Gerald M Blumenstock Axcelis Technologies Inc (ACLS) insider trading activity

Gerald M Blumenstock is EVP, Research, Dev. & Eng. of AXCELIS TECHNOLOGIES INC. Currently has a direct ownership of 18,661 shares of ACLS, which is worth approximately $1.52 Million. The most recent transaction as insider was on Dec 11, 2025, when has been sold 3,034 shares (Common Stock) at a price of $89.46 per share, resulting in proceeds of $271,421. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 18.7K

13.98% 3M change

94.95% 12M change

Total Value Held $1.52 Million

Gerald M Blumenstock Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Dec 11 2025	SELL Open market or private sale	$271,421 $89.46 p/Share	3,034 Reduced 13.98%	18,661 Common Stock
Jun 16 2025	SELL Payment of exercise price or tax liability	$34,893 $68.96 p/Share	506 Reduced 2.28%	21,695 Common Stock
May 15 2025	SELL Payment of exercise price or tax liability	$21,621 $62.67 p/Share	345 Reduced 1.53%	22,201 Common Stock
May 15 2025	BUY Grant, award, or other acquisition	-	12,296 Added 35.29%	22,546 Common Stock
Feb 28 2025	SELL Payment of exercise price or tax liability	$40,982 $54.79 p/Share	748 Reduced 6.8%	10,250 Common Stock
Jun 17 2024	SELL Payment of exercise price or tax liability	$42,510 $138.02 p/Share	308 Reduced 3.12%	9,572 Common Stock
May 15 2024	BUY Grant, award, or other acquisition	-	5,698 Added 36.58%	9,880 Common Stock

Jun 15 2023	BUY Grant, award, or other acquisition	-	4,182 Added 50.0%	4,182 Common Stock

GMB

Gerald M Blumenstock

EVP, Research, Dev. & Eng.

Beverly, MA

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