Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionC M Bidwell & Associates Ltd
Latest Disclosed Ownership1,468 shares
Latest Disclosed Value $ 358,456
C M Bidwell & Associates Ltd reports 1.28% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 14, 2026 - C M Bidwell & Associates Ltd filed a 13F-HR form disclosing ownership of 1,468 shares of Marathon Petroleum Corporation (MX:MPC) valued at $358,456 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,487 shares of Marathon Petroleum Corporation. This represents a change in shares of -1.28% 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)
2026-05-14 2026-03-31 13F Marathon Petroleum COM 56585A102 1,468 -19 -1.28 358 48.55 0.1674
2026-02-13 2025-12-31 13F Marathon Petroleum COM 56585A102 1,487 -335 -18.39 242 -31.34 0.1142
2025-11-13 2025-09-30 13F Marathon Petroleum COM 56585A102 1,822 162 9.76 351 27.64 0.1689
2025-08-14 2025-06-30 13F Marathon Petroleum COM 56585A102 1,660 -848 -33.81 276 -24.66 0.1431
2025-05-15 2025-03-31 13F Marathon Petroleum COM 56585A102 2,508 -5 -0.20 365 4.29 0.2199
2025-02-12 2024-12-31 13F Marathon Petroleum COM 56585A102 2,513 -18 -0.71 351 -15.05 0.2131
2024-11-13 2024-09-30 13F Marathon Petroleum COM 56585A102 2,531 447 21.45 412 14.13 0.2522
2024-08-13 2024-06-30 13F Marathon Petroleum COM 56585A102 2,084 -1 -0.05 362 -14.05 0.2421
2024-05-14 2024-03-31 13F Marathon Petroleum COM 56585A102 2,085 1,318 171.84 420 271.68 0.2860
2024-02-14 2023-12-31 13F Marathon Petroleum COM 56585A102 767 43 5.94 114 3.67 0.0844
2023-11-13 2023-09-30 13F Marathon Petroleum COM 56585A102 724 -22 -2.95 110 26.74 0.0833
2023-08-14 2023-06-30 13F Marathon Petroleum COM 56585A102 746 -324 -30.28 87 -40.28 0.0636
2023-05-12 2023-03-31 13F Marathon Petroleum COM 56585A102 1,070 -15 -1.38 144 14.29 0.1094
2023-02-10 2022-12-31 13F Marathon Petroleum COM 56585A102 1,085 0 0.00 126 16.67 0.0997
2022-11-14 2022-09-30 13F Marathon Petroleum COM 56585A102 1,085 1,085 108 0.0896
2022-02-11 2021-12-31 13F Marathon Petroleum COM 56585A102 0 -22 -100.00 0 -100.00
2021-11-12 2021-09-30 13F Marathon Petroleum COM 56585A102 22 0 0.00 1 0.00 0.0007
2021-08-13 2021-06-30 13F Marathon Petroleum COM 56585A102 22 22 1 0.0007
2019-02-14 2018-12-31 13F Marathon Petroleum COM 56585A102 0 -3,890 -100.00 0 -100.00
2018-11-13 2018-09-30 13F Marathon Petroleum COM 56585A102 3,890 3,890 311 0.2945
2018-02-02 2017-12-31 13F Marathon Petroleum COM 56585A102 0 -126,350 -100.00 0 -100.00
2017-08-14 2017-06-30 13F Marathon Petroleum COM 56585A102 126,350 78,705 165.19 6,612 174.58 1.4110
2017-05-12 2017-03-31 13F Marathon Petroleum COM 56585A102 47,645 0 0.00 2,408 0.38 0.5418
2017-02-13 2016-12-31 13F Marathon Petroleum COM 56585A102 47,645 6,055 14.56 2,399 42.12 0.5656
2016-11-14 2016-09-30 13F Marathon Petroleum COM 56585A102 41,590 -4,585 -9.93 1,688 -58.00 0.4024
2014-05-12 2014-03-31 13F Marathon Petroleum COM 56585A102 46,175 0 0.00 4,019 -5.12 0.9652
2014-02-12 2013-12-31 13F Marathon Petroleum COM 56585A102 46,175 46,175 4,236 1.0484
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.