Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionNikko Asset Management Americas, Inc.
Latest Disclosed Ownership3,383 shares
Latest Disclosed Value $ 826,162
Nikko Asset Management Americas, Inc. reports 2.11% increase in ownership of MPC / Marathon Petroleum Corporation

On May 7, 2026 - Nikko Asset Management Americas, Inc. filed a 13F-HR form disclosing ownership of 3,383 shares of Marathon Petroleum Corporation (MX:MPC) valued at $826,162 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 3,313 shares of Marathon Petroleum Corporation. This represents a change in shares of 2.11% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-07 2026-03-31 13F MARATHON PETROLEUM COM 56585A102 3,383 70 2.11 826 53.53 0.0117
2026-02-11 2025-12-31 13F MARATHON PETROLEUM COM 56585A102 3,313 -38 -1.13 539 -16.59 0.0062
2025-11-12 2025-09-30 13F MARATHON PETROLEUM COM 56585A102 3,351 -65 -1.90 646 13.76 0.0063
2025-08-11 2025-06-30 13F MARATHON PETROLEUM COM 56585A102 3,416 554 19.36 567 36.30 0.0057
2025-05-07 2025-03-31 13F MARATHON PETROLEUM COM 56585A102 2,862 -41 -1.41 417 2.97 0.0054
2025-02-10 2024-12-31 13F MARATHON PETROLEUM COM 56585A102 2,903 -315 -9.79 405 -22.90 0.0044
2024-11-07 2024-09-30 13F MARATHON PETROLEUM COM 56585A102 3,218 -210 -6.13 524 -11.78 0.0059
2024-08-09 2024-06-30 13F MARATHON PETROLEUM COM 56585A102 3,428 -1,598 -31.79 595 -41.30 0.0069
2024-05-02 2024-03-31 13F MARATHON PETROLEUM COM 56585A102 5,026 -262 -4.95 1,013 29.08 0.0101
2024-02-08 2023-12-31 13F MARATHON PETROLEUM COM 56585A102 5,288 -4,406 -45.45 784 -46.56 0.0075
2023-11-09 2023-09-30 13F MARATHON PETROLEUM COM 56585A102 9,694 -1,903 -16.41 1,467 8.51 0.0175
2023-08-14 2023-06-30 13F MARATHON PETROLEUM COM 56585A102 11,597 1,303 12.66 1,352 -6.05 0.0142
2023-05-03 2023-03-31 13F MARATHON PETROLEUM COM 56585A102 10,294 -2,226 -17.78 1,439 -1.24 0.0166
2023-02-13 2022-12-31 13F MARATHON PETROLEUM COM 56585A102 12,520 -6,114 -32.81 1,457 -23.40 0.0210
2022-11-14 2022-09-30 13F MARATHON PETROLEUM COM 56585A102 18,634 -3,397 -15.42 1,902 4.79 0.0243
2022-08-04 2022-06-30 13F MARATHON PETROLEUM COM 56585A102 22,031 -2,110 -8.74 1,815 -10.72 0.0224
2022-05-06 2022-03-31 13F MARATHON PETROLEUM COM 56585A102 24,141 -1,851 -7.12 2,033 22.25 0.0149
2022-02-08 2021-12-31 13F MARATHON PETROLEUM COM 56585A102 25,992 -3,048 -10.50 1,663 -7.04 0.0087
2021-11-09 2021-09-30 13F MARATHON PETROLEUM COM 56585A102 29,040 -2,250 -7.19 1,789 -6.43 0.0077
2021-08-09 2021-06-30 13F MARATHON PETROLEUM COM 56585A102 31,290 -1,368 -4.19 1,912 9.44 0.0075
2021-05-03 2021-03-31 13F Marathon Petroleum COM 56585A102 32,658 -7,320 -18.31 1,747 5.69 0.0086
2021-02-11 2020-12-31 13F Marathon Petroleum COM 56585A102 39,978 -15,775 -28.29 1,653 1.04 0.0094
2020-11-02 2020-09-30 13F MARATHON PETROLEUM COM 56585A102 55,753 -2,692 -4.61 1,636 -24.33 0.0145
2020-08-07 2020-06-30 13F MARATHON PETROLEUM COM 56585A102 58,445 4,291 7.92 2,162 69.04 0.0283
2020-05-04 2020-03-31 13F/A-1 Marathon Petroleum COM 56585A102 54,154 -13,145 -19.53 1,279 -68.46 0.0238
2020-04-30 2020-03-31 13F Marathon Petroleum COM 56585A102 54,154 -13,145 1,279 24,233.0863
2020-02-06 2019-12-31 13F Marathon Petroleum COM 56585A102 67,299 -9,177 -12.00 4,055 -12.72 0.0639
2019-10-29 2019-09-30 13F Marathon Petroleum COM 56585A102 76,476 -7,863 -9.32 4,646 -1.42 0.0825
2019-07-29 2019-06-30 13F Marathon Petroleum COM 56585A102 84,339 24,913 41.92 4,713 32.50 0.0925
2019-04-30 2019-03-31 13F Marathon Petroleum COM 56585A102 59,426 -5,422 -8.36 3,557 -7.06 0.0938
2019-02-08 2018-12-31 13F Marathon Petroleum COM 56585A102 64,848 27,911 75.56 3,827 26.81 0.1322
2018-10-15 2018-09-30 13F Marathon Petroleum COM 56585A102 36,937 -25,341 -40.69 3,018 -30.92 0.0839
2018-07-20 2018-06-30 13F Marathon Petroleum COM 56585A102 62,278 2,432 4.06 4,369 -0.14 0.1306
2018-04-23 2018-03-31 13F Marathon Petroleum COM 56585A102 59,846 -100,154 -62.60 4,375 -55.48 0.1556
2018-02-14 2017-12-31 13F Marathon Petroleum COM 56585A102 160,000 86,200 116.80 9,826 137.40 0.2559
2017-10-10 2017-09-30 13F Marathon Petroleum COM 56585A102 73,800 1,000 1.37 4,139 8.64 0.2023
2017-08-04 2017-06-30 13F Marathon Petroleum COM 56585A102 72,800 25,300 53.26 3,810 58.68 0.2269
2017-04-26 2017-03-31 13F Marathon Petroleum COM 56585A102 47,500 17,000 55.74 2,401 56.32 0.1770
2017-02-14 2016-12-31 13F Marathon Petroleum COM 56585A102 30,500 30,500 0.00 1,536 0.1236
2016-10-28 2016-09-30 13F MARATHON PETROLEUM COM 56585A102 0 -7,300 -100.00 0 -100.00
2016-07-19 2016-06-30 13F MARATHON PETROLEUM COM 56585A102 7,300 7,300 272 0.0259
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.