Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionCambria Investment Management, L.P.
Latest Disclosed Ownership37,660 shares
Latest Disclosed Value $ 9,195,819
Cambria Investment Management, L.P. reports 19.76% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 14, 2026 - Cambria Investment Management, L.P. filed a 13F-HR form disclosing ownership of 37,660 shares of Marathon Petroleum Corporation (MX:MPC) valued at $9,195,819 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 46,933 shares of Marathon Petroleum Corporation. This represents a change in shares of -19.76% 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)
2026-05-14 2026-03-31 13F MARATHON PETE COM 56585A102 37,660 -9,273 -19.76 9,196 20.48 0.4436
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 46,933 -5,103 -9.81 7,633 -23.90 0.4455
2025-12-01 2025-09-30 13F/A-1 MARATHON PETE COM 56585A102 52,036 -3,577 -6.43 10,029 8.57 0.6088
2025-11-12 2025-09-30 13F MARATHON PETE COM 56585A102 55,613 0 9,238 0.4773
2025-08-13 2025-06-30 13F MARATHON PETE COM 56585A102 55,613 -5,818 -9.47 9,238 3.22 0.6224
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 61,431 -6,105 -9.04 8,950 -5.01 0.6240
2025-02-14 2024-12-31 13F MARATHON PETE COM 56585A102 67,536 5,020 8.03 9,421 -7.49 0.5731
2024-11-14 2024-09-30 13F MARATHON PETE COM 56585A102 62,516 -3,534 -5.35 10,184 -11.12 0.6118
2024-08-14 2024-06-30 13F MARATHON PETE COM 56585A102 66,050 1,032 1.59 11,458 -12.54 0.7003
2024-05-14 2024-03-31 13F MARATHON PETE COM 56585A102 65,018 -21,682 -25.01 13,101 1.86 0.7835
2024-02-13 2023-12-31 13F MARATHON PETE COM 56585A102 86,700 8,456 10.81 12,863 8.62 0.8953
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 78,244 5,096 6.97 11,841 38.83 0.9610
2023-08-10 2023-06-30 13F MARATHON PETE COM 56585A102 73,148 -3,308 -4.33 8,529 -17.26 0.7095
2023-05-11 2023-03-31 13F MARATHON PETE COM 56585A102 76,456 2,273 3.06 10,309 19.39 0.8515
2023-02-13 2022-12-31 13F MARATHON PETE COM 56585A102 74,183 13,936 23.13 8,634 44.26 0.7239
2022-11-08 2022-09-30 13F MARATHON PETE COM 56585A102 60,247 60,247 5,985 0.6467
2019-08-12 2019-06-30 13F MARATHON PETE COM 56585A102 0 -3,905 -100.00 0 -100.00
2019-05-08 2019-03-31 13F MARATHON PETE COM 56585A102 3,905 -1,344 -25.60 234 -24.52 0.0362
2019-02-13 2018-12-31 13F MARATHON PETE COM 56585A102 5,249 -17,037 -76.45 310 -82.60 0.0526
2018-11-14 2018-09-30 13F/A-1 MARATHON PETE COM 56585A102 22,286 318 1.45 1,782 15.64 0.2612
2018-11-09 2018-09-30 13F MARATHON PETE COM 56585A102 21,968 0 1,541 0.2283
2018-07-30 2018-06-30 13F MARATHON PETE COM 56585A102 21,968 21,968 1,541 0.2283
2016-11-14 2016-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 0 -27,234 -100.00 0 -100.00
2016-08-15 2016-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 27,234 -3,722 -12.02 1,034 -10.17 0.4771
2016-05-16 2016-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 30,956 -2,092 -6.33 1,151 -32.81 0.5328
2016-02-11 2015-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 33,048 -2,626 -7.36 1,713 3.69 0.6866
2015-11-02 2015-09-30 13F MARATHON PETROLEUM Common Stock 56585A102 35,674 -8,390 -19.04 1,652 -28.33 0.6358
2015-11-02 2015-06-30 13F MARATHON PETROLEUM Common Stock 56585A102 44,064 22,185 101.40 2,305 2.90 0.7048
2015-11-02 2015-03-31 13F MARATHON PETROLEUM Common Stock 56585A102 21,879 1,071 5.15 2,240 19.28 0.2539
2015-11-02 2014-12-31 13F MARATHON PETROLEUM Common Stock 56585A102 20,808 20,808 1,878 0.6701
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.