Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionChevy Chase Trust Holdings, Inc.
Latest Disclosed Ownership149,672 shares
Latest Disclosed Value $ 36,546,909
Chevy Chase Trust Holdings, Inc. reports 4.73% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 15, 2026 - Chevy Chase Trust Holdings, Inc. filed a 13F-HR form disclosing ownership of 149,672 shares of Marathon Petroleum Corporation (MX:MPC) valued at $36,546,909 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 157,100 shares of Marathon Petroleum Corporation. This represents a change in shares of -4.73% 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 149,672 -7,428 -4.73 36,547 43.04 0.0764
2026-02-13 2025-12-31 13F MARATHON PETE COM 56585A102 157,100 -2,067 -1.30 25,549 -16.72 0.0690
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 159,167 -7,079 -4.26 30,678 11.09 0.0844
2025-07-29 2025-06-30 13F MARATHON PETE COM 56585A102 166,246 -3,553 -2.09 27,615 11.63 0.0803
2025-04-23 2025-03-31 13F MARATHON PETE COM 56585A102 169,799 -2,960 -1.71 24,738 2.65 0.0791
2025-01-30 2024-12-31 13F MARATHON PETE COM 56585A102 172,759 -10,853 -5.91 24,100 -19.43 0.0734
2024-11-14 2024-09-30 13F MARATHON PETE COM 56585A102 183,612 -12,710 -6.47 29,912 -12.17 0.0917
2024-07-22 2024-06-30 13F MARATHON PETE COM 56585A102 196,322 -11,469 -5.52 34,058 -18.66 0.1087
2024-05-03 2024-03-31 13F MARATHON PETE COM 56585A102 207,791 -7,871 -3.65 41,870 30.86 0.1370
2024-01-24 2023-12-31 13F MARATHON PETE COM 56585A102 215,662 -12,651 -5.54 31,996 -7.40 0.1145
2023-10-23 2023-09-30 13F MARATHON PETE COM 56585A102 228,313 -19,377 -7.82 34,553 19.64 0.1365
2023-07-25 2023-06-30 13F MARATHON PETE COM 56585A102 247,690 -19,961 -7.46 28,881 -19.97 0.1082
2023-05-17 2023-03-31 13F/A-1 MARATHON PETE COM 56585A102 267,651 -5,795 -2.12 36,087 13.39 0.1428
2023-05-16 2023-03-31 13F MARATHON PETE COM 56585A102 8,120 -265,326 1,095 0.1495
2023-02-09 2022-12-31 13F MARATHON PETE COM 56585A102 273,446 -34,788 -11.29 31,826 3.95 0.1353
2022-11-04 2022-09-30 13F MARATHON PETE COM 56585A102 308,234 -22,241 -6.73 30,616 12.70 0.1307
2022-08-10 2022-06-30 13F MARATHON PETE COM 56585A102 330,475 -22,412 -6.35 27,167 -9.96 0.1123
2022-04-27 2022-03-31 13F MARATHON PETE COM 56585A102 352,887 -20,594 -5.51 30,172 26.25 0.1040
2022-01-31 2021-12-31 13F MARATHON PETE COM 56585A102 373,481 -22,667 -5.72 23,899 -2.40 0.0770
2021-10-20 2021-09-30 13F MARATHON PETE COM 56585A102 396,148 -14,009 -3.42 24,487 -1.19 0.0853
2021-07-20 2021-06-30 13F MARATHON PETE COM 56585A102 410,157 -31,241 -7.08 24,782 4.96 0.0843
2021-04-22 2021-03-31 13F MARATHON PETE COM 56585A102 441,398 -32,616 -6.88 23,611 20.43 0.0842
2021-02-12 2020-12-31 13F MARATHON PETE COM 56585A102 474,014 -15,149 -3.10 19,606 36.61 0.0699
2020-11-06 2020-09-30 13F MARATHON PETE COM 56585A102 489,163 -44,864 -8.40 14,352 -28.10 0.0567
2020-08-14 2020-06-30 13F MARATHON PETE COM 56585A102 534,027 -27,992 -4.98 19,961 50.37 0.0809
2020-05-13 2020-03-31 13F MARATHON PETE COM 56585A102 562,019 8,694 1.57 13,275 -60.18 0.0618
2020-02-12 2019-12-31 13F MARATHON PETROLEUM COM 56585A102 553,325 -7,069 -1.26 33,337 -2.08 0.1261
2019-11-20 2019-09-30 13F MARATHON PETE COM 56585A102 560,394 -383 -0.07 34,045 8.65 0.1396
2019-08-14 2019-06-30 13F MARATHON PETE COM 56585A102 560,777 -9,480 -1.66 31,336 -9.69 0.1299
2019-05-13 2019-03-31 13F MARATHON PETE COM 56585A102 570,257 -6,578 -1.14 34,699 1.94 0.1435
2019-02-14 2018-12-31 13F MARATHON PETE COM 56585A102 576,835 196,735 51.76 34,040 11.99 0.1660
2018-10-23 2018-09-30 13F MARATHON PETE COM 56585A102 380,100 -18,311 -4.60 30,396 8.74 0.1260
2018-08-02 2018-06-30 13F MARATHON PETE COM 56585A102 398,411 -9,838 -2.41 27,953 -6.35 0.1211
2018-04-10 2018-03-31 13F MARATHON PETE COM 56585A102 408,249 -22,281 -5.18 29,847 5.07 0.1326
2018-01-22 2017-12-31 13F MARATHON PETE COM 56585A102 430,530 -18,439 -4.11 28,406 12.82 0.1223
2017-11-14 2017-09-30 13F MARATHON PETE COM 56585A102 448,969 -4,227 -0.93 25,178 6.16 0.1141
2017-07-13 2017-06-30 13F MARATHON PETE COM 56585A102 453,196 -7,677 -1.67 23,716 1.82 0.1135
2017-04-05 2017-03-31 13F MARATHON PETE COM 56585A102 460,873 13,175 2.94 23,293 3.33 0.1143
2017-01-09 2016-12-31 13F MARATHON PETE COM 56585A102 447,698 -448 -0.10 22,542 23.92 0.1195
2016-10-05 2016-09-30 13F MARATHON PETE COM 56585A102 448,146 -11,809 -2.57 18,191 4.19 0.0996
2016-07-08 2016-06-30 13F MARATHON PETE COM 56585A102 459,955 4,293 0.94 17,459 3.05 0.0973
2016-04-07 2016-03-31 13F MARATHON PETE COM 56585A102 455,662 6,839 1.52 16,942 -27.18 0.0969
2016-01-15 2015-12-31 13F MARATHON PETE COM 56585A102 448,823 -280 -0.06 23,267 11.82 0.1365
2015-10-15 2015-09-30 13F MARATHON PETE COM 56585A102 449,103 9,860 2.24 20,808 -9.44 0.1299
2015-07-15 2015-06-30 13F MARATHON PETE COM 56585A102 439,243 220,487 100.79 22,977 2.59 0.1376
2015-04-17 2015-03-31 13F/A-1 MARATHON PETE COM 56585A102 218,756 -3,187 -1.44 22,398 11.81 0.1351
2015-04-15 2015-03-31 13F MARATHON PETE COM 56585A102 218,756 22,398
2015-01-15 2014-12-31 13F MARATHON PETE COM 56585A102 221,943 -4,535 -2.00 20,032 4.46 0.1252
2014-10-17 2014-09-30 13F MARATHON PETE COM 56585A102 226,478 15,021 7.10 19,176 16.15 0.1241
2014-07-16 2014-06-30 13F MARATHON PETE COM 56585A102 211,457 -8,544 -3.88 16,509 -13.79 0.1148
2014-04-15 2014-03-31 13F MARATHON PETE COM 56585A102 220,001 -5,170 -2.30 19,149 -7.29 0.1373
2014-01-23 2013-12-31 13F MARATHON PETE COM 56585A102 225,171 -5,947 -2.57 20,655 38.95 0.1509
2013-10-15 2013-09-30 13F MARATHON PETE COM 56585A102 231,118 -2,549 -1.09 14,865 -10.47 0.1213
2013-07-18 2013-06-30 13F/A-2 MARATHON PETE COM 56585A102 233,667 233,667 16,604 0.1453
2013-07-18 2013-06-30 13F/A-1 MARATHON PETE COM 56585A102 6,040 -227,627 429 0.0927
2013-07-17 2013-06-30 13F MARATHON PETE COM 56585A102 6,040 429
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.