Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionDiNuzzo Private Wealth, Inc.
Latest Disclosed Ownership750 shares
Latest Disclosed Value $ 183,135
DiNuzzo Private Wealth, Inc. reports 0.13% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 8, 2026 - DiNuzzo Private Wealth, Inc. filed a 13F-HR form disclosing ownership of 750 shares of Marathon Petroleum Corporation (MX:MPC) valued at $183,135 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 751 shares of Marathon Petroleum Corporation. This represents a change in shares of -0.13% 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)
2026-04-08 2026-03-31 13F MARATHON PETE COM 56585A102 750 -1 -0.13 183 50.00 0.0197
2026-01-16 2025-12-31 13F MARATHON PETE COM 56585A102 751 1 0.13 122 -8.96 0.0133
2025-10-14 2025-09-30 13F MARATHON PETE COM 56585A102 750 -2 -0.27 135 8.06 0.0153
2025-07-17 2025-06-30 13F MARATHON PETE COM 56585A102 752 -11 -1.44 125 11.71 0.0148
2025-04-25 2025-03-31 13F MARATHON PETE COM 56585A102 763 1 0.13 111 4.72 0.0140
2025-01-23 2024-12-31 13F MARATHON PETE COM 56585A102 762 -1 -0.13 106 -14.52 0.0135
2024-10-17 2024-09-30 13F MARATHON PETE COM 56585A102 763 414 118.62 124 106.67 0.0153
2024-07-30 2024-06-30 13F MARATHON PETE COM 56585A102 349 8 2.35 61 -11.76 0.0082
2024-05-06 2024-03-31 13F MARATHON PETE COM 56585A102 341 0 0.00 69 36.00 0.0093
2024-05-06 2023-12-31 13F/A-1 MARATHON PETE COM 56585A102 341 341 51 0.0072
2024-02-06 2023-12-31 13F MARATHON PETE COM 56585A102 341 341 51 0.0071
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.