Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionProspera Financial Services Inc
Latest Disclosed Ownership7,000 shares
Latest Disclosed Value $ 1,710,964
Prospera Financial Services Inc reports 10.27% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 14, 2026 - Prospera Financial Services Inc filed a 13F-HR form disclosing ownership of 7,000 shares of Marathon Petroleum Corporation (US:MPC) valued at $1,709,260 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 7,801 shares of Marathon Petroleum Corporation. This represents a change in shares of -10.27% during the quarter. The current value of the position is $1,870,470 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)
2026-04-14 2026-03-31 13F MARATHON PETE COM 56585A102 7,000 -801 -10.27 1,711 34.75 0.0276
2026-02-09 2025-12-31 13F MARATHON PETE COM 56585A102 7,801 -535 -6.42 1,270 -21.08 0.0208
2025-11-06 2025-09-30 13F MARATHON PETE COM 56585A102 8,336 -214 -2.50 1,608 13.16 0.0274
2025-08-06 2025-06-30 13F MARATHON PETE COM 56585A102 8,550 542 6.77 1,421 21.77 0.0265
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 8,008 599 8.08 1,168 12.86 0.0268
2025-02-13 2024-12-31 13F MARATHON PETE COM 56585A102 7,409 -205 -2.69 1,034 -16.68 0.0241
2024-11-07 2024-09-30 13F MARATHON PETE COM 56585A102 7,614 -209 -2.67 1,241 -8.62 0.0317
2024-08-13 2024-06-30 13F MARATHON PETE COM 56585A102 7,823 934 13.56 1,358 -2.23 0.0378
2024-08-13 2024-03-31 13F MARATHON PETE COM 56585A102 6,889 -92 -1.32 1,389 34.20 0.0414
2024-02-14 2023-12-31 13F MARATHON PETE COM 56585A102 6,981 768 12.36 1,036 10.11 0.0343
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 6,213 -1,444 -18.86 941 5.26 0.0364
2023-08-08 2023-06-30 13F MARATHON PETE COM 56585A102 7,657 298 4.05 893 -9.98 0.0342
2023-05-12 2023-03-31 13F MARATHON PETE COM 56585A102 7,359 23 0.31 992 16.30 0.0408
2023-02-08 2022-12-31 13F MARATHON PETE COM 56585A102 7,336 2,318 46.19 854 71.29 0.0428
2022-10-27 2022-09-30 13F MARATHON PETE COM 56585A102 5,018 -1,210 -19.43 498 -2.73 0.0260
2022-08-08 2022-06-30 13F MARATHON PETE COM 56585A102 6,228 -205 -3.19 512 -6.91 0.0261
2022-05-04 2022-03-31 13F MARATHON PETE COM 56585A102 6,433 3,175 97.45 550 164.42 0.0230
2022-02-10 2021-12-31 13F MARATHON PETE COM 56585A102 3,258 3,258 208 0.0090
2021-02-12 2020-12-31 13F MARATHON PETE COM 56585A102 0 -981 -100.00 0 -100.00
2020-11-04 2020-09-30 13F MARATHON PETE COM 56585A102 981 -132,893 -99.27 29 -99.42 0.0111
2020-08-10 2020-06-30 13F MARATHON PETE COM 56585A102 133,874 133,874 5,004 0.4434
2019-10-22 2019-09-30 13F MARATHON PETE COM 56585A102 0 -3,626 -100.00 0 -100.00
2019-08-14 2019-06-30 13F MARATHON PETE COM 56585A102 3,626 -594 -14.08 221 -17.23 0.0446
2019-05-02 2019-03-31 13F MARATHON PETE COM 56585A102 4,220 594 16.38 267 20.81 0.0879
2019-02-13 2018-12-31 13F MARATHON PETE COM 56585A102 3,626 -1,466 -28.79 221 -48.36 0.0446
2018-10-25 2018-09-30 13F MARATHON PETE COM 56585A102 5,092 -342 -6.29 428 13.23 0.0798
2018-07-18 2018-06-30 13F MARATHON PETE COM 56585A102 5,434 73 1.36 378 -2.83 0.0512
2018-04-12 2018-03-31 13F MARATHON PETE COM 56585A102 5,361 5,361 389 0.0543
2016-04-12 2016-03-31 13F MARATHON PETE COM 56585A102 0 -5,728 -100.00 0 -100.00
2016-01-12 2015-12-31 13F MARATHON PETE COM 56585A102 5,728 5,728 297 0.0651
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.