Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionSigma Planning Corp
Latest Disclosed Ownership8,273 shares
Latest Disclosed Value $ 2,020,112
Sigma Planning Corp reports 2.67% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 4, 2026 - Sigma Planning Corp filed a 13F-HR form disclosing ownership of 8,273 shares of Marathon Petroleum Corporation (MX:MPC) valued at $2,020,112 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 8,500 shares of Marathon Petroleum Corporation. This represents a change in shares of -2.67% 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 8,273 -227 -2.67 2,020 46.16 0.0561
2026-01-30 2025-12-31 13F MARATHON PETE COM 56585A102 8,500 165 1.98 1,382 -13.95 0.0382
2025-11-10 2025-09-30 13F MARATHON PETE COM 56585A102 8,335 -4,391 -34.50 1,606 -23.99 0.0457
2025-08-05 2025-06-30 13F MARATHON PETE COM 56585A102 12,726 1,238 10.78 2,114 26.30 0.0636
2025-05-02 2025-03-31 13F MARATHON PETE COM 56585A102 11,488 2 0.02 1,674 4.43 0.0534
2025-02-03 2024-12-31 13F MARATHON PETE COM 56585A102 11,486 1,227 11.96 1,602 -4.13 0.0503
2024-11-04 2024-09-30 13F MARATHON PETE COM 56585A102 10,259 444 4.52 1,671 -1.82 0.0512
2024-08-06 2024-06-30 13F MARATHON PETE COM 56585A102 9,815 2,238 29.54 1,703 11.53 0.0540
2024-05-02 2024-03-31 13F MARATHON PETE COM 56585A102 7,577 1,498 24.64 1,527 69.37 0.0480
2024-02-01 2023-12-31 13F MARATHON PETE COM 56585A102 6,079 -2,147 -26.10 902 -27.57 0.0706
2023-11-06 2023-09-30 13F MARATHON PETE COM 56585A102 8,226 181 2.25 1,245 32.62 0.0467
2023-08-02 2023-06-30 13F MARATHON PETE COM 56585A102 8,045 -3,239 -28.70 938 -38.33 0.0337
2023-05-08 2023-03-31 13F MARATHON PETE COM 56585A102 11,284 -58 -0.51 1,522 15.23 0.0506
2023-01-24 2022-12-31 13F MARATHON PETE COM 56585A102 11,342 2,275 25.09 1,320 46.50 0.0472
2022-11-10 2022-09-30 13F MARATHON PETE COM 56585A102 9,067 -189 -2.04 901 18.40 0.0343
2022-08-11 2022-06-30 13F MARATHON PETE COM 56585A102 9,256 1,014 12.30 761 7.94 0.0264
2022-04-20 2022-03-31 13F MARATHON PETE COM 56585A102 8,242 -1,058 -11.38 705 18.49 0.0211
2022-02-02 2021-12-31 13F MARATHON PETE Stock 56585A102 9,300 -4 -0.04 595 3.48 0.0166
2021-10-28 2021-09-30 13F MARATHON PETE COM 56585A102 9,304 -259 -2.71 575 -0.52 0.0173
2021-08-13 2021-06-30 13F MARATHON PETE Stock 56585A102 9,563 -297 -3.01 578 9.68 0.0172
2021-05-06 2021-03-31 13F MARATHON PETE Stock 56585A102 9,860 787 8.67 527 40.53 0.0168
2021-02-09 2020-12-31 13F MARATHON PETE COM 56585A102 9,073 -737 -7.51 375 30.21 0.0128
2020-11-03 2020-09-30 13F MARATHON PETE COM 56585A102 9,810 -6,437 -39.62 288 -52.55 0.0114
2020-07-31 2020-06-30 13F MARATHON PETE COM 56585A102 16,247 6,903 73.88 607 174.66 0.0266
2020-05-01 2020-03-31 13F MARATHON PETE COM 56585A102 9,344 -648 -6.49 221 -63.29 0.0131
2020-02-03 2019-12-31 13F MARATHON PETE COM 56585A102 9,992 -7,090 -41.51 602 -42.00 0.0254
2019-11-01 2019-09-30 13F MARATHON PETE COM 56585A102 17,082 -379 -2.17 1,038 6.35 0.0498
2019-08-01 2019-06-30 13F MARATHON PETE COM 56585A102 17,461 6,059 53.14 976 43.11 0.0503
2019-05-01 2019-03-31 13F MARATHON PETE COM 56585A102 11,402 2,763 31.98 682 33.73 0.0387
2019-01-31 2018-12-31 13F MARATHON PETE COM 56585A102 8,639 4,927 132.73 510 71.72 0.0371
2018-11-07 2018-09-30 13F MARATHON PETE COM 56585A102 3,712 345 10.25 297 25.85 0.0175
2018-08-02 2018-06-30 13F MARATHON PETE COM 56585A102 3,367 118 3.63 236 -0.84 0.0158
2018-05-11 2018-03-31 13F MARATHON PETE COM 56585A102 3,249 -147 -4.33 238 6.25 0.0174
2018-02-07 2017-12-31 13F MARATHON PETE COM 56585A102 3,396 -1,311 -27.85 224 -15.15 0.0173
2017-11-06 2017-09-30 13F MARATHON PETE COM 56585A102 4,707 837 21.63 264 30.05 0.0218
2017-08-02 2017-06-30 13F MARATHON PETE COM 56585A102 3,870 -456 -10.54 203 -7.31 0.0191
2017-04-24 2017-03-31 13F MARATHON PETE COM 56585A102 4,326 4,326 219 0.0212
2016-01-20 2015-12-31 13F MARATHON PETE COM 56585A102 0 -4,522 -100.00 0 -100.00
2015-11-02 2015-09-30 13F MARATHON PETE COM 56585A102 4,522 -422 -8.54 210 -18.92 0.0333
2015-07-14 2015-06-30 13F MARATHON PETE COM 56585A102 4,944 4,944 259 0.0358
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.