Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionJohnson Financial Group, Inc.
Latest Disclosed Ownership561 shares
Latest Disclosed Value $ 136,986
Johnson Financial Group, Inc. reports 21.97% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 7, 2026 - Johnson Financial Group, Inc. filed a 13F-HR form disclosing ownership of 561 shares of Marathon Petroleum Corporation (US:MPC) valued at $136,985 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 719 shares of Marathon Petroleum Corporation. This represents a change in shares of -21.97% during the quarter. The current value of the position is $149,905 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.

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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)
2026-05-07 2026-03-31 13F MARATHON PETE COM 56585A102 561 -158 -21.97 137 17.24 0.0036
2026-02-12 2025-12-31 13F MARATHON PETE COM 56585A102 719 382 113.35 117 81.25 0.0044
2025-11-13 2025-09-30 13F MARATHON PETE COM 56585A102 337 -3,157 -90.35 65 -88.97 0.0024
2025-08-13 2025-06-30 13F MARATHON PETE COM 56585A102 3,494 -554 -13.69 580 -1.53 0.0261
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 4,048 534 15.20 590 15.04 0.0289
2025-02-14 2024-12-31 13F MARATHON PETE COM 56585A102 3,514 -384 -9.85 512 -19.37 0.0242
2024-11-13 2024-09-30 13F MARATHON PETE COM 56585A102 3,898 154 4.11 635 -2.16 0.0290
2024-08-14 2024-06-30 13F MARATHON PETE COM 56585A102 3,744 -2,414 -39.20 650 -47.66 0.0315
2024-05-14 2024-03-31 13F MARATHON PETE COM 56585A102 6,158 81 1.33 1,241 37.62 0.0668
2024-02-09 2023-12-31 13F/A-1 MARATHON PETE COM 56585A102 6,077 6,077 902 0.0493
2024-02-09 2023-12-31 13F MARATHON PETE COM 56585A102 6,077 6,077 902 0.0297
2023-05-12 2023-03-31 13F MARATHON PETE COM 56585A102 0 -319 -100.00 0 -100.00
2023-02-13 2022-12-31 13F MARATHON PETE COM 56585A102 319 0 0.00 37 8.82 0.0029
2022-11-14 2022-09-30 13F MARATHON PETE COM 56585A102 319 5 1.59 34 30.77 0.0031
2022-08-15 2022-06-30 13F MARATHON PETE COM 56585A102 314 0 0.00 26 -3.70 0.0019
2022-05-16 2022-03-31 13F MARATHON PETE COM 56585A102 314 -324 -50.78 27 -34.15 0.0019
2022-02-14 2021-12-31 13F MARATHON PETE COM 56585A102 638 0 0.00 41 5.13 0.0026
2021-11-12 2021-09-30 13F MARATHON PETE COM 56585A102 638 -800 -55.63 39 -55.17 0.0027
2021-08-13 2021-06-30 13F MARATHON PETE COM 56585A102 1,438 800 125.39 87 155.88 0.0057
2021-05-14 2021-03-31 13F MARATHON PETE COM 56585A102 638 0 0.00 34 30.77 0.0023
2021-02-12 2020-12-31 13F MARATHON PETROLEUM COM 56585A102 638 324 103.18 26 188.89 0.0022
2020-11-12 2020-09-30 13F MARATHON PETROLEUM COM 56585A102 314 -120 -27.65 9 -43.75 0.0009
2020-08-11 2020-06-30 13F MARATHON PETROLEUM COM 56585A102 434 -251 -36.64 16 0.00 0.0017
2020-05-14 2020-03-31 13F MARATHON PETROLEUM COM 56585A102 685 -1,122 -62.09 16 -85.32 0.0019
2020-02-14 2019-12-31 13F MARATHON PETROLEUM COM 56585A102 1,807 -342 -15.91 109 -16.79 0.0098
2019-11-12 2019-09-30 13F MARATHON PETROLEUM COM 56585A102 2,149 237 12.40 131 22.43 0.0120
2019-08-09 2019-06-30 13F MARATHON PETROLEUM COM 56585A102 1,912 1,080 129.81 107 114.00 0.0095
2019-05-13 2019-03-31 13F MARATHON PETROLEUM COM 56585A102 832 -182 -17.95 50 -16.67 0.0044
2019-02-11 2018-12-31 13F MARATHON PETROLEUM COM 56585A102 1,014 -123 -10.82 60 -34.07 0.0062
2018-11-09 2018-09-30 13F MARATHON PETROLEUM COM 56585A102 1,137 112 10.93 91 26.39 0.0093
2018-08-07 2018-06-30 13F MARATHON PETROLEUM COM 56585A102 1,025 -112 -9.85 72 -13.25 0.0079
2018-05-07 2018-03-31 13F MARATHON PETROLEUM COM 56585A102 1,137 112 10.93 83 22.06 0.0099
2018-02-12 2017-12-31 13F MARATHON PETROLEUM COM 56585A102 1,025 -120 -10.48 68 6.25 0.0083
2017-11-09 2017-09-30 13F MARATHON PETROLEUM COM 56585A102 1,145 -622 -35.20 64 -30.43 0.0084
2017-08-10 2017-06-30 13F MARATHON PETROLEUM COM 56585A102 1,767 -412 -18.91 92 -16.36 0.0132
2017-05-12 2017-03-31 13F MARATHON PETROLEUM COM 56585A102 2,179 -640 -22.70 110 -22.54 0.0138
2017-02-07 2016-12-31 13F/A-1 MARATHON PETROLEUM COM 56585A102 2,819 -1,240 -30.55 142 -13.94 0.0196
2017-02-02 2016-12-31 13F MARATHON PETROLEUM COM 56585A102 2,819 142
2016-11-14 2016-09-30 13F MARATHON PETROLEUM COM 56585A102 4,059 -10,818 -72.72 165 -70.80 0.0220
2016-08-12 2016-06-30 13F MARATHON PETROLEUM COM 56585A102 14,877 7,056 90.22 565 94.16 0.0782
2016-05-09 2016-03-31 13F MARATHON PETROLEUM COM 56585A102 7,821 -2,050 -20.77 291 -43.05 0.0582
2016-02-08 2015-12-31 13F MARATHON PETROLEUM COM 56585A102 9,871 539 5.78 511 18.29 0.1062
2015-11-02 2015-09-30 13F MARATHON PETROLEUM COM 56585A102 9,332 962 11.49 432 -1.37 0.0946
2015-08-11 2015-06-30 13F MARATHON PETROLEUM COM 56585A102 8,370 4,720 129.32 438 17.11 0.0908
2015-05-12 2015-03-31 13F MARATHON PETROLEUM COM 56585A102 3,650 -255 -6.53 374 6.25 0.0803
2015-02-10 2014-12-31 13F MARATHON PETROLEUM COM 56585A102 3,905 730 22.99 352 30.86 0.0817
2014-11-14 2014-09-30 13F MARATHON PETROLEUM COM 56585A102 3,175 211 7.12 269 16.45 0.0701
2014-08-06 2014-06-30 13F MARATHON PETE COM 56585A102 2,964 -119 -3.86 231 -13.81 0.0609
2014-05-14 2014-03-31 13F MARATHON PETE COM 56585A102 3,083 6 0.19 268 -4.96 0.0783
2014-02-11 2013-12-31 13F MARATHON PETE COM 56585A102 3,077 34 1.12 282 43.88 0.0816
2013-11-14 2013-09-30 13F MARATHON PETE COM 56585A102 3,043 337 12.45 196 2.08 0.0595
2013-08-14 2013-06-30 13F MARATHON PETE COM 56585A102 2,706 2,706 192 0.0534
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.