Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionLarson Financial Group LLC
Latest Disclosed Ownership4,028 shares
Latest Disclosed Value $ 983,652
Larson Financial Group LLC reports 7.18% increase in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Larson Financial Group LLC filed a 13F-HR form disclosing ownership of 4,028 shares of Marathon Petroleum Corporation (MX:MPC) valued at $983,652 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 3,758 shares of Marathon Petroleum Corporation. This represents a change in shares of 7.18% 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 4,028 270 7.18 984 60.88 0.0295
2026-02-06 2025-12-31 13F MARATHON PETE COM 56585A102 3,758 -3,872 -50.75 611 -58.44 0.0203
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 7,630 333 4.56 1,471 21.29 0.0514
2025-08-08 2025-06-30 13F MARATHON PETE COM 56585A102 7,297 4,563 166.90 1,212 204.52 0.0485
2025-05-02 2025-03-31 13F MARATHON PETE COM 56585A102 2,734 47 1.75 398 6.42 0.0189
2025-02-07 2024-12-31 13F MARATHON PETE COM 56585A102 2,687 35 1.32 375 -13.43 0.0194
2024-11-12 2024-09-30 13F MARATHON PETE COM 56585A102 2,652 324 13.92 432 7.20 0.0245
2024-08-02 2024-06-30 13F MARATHON PETE COM 56585A102 2,328 -1,561 -40.14 404 -48.53 0.0275
2024-05-03 2024-03-31 13F MARATHON PETE COM 56585A102 3,889 1,761 82.75 784 148.57 0.0605
2024-02-01 2023-12-31 13F MARATHON PETE COM 56585A102 2,128 29 1.38 316 -0.63 0.0276
2023-11-03 2023-09-30 13F MARATHON PETE COM 56585A102 2,099 302 16.81 318 51.67 0.0312
2023-08-03 2023-06-30 13F MARATHON PETE COM 56585A102 1,797 153 9.31 210 -5.43 0.0209
2023-05-04 2023-03-31 13F MARATHON PETE COM 56585A102 1,644 -849 -34.06 222 -23.79 0.0241
2023-02-03 2022-12-31 13F MARATHON PETE COM 56585A102 2,493 1 0.04 290 16.94 0.0347
2022-11-03 2022-09-30 13F MARATHON PETE COM 56585A102 2,492 1,024 69.75 248 104.96 0.0353
2022-08-04 2022-06-30 13F MARATHON PETE COM 56585A102 1,468 0 0.00 121 -3.20 0.0209
2022-05-05 2022-03-31 13F MARATHON PETE COM 56585A102 1,468 -151 -9.33 125 20.19 0.0200
2022-02-03 2021-12-31 13F MARATHON PETE COM 56585A102 1,619 -2,176 -57.34 104 -55.74 0.0165
2021-11-04 2021-09-30 13F MARATHON PETE COM 56585A102 3,795 2,400 172.04 235 179.76 0.0466
2021-08-10 2021-06-30 13F MARATHON PETE COM 56585A102 1,395 0 0.00 84 12.00 0.0195
2021-05-06 2021-03-31 13F/A-1 MARATHON PETE COM 56585A102 1,395 -1 -0.07 75 29.31 0.0221
2021-04-08 2021-03-31 13F MARATHON PETE COM 56585A102 1,396 0 58 0.0197
2021-01-14 2020-12-31 13F MARATHON PETE COM 56585A102 1,396 5 0.36 58 41.46 0.0197
2020-10-08 2020-09-30 13F MARATHON PETE COM 56585A102 1,391 357 34.53 41 5.13 0.0168
2020-07-10 2020-06-30 13F MARATHON PETE COM 56585A102 1,034 0 0.00 39 62.50 0.0185
2020-04-09 2020-03-31 13F MARATHON PETE COM 56585A102 1,034 0 0.00 24 -61.29 0.0150
2020-01-10 2019-12-31 13F MARATHON PETE COM 56585A102 1,034 0 0.00 62 -1.59 0.0357
2019-10-11 2019-09-30 13F MARATHON PETE COM 56585A102 1,034 0 0.00 63 8.62 0.0412
2019-07-16 2019-06-30 13F MARATHON PETE COM 56585A102 1,034 0 0.00 58 -6.45 0.0431
2019-04-05 2019-03-31 13F/A-1 MARATHON PETE COM 56585A102 1,034 0 0.00 62 1.64 0.0491
2019-04-04 2019-03-31 13F MARATHON PETE COM 56585A102 1,034 0 61 0.0564
2019-02-07 2018-12-31 13F MARATHON PETE COM 56585A102 1,034 1,034 61 0.0564
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.