David Philip Henry Mks Instruments Inc (MKSI) insider trading activity

David Philip Henry is EVP, Operations & Corp Mktg of MKS INSTRUMENTS INC. Currently has a direct ownership of 20,571 shares of MKSI, which is worth approximately $2.1 Million. The most recent transaction as insider was on Jul 03, 2025, when has been sold 2,000 shares (Common Stock) at a price of $105.0 per share, resulting in proceeds of $210,000. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 20.6K

8.24% 3M change

24.45% 12M change

Total Value Held $2.1 Million

David Philip Henry Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Jul 03 2025	SELL Open market or private sale	$210,000 $105.0 p/Share	2,000 Reduced 8.86%	20,571 Common Stock
Feb 18 2025	SELL Payment of exercise price or tax liability	$245,905 $103.67 p/Share	2,372 Reduced 9.57%	22,419 Common Stock
Feb 18 2025	BUY Exercise of conversion of derivative security	-	8,012 Added 24.42%	24,791 Common Stock
Feb 15 2024	SELL Payment of exercise price or tax liability	$328,827 $122.15 p/Share	2,692 Reduced 14.01%	16,529 Common Stock
Feb 15 2024	BUY Exercise of conversion of derivative security	-	8,022 Added 29.45%	19,221 Common Stock
Nov 07 2023	BUY Open market or private purchase	$170,850 $68.34 p/Share	2,500 Added 18.42%	11,073 Common Stock
Feb 15 2023	SELL Payment of exercise price or tax liability	$163,372 $100.29 p/Share	1,629 Reduced 16.21%	8,423 Common Stock
Feb 15 2023	BUY Exercise of conversion of derivative security	-	5,538 Added 35.52%	10,052 Common Stock
Apr 18 2022	SELL Payment of exercise price or tax liability	$18,628 $114.99 p/Share	162 Reduced 3.6%	4,335 Common Stock
Apr 18 2022	BUY Exercise of conversion of derivative security	-	479 Added 9.63%	4,497 Common Stock
Feb 15 2022	SELL Payment of exercise price or tax liability	$130,583 $152.55 p/Share	856 Reduced 17.56%	4,018 Common Stock
Feb 15 2022	BUY Exercise of conversion of derivative security	-	2,912 Added 37.4%	4,874 Common Stock
May 20 2021	SELL Open market or private sale	$53,023 $186.7 p/Share	284 Reduced 13.6%	1,805 Common Stock
Apr 15 2021	SELL Payment of exercise price or tax liability	$26,545 $188.26 p/Share	141 Reduced 6.32%	2,089 Common Stock
Apr 15 2021	BUY Exercise of conversion of derivative security	-	479 Added 17.68%	2,230 Common Stock
Apr 13 2021	SELL Payment of exercise price or tax liability	$19,585 $186.52 p/Share	105 Reduced 5.66%	1,751 Common Stock
Apr 13 2021	BUY Exercise of conversion of derivative security	-	356 Added 16.09%	1,856 Common Stock
Feb 16 2021	SELL Payment of exercise price or tax liability	$59,237 $172.2 p/Share	344 Reduced 18.66%	1,500 Common Stock
Feb 16 2021	BUY Exercise of conversion of derivative security	-	1,170 Added 38.82%	1,844 Common Stock

DPH

David Philip Henry

EVP, Operations & Corp Mktg

Andover, MA

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