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Reporting owner

Costanzo Brian J.

Reporting owner CIK 0001873434 · Chief Financial Officer

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These transactions appear in filings associated with this reporting owner. Jointly reported quantities and amounts are unallocated; they are not this owner's individual purchases or total holdings. Names and roles reflect the relevant filing, and a reporting owner may be a person or an organization.

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Transaction timeline

Who reported an acquisition, and when the transaction occurred.

Reported acquisitions by transaction dateEach row is a reporting owner. Select a marker to open its transaction details. Jointly reported transactions appear for each associated reporting owner, without dividing quantities or amounts.Costanzo Brian J.Costanzo Brian J.Costanzo Brian J. · September 30, 2026 · Other acquisition · Common StockCostanzo Brian J. · September 30, 2025 · Other acquisition · Common StockSep 30, 2025Sep 30, 2026
PurchaseStock awardGift receivedExercise / conversionConversionOther acquisition

2 dated transactions · 1 of 1 reporting owners shown. Select one owner to focus the chart.

View timeline as a table
Transaction dateCompany / securityReporting ownersAcquisition type
Sep 30, 2026MARKEL GROUP INC.Common StockCostanzo Brian J.Other acquisition
Sep 30, 2025MARKEL GROUP INC.Common StockCostanzo Brian J.Other acquisition

Only transactions on this page are shown. Date windows end on the latest transaction date in this sample. Joint filings may appear on more than one row. Sales are not included. Share-price charts use a separate data source.

Transactions in associated filings

Reported insider acquisitions, ordered by filing date, newest first. Currency is shown only when reported.
Filed / transactedCompanyReporting ownersType / securityQuantityPrice / reference valueDetails
Trade: MARKEL GROUP INC.MKL · company listings
Costanzo Brian J.Chief Financial Officer
Other acquisitionCommon StockNon-derivative security · Code J2.0611,455.58Value: 2,999.95038Currency not specifiedView ↗
Trade: MARKEL GROUP INC.MKL · company listings
Costanzo Brian J.Chief Financial Officer
Other acquisitionCommon StockNon-derivative security · Code J1.8461,624.66Value: 2,999.12236Currency not specifiedView ↗