InsiderTrades

St Dennis Thomas

SEC CIK 1339595 · EDGAR

Buying vs selling by month open-market trades, last 60 months, all 3 companies
BoughtSold

Companies

TickerCompanyTitleHoldingBoughtSoldTradesFirstLast
FORMFORMFACTOR INCDir 28.3K — $2.48M 162022-02-082026-06-16
ACLSAXCELIS TECHNOLOGIES INCDir 17.7K — $2.29M 112021-08-302026-05-22
VECOVEECO INSTRUMENTS INCDir 61.7K $54.0K $437.4K 92022-05-132026-05-11

Most active insiders at FORM, 12 months

#InsiderTitleBoughtSold
1 SLESSOR MIKECEO, Dir —$14.79M
2 Rhodes SheriDir —$1.50M
3 St Dennis ThomasDir —$1.34M
4 STEVEN-WAISS KELLEYDir —$1.24M
5 WHITE BRIAN CDir —$1.14M
6 Obregon-Jimenez RebecaDir —$749.6K
7 Titinger JorgeDir —$694.0K
8 McKinnis Aric BrendanCFO, SVP Gbl Fin —$313.0K
9 BREWER KEVIN JDir —$288.6K

Transactions 36

Type
Reset
X Filed Traded Ticker Company Insider Title Type Price Qty Owned ΔOwn Value
2026-06-16 20:31 2026-06-15 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $151.49 -2,800 29.1K -9% -$424.2K
2026-06-16 20:31 2026-06-16 FORM FORMFACTOR INC St Dennis Thomas Dir G - Gift $0.00 -740 28.3K -3% $0
2026-05-26 17:05 2026-05-22 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir S - Sale $155.37 -900 17.7K -5% -$139.8K
2026-05-21 17:48 2026-05-19 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $115.84 -1,000 31.9K -3% -$115.8K
2026-05-19 19:10 2026-05-15 FORM FORMFACTOR INC St Dennis Thomas Dir A - Grant $0.00 +1,347 32.9K +4% $0
2026-05-18 17:05 2026-05-15 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir A - Grant $0.00 +1,440 18.6K +8% $0
2026-05-13 16:30 2026-05-11 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir S - Sale $61.93 -1,400 61.7K -2% -$86.7K
2026-05-11 16:40 2026-05-08 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir A - Grant $0.00 +2,945 63.1K +5% $0
M 2026-02-11 2026-02-10 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $93.84 -7,431 31.5K -19% -$697.3K
2025-11-17 2025-11-17 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $49.85 -2,000 39.0K -5% -$99.7K
2025-05-30 2025-05-29 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $31.24 -3,000 41.0K -7% -$93.7K
2025-05-16 2025-05-16 FORM FORMFACTOR INC St Dennis Thomas Dir A - Grant $0.00 +6,528 44.0K +17% $0
2025-05-15 2025-05-15 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir A - Grant $0.00 +3,586 17.2K +26% $0
2025-05-09 2025-05-09 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir A - Grant $0.00 +8,291 60.2K +16% $0
2024-11-06 2024-11-05 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $39.11 -3,100 37.4K -8% -$121.2K
2024-05-21 2024-05-17 FORM FORMFACTOR INC St Dennis Thomas Dir A - Grant $0.00 +3,828 40.5K +10% $0
A 2024-05-16 2024-05-15 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir A - Grant $0.00 +1,662 13.6K +14% $0
2024-05-15 2024-05-15 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir A - Grant $0.00 +1,162 13.1K +10% $0
2024-05-14 2024-05-13 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir S - Sale $37.72 -4,000 51.9K -7% -$150.9K
2024-05-13 2024-05-10 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $56.30 -2,000 36.7K -5% -$112.6K
2024-05-10 2024-05-10 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir A - Grant $0.00 +3,677 55.9K +7% $0
2023-12-01 2023-11-30 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir S - Sale $28.52 -7,005 52.2K -12% -$199.8K
2023-11-15 2023-11-14 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $38.24 -3,792 38.7K -9% -$145.0K
2023-05-30 2023-05-19 FORM FORMFACTOR INC St Dennis Thomas Dir A - Grant $0.00 +6,770 42.5K +19% $0
2023-05-15 2023-05-12 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir A - Grant $0.00 +6,760 59.2K +13% $0
2023-05-15 2023-05-15 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir A - Grant $0.00 +1,282 11.9K +12% $0
2023-02-17 2023-02-16 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $32.31 -13.0K 30.9K -30% -$420.0K
2023-02-13 2023-02-13 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir S - Sale $127.02 -12.0K 10.6K -53% -$1.52M
2022-11-18 2022-11-18 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir S - Sale $76.66 -3,000 22.6K -12% -$230.0K
2022-05-17 2022-05-13 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir A - Grant $0.00 +6,591 52.4K +14% $0
2022-05-17 2022-05-16 VECO VEECO INSTRUMENTS INC St Dennis Thomas Dir P - Purchase $21.60 +2,500 — New +$54.0K
D 2022-05-17 2022-05-14 FORM FORMFACTOR INC St Dennis Thomas Dir M - OptEx $0.00 +3,792 43.9K +9% $0
2022-05-16 2022-05-16 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir A - Grant $0.00 +2,689 25.6K +12% $0
2022-02-10 2022-02-10 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir S - Sale $72.81 -3,000 22.9K -12% -$218.4K
2022-02-09 2022-02-08 FORM FORMFACTOR INC St Dennis Thomas Dir S - Sale $41.63 -6,000 40.1K -13% -$249.8K
2021-08-30 2021-08-30 ACLS AXCELIS TECHNOLOGIES INC St Dennis Thomas Dir S - Sale $50.32 -3,500 25.9K -12% -$176.1K

Purchase Sale Sale after option exercise All abbreviations