,126 4,591 129.87 522,634 108.08 0.0157
2013-08-13 2013-06-30 13F MARATHON PETROLEUM COMMON 56585A102 3,535 3,535 251,174 0.0263
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.