Costanzo Brian J. Insider Trading -- Recent SEC Form 4 Transactions

Costanzo Brian J. (CIK 1873434) reported 11 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-19). Recent activity: Sell MKL (13 shares), Buy MKL (30 shares), Buy MKL (2 shares), Buy MKL (655 shares), Buy MKL (2 shares). Source: SEC Form 4.

DateCompanyRoleTypeSharesValue
2026-05-19MARKEL GROUP INC. (MKL)Chief Financial OfficerSell13$24,120
2026-05-19MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy30$50,000
2026-04-15MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy2$3,000
2026-02-26MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy655$0
2026-01-20MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy2$3,494
2025-12-03MARKEL GROUP INC. (MKL)Chief Financial OfficerSell22$44,761
2025-10-16MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy2$3,006
2025-07-16MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy2$3,494
2025-04-17MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy2$3,007
2025-02-20MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy379$0
2025-01-17MARKEL GROUP INC. (MKL)Chief Financial OfficerBuy2$2,794

Source: SEC Form 4 filings · as of 2026-05-19