Thomas St Dennis
CIK 1339595 · EXECUTIVE CHAIRMAN · last filed 2026-06-16
Thomas St Dennis is an EXECUTIVE CHAIRMAN who has filed 130 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing, for FORM, was dated Jun 16, 2026. Across all open-market trades the lifetime net is −$21.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $133.3M across reported positions.
"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.
$133.31M
5
130
-$21.45M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| FORM | Director | 74,333 | $95.41 | $7.09M | -$16.74M | 63 | 2026-06-16 |
| ACLS | Director | 17,695 | $110.09 | $1.95M | -$2.80M | 22 | 2026-05-26 |
| VECO | Director | 61,697 | $42.05 | $2.59M | -$383.4K | 15 | 2026-05-13 |
| MATTSON TECHNOLOGY INC (MTSN) Delisted | Director | 0 | — | — | $0 | 4 | 2016-05-11 |
| AMAT | Senior Vice President | 275,373 | $441.85 | $121.67M | -$1.53M | 14 | 2009-09-02 |
Recent Filings
130 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-16 | FORM | Mixed | −3,540 | -$424.2K | EDGAR |
| 2026-06-15 | FORM | Notice (144) | −2,800 | -$424.2K | EDGAR |
| 2026-05-26 | ACLS | Sell (S) | −900 | -$139.8K | EDGAR |
| 2026-05-22 | ACLS | Notice (144) | −900 | -$139.8K | EDGAR |
| 2026-05-21 | FORM | Sell (S) | −1,000 | -$115.8K | EDGAR |
| 2026-05-19 | FORM | Notice (144) | −1,000 | -$115.8K | EDGAR |
| 2026-05-19 | FORM | Grant (A) | +1,347 | $0 | EDGAR |
| 2026-05-18 | ACLS | Grant (A) | +1,440 | $0 | EDGAR |
| 2026-05-13 | VECO | Sell (S) | −1,400 | -$86.7K | EDGAR |
| 2026-05-11 | VECO | Notice (144) | −1,400 | -$86.7K | 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.