Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionMitsubishi UFJ Trust & Banking Corp
Latest Disclosed Ownership232,502 shares
Latest Disclosed Value $ 56,772,338
Mitsubishi UFJ Trust & Banking Corp reports 16.59% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 12, 2026 - Mitsubishi UFJ Trust & Banking Corp filed a 13F-HR form disclosing ownership of 232,502 shares of Marathon Petroleum Corporation (MX:MPC) valued at $56,772,338 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 278,734 shares of Marathon Petroleum Corporation. This represents a change in shares of -16.59% 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)
2026-05-12 2026-03-31 13F MARATHON PETROLEUM COM 56585A102 232,502 -46,232 -16.59 56,772 25.24 0.0623
2026-01-30 2025-12-31 13F MARATHON PETROLEUM COM 56585A102 278,734 98,651 54.78 45,331 30.60 0.1077
2025-10-31 2025-09-30 13F MARATHON PETROLEUM COM 56585A102 180,083 -12,651 -6.56 34,709 8.41 0.0762
2025-08-08 2025-06-30 13F MARATHON PETROLEUM COM 56585A102 192,734 -20,267 -9.51 32,015 3.17 0.0742
2025-05-09 2025-03-31 13F MARATHON PETROLEUM COM 56585A102 213,001 -208,081 -49.42 31,032 -47.17 0.0808
2025-02-12 2024-12-31 13F MARATHON PETROLEUM COM 56585A102 421,082 -14,227 -3.27 58,741 -17.17 0.1380
2024-11-12 2024-09-30 13F MARATHON PETROLEUM COM 56585A102 435,309 -47,889 -9.91 70,916 -15.40 0.1618
2024-08-08 2024-06-30 13F MARATHON PETROLEUM COM 56585A102 483,198 -23,281 -4.60 83,825 -18.51 0.1997
2024-05-10 2024-03-31 13F MARATHON PETROLEUM COM 56585A102 506,479 -11,527 -2.23 102,868 33.83 0.2357
2024-02-09 2023-12-31 13F MARATHON PETROLEUM COM 56585A102 518,006 100,302 24.01 76,865 21.59 0.1809
2023-11-09 2023-09-30 13F MARATHON PETROLEUM COM 56585A102 417,704 18,387 4.60 63,215 35.77 0.1582
2023-08-08 2023-06-30 13F MARATHON PETROLEUM COM 56585A102 399,317 28,353 7.64 46,560 -6.91 0.1077
2023-05-10 2023-03-31 13F MARATHON PETROLEUM COM 56585A102 370,964 7,697 2.12 50,017 18.30 0.1216
2023-02-10 2022-12-31 13F MARATHON PETROLEUM COM 56585A102 363,267 51,614 16.56 42,281 36.58 0.1103
2022-11-10 2022-09-30 13F MARATHON PETROLEUM COM 56585A102 311,653 -28,878 -8.48 30,956 10.58 0.0866
2022-08-09 2022-06-30 13F MARATHON PETROLEUM COM 56585A102 340,531 13,011 3.97 27,995 -0.03 0.0716
2022-05-12 2022-03-31 13F MARATHON PETROLEUM COM 56585A102 327,520 -19,403 -5.59 28,003 26.15 0.0639
2022-02-09 2021-12-31 13F Marathon Petroleum COM 56585A102 346,923 -29,645 -7.87 22,199 -4.62 0.0458
2021-11-12 2021-09-30 13F Marathon Petroleum COM 56585A102 376,568 -39,329 -9.46 23,275 -7.39 0.0503
2021-08-12 2021-06-30 13F Marathon Petroleum COM 56585A102 415,897 -50,726 -10.87 25,132 4.37 0.0531
2021-05-12 2021-03-31 13F Marathon Petroleum COM 56585A102 466,623 -157,627 -25.25 24,080 -6.74 0.0531
2021-02-12 2020-12-31 13F Marathon Petroleum COM 56585A102 624,250 -52,672 -7.78 25,819 30.00 0.0520
2020-11-12 2020-09-30 13F Marathon Petroleum COM 56585A102 676,922 -18,570 -2.67 19,861 -23.61 0.0447
2020-09-11 2020-06-30 13F/A-1 Marathon Petroleum COM 56585A102 695,492 -16,790 -2.36 25,998 54.53 0.0628
2020-08-13 2020-06-30 13F Marathon Petroleum COM 56585A102 573,123 -139,159 25,998 62,830.0174
2020-05-13 2020-03-31 13F Marathon Petroleum COM 56585A102 712,282 81,773 12.97 16,824 -55.71 0.0490
2020-02-14 2019-12-31 13F Marathon Petroleum COM 56585A102 630,509 31 0.00 37,989 -3.00 0.0907
2019-11-12 2019-09-30 13F Marathon Petroleum COM 56585A102 630,478 3,474 0.55 39,162 14.88 0.1002
2019-08-07 2019-06-30 13F MARATHON PETROLEUM COM 56585A102 627,004 15,720 2.57 34,090 -8.50 0.1161
2019-05-13 2019-03-31 13F MARATHON PETROLEUM COM 56585A102 611,284 5,827 0.96 37,258 4.28 0.1371
2019-02-12 2018-12-31 13F MARATHON PETROLEUM COM 56585A102 605,457 165,529 37.63 35,728 1.55 0.1486
2018-11-13 2018-09-30 13F MARATHON PETROLEUM COM 56585A102 439,928 -570,785 -56.47 35,181 -50.39 0.1249
2018-08-10 2018-06-30 13F MARATHON PETROLEUM COM 56585A102 1,010,713 -98,902 -8.91 70,912 -12.59 0.1207
2018-05-11 2018-03-31 13F MARATHON PETROLEUM COM 56585A102 1,109,615 -26,444 -2.33 81,124 8.23 0.1434
2018-02-09 2017-12-31 13F MARATHON PETROLEUM COM 56585A102 1,136,059 41,180 3.76 74,957 22.08 0.1304
2017-11-13 2017-09-30 13F MARATHON PETROLEUM COM 56585A102 1,094,879 -10,590 -0.96 61,401 6.14 0.1136
2017-08-08 2017-06-30 13F MARATHON PETROLEUM COM 56585A102 1,105,469 -13,843 -1.24 57,849 2.26 0.1118
2017-05-09 2017-03-31 13F MARATHON PETROLEUM COM 56585A102 1,119,312 12,792 1.16 56,570 1.54 0.1126
2017-02-10 2016-12-31 13F MARATHON PETROLEUM COM 56585A102 1,106,520 -53,414 -4.60 55,713 18.33 0.1168
2016-11-10 2016-09-30 13F MARATHON PETROLEUM COM 56585A102 1,159,934 2,788 0.24 47,082 7.19 0.0976
2016-08-12 2016-06-30 13F MARATHON PETROLEUM COM 56585A102 1,157,146 -11,830 -1.01 43,925 1.06 0.0964
2016-05-12 2016-03-31 13F MARATHON PETROLEUM COM 56585A102 1,168,976 102,650 9.63 43,463 -21.37 0.0976
2016-02-12 2015-12-31 13F MARATHON PETROLEUM COM 56585A102 1,066,326 -24,199 -2.22 55,278 9.41 0.1262
2015-11-17 2015-09-30 13F/A-1 MARATHON PETROLEUM COM 56585A102 1,090,525 1,890 0.17 50,524 -11.28 0.1232
2015-11-10 2015-09-30 13F MARATHON PETROLEUM COM 56585A102 1,090,525 50,524
2015-08-12 2015-06-30 13F MARATHON PETROLEUM COM 56585A102 1,088,635 544,860 100.20 56,946 2.28 0.1305
2015-05-08 2015-03-31 13F MARATHON PETROLEUM COM 56585A102 543,775 9,466 1.77 55,677 15.45 0.1291
2015-02-12 2014-12-31 13F MARATHON PETROLEUM COM 56585A102 534,309 -5,170 -0.96 48,227 5.58 0.1141
2014-11-12 2014-09-30 13F MARATHON PETROLEUM COM 56585A102 539,479 -33,055 -5.77 45,678 2.19 0.1112
2014-08-12 2014-06-30 13F MARATHON PETROLEUM COM 56585A102 572,534 -5,585 -0.97 44,698 -11.17 0.1031
2014-05-13 2014-03-31 13F MARATHON PETROLEUM COM 56585A102 578,119 -23,291 -3.87 50,319 -8.79 0.1222
2014-02-10 2013-12-31 13F MARATHON PETROLEUM COM 56585A102 601,410 -43,813 -6.79 55,167 32.93 0.1360
2013-11-12 2013-09-30 13F MARATHON PETROLEUM COM 56585A102 645,223 2,778 0.43 41,501 -9.09 0.1107
2013-08-12 2013-06-30 13F MARATHON PETROLEUM COM 56585A102 642,445 642,445 45,652 0.1285
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.