Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership10,429 shares
Latest Disclosed Value $ 2,546,553
Advisors Asset Management, Inc. reports 5.60% increase in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 10,429 shares of Marathon Petroleum Corporation (MX:MPC) valued at $2,546,553 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 9,876 shares of Marathon Petroleum Corporation. This represents a change in shares of 5.60% 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)
2026-05-15 2026-03-31 13F MARATHON PETE COM 56585A102 10,429 553 5.60 2,547 58.53 0.0423
2026-02-12 2025-12-31 13F MARATHON PETE COM 56585A102 9,876 -1,721 -14.84 1,606 -28.14 0.0270
2025-11-06 2025-09-30 13F MARATHON PETE COM 56585A102 11,597 259 2.28 2,235 18.69 0.0379
2025-08-12 2025-06-30 13F MARATHON PETE COM 56585A102 11,338 213 1.91 1,883 16.23 0.0337
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 11,125 412 3.85 1,621 8.43 0.0305
2025-02-10 2024-12-31 13F MARATHON PETE COM 56585A102 10,713 -1,609 -13.06 1,494 -25.56 0.0275
2024-11-08 2024-09-30 13F MARATHON PETE COM 56585A102 12,322 -344 -2.72 2,007 -8.65 0.0369
2024-08-14 2024-06-30 13F MARATHON PETE COM 56585A102 12,666 -2,492 -16.44 2,197 -28.06 0.0429
2024-05-14 2024-03-31 13F MARATHON PETE COM 56585A102 15,158 895 6.27 3,054 44.33 0.0587
2024-02-14 2023-12-31 13F MARATHON PETE COM 56585A102 14,263 -4,346 -23.35 2,116 -24.86 0.0432
2023-11-14 2023-09-30 13F MARATHON PETE COM 56585A102 18,609 122 0.66 2,816 30.67 0.0608
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 18,487 1,096 6.30 2,156 -8.06 0.0440
2023-05-12 2023-03-31 13F MARATHON PETE COM 56585A102 17,391 1,068 6.54 2,345 23.43 0.0477
2023-02-13 2022-12-31 13F MARATHON PETE COM 56585A102 16,323 2,407 17.30 1,900 37.41 0.0391
2022-11-08 2022-09-30 13F MARATHON PETROLEUM COM 56585A102 13,916 2,462 21.49 1,382 46.71 0.0291
2022-08-08 2022-06-30 13F MARATHON PETE COM 56585A102 11,454 2,861 33.29 942 28.16 0.0179
2022-05-17 2022-03-31 13F MARATHON PETE COM 56585A102 8,593 6,616 334.65 735 478.74 0.0113
2022-02-15 2021-12-31 13F MARATHON PETROLEUM COM 56585A102 1,977 824 71.47 127 78.87 0.0018
2021-11-12 2021-09-30 13F MARATHON PETE COM 56585A102 1,153 -4,803 -80.64 71 -80.28 0.0011
2021-07-30 2021-06-30 13F MARATHON PETE COM 56585A102 5,956 -5,367 -47.40 360 -40.59 0.0053
2021-05-07 2021-03-31 13F MARATHON PETE COM 56585A102 11,323 -6,199 -35.38 606 -16.41 0.0094
2021-02-12 2020-12-31 13F MARATHON PETE COM 56585A102 17,522 -16,699 -48.80 725 -27.79 0.0120
2020-11-16 2020-09-30 13F MARATHON PETE COM 56585A102 34,221 -18,917 -35.60 1,004 -49.45 0.0186
2020-08-12 2020-06-30 13F MARATHON PETE COM 56585A102 53,138 -16,066 -23.22 1,986 21.47 0.0387
2020-05-15 2020-03-31 13F MARATHON PETE COM 56585A102 69,204 -27,204 -28.22 1,635 -71.85 0.0389
2020-05-20 2019-12-31 13F/A-1 MARATHON PETE COM 56585A102 96,408 -6,364 -6.19 5,809 -6.95 0.1019
2020-02-14 2019-12-31 13F MARATHON PETE COM 56585A102 96,408 -6,364 5,809 51,415.1423
2019-11-14 2019-09-30 13F MARATHON PETE COM 56585A102 102,772 2,609 2.60 6,243 11.54 0.1150
2019-11-14 2019-06-30 13F/A-1 MARATHON PETROLEUM COM 56585A102 100,163 4,863 5.10 5,597 -1.88 0.1010
2019-08-14 2019-06-30 13F MARATHON PETE COM 56585A102 100,163 4,863 5,597
2019-05-15 2019-03-31 13F MARATHON PETROLEUM COM 56585A102 95,300 -7,385 -7.19 5,704 -5.86 0.1015
2019-02-06 2018-12-31 13F/A-1 MARATHON PETE COM 56585A102 102,685 15,466 17.73 6,059 -13.13 0.1220
2019-01-31 2018-12-31 13F MARATHON PETE COM 56585A102 102,685 15,466 6,059
2018-11-15 2018-09-30 13F MARATHON PETE COM 56585A102 87,219 -7,729 -8.14 6,975 4.70 0.1140
2018-08-22 2018-06-30 13F/A-1 MARATHON PETE COM 56585A102 94,948 -16,473 -14.78 6,662 -6.67 0.1132
2018-08-15 2018-06-30 13F MARATHON PETE COM 56585A102 94,948 -16,473 6,662
2018-05-15 2018-03-31 13F MARATHON PETE COM 56585A102 111,421 -12,435 -10.04 7,138 -12.65 0.1196
2018-02-13 2017-12-31 13F MARATHON PETE COM 56585A102 123,856 3,394 2.82 8,172 20.96 0.1343
2017-11-07 2017-09-30 13F MARATHON PETE COM 56585A102 120,462 -3,955 -3.18 6,756 3.76 0.1132
2017-08-02 2017-06-30 13F MARATHON PETE COM 56585A102 124,417 3,675 3.04 6,511 6.70 0.1088
2017-05-02 2017-03-31 13F MARATHON PETE COM 56585A102 120,742 4,056 3.48 6,102 28.84 0.1023
2016-10-31 2016-09-30 13F MARATHON PETE COM 56585A102 116,686 -38,348 -24.74 4,736 -19.52 0.0777
2016-08-08 2016-06-30 13F MARATHON PETE COM 56585A102 155,034 25,030 19.25 5,885 21.74 0.0954
2016-05-16 2016-03-31 13F MARATHON PETE COM 56585A102 130,004 8,450 6.95 4,834 -23.28 0.0804
2016-02-10 2015-12-31 13F MARATHON PETE COM 56585A102 121,554 -15,694 -11.43 6,301 -0.91 0.1000
2015-11-16 2015-09-30 13F MARATHON PETE COM 56585A102 137,248 -14,998 -9.85 6,359 -20.15 0.1014
2015-08-11 2015-06-30 13F MARATHON PETE COM 56585A102 152,246 72,917 91.92 7,964 -1.95 0.1093
2015-05-13 2015-03-31 13F MARATHON PETE COM 56585A102 79,329 30,723 63.21 8,122 85.14 0.1082
2015-02-05 2014-12-31 13F MARATHON PETE COM 56585A102 48,606 28,207 138.28 4,387 154.02 0.0588
2014-11-13 2014-09-30 13F MARATHON PETE COM 56585A102 20,399 3,263 19.04 1,727 29.07 0.0238
2014-08-14 2014-06-30 13F MARATHON PETE COM 56585A102 17,136 2,961 20.89 1,338 8.43 0.0185
2014-05-15 2014-03-31 13F MARATHON PETE COM 56585A102 14,175 4,227 42.49 1,234 35.16 0.0187
2014-02-03 2013-12-31 13F MARATHON PETE COM 56585A102 9,948 1,233 14.15 913 62.75 0.0147
2013-11-15 2013-09-30 13F MARATHON PETE COM 56585A102 8,715 3,095 55.07 561 40.60 0.0100
2013-08-14 2013-06-30 13F MARATHON PETE COM 56585A102 5,620 5,620 399 0.0075
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.