Dennis Thomas St Formfactor Inc (FORM) insider trading activity

Dennis Thomas St is Director of FORMFACTOR INC. Currently has a direct ownership of 38,957 shares of FORM, which is worth approximately $1.95 Million. The most recent transaction as insider was on Nov 17, 2025, when has been sold 2,000 shares (Common Stock) at a price of $49.85 per share, resulting in proceeds of $99,700. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 39K

4.88% 3M change

4.08% 12M change

Total Value Held $1.95 Million

Dennis Thomas St Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Nov 17 2025	SELL Open market or private sale	$99,700 $49.85 p/Share	2,000 Reduced 4.88%	38,957 Common Stock
May 29 2025	SELL Open market or private sale	$93,720 $31.24 p/Share	3,000 Reduced 6.82%	40,957 Common Stock
May 16 2025	BUY Grant, award, or other acquisition	-	6,528 Added 12.93%	43,957 Common Stock
Nov 05 2024	SELL Open market or private sale	$121,241 $39.11 p/Share	3,100 Reduced 7.65%	37,429 Common Stock
May 17 2024	BUY Grant, award, or other acquisition	-	3,828 Added 8.63%	40,529 Common Stock
May 10 2024	SELL Open market or private sale	$112,600 $56.3 p/Share	2,000 Reduced 5.17%	36,701 Common Stock
Nov 14 2023	SELL Open market or private sale	$145,006 $38.24 p/Share	3,792 Reduced 8.92%	38,701 Common Stock

May 19 2023	BUY Grant, award, or other acquisition	-	6,770 Added 13.74%	42,493 Common Stock
Feb 16 2023	SELL Open market or private sale	$420,030 $32.31 p/Share	13,000 Reduced 29.62%	30,890 Common Stock
May 14 2022	BUY Exercise of conversion of derivative security	-	3,792 Added 7.95%	43,890 Common Stock
Feb 08 2022	SELL Open market or private sale	$249,780 $41.63 p/Share	6,000 Reduced 13.02%	40,098 Common Stock
May 17 2021	BUY Exercise of conversion of derivative security	-	7,098 Added 13.34%	46,098 Common Stock

Also insider at

VECO

VEECO INSTRUMENTS INC Technology

ACLS

AXCELIS TECHNOLOGIES INC Technology

DTS

Dennis Thomas St

Director

Livermore, CA

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