Costanzo Brian J.
Markel Corporation · Chief Financial Officer
Costanzo Brian J. is listed in public filings as officer: Chief Financial Officer. This Costanzo Brian J. insider trading page organizes Form 4 disclosures, reported purchases and sales, transaction dates, share amounts, related issuers, and historical insider activity so readers can review the person's public trading record in one place. Companies and tickers connected to this insider trading profile include Markel Corporation (MKL). Investors use Costanzo Brian J.'s insider trading disclosures to study buying and selling patterns, position changes, company-specific activity, and the source evidence behind each reported transaction.
Latest Actions
| Company | Holding Value | Last Transaction | Amount | Transaction Price | Current Price |
|---|---|---|---|---|---|
| $2.7M1.6k shares | OtherMay 15, 2026 | $50.0K30 shares | $1,659.60 | -- | |
| $3.0M1.6k shares | Grant / ExerciseMay 15, 2026 | $24.1K13 shares | $1,844.00 | -- |
Insider Trades History
| Company | Holding Value | Last Transaction | Amount | Transaction Price | Current Price |
|---|---|---|---|---|---|
| $2.6M1.6k shares | OtherMar 31, 2026 | $3.0K2 shares | $1,626.96 | -- | |
| --1.6k shares | Grant / ExerciseFeb 24, 2026 | Disclosure amount unavailable655 shares | -- | -- | |
| $1.5M956.5 shares | OtherDec 31, 2025 | $3.5K2 shares | $1,602.62 | -- | |
| $2.0M954.4 shares | Grant / ExerciseDec 2, 2025 | $44.8K22 shares | $2,060.83 | -- | |
| $1.6M976.1 shares | OtherSep 30, 2025 | $3.0K2 shares | $1,624.66 | -- | |
| $1.5M974.2 shares | OtherJun 30, 2025 | $3.5K2 shares | $1,580.87 | -- | |
| $1.4M972 shares | OtherMar 31, 2025 | $3.0K2 shares | $1,459.76 | -- | |
| --970 shares | Grant / ExerciseFeb 18, 2025 | Disclosure amount unavailable379 shares | -- | -- | |
| $789k590.6 shares | OtherDec 31, 2024 | $2.8K2 shares | $1,336.81 | -- | |
| $1.0M588.5 shares | Grant / ExerciseDec 5, 2024 | $36.9K21 shares | $1,759.04 | -- | |
| $813k609.5 shares | OtherSep 30, 2024 | $2.4K2 shares | $1,333.29 | -- | |
| $779k607.7 shares | OtherJun 28, 2024 | $2.8K2 shares | $1,282.46 | -- |