Thomas St Dennis
CIK 1339595 · EXECUTIVE CHAIRMAN · last filed 2026-05-26
"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
$175.01M
Companies
5
Total Filings
117
Lifetime Open-Market Net
-$21.03M
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 |
|---|---|---|---|---|---|---|---|
| ACLS | Director | 17,695 | $180.12 | $3.19M | -$2.80M | 22 | 2026-05-26 |
| FORM | Director | 77,873 | $139.21 | $10.84M | -$16.31M | 62 | 2026-05-21 |
| VECO | Director | 61,697 | $77.48 | $4.78M | -$383.4K | 15 | 2026-05-13 |
| MATTSON TECHNOLOGY INC (MTSN) Delisted | Director | 0 | — | — | $0 | 4 | 2016-05-11 |
| AMAT | Senior Vice President | 275,373 | $567.25 | $156.21M | -$1.53M | 14 | 2009-09-02 |
Recent Filings · Page 8 of 12
117 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2016-05-23 | FORM | Grant (A) | — | $0 | EDGAR |
| 2016-05-17 | ACLS | Grant (A) | +30,545 | $0 | EDGAR |
| 2016-05-11 | MATTSON TECHNOLOGY INC (MTSN) Delisted | Disp (D) | −33,500 | -$127.3K | EDGAR |
| 2016-05-09 | FORM | Exer (M) | +40,000 | $0 | EDGAR |
| 2016-05-06 | VECO | Grant (A) | +7,005 | $120.0K | EDGAR |
| 2016-05-03 | FORM | Exer (M) | +116,600 | $0 | EDGAR |
| 2016-04-08 | FORM | Grant (A) | — | $0 | EDGAR |
| 2015-07-16 | ACLS | Grant (A) | +16,000 | $0 | EDGAR |
| 2015-06-01 | FORM | Grant (A) | — | $0 | EDGAR |
| 2015-05-29 | MATTSON TECHNOLOGY INC (MTSN) Delisted | Grant (A) | +12,500 | $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.