Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionMercer Global Advisors Inc /adv
Latest Disclosed Ownership79,584 shares
Latest Disclosed Value $ 19,432,867
Mercer Global Advisors Inc /adv reports 2.79% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Mercer Global Advisors Inc /adv filed a 13F-HR form disclosing ownership of 79,584 shares of Marathon Petroleum Corporation (MX:MPC) valued at $19,432,867 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 81,864 shares of Marathon Petroleum Corporation. This represents a change in shares of -2.79% 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 79,584 -2,280 -2.79 19,433 45.96 0.0288
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 81,864 6,415 8.50 13,314 -8.45 0.0203
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 75,449 4,527 6.38 14,542 23.45 0.0243
2025-08-14 2025-06-30 13F MARATHON PETE COM 56585A102 70,922 -31,289 -30.61 11,781 -20.89 0.0240
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 102,211 -24,055 -19.05 14,891 -15.46 0.0342
2025-02-14 2024-12-31 13F MARATHON PETE COM 56585A102 126,266 -53,811 -29.88 17,614 -41.00 0.0430
2024-11-14 2024-09-30 13F MARATHON PETE COM 56585A102 180,077 -2,646 -1.45 29,855 -5.82 0.0699
2024-08-12 2024-06-30 13F MARATHON PETE COM 56585A102 182,723 11,882 6.96 31,700 93,132.35 0.0864
2024-05-15 2024-03-31 13F MARATHON PETE COM 56585A102 170,841 72,339 73.44 34 142.86 0.0981
2024-02-15 2023-12-31 13F MARATHON PETE COM 56585A102 98,502 3,585 3.78 15 0.00 0.0440
2023-11-15 2023-09-30 13F/A-1 MARATHON PETE COM 56585A102 94,917 -7,241 -7.09 14 27.27 0.0546
2023-11-14 2023-09-30 13F MARATHON PETE COM 56585A102 94,917 -7,241 14 0.0545
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 102,158 18,248 21.75 12 0.00 0.0473
2023-05-16 2023-03-31 13F MARATHON PETE COM 56585A102 83,910 17,814 26.95 11 57.14 0.0514
2023-02-09 2022-12-31 13F MARATHON PETE COM 56585A102 66,096 15,647 31.02 8 -99.86 0.0385
2022-11-15 2022-09-30 13F MARATHON PETE COM 56585A102 50,449 6,779 15.52 5,011 39.58 0.0297
2022-08-10 2022-06-30 13F MARATHON PETE COM 56585A102 43,670 -2,075 -4.54 3,590 -8.21 0.0220
2022-05-10 2022-03-31 13F MARATHON PETE COM 56585A102 45,745 10,806 30.93 3,911 74.91 0.0230
2022-02-04 2021-12-31 13F MARATHON PETE COM 56585A102 34,939 3,372 10.68 2,236 14.61 0.0138
2021-11-10 2021-09-30 13F MARATHON PETE COM 56585A102 31,567 0 0.00 1,951 2.31 0.0136
2021-08-10 2021-06-30 13F MARATHON PETE COM 56585A102 31,567 1,732 5.81 1,907 19.49 0.0147
2021-08-10 2021-03-31 13F/A-1 MARATHON PETE COM 56585A102 29,835 -7,848 -20.83 1,596 2.37 0.0145
2021-05-11 2021-03-31 13F MARATHON PETE COM 56585A102 29,272 -8,411 1,566 0.0150
2021-02-12 2020-12-31 13F MARATHON PETE COM 56585A102 37,683 2,291 6.47 1,559 50.19 0.0195
2020-12-10 2020-09-30 13F MARATHON PETE COM 56585A102 35,392 -5,606 -13.67 1,038 -32.29 0.0156
2020-08-10 2020-06-30 13F MARATHON PETE COM 56585A102 40,998 -2,770 -6.33 1,533 48.26 0.0278
2020-05-18 2020-03-31 13F MARATHON PETE COM 56585A102 43,768 11,145 34.16 1,034 -47.41 0.0228
2020-02-13 2019-12-31 13F MARATHON PETE CORP COM COM 56585A102 32,623 -2,822 -7.96 1,966 -8.69 0.0393
2019-11-12 2019-09-30 13F MARATHON PETE CORP COM COM 56585A102 35,445 -3,440 -8.85 2,153 -0.92 0.0506
2019-08-14 2019-06-30 13F MARATHON PETE CORP COM COM 56585A102 38,885 5,107 15.12 2,173 7.47 0.0576
2019-04-23 2019-03-31 13F/A-1 MARATHON PETE CORP COM COM 56585A102 33,778 33,778 2,022 0.0727
2019-04-12 2019-03-31 13F MARATHON PETE CORP COM COM 56585A102 29,249 1,726 0.0920
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.