Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership52,880 shares
Latest Disclosed Value $ 12,912,240
Advisory Services Network, LLC reports 7.17% increase in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 52,880 shares of Marathon Petroleum Corporation (MX:MPC) valued at $12,912,240 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 49,344 shares of Marathon Petroleum Corporation. This represents a change in shares of 7.17% 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 CORP COM Stock 56585A102 52,880 3,536 7.17 12,912 60.92 0.1193
2026-02-17 2025-12-31 13F MARATHON PETE CORP COM Stock 56585A102 49,344 7,554 18.08 8,025 -0.37 0.1136
2025-11-18 2025-09-30 13F MARATHON PETE Stock 56585A102 41,790 67 0.16 8,054 13.44 0.1181
2025-08-19 2025-06-30 13F MARATHON PETE Stock 56585A102 41,723 -8,798 -17.41 7,101 -3.53 0.1143
2025-05-15 2025-03-31 13F MARATHON PETE Stock 56585A102 50,521 -991 -1.92 7,360 2.44 0.1414
2025-02-13 2024-12-31 13F MARATHON PETE Stock 56585A102 51,512 -6,254 -10.83 7,186 -28.30 0.1339
2024-11-14 2024-09-30 13F MARATHON PETE Stock 56585A102 57,766 0 0.00 10,021 0.00 0.2072
2024-08-13 2024-06-30 13F MARATHON PETE Stock 56585A102 57,766 7,123 14.07 10,021 -1.79 0.2072
2024-05-06 2024-03-31 13F MARATHON PETE Stock 56585A102 50,643 -1,004 -1.94 10,204 33.18 0.2263
2024-02-09 2023-12-31 13F MARATHON PETE Stock 56585A102 51,647 -880 -1.68 7,662 -3.61 0.1873
2023-11-14 2023-09-30 13F MARATHON PETE Stock 56585A102 52,527 10,861 26.07 7,949 63.63 0.2135
2023-08-09 2023-06-30 13F MARATHON PETE Stock 56585A102 41,666 -4,824 -10.38 4,858 -22.50 0.1294
2023-05-17 2023-03-31 13F MARATHON PETE Stock 56585A102 46,490 -556 -1.18 6,268 14.48 0.1737
2023-02-13 2022-12-31 13F MARATHON PETE Stock 56585A102 47,046 -849 -1.77 5,476 15.09 0.1678
2022-11-14 2022-09-30 13F MARATHON PETE Stock 56585A102 47,895 8,835 22.62 4,757 48.10 0.1679
2022-08-02 2022-06-30 13F MARATHON PETE Stock 56585A102 39,060 6,294 19.21 3,212 14.63 0.1099
2022-05-23 2022-03-31 13F MARATHON PETE Stock 56585A102 32,766 8,683 36.05 2,802 81.83 0.0825
2022-02-14 2021-12-31 13F MARATHON PETE Stock 56585A102 24,083 -3,937 -14.05 1,541 -11.03 0.0443
2021-11-05 2021-09-30 13F MARATHON PETE Stock 56585A102 28,020 3,882 16.08 1,732 18.71 0.0551
2021-08-12 2021-06-30 13F MARATHON PETE Stock 56585A102 24,138 1,072 4.65 1,459 18.23 0.0460
2021-05-24 2021-03-31 13F MARATHON PETE Stock 56585A102 23,066 -196 -0.84 1,234 28.27 0.0458
2021-02-09 2020-12-31 13F MARATHON PETE Stock 56585A102 23,262 -37,452 -61.69 962 -46.02 0.0386
2020-11-16 2020-09-30 13F MARATHON PETE Stock 56585A102 60,714 5,550 10.06 1,782 -13.58 0.0839
2020-08-10 2020-06-30 13F MARATHON PETROLEUM Stock 56585A102 55,164 29,011 110.93 2,062 233.66 0.1132
2020-05-15 2020-03-31 13F MARATHON PETE Stock 56585A102 26,153 5,205 24.85 618 -51.03 0.0404
2020-02-04 2019-12-31 13F MARATHON PETE Stock 56585A102 20,948 8,631 70.07 1,262 83.43 0.0664
2019-11-04 2019-09-30 13F MARATHON PETE Stock 56585A102 12,317 0 0.00 688 0.00 0.0421
2019-08-01 2019-06-30 13F MARATHON PETE Stock 56585A102 12,317 4,411 55.79 688 45.45 0.0422
2019-05-20 2019-03-31 13F MARATHON PETE Stock 56585A102 7,906 -4,877 -38.15 473 -37.27 0.0332
2019-02-15 2018-12-31 13F MARATHON PETE Stock 56585A102 12,783 -1,937 -13.16 754 -35.94 0.0658
2018-11-02 2018-09-30 13F MARATHON PETE Stock 56585A102 14,720 -206 -1.38 1,177 -1.59 0.0859
2018-07-27 2018-06-30 13F MARATHON PETE Stock 56585A102 14,926 140 0.95 1,196 10.64 0.0911
2018-04-23 2018-03-31 13F MARATHON PETE Stock 56585A102 14,786 8,570 137.87 1,081 163.66 0.0864
2018-02-08 2017-12-31 13F MARATHON PETE Stock 56585A102 6,216 803 14.83 410 34.87 0.0357
2017-10-12 2017-09-30 13F MARATHON PETE Stock 56585A102 5,413 -1,968 -26.66 304 -21.24 0.0348
2017-08-17 2017-06-30 13F MARATHON PETE CORP COM Stock 56585A102 7,381 477 6.91 386 10.60 0.0503
2017-04-28 2017-03-31 13F MARATHON PETE CORP COM Stock 56585A102 6,904 1,339 24.06 349 54.42 0.0507
2016-10-07 2016-09-30 13F MARATHON PETE Stock 56585A102 5,565 1,359 32.31 226 41.25 0.0425
2016-07-27 2016-06-30 13F MARATHON PETE Stock 56585A102 4,206 300 7.68 160 10.34 0.0364
2016-04-21 2016-03-31 13F MARATHON PETE Stock 56585A102 3,906 454 13.15 145 -18.99 0.0396
2016-01-27 2015-12-31 13F MARATHON PETE CORP COM Stock 56585A102 3,452 -612 -15.06 179 -4.79 0.0575
2015-10-01 2015-09-30 13F MARATHON PETE Stock 56585A102 4,064 -8,067 -66.50 188 -70.72 0.0568
2015-07-02 2015-06-30 13F MARATHON PETE Stock 56585A102 12,131 6,436 113.01 642 14.44 0.1894
2015-04-08 2015-03-31 13F MARATHON PETE Stock 56585A102 5,695 4,100 257.05 561 338.28 0.1549
2015-01-23 2014-12-31 13F MARATHON PETE Stock 56585A102 1,595 1,595 0.00 128 0.0400
2014-10-07 2014-09-30 13F MARATHON PETE Stock 56585A102 0 -3,877 -100.00 0 -100.00
2014-07-10 2014-06-30 13F MARATHON PETE Stock 56585A102 3,877 3,367 660.20 303 544.68 0.1283
2014-02-13 2013-12-31 13F MARATHON PETE Stock 56585A102 510 510 47 0.0236
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.