Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionKwmg, Llc
Latest Disclosed Ownership41,735 shares
Latest Disclosed Value $ 10,190,813
Kwmg, Llc reports 1.46% increase in ownership of MPC / Marathon Petroleum Corporation

On April 9, 2026 - Kwmg, Llc filed a 13F-HR form disclosing ownership of 41,735 shares of Marathon Petroleum Corporation (US:MPC) valued at $10,190,852 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 41,135 shares of Marathon Petroleum Corporation. This represents a change in shares of 1.46% during the quarter. The current value of the position is $11,152,009 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)
2026-04-09 2026-03-31 13F MARATHON PETE COM 56585A102 41,735 600 1.46 10,191 52.34 0.8508
2026-01-16 2025-12-31 13F MARATHON PETE COM 56585A102 41,135 -349 -0.84 6,690 -16.34 0.5767
2025-10-08 2025-09-30 13F MARATHON PETE COM 56585A102 41,484 712 1.75 7,996 18.06 0.7005
2025-07-15 2025-06-30 13F MARATHON PETE COM 56585A102 40,772 1,807 4.64 6,773 19.31 0.6361
2025-04-09 2025-03-31 13F MARATHON PETE COM 56585A102 38,965 737 1.93 5,677 6.45 0.5777
2025-01-13 2024-12-31 13F MARATHON PETE COM 56585A102 38,228 1,714 4.69 5,333 -10.36 0.5492
2024-10-07 2024-09-30 13F MARATHON PETE COM 56585A102 36,514 -273 -0.74 5,949 -6.79 0.5984
2024-07-12 2024-06-30 13F MARATHON PETE COM 56585A102 36,787 -4,858 -11.67 6,382 -23.95 0.6881
2024-04-15 2024-03-31 13F MARATHON PETE COM 56585A102 41,645 -1,248 -2.91 8,392 31.87 0.9181
2024-01-11 2023-12-31 13F MARATHON PETE COM 56585A102 42,893 -3,025 -6.59 6,364 -8.43 0.7453
2023-10-10 2023-09-30 13F MARATHON PETE COM 56585A102 45,918 -1,636 -3.44 6,949 25.34 0.8741
2023-07-10 2023-06-30 13F MARATHON PETE COM 56585A102 47,554 1,204 2.60 5,545 -11.28 0.6866
2023-04-06 2023-03-31 13F MARATHON PETE COM 56585A102 46,350 -712 -1.51 6,249 14.10 0.8435
2023-01-10 2022-12-31 13F MARATHON PETE COM 56585A102 47,062 -4,685 -9.05 5,478 6.56 0.7779
2022-10-26 2022-09-30 13F MARATHON PETE COM 56585A102 51,747 -195 -0.38 5,140 20.37 0.7905
2022-07-12 2022-06-30 13F MARATHON PETE COM 56585A102 51,942 -5,169 -9.05 4,270 -12.55 0.6431
2022-04-25 2022-03-31 13F/A-1 MARATHON PETE COM 56585A102 57,111 -5,059 -8.14 4,883 22.75 0.6696
2022-04-19 2022-03-31 13F MARATHON PETE COM 56585A102 57,111 -5,059 4,883 0.6628
2022-01-20 2021-12-31 13F MARATHON PETE COM 56585A102 62,170 1,702 2.81 3,978 6.42 0.5381
2021-10-07 2021-09-30 13F MARATHON PETE COM 56585A102 60,468 2,718 4.71 3,738 12.66 0.5454
2021-07-13 2021-06-30 13F MARATHON PETE COM 56585A102 57,750 1,539 2.74 3,318 10.34 0.4976
2021-04-12 2021-03-31 13F MARATHON PETE COM 56585A102 56,211 1,325 2.41 3,007 32.47 0.4794
2021-01-25 2020-12-31 13F MARATHON PETE COM 56585A102 54,886 2,054 3.89 2,270 46.45 0.4058
2020-10-07 2020-09-30 13F MARATHON PETE COM 56585A102 52,832 3,169 6.38 1,550 -16.49 0.3135
2020-07-27 2020-06-30 13F MARATHON PETE COM 56585A102 49,663 8,170 19.69 1,856 89.39 0.4014
2020-04-13 2020-03-31 13F MARATHON PETE COM 56585A102 41,493 1,768 4.45 980 -59.05 0.2620
2020-01-10 2019-12-31 13F MARATHON PETE COM 56585A102 39,725 119 0.30 2,393 -0.54 0.5250
2019-10-22 2019-09-30 13F MARATHON PETE COM 56585A102 39,606 1,454 3.81 2,406 12.85 0.5777
2019-07-10 2019-06-30 13F MARATHON PETE COM 56585A102 38,152 2,847 8.06 2,132 0.90 0.5135
2019-04-23 2019-03-31 13F MARATHON PETE COM 56585A102 35,305 2,550 7.79 2,113 9.31 0.5240
2019-02-12 2018-12-31 13F MARATHON PETE COM 56585A102 32,755 4,259 14.95 1,933 -15.18 0.5288
2018-11-14 2018-09-30 13F MARATHON PETE COM 56585A102 28,496 -166 -0.58 2,279 13.33 0.5827
2018-08-09 2018-06-30 13F MARATHON PETE COM 56585A102 28,662 23,608 467.12 2,011 443.51 0.5502
2018-04-20 2018-03-31 13F MARATHON PETE COM 56585A102 5,054 5,054 370 0.1089
2017-07-25 2017-06-30 13F MARATHON PETE COM 56585A102 0 -25,179 -100.00 0 -100.00
2017-05-10 2017-03-31 13F MARATHON PETE COM 56585A102 25,179 272 1.09 1,273 1.52 0.4914
2017-02-13 2016-12-31 13F MARATHON PETE COM 56585A102 24,907 3,024 13.82 1,254 41.22 0.5454
2016-10-24 2016-09-30 13F MARATHON PETE COM 56585A102 21,883 2,408 12.36 888 20.16 0.4315
2016-07-21 2016-06-30 13F MARATHON PETE COM 56585A102 19,475 1,582 8.84 739 11.13 0.3996
2016-05-11 2016-03-31 13F MARATHON PETE COM 56585A102 17,893 2,983 20.01 665 -13.97 0.3913
2016-01-22 2015-12-31 13F MARATHON PETE COM 56585A102 14,910 1,538 11.50 773 24.68 0.5222
2015-10-26 2015-09-30 13F MARATHON PETE COM 56585A102 13,372 649 5.10 620 -6.91 0.4670
2015-08-11 2015-06-30 13F MARATHON PETE COM 56585A102 12,723 7,226 131.45 666 15.42 0.4876
2015-05-13 2015-03-31 13F MARATHON PETE COM 56585A102 5,497 5,497 577 0.4607
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.