Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionNomura Asset Management Co Ltd
Latest Disclosed Ownership121,547 shares
Latest Disclosed Value $ 29,679,346
Nomura Asset Management Co Ltd reports 0.24% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 11, 2026 - Nomura Asset Management Co Ltd filed a 13F-HR form disclosing ownership of 121,547 shares of Marathon Petroleum Corporation (MX:MPC) valued at $29,679,346 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 121,838 shares of Marathon Petroleum Corporation. This represents a change in shares of -0.24% 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)
2026-05-11 2026-03-31 13F MARATHON PETE COM 56585A102 121,547 -291 -0.24 29,679 49.79 0.0765
2026-02-10 2025-12-31 13F MARATHON PETE COM 56585A102 121,838 -8,722 -6.68 19,815 -21.26 0.0502
2025-11-12 2025-09-30 13F MARATHON PETE COM 56585A102 130,560 -27,383 -17.34 25,164 -4.08 0.0657
2025-08-11 2025-06-30 13F MARATHON PETE COM 56585A102 157,943 11,790 8.07 26,236 23.21 0.0719
2025-05-12 2025-03-31 13F MARATHON PETE COM 56585A102 146,153 7,239 5.21 21,293 9.88 0.0652
2025-02-12 2024-12-31 13F MARATHON PETE COM 56585A102 138,914 -4,723 -3.29 19,379 -17.18 0.0583
2024-11-15 2024-09-30 13F MARATHON PETE COM 56585A102 143,637 7,513 5.52 23,400 -0.91 0.0721
2024-08-14 2024-06-30 13F MARATHON PETE COM 56585A102 136,124 3,722 2.81 23,615 -11.49 0.0805
2024-05-13 2024-03-31 13F MARATHON PETE COM 56585A102 132,402 -5,151 -3.74 26,679 30.73 0.0968
2024-02-09 2023-12-31 13F MARATHON PETE COM 56585A102 137,553 21,847 18.88 20,407 16.54 0.0843
2023-11-03 2023-09-30 13F MARATHON PETE COM 56585A102 115,706 -3,527 -2.96 17,511 25.95 0.0821
2023-08-14 2023-06-30 13F MARATHON PETE COM 56585A102 119,233 -9,500 -7.38 13,903 -19.91 0.0640
2025-01-10 2023-03-31 13F/A-1 MARATHON PETE COM 56585A102 128,733 -6,614 -4.89 17,357 10.18 0.0912
2023-05-11 2023-03-31 13F MARATHON PETE COM 56585A102 128,733 -6,614 17,357 0.0912
2025-01-10 2022-12-31 13F/A-1 MARATHON PETE COM 56585A102 135,347 -4,266 -3.06 15,753 13.60 0.0915
2023-02-14 2022-12-31 13F MARATHON PETE COM 56585A102 135,347 -4,266 15,753 0.0915
2025-01-10 2022-09-30 13F/A-3 MARATHON PETE COM 56585A102 139,613 -3,763 -2.62 13,868 17.66 0.0883
2022-11-14 2022-09-30 13F/A-2 MARATHON PETE COM 56585A102 139,613 -3,763 13,868 0.0883
2022-11-10 2022-09-30 13F/A-1 MARATHON PETE COM 56585A102 139,613 -3,763 13,868 0.0883
2022-11-10 2022-09-30 13F MARATHON PETE COM 56585A102 139,613 -3,763 13,868 0.0558
2025-01-10 2022-06-30 13F/A-1 MARATHON PETE COM 56585A102 143,376 -1,102 -0.76 11,787 -4.58 0.0736
2022-08-12 2022-06-30 13F MARATHON PETE COM 56585A102 143,376 -1,102 11,787 0.0727
2025-01-10 2022-03-31 13F/A-1 MARATHON PETE COM 56585A102 144,478 -5,909 -3.93 12,353 28.36 0.0672
2022-05-13 2022-03-31 13F MARATHON PETE COM 56585A102 144,478 -5,909 12,353 0.0672
2025-01-10 2021-12-31 13F/A-2 MARATHON PETE COM 56585A102 150,387 5,776 3.99 9,623 7.66 0.0486
2022-02-01 2021-12-31 13F MARATHON PETE COM 56585A102 150,387 5,776 9,623 0.0486
2025-01-10 2021-09-30 13F/A-2 MARATHON PETE COM 56585A102 144,611 3,861 2.74 8,938 5.10 0.0504
2021-11-12 2021-09-30 13F MARATHON PETE COM 56585A102 144,611 3,861 8,938 0.0504
2025-01-10 2021-06-30 13F/A-2 MARATHON PETE COM 56585A102 140,750 8,655 6.55 8,504 20.37 0.0492
2021-08-06 2021-06-30 13F MARATHON PETE COM 56585A102 140,750 8,655 8,504 0.0492
2025-01-10 2021-03-31 13F/A-2 MARATHON PETE COM 56585A102 132,095 -1,975 -1.47 7,066 27.41 0.0450
2021-05-14 2021-03-31 13F MARATHON PETE COM 56585A102 132,095 -1,975 7,066 0.0450
2025-01-10 2020-12-31 13F/A-2 MARATHON PETE COM 56585A102 134,070 6,480 5.08 5,545 48.14 0.0373
2021-02-12 2020-12-31 13F MARATHON PETE COM 56585A102 134,070 6,480 5,545 0.0373
2020-11-12 2020-09-30 13F MARATHON PETE COM 56585A102 127,590 -308 -0.24 3,743 -21.71 0.0287
2020-08-13 2020-06-30 13F MARATHON PETE COM 56585A102 127,898 -371 -0.29 4,781 57.84 0.0405
2020-05-14 2020-03-31 13F MARATHON PETE COM 56585A102 128,269 9,727 8.21 3,029 -57.59 0.0313
2020-02-13 2019-12-31 13F MARATHON PETE COM 56585A102 118,542 -2,910 -2.40 7,142 -3.20 0.0640
2019-11-13 2019-09-30 13F MARATHON PETE COM 56585A102 121,452 1,540 1.28 7,378 10.10 0.0705
2019-08-13 2019-06-30 13F MARATHON PETE COM 56585A102 119,912 -5,379 -4.29 6,701 -10.64 0.0662
2019-05-10 2019-03-31 13F/A-1 MARATHON PETE COM 56585A102 125,291 -5,780 -4.41 7,499 -3.04 0.0737
2019-05-10 2019-03-31 13F MARATHON PETE COM 56585A102 125,291 -5,780 7,499
2019-02-12 2018-12-31 13F MARATHON PETE COM 56585A102 131,071 45,043 52.36 7,734 12.41 0.0864
2018-11-07 2018-09-30 13F MARATHON PETE COM 56585A102 86,028 -674 -0.78 6,880 13.10 0.0668
2018-08-03 2018-06-30 13F MARATHON PETE COM 56585A102 86,702 -610 -0.70 6,083 -4.71 0.0632
2018-05-14 2018-03-31 13F MARATHON PETE COM 56585A102 87,312 914 1.06 6,384 12.00 0.0697
2018-02-14 2017-12-31 13F MARATHON PETE COM 56585A102 86,398 -1,570 -1.78 5,700 15.55 0.0660
2017-11-13 2017-09-30 13F MARATHON PETE COM 56585A102 87,968 3,970 4.73 4,933 12.24 0.0637
2017-08-14 2017-06-30 13F MARATHON PETE COM 56585A102 83,998 2,285 2.80 4,395 6.42 0.0591
2017-06-28 2017-03-31 13F/A-1 MARATHON PETE COM 56585A102 81,713 -6,609 -7.48 4,130 -7.46 0.0582
2017-05-12 2017-03-31 13F MARATHON PETROLEUM COM 56585A102 81,713 4,130
2017-02-14 2016-12-31 13F MARATHON PETROLEUM COM 56585A102 88,322 -1,350 -1.51 4,463 22.61 0.0804
2016-11-10 2016-09-30 13F MARATHON PETE COM 56585A102 89,672 1,900 2.16 3,640 9.24 0.0653
2016-08-12 2016-06-30 13F MARATHON PETE COM 56585A102 87,772 1,500 1.74 3,332 3.87 0.0623
2016-05-13 2016-03-31 13F MARATHON PETE COM 56585A102 86,272 7,340 9.30 3,208 -21.60 0.0611
2016-02-12 2015-12-31 13F MARATHON PETE COM 56585A102 78,932 -2,128 -2.63 4,092 8.95 0.0792
2015-11-13 2015-09-30 13F MARATHON PETE COM 56585A102 81,060 1,520 1.91 3,756 -9.73 0.0752
2015-08-14 2015-06-30 13F MARATHON PETE COM 56585A102 79,540 38,820 95.33 4,161 -0.22 0.0770
2015-05-13 2015-03-31 13F MARATHON PETE COM 56585A102 40,720 -1,310 -3.12 4,170 10.43 0.0743
2015-02-13 2014-12-31 13F MARATHON PETE COM 56585A102 42,030 -2,730 -6.10 3,776 0.16 0.0660
2014-11-14 2014-09-30 13F MARATHON PETE COM 56585A102 44,760 930 2.12 3,770 10.40 0.0666
2014-08-14 2014-06-30 13F MARATHON PETE COM 56585A102 43,830 -1,750 -3.84 3,415 -13.78 0.0631
2014-05-14 2014-03-31 13F MARATHON PETE COM 56585A102 45,580 -4,010 -8.09 3,961 -12.93 0.0724
2014-02-14 2013-12-31 13F MARATHON PETE COM 56585A102 49,590 -3,410 -6.43 4,549 33.44 0.0818
2013-11-13 2013-09-30 13F MARATHON PETE COM 56585A102 53,000 -21,712 -29.06 3,409 -35.79 0.0646
2013-08-13 2013-06-30 13F MARATHON PETE COM 56585A102 74,712 74,712 5,309 0.1052
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.