Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionGw Henssler & Associates Ltd
Latest Disclosed Ownership8,094 shares
Latest Disclosed Value $ 1,976,393
Gw Henssler & Associates Ltd reports 29.20% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Gw Henssler & Associates Ltd filed a 13F-HR form disclosing ownership of 8,094 shares of Marathon Petroleum Corporation (MX:MPC) valued at $1,976,393 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 11,433 shares of Marathon Petroleum Corporation. This represents a change in shares of -29.20% 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 8,094 -3,339 -29.20 1,976 6.29 0.0931
2026-02-10 2025-12-31 13F MARATHON PETE COM 56585A102 11,433 -1,167 -9.26 1,859 -23.43 0.0895
2026-01-23 2025-09-30 13F MARATHON PETE COM 56585A102 12,600 -369 -2.85 2,429 12.72 0.1213
2025-07-25 2025-06-30 13F MARATHON PETE COM 56585A102 12,969 -68 -0.52 2,154 13.43 0.1151
2025-05-15 2025-03-31 13F/A-1 MARATHON PETE COM 56585A102 13,037 -265,321 -95.32 1,899 -95.81 0.1089
2025-05-14 2025-03-31 13F MARATHON PETE COM 56585A102 275,804 -2,554 44,931 2.5966
2025-01-24 2024-12-31 13F MARATHON PETE COM 56585A102 278,358 -5,956 -2.09 45,347 -2.09 2.5992
2024-10-25 2024-09-30 13F MARATHON PETE COM 56585A102 284,314 -10,317 -3.50 46,318 -9.38 2.6199
2024-08-01 2024-06-30 13F MARATHON PETE COM 56585A102 294,631 -18,093 -5.79 51,113 -18.89 3.0764
2024-05-07 2024-03-31 13F MARATHON PETE COM 56585A102 312,724 -15,696 -4.78 63,014 29.33 3.7013
2024-01-26 2023-12-31 13F MARATHON PETE COM 56585A102 328,420 -19,716 -5.66 48,724 -7.52 3.2167
2023-10-24 2023-09-30 13F MARATHON PETE COM 56585A102 348,136 -9,538 -2.67 52,687 26.33 3.5968
2023-08-02 2023-06-30 13F MARATHON PETE COM 56585A102 357,674 -6,522 -1.79 41,705 -15.07 2.7388
2023-04-26 2023-03-31 13F MARATHON PETE COM 56585A102 364,196 -21,469 -5.57 49,105 9.39 3.2620
2023-02-03 2022-12-31 13F MARATHON PETE COM 56585A102 385,665 -8,795 -2.23 44,888 14.56 3.1519
2022-11-04 2022-09-30 13F MARATHON PETE COM 56585A102 394,460 -7,526 -1.87 39,182 18.56 2.9326
2022-08-04 2022-06-30 13F MARATHON PETE COM 56585A102 401,986 -7,234 -1.77 33,047 -5.55 2.4535
2022-05-09 2022-03-31 13F MARATHON PETE COM 56585A102 409,220 -907 -0.22 34,989 33.32 2.1252
2022-01-28 2021-12-31 13F MARATHON PETE COM 56585A102 410,127 -3,810 -0.92 26,244 2.58 1.6741
2021-11-02 2021-09-30 13F MARATHON PETE COM 56585A102 413,937 -46,765 -10.15 25,585 -8.09 1.7747
2021-08-09 2021-06-30 13F MARATHON PETE COM 56585A102 460,702 -8,817 -1.88 27,836 10.83 1.8308
2021-04-28 2021-03-31 13F MARATHON PETE COM 56585A102 469,519 -347 -0.07 25,115 29.23 1.7959
2021-02-02 2020-12-31 13F MARATHON PETE COM 56585A102 469,866 -24,567 -4.97 19,434 33.96 1.4846
2020-10-22 2020-09-30 13F MARATHON PETE COM 56585A102 494,433 397 0.08 14,507 -21.44 1.2302
2020-07-21 2020-06-30 13F MARATHON PETE COM 56585A102 494,036 52,970 12.01 18,467 77.26 1.6233
2020-04-27 2020-03-31 13F MARATHON PETE COM 56585A102 441,066 267,401 153.98 10,418 -0.43 1.0556
2020-02-24 2019-12-31 13F MARATHON PETE COM 56585A102 173,665 14,129 8.86 10,463 7.96 0.8652
2019-11-18 2019-09-30 13F MARATHON PETE COM 56585A102 159,536 159,536 9,692 0.8629
2019-01-22 2018-12-31 13F MARATHON PETE COM 56585A102 0 -3,534 -100.00 0 -100.00
2018-10-23 2018-09-30 13F MARATHON PETE COM 56585A102 3,534 3,534 283 0.0258
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.