Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionCarnegie Capital Asset Management, LLC
Latest Disclosed Ownership31,966 shares
Latest Disclosed Value $ 7,805,458
Carnegie Capital Asset Management, LLC reports 5.51% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 1, 2026 - Carnegie Capital Asset Management, LLC filed a 13F-HR form disclosing ownership of 31,966 shares of Marathon Petroleum Corporation (MX:MPC) valued at $7,805,458 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 33,830 shares of Marathon Petroleum Corporation. This represents a change in shares of -5.51% 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)
2026-05-01 2026-03-31 13F MARATHON PETE COM 56585A102 31,966 -1,864 -5.51 7,805 41.88 0.1521
2026-01-23 2025-12-31 13F MARATHON PETE COM 56585A102 33,830 -1,197 -3.42 5,502 -18.52 0.1015
2025-10-16 2025-09-30 13F MARATHON PETE COM 56585A102 35,027 122 0.35 6,751 16.44 0.1273
2025-07-31 2025-06-30 13F MARATHON PETE COM 56585A102 34,905 -30 -0.09 5,798 30.26 0.1165
2025-05-06 2025-03-31 13F MARATHON PETE COM 56585A102 34,935 8,383 31.57 4,452 20.17 0.1057
2025-01-15 2024-12-31 13F MARATHON PETE COM 56585A102 26,552 -2,635 -9.03 3,704 -22.09 0.1064
2024-10-10 2024-09-30 13F MARATHON PETE COM 56585A102 29,187 1,689 6.14 4,755 -0.34 0.1400
2024-07-22 2024-06-30 13F MARATHON PETE COM 56585A102 27,498 -295 -1.06 4,770 -14.82 0.1487
2024-05-06 2024-03-31 13F MARATHON PETE COM 56585A102 27,793 -7,377 -20.98 5,600 7.34 0.1743
2024-01-30 2023-12-31 13F MARATHON PETE COM 56585A102 35,170 -750 -2.09 5,218 -4.03 0.1790
2023-10-11 2023-09-30 13F MARATHON PETE COM 56585A102 35,920 -3,575 -9.05 5,436 18.05 0.2087
2023-08-04 2023-06-30 13F MARATHON PETE COM 56585A102 39,495 -293 -0.74 4,605 -14.15 0.1704
2023-04-20 2023-03-31 13F MARATHON PETE COM 56585A102 39,788 -8,621 -17.81 5,365 -4.79 0.2139
2023-01-24 2022-12-31 13F MARATHON PETE COM 56585A102 48,409 -2,918 -5.69 5,634 10.51 0.2423
2022-10-14 2022-09-30 13F MARATHON PETE COM 56585A102 51,327 -430 -0.83 5,098 19.81 0.2431
2022-08-02 2022-06-30 13F/A-1 MARATHON PETE COM 56585A102 51,757 -530 -1.01 4,255 -4.83 0.1922
2022-07-13 2022-06-30 13F MARATHON PETE COM 56585A102 4,297 -47,990 260 0.0099
2022-04-11 2022-03-31 13F MARATHON PETE COM 56585A102 52,287 -7,840 -13.04 4,471 16.19 0.1630
2022-01-21 2021-12-31 13F MARATHON PETE COM 56585A102 60,127 55,875 1,314.09 3,848 1,363.12 0.1269
2021-10-08 2021-09-30 13F MARATHON PETE COM 56585A102 4,252 -45 -1.05 263 1.15 0.0099
2021-07-16 2021-06-30 13F MARATHON PETE COM 56585A102 4,297 120 2.87 260 16.59 0.0098
2021-04-12 2021-03-31 13F MARATHON PETE COM 56585A102 4,177 -800 -16.07 223 8.25 0.0093
2021-02-08 2020-12-31 13F MARATHON PETE COM 56585A102 4,977 4,977 206 0.0093
2020-05-08 2020-03-31 13F MARATHON PETE COM 56585A102 0 -6,911 -100.00 0 -100.00
2020-02-13 2019-12-31 13F MARATHON PETE COM 56585A102 6,911 -496 -6.70 416 -7.56 0.0240
2019-11-20 2019-09-30 13F MARATHON PETE COM 56585A102 7,407 196 2.72 450 11.66 0.0287
2019-07-24 2019-06-30 13F MARATHON PETE COM 56585A102 7,211 -1,498 -17.20 403 -22.65 0.0262
2019-05-14 2019-03-31 13F MARATHON PETE COM 56585A102 8,709 -251 -2.80 521 -1.51 0.0358
2019-02-14 2018-12-31 13F MARATHON PETE COM 56585A102 8,960 -4,397 -32.92 529 -39.61 0.0491
2018-11-27 2018-09-30 13F MARATHON PETE COM 56585A102 13,357 4,321 47.82 876 20.99 0.0719
2018-08-16 2018-06-30 13F MARATHON PETE COM 56585A102 9,036 -350 -3.73 724 -0.28 0.0551
2018-05-15 2018-03-31 13F MARATHON PETE COM 56585A102 9,386 -3,333 -26.20 726 -12.32 0.0609
2018-02-12 2017-12-31 13F MARATHON PETE COM 56585A102 12,719 3,096 32.17 828 52.77 0.0734
2017-11-14 2017-09-30 13F MARATHON PETE COM 56585A102 9,623 394 4.27 542 4.43 0.0634
2017-08-14 2017-06-30 13F MARATHON PETE COM 56585A102 9,229 2 0.02 519 7.45 0.0632
2017-05-15 2017-03-31 13F MARATHON PETE COM 56585A102 9,227 -199 -2.11 483 0.42 0.0599
2017-01-12 2016-12-31 13F MARATHON PETE COM 56585A102 9,426 4 0.04 481 22.08 0.0640
2016-11-14 2016-09-30 13F MARATHON PETE COM 56585A102 9,422 2,388 33.95 394 48.12 0.0568
2016-08-02 2016-06-30 13F MARATHON PETE COM 56585A102 7,034 953 15.67 266 17.70 0.0375
2016-04-13 2016-03-31 13F MARATHON PETE COM 56585A102 6,081 -196 -3.12 226 -13.74 0.0346
2016-02-03 2015-12-31 13F MARATHON PETE COM 56585A102 6,277 -384 -5.76 262 -19.63 0.0455
2015-11-05 2015-09-30 13F MARATHON PETE COM 56585A102 6,661 915 15.92 326 8.31 0.0560
2015-08-13 2015-06-30 13F MARATHON PETE COM 56585A102 5,746 2,873 100.00 301 6.74 0.0526
2015-05-05 2015-03-31 13F MARATHON PETE COM 56585A102 2,873 0 0.00 282 7.63 0.0487
2015-02-18 2014-12-31 13F MARATHON PETE COM 56585A102 2,873 -150 -4.96 262 2.34 0.0491
2014-10-10 2014-09-30 13F MARATHON PETE COM 56585A102 3,023 -190 -5.91 256 1.99 0.0509
2014-08-12 2014-06-30 13F MARATHON PETE COM 56585A102 3,213 363 12.74 251 1.21 0.0571
2014-05-08 2014-03-31 13F MARATHON PETE COM 56585A102 2,850 0 0.00 248 -4.98 0.0654
2014-02-04 2013-12-31 13F MARATHON PETE COM 56585A102 2,850 -49 -1.69 261 26.70 0.0700
2013-08-02 2013-06-30 13F MARATHON PETE COM 56585A102 2,899 2,899 206 0.0677
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.