Browse the complete record of transactions filed by Costanzo Brian J., Autre. Director active across 2 companies, notably MARKEL CORP. In total, 24 filings have been logged. History available since 15 February 2022. The latest transaction was disclosed on 30 June 2026 (J). Regulator: SEC (Form 4). The full history is free.
Companies and markets linked to Costanzo Brian J.
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Costanzo Brian J. is a declarant linked to MARKEL GROUP INC., where he is Chief Financial Officer, and to MARKEL CORP, where he is SVP, Finance, CAO & Controller. He has 24 filings in total, and across the 24 sampled filings between 2022-02-17 and 2026-07-16, both buy and sell amounts are 0 EUR.