Thomas St Dennis
CIK: 0001339595
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (16 total)
- Jun 16, 2026FORM
FORMFACTOR INC
Gift(G)Direct740 shares- - Jun 15, 2026FORM
FORMFACTOR INC
Sale(S)Direct2.8K shares at avg. $151.49$424K - May 22, 2026ACLS
AXCELIS TECHNOLOGIES INC
Sale(S)Direct900 shares at avg. $155.37$140K - May 19, 2026FORM
FORMFACTOR INC
Sale(S)Direct1K shares at avg. $115.84$116K - May 15, 2026FORM
FORMFACTOR INC
Award(A)Direct1.3K shares- - May 15, 2026ACLS
AXCELIS TECHNOLOGIES INC
Award(A)Direct1.4K shares- - May 11, 2026VECO
VEECO INSTRUMENTS INC
Sale(S)Direct1.4K shares at avg. $61.93$87K - May 8, 2026VECO
VEECO INSTRUMENTS INC
Award(A)Direct2.9K shares- - Feb 10, 2026FORM
FORMFACTOR INC
Sale(S)Direct5.6K shares at avg. $93.71$525K - Feb 10, 2026FORM
FORMFACTOR INC
Sale(S)Direct1.8K shares at avg. $94.24$172K - Nov 17, 2025FORM
FORMFACTOR INC
Sale(S)Direct2K shares at avg. $49.85$100K - May 29, 2025FORM
FORMFACTOR INC
Sale(S)Direct3K shares at avg. $31.24$94K - May 16, 2025FORM
FORMFACTOR INC
Award(A)Direct6.5K shares- - May 15, 2025ACLS
AXCELIS TECHNOLOGIES INC
Award(A)Direct3.6K shares- - May 9, 2025VECO
VEECO INSTRUMENTS INC
Award(A)Direct8.3K shares- - Nov 5, 2024FORM
FORMFACTOR INC
Sale(S)Direct3.1K shares at avg. $39.11$121K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 16, 2026 |  FORM FORMFACTOR INC | Gift(G) | 740 | - | $0 | Direct |
| Jun 15, 2026 | FORM FORMFACTOR INC | Sale(S) | 2,800 | $151.49 | $424,172 | Direct |
| May 22, 2026 |  ACLS AXCELIS TECHNOLOGIES INC | Sale(S) | 900 | $155.37 | $139,833 | Direct |
| May 19, 2026 | FORM FORMFACTOR INC | Sale(S) | 1,000 | $115.84 | $115,840 | Direct |
| May 15, 2026 | FORM FORMFACTOR INC | Award(A) | 1,347 | - | $0 | Direct |
| May 15, 2026 | ACLS AXCELIS TECHNOLOGIES INC | Award(A) | 1,440 | - | $0 | Direct |
| May 11, 2026 |  VECO VEECO INSTRUMENTS INC | Sale(S) | 1,400 | $61.93 | $86,702 | Direct |
| May 8, 2026 | VECO VEECO INSTRUMENTS INC | Award(A) | 2,945 | - | $0 | Direct |
| Feb 10, 2026 | FORM FORMFACTOR INC | Sale(S) | 5,601 | $93.71 | $524,894 | Direct |
| Feb 10, 2026 | FORM FORMFACTOR INC | Sale(S) | 1,830 | $94.24 | $172,460 | Direct |
| Nov 17, 2025 | FORM FORMFACTOR INC | Sale(S) | 2,000 | $49.85 | $99,693 | Direct |
| May 29, 2025 | FORM FORMFACTOR INC | Sale(S) | 3,000 | $31.24 | $93,720 | Direct |
| May 16, 2025 | FORM FORMFACTOR INC | Award(A) | 6,528 | - | - | Direct |
| May 15, 2025 | ACLS AXCELIS TECHNOLOGIES INC | Award(A) | 3,586 | - | - | Direct |
| May 9, 2025 | VECO VEECO INSTRUMENTS INC | Award(A) | 8,291 | - | - | Direct |
| Nov 5, 2024 | FORM FORMFACTOR INC | Sale(S) | 3,100 | $39.11 | $121,233 | Direct |
1-16 of 16 transactions
About St Dennis Thomas
St Dennis Thomas (SEC CIK 0001339595) files insider reports with the SEC as Director of FORMFACTOR INC (FORM), Director of AXCELIS TECHNOLOGIES INC (ACLS) and Director of VEECO INSTRUMENTS INC (VECO).
Signal8 holds 14 ownership filings by St Dennis Thomas, all Form 4s, filed between Nov 6, 2024 and Jun 16, 2026. Those filings report 16 transactions, from Nov 5, 2024 to Jun 16, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on St Dennis Thomas's filings is in LIVERMORE, CA.
Recent filings by St Dennis Thomas
- Jun 16, 2026: Gift of FORM shares (Form 4, code G).
- Jun 15, 2026: Open-market sale of FORM shares (Form 4, code S).
- May 22, 2026: Open-market sale of ACLS shares (Form 4, code S).
- May 19, 2026: Open-market sale of FORM shares (Form 4, code S).
- May 15, 2026: Grant or award of FORM shares (Form 4, code A).
Other insiders filing for FORMFACTOR INC (FORM)
- SLESSOR MIKE, CEO
- STEVEN-WAISS KELLEY, Director
- McKinnis Aric Brendan, CFO, SVP Global Finance
- Rhodes Sheri, Director
- Obregon-Jimenez Rebeca, Director
- WHITE BRIAN C, Director