THOMAS SINNICKSON GAYNER
CIK 1159015 · Chief Executive Officer · last filed 2026-05-19
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$113.36M
Companies
8
Total Filings
163
Lifetime Open-Market Net
$15.86M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MKL | Chief Executive Officer | 56,682 | $1846.00 | $104.64M | -$2.99M | 51 | 2026-05-19 |
| KO | Director | 5,200 | $82.62 | $429.6K | $0 | 4 | 2026-04-03 |
| GHC | Director | 5,900 | $1174.18 | $6.93M | $365.3K | 6 | 2024-09-13 |
| CABO | Director | 29,120 | $47.00 | $1.37M | $18.48M | 25 | 2023-03-13 |
| Enovis CORP (CFXA) Delisted | Director | 65,060 | $177.71 | $11.56M | $0 | 15 | 2022-01-04 |
| Enovis CORP (CFX) Delisted | Director | 49,447 | $117.18 | $5.79M | $0 | 50 | 2019-01-03 |
| Cable One, Inc. (CABOw) Delisted | Director | 5,300 | — | — | $0 | 1 | 2015-07-01 |
| MARKEL GROUP INC. (MKV) Delisted | Pres. & Chief Investment Off. | 31,959 | — | — | $0 | 11 | 2011-12-05 |
Recent Filings · Page 5 of 17
163 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2022-05-24 | CABO | Grant (A) | +230 | $0 | EDGAR |
| 2022-05-09 | MKL | Buy (P) | +50 | $65.3K | EDGAR |
| 2022-02-17 | MKL | Grant (A) | +1,874 | $0 | EDGAR |
| 2022-01-04 | Enovis CORP (CFXA) Delisted | Grant (A) | +490 | $0 | EDGAR |
| 2021-12-09 | MKL | Tax (F) | −32 | -$40.0K | EDGAR |
| 2021-11-23 | MKL | Buy (P) | +25 | $31.3K | EDGAR |
| 2021-11-15 | GHC | Buy (P) | +100 | $59.5K | EDGAR |
| 2021-10-04 | Enovis CORP (CFXA) Delisted | Grant (A) | +491 | $0 | EDGAR |
| 2021-07-01 | Enovis CORP (CFXA) Delisted | Grant (A) | +492 | $0 | EDGAR |
| 2021-05-25 | CABO | Grant (A) | +129 | $0 | EDGAR |
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.