Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAssenagon Asset Management S.A.
Latest Disclosed Ownership121,200 shares
Latest Disclosed Value $ 29,594,616
Assenagon Asset Management S.A. reports 62.18% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 20, 2026 - Assenagon Asset Management S.A. filed a 13F-HR form disclosing ownership of 121,200 shares of Marathon Petroleum Corporation (MX:MPC) valued at $29,594,616 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 320,499 shares of Marathon Petroleum Corporation. This represents a change in shares of -62.18% 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)
2026-04-20 2026-03-31 13F MARATHON PETE COM 56585A102 121,200 -199,299 -62.18 29,595 -43.22 0.0449
2026-01-09 2025-12-31 13F MARATHON PETE COM 56585A102 320,499 246,384 332.43 52,123 264.90 0.0718
2025-10-07 2025-09-30 13F MARATHON PETE COM 56585A102 74,115 66,288 846.91 14,285 998.77 0.0195
2025-07-11 2025-06-30 13F MARATHON PETE COM 56585A102 7,827 -470,485 -98.36 1,300 -98.13 0.0019
2025-04-15 2025-03-31 13F MARATHON PETE COM 56585A102 478,312 -64,750 -11.92 69,685 -8.02 0.1162
2025-01-14 2024-12-31 13F MARATHON PETE COM 56585A102 543,062 501,441 1,204.78 75,757 1,017.36 0.1222
2024-10-23 2024-09-30 13F MARATHON PETE COM 56585A102 41,621 -643,097 -93.92 6,780 -94.29 0.0125
2024-07-18 2024-06-30 13F MARATHON PETE COM 56585A102 684,718 621,336 980.30 118,785 830.11 0.2644
2024-04-24 2024-03-31 13F MARATHON PETE COM 56585A102 63,382 -821,191 -92.83 12,771 -90.27 0.0302
2024-01-17 2023-12-31 13F MARATHON PETE COM 56585A102 884,573 636,281 256.26 131,235 249.25 0.3483
2023-11-06 2023-09-30 13F MARATHON PETE COM 56585A102 248,292 -104,365 -29.59 37,577 -8.62 0.1163
2023-07-25 2023-06-30 13F MARATHON PETE COM 56585A102 352,657 -1,200,332 -77.29 41,120 -80.36 0.1423
2023-04-18 2023-03-31 13F MARATHON PETE COM 56585A102 1,552,989 266,914 20.75 209,390 140,429.53 0.7432
2023-01-12 2022-12-31 13F MARATHON PETE COM 56585A102 1,286,075 -354,546 -21.61 150 -99.91 0.5399
2022-10-27 2022-09-30 13F MARATHON PETE COM 56585A102 1,640,621 417,241 34.11 162,963 62.03 0.6255
2022-07-27 2022-06-30 13F MARATHON PETE COM 56585A102 1,223,380 1,216,638 18,045.65 100,574 17,360.76 0.3728
2022-04-25 2022-03-31 13F MARATHON PETE COM 56585A102 6,742 -143 -2.08 576 30.61 0.0016
2022-02-01 2021-12-31 13F MARATHON PETE COM 56585A102 6,885 259 3.91 441 7.56 0.0013
2021-10-19 2021-09-30 13F MARATHON PETE COM 56585A102 6,626 6,626 410 0.0013
2020-01-17 2019-12-31 13F MARATHON PETE COM 56585A102 0 -47,475 -100.00 0 -100.00
2019-10-16 2019-09-30 13F MARATHON PETE COM 56585A102 47,475 -96,668 -67.06 2,884 -64.20 0.0193
2019-08-12 2019-06-30 13F MARATHON PETE COM 56585A102 144,143 -58,444 -28.85 8,055 -33.57 0.0605
2019-04-26 2019-03-31 13F MARATHON PETE COM 56585A102 202,587 14,117 7.49 12,125 9.02 0.1138
2019-01-23 2018-12-31 13F MARATHON PETE COM 56585A102 188,470 188,470 11,122 0.1260
2018-07-17 2018-06-30 13F MARATHON PETE COM 56585A102 0 -273,217 -100.00 0 -100.00
2018-04-30 2018-03-31 13F MARATHON PETE COM 56585A102 273,217 273,217 19,975 0.2602
2018-01-25 2017-12-31 13F MARATHON PETE COM 56585A102 0 -274,072 -100.00 0 -100.00
2017-10-18 2017-09-30 13F MARATHON PETE COM 56585A102 274,072 274,072 15,370 0.1427
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.