Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionTexas Yale Capital Corp.
Latest Disclosed Ownership11,775 shares
Latest Disclosed Value $ 2,875,220
Texas Yale Capital Corp. ownership in MPC / Marathon Petroleum Corporation

On May 4, 2026 - Texas Yale Capital Corp. filed a 13F-HR form disclosing ownership of 11,775 shares of Marathon Petroleum Corporation (MX:MPC) valued at $2,875,220 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 11,775 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)
2026-05-04 2026-03-31 13F MARATHON PETE COM 56585A102 11,775 0 0.00 2,875 50.21 0.0816
2026-02-10 2025-12-31 13F MARATHON PETE COM 56585A102 11,775 0 0.00 1,915 -15.65 0.0581
2025-11-07 2025-09-30 13F MARATHON PETE COM 56585A102 11,775 0 0.00 2,270 16.06 0.0714
2025-08-06 2025-06-30 13F MARATHON PETE COM 56585A102 11,775 -30 -0.25 1,956 13.73 0.0641
2025-05-07 2025-03-31 13F MARATHON PETE COM 56585A102 11,805 7,420 169.21 1,720 181.34 0.0706
2025-02-13 2024-12-31 13F MARATHON PETE COM 56585A102 4,385 230 5.54 612 -9.62 0.0246
2024-11-12 2024-09-30 13F MARATHON PETE COM 56585A102 4,155 100 2.47 677 -3.84 0.0294
2024-08-13 2024-06-30 13F MARATHON PETE COM 56585A102 4,055 0 0.00 703 -13.95 0.0335
2024-05-08 2024-03-31 13F MARATHON PETE COM 56585A102 4,055 0 0.00 817 35.94 0.0363
2024-02-13 2023-12-31 13F MARATHON PETE COM 56585A102 4,055 0 0.00 602 -1.96 0.0287
2023-11-09 2023-09-30 13F MARATHON PETE COM 56585A102 4,055 0 0.00 614 29.87 0.0277
2023-08-03 2023-06-30 13F MARATHON PETE COM 56585A102 4,055 0 0.00 473 -13.55 0.0222
2023-05-10 2023-03-31 13F MARATHON PETE COM 56585A102 4,055 80 2.01 547 18.18 0.0278
2023-02-13 2022-12-31 13F MARATHON PETE COM 56585A102 3,975 50 1.27 463 18.46 0.0264
2022-11-08 2022-09-30 13F MARATHON PETE COM 56585A102 3,925 100 2.61 390 24.20 0.0250
2022-08-11 2022-06-30 13F MARATHON PETE COM 56585A102 3,825 0 0.00 314 -3.98 0.0203
2022-05-10 2022-03-31 13F MARATHON PETE COM 56585A102 3,825 0 0.00 327 33.47 0.0178
2022-02-10 2021-12-31 13F MARATHON PETE COM 56585A102 3,825 -406 -9.60 245 -6.49 0.0125
2021-11-08 2021-09-30 13F MARATHON PETE COM 56585A102 4,231 0 0.00 262 2.34 0.0149
2021-08-05 2021-06-30 13F MARATHON PETE COM 56585A102 4,231 0 0.00 256 13.27 0.0146
2021-05-12 2021-03-31 13F MARATHON PETE COM 56585A102 4,231 4,231 226 0.0142
2020-05-13 2020-03-31 13F MARATHON PETE COM 56585A102 0 -46,074 -100.00 0 -100.00
2020-02-11 2019-12-31 13F MARATHON PETE COM 56585A102 46,074 0 0.00 2,776 -0.82 0.1903
2019-10-31 2019-09-30 13F MARATHON PETE COM 56585A102 46,074 -289 -0.62 2,799 8.03 0.2008
2019-07-24 2019-06-30 13F MARATHON PETE COM 56585A102 46,363 -46,769 -50.22 2,591 -53.52 0.1933
2019-05-10 2019-03-31 13F MARATHON PETE COM 56585A102 93,132 46,566 100.00 5,574 102.84 0.2229
2019-02-11 2018-12-31 13F MARATHON PETE COM 56585A102 46,566 24,666 112.63 2,748 56.94 0.2481
2018-11-13 2018-09-30 13F MARATHON PETE COM 56585A102 21,900 0 0.00 1,751 13.92 0.1414
2018-08-07 2018-06-30 13F MARATHON PETE COM 56585A102 21,900 0 0.00 1,537 -4.00 0.1320
2018-05-03 2018-03-31 13F MARATHON PETE COM 56585A102 21,900 0 0.00 1,601 10.80 0.1378
2018-02-07 2017-12-31 13F MARATHON PETE COM 56585A102 21,900 0 0.00 1,445 17.67 0.1244
2017-11-08 2017-09-30 13F MARATHON PETE COM 56585A102 21,900 0 0.00 1,228 7.16 0.1060
2017-08-03 2017-06-30 13F MARATHON PETE COM 56585A102 21,900 0 0.00 1,146 3.52 0.1007
2017-05-03 2017-03-31 13F MARATHON PETE COM 56585A102 21,900 0 0.00 1,107 0.36 0.0976
2017-02-13 2016-12-31 13F MARATHON PETE COM 56585A102 21,900 -14,100 -39.17 1,103 -24.50 0.1042
2016-11-14 2016-09-30 13F MARATHON PETE COM 56585A102 36,000 0 0.00 1,461 6.88 0.1405
2016-08-12 2016-06-30 13F MARATHON PETE COM 56585A102 36,000 0 0.00 1,367 2.17 0.1359
2016-05-13 2016-03-31 13F MARATHON PETE COM 56585A102 36,000 0 0.00 1,338 -28.30 0.1377
2016-05-10 2015-12-31 13F/A-1 MARATHON PETE COM 56585A102 36,000 0 0.00 1,866 11.87 0.1678
2016-02-05 2015-12-31 13F MARATHON PETE COM 56585A102 36,000 1,866
2016-05-10 2015-09-30 13F/A-1 MARATHON PETE COM 56585A102 36,000 0 0.00 1,668 -11.42 0.1525
2015-11-10 2015-09-30 13F MARATHON PETE COM 56585A102 36,000 1,668
2016-05-10 2015-06-30 13F/A-1 MARATHON PETE COM 56585A102 36,000 22,000 157.14 1,883 31.40 0.1559
2015-07-30 2015-06-30 13F MARATHON PETE COM 56585A102 36,000 1,883
2016-05-10 2015-03-31 13F/A-1 MARATHON PETE COM 56585A102 14,000 0 0.00 1,433 13.37 0.1141
2015-04-16 2015-03-31 13F MARATHON PETE COM 56585A102 14,000 1,433
2015-02-12 2014-12-31 13F MARATHON PETE COM 56585A102 14,000 14,000 1,264 0.1094
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.