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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
CABO price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
4521 HIGHWOODS PARKWAY
GLEN ALLEN, VA 23060
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MKL | Chief Executive Officer | 56,682 | $1844.76 | $104.57M | -$2.99M | 51 | 2026-05-19 |
| KO | Director | 5,200 | $91.73 | $477.0K | $0 | 4 | 2026-04-03 |
| GHC | Director | 5,900 | $1170.09 | $6.90M | $365.3K | 6 | 2024-09-13 |
| CABO | Director | 29,120 | $5.37 | $156.4K | $18.48M | 26 | 2023-03-13 |
| Enovis CORP (CFXA) Delisted | Director | 65,060 | $177.71 | $11.56M | $0 | 15 | 2022-01-04 |
| Enovis CORP (CFX) Delisted | Director | 16,482 | $117.18 | $1.93M | $0 | 50 | 2019-01-03 |
| MARKEL GROUP INC. (MKV) Delisted | Pres. & Chief Investment Off. | 31,959 | — | — | $0 | 11 | 2011-12-05 |
Recent Filings · Page 14 of 17
163 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2013-01-02 | Enovis CORP (CFX) Delisted | Grant (A) | +279 | $0 | EDGAR |
| 2012-12-05 | MKL | Tax (F) | −24 | -$11.5K | EDGAR |
| 2012-10-02 | Enovis CORP (CFX) Delisted | Grant (A) | +307 | $0 | EDGAR |
| 2012-07-03 | Enovis CORP (CFX) Delisted | Grant (A) | +363 | $0 | EDGAR |
| 2012-05-17 | Enovis CORP (CFX) Delisted | Grant (A) | +1,383 | $0 | EDGAR |
| 2012-04-03 | Enovis CORP (CFX) Delisted | Grant (A) | +248 | $0 | EDGAR |
| 2012-01-04 | Enovis CORP (CFX) Delisted | Grant (A) | +307 | $0 | EDGAR |
| 2011-12-05 | MARKEL GROUP INC. (MKV) Delisted | Tax (F) | −20 | -$8.4K | EDGAR |
| 2011-10-04 | Enovis CORP (CFX) Delisted | Grant (A) | +432 | $0 | EDGAR |
| 2011-07-05 | Enovis CORP (CFX) Delisted | Grant (A) | +353 | $0 | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.