Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionCHICAGO TRUST Co NA
Latest Disclosed Ownership1,933 shares
Latest Disclosed Value $ 471,999
CHICAGO TRUST Co NA reports 13.40% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 24, 2026 - CHICAGO TRUST Co NA filed a 13F-HR form disclosing ownership of 1,933 shares of Marathon Petroleum Corporation (MX:MPC) valued at $471,999 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,232 shares of Marathon Petroleum Corporation. This represents a change in shares of -13.40% 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)
2026-04-24 2026-03-31 13F MARATHON PETE COM 56585A102 1,933 -299 -13.40 472 30.11 0.0471
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 0 -100.00 0
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 2,232 11 0.50 363 -15.42 0.0360
2025-10-10 2025-09-30 13F MARATHON PETE COM 56585A102 2,221 537 31.89 428 53.41 0.0594
2025-07-14 2025-06-30 13F MARATHON PETE COM 56585A102 1,684 63 3.89 280 18.22 0.0393
2025-04-14 2025-03-31 13F MARATHON PETE COM 56585A102 1,621 -85 -4.98 236 -0.42 0.0419
2025-01-13 2024-12-31 13F MARATHON PETE COM 56585A102 1,706 0 0.00 238 -14.44 0.0421
2024-10-10 2024-09-30 13F MARATHON PETE COM 56585A102 1,706 1,706 278 0.0479
2023-04-11 2023-03-31 13F MARATHON PETE COM 56585A102 0 -2,025 -100.00 0 0.0000
2023-01-12 2022-12-31 13F MARATHON PETE COM 56585A102 2,025 2,025 0 0.0589
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.