Who
Thomas St Dennis
Director
Company insider
Files Form 4 as: Executive Chairman, FormFactor; Director, Axcelis Technologies; Director, Veeco Instruments; Director, Mattson Technology; Senior Vice President, Applied Materials.
In numbers
- Trades disclosed
- 241
- Buys
- 2
- Sells
- 62
- Bought
- $88K
- Sold
- $23.1M
- Companies
- 5
- Companies where not an officer
- 3
- First trade
- 6 Sep 2006
- Last trade
- 16 Jun 2026
- Last filed
- 16 Jun 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 16 Jun 2026filed 16 Jun 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Code G | —740 at $0.00 | filing |
| 16 Jun 2026filed 16 Jun 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Code G | —740 at $0.00 | filing |
| 15 Jun 2026filed 16 Jun 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $424K2,800 at $151.49 | filing |
| 15 Jun 2026filed 16 Jun 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $424K2,800 at $151.49 | filing |
| 22 May 2026filed 26 May 2026 | ACLS Axcelis TechnologiesSemiconductor Equipment | SEC FORM 4 Sold | $140K900 at $155.37 | filing |
| 22 May 2026filed 26 May 2026 | ACLS Axcelis TechnologiesSemiconductor Equipment | SEC FORM 4 Sold | $140K900 at $155.37 | filing |
| 19 May 2026filed 21 May 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $116K1,000 at $115.84 | filing |
| 19 May 2026filed 21 May 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $116K1,000 at $115.84 | filing |
| 15 May 2026filed 19 May 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Code A | —1,347 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Code A | —1,347 at $0.00 | filing |
| 15 May 2026filed 18 May 2026 | ACLS Axcelis TechnologiesSemiconductor Equipment | SEC FORM 4 Code A | —1,440 at $0.00 | filing |
| 15 May 2026filed 18 May 2026 | ACLS Axcelis TechnologiesSemiconductor Equipment | SEC FORM 4 Code A | —1,440 at $0.00 | filing |
| 11 May 2026filed 13 May 2026 | VECO Veeco InstrumentsSemiconductor Equipment | SEC FORM 4 Sold | $87K1,400 at $61.93 | filing |
| 11 May 2026filed 13 May 2026 | VECO Veeco InstrumentsSemiconductor Equipment | SEC FORM 4 Sold | $87K1,400 at $61.93 | filing |
| 8 May 2026filed 11 May 2026 | VECO Veeco InstrumentsSemiconductor Equipment | SEC FORM 4 Code A | —2,945 at $0.00 | filing |
| 8 May 2026filed 11 May 2026 | VECO Veeco InstrumentsSemiconductor Equipment | SEC FORM 4 Code A | —2,945 at $0.00 | filing |
| 10 Feb 2026filed 11 Feb 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $525K5,601 at $93.71 | filing |
| 10 Feb 2026filed 11 Feb 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $172K1,830 at $94.24 | filing |
| 10 Feb 2026filed 11 Feb 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $525K5,601 at $93.71 | filing |
| 10 Feb 2026filed 11 Feb 2026 | FORM FormFactorSemiconductor Equipment | SEC FORM 4 Sold | $172K1,830 at $94.24 | filing |
News
Head-To-Head Survey: Micron Technology (NASDAQ:MU) & FormFactor (NASDAQ:FORM)FORM · tickerreport.com · 18 Oct 2026FormFactor (NASDAQ: FORM) CEO sells 11,098 shares in planned tradeFORM · themarketsdaily.com · 18 Oct 2026Critical Contrast: Veeco Instruments (NASDAQ:VECO) vs. inTEST (NYSE:INTT)VECO · tickerreport.com · 17 Oct 2026FormFactor and Teradyne Announce Strategic Collaboration to Accelerate Next-Generation Semiconductor TestingFORM · manilatimes.net · 12 Oct 2026Why Veeco Instruments Stock Crushed it Last MonthVECO · fool.com · 7 Oct 2026Ambiq Micro (NYSE:AMBQ) & Axcelis Technologies (NASDAQ:ACLS) Head-To-Head ReviewACLS · tickerreport.com · 5 Oct 2026
0 headlines in the last 90 days name Thomas St Dennis; 6 articles from the last 14 days about the 3 companies they traded most, at most three about any one of them.