Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionTower Research Capital LLC (TRC)
Latest Disclosed Ownership16,138 shares
Latest Disclosed Value $ 3,940,577
Tower Research Capital LLC (TRC) reports 112.06% increase in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Tower Research Capital LLC (TRC) filed a 13F-HR form disclosing ownership of 16,138 shares of Marathon Petroleum Corporation (MX:MPC) valued at $3,940,577 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,610 shares of Marathon Petroleum Corporation. This represents a change in shares of 112.06% 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)
2026-05-15 2026-03-31 13F MARATHON PETE COM 56585A102 16,138 8,528 112.06 3,941 218.51 0.0676
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 7,610 -1,851 -19.56 1,238 -32.14 0.0299
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 9,461 3,264 52.67 1,824 77.16 0.0503
2025-08-15 2025-06-30 13F MARATHON PETE COM 56585A102 6,197 -15,606 -71.58 1,029 -67.50 0.0278
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 21,803 8,834 68.12 3,167 75.01 0.0943
2025-02-13 2024-12-31 13F MARATHON PETE COM 56585A102 12,969 5,214 67.23 1,809 43.23 0.0359
2024-11-14 2024-09-30 13F MARATHON PETE COM 56585A102 7,755 -38,844 -83.36 1,263 -84.37 0.0334
2024-08-13 2024-06-30 13F MARATHON PETE COM 56585A102 46,599 35,752 329.60 8,084 269.93 0.1364
2024-05-15 2024-03-31 13F MARATHON PETE COM 56585A102 10,847 -31,937 -74.65 2,186 -65.57 0.0526
2024-02-13 2023-12-31 13F MARATHON PETE COM 56585A102 42,784 20,726 93.96 6,347 90.14 0.0784
2023-11-14 2023-09-30 13F MARATHON PETE COM 56585A102 22,058 -11,964 -35.17 3,338 -15.83 0.1044
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 34,022 26,063 327.47 3,967 396,500.00 0.1322
2023-05-09 2023-03-31 13F MARATHON PETE COM 56585A102 7,959 -7,960 -50.00 1 0.00 0.0341
2023-02-10 2022-12-31 13F MARATHON PETE COM 56585A102 15,919 -29,654 -65.07 2 -99.98 0.0768
2022-11-10 2022-09-30 13F MARATHON PETE COM 56585A102 45,573 16,113 54.69 4,527 86.99 0.0735
2022-08-15 2022-06-30 13F MARATHON PETE COM 56585A102 29,460 -44,733 -60.29 2,421 -61.84 0.0543
2022-05-12 2022-03-31 13F MARATHON PETE COM 56585A102 74,193 46,447 167.40 6,344 257.41 0.0607
2022-02-14 2021-12-31 13F MARATHON PETE COM 56585A102 27,746 16,061 137.45 1,775 145.50 0.0307
2021-11-15 2021-09-30 13F MARATHON PETE COM 56585A102 11,685 -21,513 -64.80 723 -63.96 0.0185
2021-08-16 2021-06-30 13F MARATHON PETE COM 56585A102 33,198 -87,371 -72.47 2,006 -68.90 0.0522
2021-05-17 2021-03-31 13F MARATHON PETE COM 56585A102 120,569 63,743 112.17 6,450 174.47 0.1086
2021-02-16 2020-12-31 13F MARATHON PETE COM 56585A102 56,826 39,651 230.86 2,350 366.27 0.0718
2020-11-16 2020-09-30 13F MARATHON PETE COM 56585A102 17,175 -2,369 -12.12 504 -31.05 0.0056
2020-08-13 2020-06-30 13F MARATHON PETE COM 56585A102 19,544 7,263 59.14 731 151.20 0.0300
2020-05-15 2020-03-31 13F MARATHON PETE COM 56585A102 12,281 11,289 1,138.00 291 385.00 0.0177
2020-02-07 2019-12-31 13F MARATHON PETE COM 56585A102 992 -21,627 -95.61 60 -95.63 0.0050
2019-11-05 2019-09-30 13F MARATHON PETE COM 56585A102 22,619 22,619 1,374 0.0942
2019-08-13 2019-06-30 13F MARATHON PETE COM 56585A102 0 -33,645 -100.00 0 -100.00
2019-05-14 2019-03-31 13F MARATHON PETE COM 56585A102 33,645 5,706 20.42 2,014 22.13 0.1222
2019-02-14 2018-12-31 13F MARATHON PETE COM 56585A102 27,939 -49,549 -63.94 1,649 -73.39 0.1189
2018-11-13 2018-09-30 13F MARATHON PETE COM 56585A102 77,488 52,900 215.15 6,196 259.19 0.4543
2018-08-14 2018-06-30 13F MARATHON PETE COM 56585A102 24,588 21,736 762.13 1,725 729.33 0.0966
2018-05-15 2018-03-31 13F MARATHON PETE COM 56585A102 2,852 -3,256 -53.31 208 -48.39 0.0178
2018-02-09 2017-12-31 13F MARATHON PETE COM 56585A102 6,108 2,329 61.63 403 90.09 0.0520
2017-11-14 2017-09-30 13F MARATHON PETE COM 56585A102 3,779 173 4.80 212 12.17 0.0175
2017-08-14 2017-06-30 13F MARATHON PETE COM 56585A102 3,606 -8,053 -69.07 189 -67.97 0.0215
2017-05-19 2017-03-31 13F MARATHON PETE COM 56585A102 11,659 -10,516 -47.42 590 -47.18 0.0589
2017-02-03 2016-12-31 13F MARATHON PETE COM 56585A102 22,175 14,417 185.83 1,117 254.60 0.1213
2016-11-08 2016-09-30 13F MARATHON PETE COM 56585A102 7,758 7,758 0.00 315 0.0313
2016-08-10 2016-06-30 13F MARATHON PETE COM 56585A102 0 -808 -100.00 0 -100.00
2016-05-16 2016-03-31 13F MARATHON PETE COM 56585A102 808 239 42.00 30 3.45 0.0045
2016-02-10 2015-12-31 13F MARATHON PETE COM 56585A102 569 -1,572 -73.42 29 -70.71 0.0047
2015-11-13 2015-09-30 13F MARATHON PETE COM 56585A102 2,141 2,141 0.00 99 0.0096
2015-07-30 2015-06-30 13F MARATHON PETE COM 56585A102 0 -94 -100.00 0 -100.00
2015-05-12 2015-03-31 13F MARATHON PETE COM 56585A102 94 94 0.00 10 0.0012
2015-02-05 2014-12-31 13F MARATHON PETE COM 56585A102 0 -5,600 -100.00 0 -100.00
2014-10-31 2014-09-30 13F MARATHON PETE COM 56585A102 5,600 -7,659 -57.76 474 -54.20 0.0531
2014-08-14 2014-06-30 13F MARATHON PETE COM 56585A102 13,259 12,741 2,459.65 1,035 2,200.00 0.1330
2014-05-02 2014-03-31 13F MARATHON PETE COM 56585A102 518 518 -89.14 45 -85.34 0.0058
2014-01-31 2013-12-31 13F MARATHON PETE COM 56585A102 0 -4,769 -100.00 0 -100.00
2013-11-06 2013-09-30 13F MARATHON PETE COM 56585A102 4,769 4,274 863.43 307 777.14 0.0331
2013-08-05 2013-06-30 13F MARATHON PETE COM 56585A102 495 495 35 0.0028
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.