Info
Insider Ownership

Insider Trading & Ownership of Brian J. Costanzo

Location: Glen Allen, VA
Summary: The estimated net worth of Brian J. Costanzo is at least $2.44M dollars as of December 3, 2025. Brian J. Costanzo is the Chief Financial Officer of MARKEL GROUP INC. and owns shares of MARKEL GROUP INC. (MKL) stock worth about $2.44M.
Signature: /s/ Sarah T. Mikowski, Attorney-in-fact for Brian J. Costanzo
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Ownership of Brian J. Costanzo

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
MKL	MARKEL GROUP INC.	Chief Financial Officer	$2.44M			Dec 2, 2025

Insider Transactions Reported by Brian J. Costanzo:

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.