Gayner Thomas Sinnickson
Markel Corporation · Chief Executive Officer
Gayner Thomas Sinnickson is listed in public filings as director, officer: Chief Executive Officer. This Gayner Thomas Sinnickson 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), Coca-Cola Company - Common (KO), and Graham Holdings Co (GHC). Investors use Gayner Thomas Sinnickson'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 |
|---|---|---|---|---|---|
| $104M56.3k shares | Grant / ExerciseMay 15, 2026 | $888.2K482 shares | $1,844.00 | -- |
Insider Trades History
| Company | Holding Value | Last Transaction | Amount | Transaction Price | Current Price |
|---|---|---|---|---|---|
| --15.2k shares | Grant / ExerciseApr 1, 2026 | Disclosure amount unavailable3.8k shares | -- | -- | |
| --56.7k shares | Grant / ExerciseFeb 24, 2026 | Disclosure amount unavailable4.5k shares | -- | -- | |
| $108M52.3k shares | Grant / ExerciseDec 2, 2025 | $75.5K37 shares | $2,060.83 | -- | |
| --11.1k shares | Grant / ExerciseApr 1, 2025 | Disclosure amount unavailable4.1k shares | -- | -- | |
| --52.3k shares | Grant / ExerciseFeb 18, 2025 | Disclosure amount unavailable3.4k shares | -- | -- | |
| $98M48.9k shares | BuyFeb 7, 2025 | $200.8K100 shares | $2,008.01 | -- | |
| $86M48.8k shares | Grant / ExerciseDec 5, 2024 | $79.2K45 shares | $1,759.04 | -- | |
| $76M48.9k shares | BuyNov 1, 2024 | $155.0K100 shares | $1,549.72 | -- | |
| $520k700 shares | BuySep 12, 2024 | $74.3K100 shares | $743.30 | -- |