Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionNbc Securities, Inc.
Latest Disclosed Ownership10,733 shares
Latest Disclosed Value $ 2,620,887
Nbc Securities, Inc. reports 2,238.34% increase in ownership of MPC / Marathon Petroleum Corporation

On April 14, 2026 - Nbc Securities, Inc. filed a 13F-HR form disclosing ownership of 10,733 shares of Marathon Petroleum Corporation (MX:MPC) valued at $2,620,887 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 459 shares of Marathon Petroleum Corporation. This represents a change in shares of 2,238.34% 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)
2026-04-14 2026-03-31 13F MARATHON PETE COMMON STK 56585A102 10,733 10,274 2,238.34 2,621 3,440.54 0.1967
2026-01-29 2025-12-31 13F MARATHONPETECORP COMMONSTK 56585A102 459 0 0.00 75 -15.91 0.0056
2025-11-14 2025-09-30 13F MARATHON PETE COMMON STK 56585A102 459 -75 -14.04 88 0.0068
2025-07-08 2025-06-30 13F MARATHON PETE CORP COM COMMON STK 56585A102 534 -880 -62.23 0 0.0072
2025-04-09 2025-03-31 13F MARATHON PETE Stock 56585A102 1,414 1,411 47,033.33 0 0.0176
2025-01-22 2024-12-31 13F MARATHON PETE Stock 56585A102 3 -6,582 -99.95 0 -100.00 0.0436
2024-10-15 2024-09-30 13F MARATHON PETE Stock 56585A102 6,585 0 0.00 1 0.00 0.0900
2024-07-10 2024-06-30 13F MARATHON PETE Stock 56585A102 6,585 252 3.98 1 0.00 0.1039
2024-04-05 2024-03-31 13F MARATHON PETE Stock 56585A102 6,333 55 0.88 1 0.1198
2024-02-07 2023-12-31 13F MARATHON PETE Stock 56585A102 6,278 -30 -0.48 1 0.0939
2023-11-03 2023-09-30 13F MARATHON PETE Stock 56585A102 6,308 6,308 1 0.1048
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.