Quick Takeaways
- Thomas St Dennis has 3 issuer positions tracked on this page.
- Estimated disclosed ownership value: $4,885,569.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Thomas St Dennis
- Location
- Livermore, CA
- Summary
- The estimated net worth of Thomas St Dennis is at least $4,885,569 dollars as of 11 Feb 2026. Thomas St Dennis is the Director of FORMFACTOR INC and owns shares of FORMFACTOR INC (FORM) stock worth about $2.97M. Thomas St Dennis is the Director of VEECO INSTRUMENTS INC and owns shares of VEECO INSTRUMENTS INC (VECO) stock worth about $1.11M. Thomas St Dennis is the Director of AXCELIS TECHNOLOGIES INC and owns shares of AXCELIS TECHNOLOGIES INC (ACLS) stock worth about $807.1K.
- Signature
- /s/: Stan Finkelstein, Attorney-in-fact for Thomas St. Dennis
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Thomas St Dennis and return when a new Insider Trading filing appears.
This tracks SEC filing changes for this page using existing product update flows.
What Changed
- Largest disclosed position: FORMFACTOR INC ($2,971,029).
- Past-year value change for that position: -$890,768.
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of Thomas St Dennis
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| FORM | FORMFACTOR INC | Director | $2,971,029 | -$890,768 | -23% | 10 Feb 2026 |
| VECO | VEECO INSTRUMENTS INC | Director | $1,107,398 | 09 May 2025 | ||
| ACLS | AXCELIS TECHNOLOGIES INC | Director | $807,142 | 15 May 2025 |
Insider Transactions Reported by Thomas St Dennis:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.