Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionWhittier Trust Co
Latest Disclosed Ownership7,215 shares
Latest Disclosed Value $ 1,741,701
Whittier Trust Co reports 8.56% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 28, 2026 - Whittier Trust Co filed a 13F-HR form disclosing ownership of 7,215 shares of Marathon Petroleum Corporation (US:MPC) valued at $1,761,759 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 7,890 shares of Marathon Petroleum Corporation. This represents a change in shares of -8.56% during the quarter. The current value of the position is $1,927,920 USD.

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)
2026-04-28 2026-03-31 13F MARATHON PETE common 56585A102 7,215 -675 -8.56 1,742 29.54 0.0197
2026-01-26 2025-12-31 13F MARATHON PETE common 56585A102 7,890 -55 -0.69 1,345 -12.39 0.0146
2025-10-31 2025-09-30 13F MARATHON PETE common 56585A102 7,945 -1,329 -14.33 1,534 -0.39 0.0175
2025-07-30 2025-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,274 1,150 14.16 1,541 30.18 0.0186
2025-05-02 2025-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,124 -525 -6.07 1,184 -1.91 0.0165
2025-02-11 2024-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,649 141 1.66 1,207 -12.99 0.0159
2024-10-21 2024-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,508 -293 -3.33 1,386 -9.17 0.0185
2024-07-29 2024-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,801 -124 -1.39 1,527 -15.13 0.0217
2024-05-02 2024-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,925 0 0.00 1,798 35.80 0.0262
2024-01-11 2023-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,925 537 6.40 1,324 4.33 0.0215
2023-10-27 2023-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,388 196 2.39 1,269 32.88 0.0226
2023-07-24 2023-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,192 -308 -3.62 955 -16.67 0.0166
2023-04-21 2023-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,500 0 0.00 1,146 15.87 0.0209
2023-01-25 2022-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,500 -516 -5.72 989 10.38 0.0192
2022-10-21 2022-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,016 -74 -0.81 896 19.95 0.0188
2022-07-28 2022-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,090 -375 -3.96 747 -7.66 0.0151
2022-04-29 2022-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,465 19 0.20 809 33.94 0.0136
2022-01-19 2021-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,446 4 0.04 604 3.42 0.0098
2021-11-01 2021-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,442 375 4.14 584 6.57 0.0106
2021-07-29 2021-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,067 -354 -3.76 548 8.73 0.0098
2021-04-26 2021-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,421 963 11.39 504 44.00 0.0098
2021-01-29 2020-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,458 0 0.00 350 41.13 0.0075
2020-10-30 2020-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,458 -89 -1.04 248 -22.26 0.0059
2020-07-10 2020-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,547 0 0.00 319 57.92 0.0089
2020-04-27 2020-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,547 -911 -9.63 202 -64.56 0.0066
2020-01-31 2019-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 9,458 1,016 12.04 570 11.11 0.0150
2019-10-18 2019-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 8,442 3,538 72.15 513 87.23 0.0147
2019-07-23 2019-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 -8 -0.16 274 -6.80 0.0080
2019-04-29 2019-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,912 8 0.16 294 1.73 0.0090
2019-02-07 2018-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 0 0.00 289 -26.28 0.0099
2018-10-23 2018-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 0 0.00 392 13.95 0.0122
2018-07-27 2018-06-30 13F/A-1 MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 0 0.00 344 -4.18 0.0114
2018-05-01 2018-03-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 0 0.00 359 10.80 0.0121
2018-02-07 2017-12-31 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 0 0.00 324 17.82 0.0113
2017-10-23 2017-09-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 0 0.00 275 7.00 0.0100
2017-07-20 2017-06-30 13F MARATHON PETE CORP COM US LARGE-CAP EQUITIES 56585A102 4,904 -1,421 -22.47 257 -19.69 0.0099
2017-04-26 2017-03-31 13F MARATHON PETE US LARGE CAP EQUITIES 56585A102 6,325 1,625 34.57 320 35.02 0.0129
2017-01-18 2016-12-31 13F MARATHON PETE CORP COM US LARGE CAP EQUITIES 56585A102 4,700 0 0.00 237 24.08 0.0101
2016-11-10 2016-09-30 13F MARATHON PETE CORP COM US LARGE CAP EQUITIES 56585A102 4,700 0 0.00 191 7.30 0.0083
2016-07-28 2016-06-30 13F MARATHON PETE CORP COM US LARGE CAP EQUITIES 56585A102 4,700 0 0.00 178 1.71 0.0078
2016-04-28 2016-03-31 13F MARATHON PETE CORP COM US LARGE CAP EQUITIES 56585A102 4,700 0 0.00 175 -28.28 0.0077
2016-02-10 2015-12-31 13F MARATHON PETE CORP COM US LARGE CAP EQUITIES 56585A102 4,700 0 0.00 244 11.93 0.0111
2015-11-12 2015-09-30 13F MARATHON PETE CORP COM US LARGE CAP EQUITIES 56585A102 4,700 0 0.00 218 -11.38 0.0106
2015-08-13 2015-06-30 13F MARATHON PETE CORP COM US LARGE CAP EQUITIES 56585A102 4,700 3,700 370.00 246 284.38 0.0109
2013-11-18 2013-09-30 13F MARATHON PETE COM 56585A102 1,000 0 0.00 64 -9.86 0.0035
2013-08-14 2013-06-30 13F MARATHON PETE COM 56585A102 1,000 1,000 71 0.0040
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.