Eric Robert Taranto - 06 Mar 2026 Form 4 Insider Report for MKS INC (MKSI)

Role: EVP & GM, VSD
Signature: /s/ James Kruger, attorney-in-fact
Issuer symbol: MKSI
Transactions as of: 06 Mar 2026
Net transactions value: -$1,007,318
Form type: 4
Filing time: 09 Mar 2026, 12:01:15 UTC
Previous filing: 23 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Taranto Eric Robert	EVP & GM, VSD	C/O MKS INC., 2 TECH DRIVE, ANDOVER	/s/ James Kruger, attorney-in-fact	09 Mar 2026	0001842235

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MKSI	Common Stock	Sale	$1,007,318	-4,568	-23%	$220.52	15,445	06 Mar 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This transaction was executed in multiple trades at prices ranging from $220.3701 to $220.780. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.