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
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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.

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

Insider ownership context is sourced from SEC Forms 3, 4, and 5.

See Original Filing

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.
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