Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionSfmg, Llc
Latest Disclosed Ownership1,836 shares
Latest Disclosed Value $ 448,265
Sfmg, Llc reports 2.24% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 12, 2026 - Sfmg, Llc filed a 13F-HR form disclosing ownership of 1,836 shares of Marathon Petroleum Corporation (US:MPC) valued at $448,314 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,878 shares of Marathon Petroleum Corporation. This represents a change in shares of -2.24% during the quarter. The current value of the position is $490,598 USD.

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)
2026-05-12 2026-03-31 13F MARATHON PETE COM 56585A102 1,836 -42 -2.24 448 46.89 0.0304
2026-02-10 2025-12-31 13F MARATHON PETE COM 56585A102 1,878 -47 -2.44 305 -17.57 0.0205
2025-11-13 2025-09-30 13F MARATHON PETE COM 56585A102 1,925 -2 -0.10 371 15.63 0.0257
2025-08-12 2025-06-30 13F MARATHON PETE COM 56585A102 1,927 9 0.47 320 14.70 0.0240
2025-05-09 2025-03-31 13F MARATHON PETE COM 56585A102 1,918 130 7.27 279 12.05 0.0221
2025-02-11 2024-12-31 13F MARATHON PETE COM 56585A102 1,788 -1,165 -39.45 249 -48.23 0.0197
2024-11-25 2024-09-30 13F MARATHON PETE COM 56585A102 2,953 -268 -8.32 481 -13.80 0.0390
2024-08-14 2024-06-30 13F MARATHON PETE COM 56585A102 3,221 -218 -6.34 559 -19.36 0.0486
2024-05-07 2024-03-31 13F MARATHON PETE COM 56585A102 3,439 -134 -3.75 693 30.57 0.0596
2024-01-30 2023-12-31 13F MARATHON PETE COM 56585A102 3,573 148 4.32 530 2.32 0.0491
2023-11-06 2023-09-30 13F MARATHON PETE COM 56585A102 3,425 425 14.17 518 48.42 0.0533
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 3,000 -232 -7.18 350 -19.77 0.0360
2023-05-01 2023-03-31 13F MARATHON PETE COM 56585A102 3,232 -142 -4.21 436 10.97 0.0469
2023-01-25 2022-12-31 13F MARATHON PETE COM 56585A102 3,374 169 5.27 393 16.67 0.0436
2022-10-20 2022-09-30 13F MARATHON PETE COM 56585A102 3,205 -55 -1.69 336 25.37 0.0392
2022-08-08 2022-06-30 13F MARATHON PETE COM 56585A102 3,260 712 27.94 268 22.94 0.0311
2022-04-21 2022-03-31 13F MARATHON PETE COM 56585A102 2,548 -1,202 -32.05 218 -9.17 0.0216
2022-01-31 2021-12-31 13F MARATHON PETE COM 56585A102 3,750 375 11.11 240 14.83 0.0233
2021-11-01 2021-09-30 13F MARATHON PETE COM 56585A102 3,375 3,375 209 0.0232
2020-05-08 2020-03-31 13F MARATHON PETE COM 56585A102 0 -3,440 -100.00 0 -100.00
2020-02-05 2019-12-31 13F MARATHON PETE COM 56585A102 3,440 -120 -3.37 207 -4.17 0.0253
2019-11-12 2019-09-30 13F/A-1 MARATHON PETE COM 56585A102 3,560 -1,030 -22.44 216 -17.24 0.0292
2019-10-29 2019-09-30 13F MARATHON PETE COM 56585A102 3,560 -1,030 216 0.0292
2019-08-05 2019-06-30 13F MARATHON PETE COM 56585A102 4,590 664 16.91 261 11.06 0.0354
2019-05-13 2019-03-31 13F MARATHON PETE COM 56585A102 3,926 61 1.58 235 3.07 0.0340
2019-02-12 2018-12-31 13F MARATHON PETE COM 56585A102 3,865 -1,751 -31.18 228 -41.54 0.0369
2018-11-15 2018-09-30 13F MARATHON PETE COM 56585A102 5,616 2,612 86.95 390 84.83 0.0600
2018-08-08 2018-06-30 13F MARATHON PETE COM 56585A102 3,004 3,004 211 0.0342
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.