GAYNER THOMAS SINNICKSON (CIK 1159015) reported 3 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-19). Recent activity: Sell MKL (482 shares), Buy MKL (4,484 shares), Sell MKL (37 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-19 | MARKEL GROUP INC. (MKL) | Chief Executive Officer | Sell | 482 | $888,199 |
| 2026-02-26 | MARKEL GROUP INC. (MKL) | Chief Executive Officer | Buy | 4,484 | $0 |
| 2025-12-03 | MARKEL GROUP INC. (MKL) | Chief Executive Officer | Sell | 37 | $75,447 |
来源：SEC Form 4 申报文件 · 截至 2026-05-19