Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionHeck Capital Advisors, LLC
Latest Disclosed Ownership2,071 shares
Latest Disclosed Value $ 505,697
Heck Capital Advisors, LLC reports 0.38% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 16, 2026 - Heck Capital Advisors, LLC filed a 13F-HR form disclosing ownership of 2,071 shares of Marathon Petroleum Corporation (MX:MPC) valued at $505,697 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 2,079 shares of Marathon Petroleum Corporation. This represents a change in shares of -0.38% 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)
2026-04-16 2026-03-31 13F MARATHON PETE COM 56585A102 2,071 -8 -0.38 506 49.41 0.0375
2026-01-16 2025-12-31 13F MARATHON PETE COM 56585A102 2,079 -17 -0.81 338 -16.13 0.0252
2025-10-24 2025-09-30 13F MARATHON PETE COM 56585A102 2,096 -1,756 -45.59 404 -36.93 0.0312
2025-07-23 2025-06-30 13F MARATHON PETE COM 56585A102 3,852 290 8.14 640 23.36 0.0550
2025-05-13 2025-03-31 13F MARATHON PETE COM 56585A102 3,562 -1 -0.03 519 4.23 0.0584
2025-05-13 2024-12-31 13F/A-2 MARATHON PETE COM 56585A102 3,563 -9 -0.25 497 -14.46 0.0570
2025-01-23 2024-12-31 13F MARATHON PETE COM 56585A102 4,310 4,310 601 0.0409
2025-05-19 2024-09-30 13F MARATHON PETE COM 56585A102 3,572 -107 -2.91 582 -8.93 0.0671
2025-05-19 2024-06-30 13F MARATHON PETE COM 56585A102 3,679 -4 -0.11 638 -14.02 0.0794
2025-05-19 2024-03-31 13F MARATHON PETE COM 56585A102 3,683 40 1.10 742 37.41 0.1132
2025-05-19 2023-12-31 13F MARATHON PETE COM 56585A102 3,643 -357 -8.93 540 -10.74 0.0882
2025-05-19 2023-09-30 13F MARATHON PETE COM 56585A102 4,000 -51 -1.26 605 28.18 0.1122
2025-05-19 2023-06-30 13F MARATHON PETE COM 56585A102 4,051 -94 -2.27 472 -15.41 0.0814
2025-05-19 2023-03-31 13F MARATHON PETE COM 56585A102 4,145 162 4.07 559 20.52 0.1073
2025-05-19 2022-12-31 13F MARATHON PETE COM 56585A102 3,983 68 1.74 464 19.33 0.0898
2025-05-20 2022-09-30 13F/A-1 MARATHON PETE COM 56585A102 3,915 73 1.90 389 23.17 0.0801
2025-05-19 2022-09-30 13F MARATHON PETE COM 56585A102 3,683 -159 742 0.1132
2025-05-19 2022-06-30 13F MARATHON PETE COM 56585A102 3,842 3,842 316 0.0636
2025-05-19 2020-09-30 13F MARATHON PETE COM 56585A102 0 0 0 0.0000
2025-05-19 2020-06-30 13F MARATHON PETE COM 56585A102 0 -499 -100.00 0 -100.00
2025-05-19 2020-03-31 13F MARATHON PETE COM 56585A102 499 -5,928 -92.24 12 -97.16 0.0034
2025-05-19 2019-12-31 13F MARATHON PETECORP COM 56585A102 6,427 229 3.69 387 2.93 0.0930
2025-05-19 2019-09-30 13F MARATHON PETE COM 56585A102 6,198 231 3.87 377 12.91 0.1158
2025-05-19 2019-06-30 13F MARATHON PETE COM 56585A102 5,967 226 3.94 333 -2.92 0.0895
2025-05-19 2019-03-31 13F MARATHON PETE COM 56585A102 5,741 1,708 42.35 344 44.73 0.1028
2025-05-19 2018-12-31 13F MARATHON PETE COM 56585A102 4,033 -96 -2.33 238 -28.18 0.0876
2025-05-19 2018-09-30 13F MARATHON PETE COM 56585A102 4,129 1,333 47.68 330 68.37 0.1090
2025-05-19 2018-06-30 13F MARATHON PETE COM 56585A102 2,796 17 0.61 196 -3.45 0.0714
2025-05-19 2018-03-31 13F MARATHON PETE COM 56585A102 2,779 -9 -0.32 203 10.93 0.0898
2025-05-19 2017-12-31 13F MARATHON PETE COM 56585A102 2,788 13 0.47 184 18.06 0.0894
2025-05-19 2017-09-30 13F MARATHON PETE COM 56585A102 2,775 92 3.43 156 10.71 0.0831
2025-05-19 2017-06-30 13F MARATHON PETE COM 56585A102 2,683 2,683 140 0.0815
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.