David Philip Henry - Feb 10, 2025 Form 4 Insider Report for MKS INSTRUMENTS INC (MKSI)

Role: EVP, Operations & Corp Mktg
Signature: /s/ James Kruger, attorney-in-fact
Stock symbol: MKSI
Transactions as of: Feb 10, 2025
Transactions value $: $0
Form type: 4
Date filed: 2/11/2025, 06:02 PM
Previous filing: Feb 16, 2024
Next filing: Feb 19, 2025
SEC: View on sec.gov

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MKSI	Restricted Stock Unit	Award		+1.37K	+9.94%		15.1K	Feb 10, 2025	Common Stock	1.37K		Direct	F1, F2

Showing 1 to 1 of 1 entries

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

Explanation of Responses:

Id	Content
F1	Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.
F2	These RSUs were subject to performance criteria, the achievement of which was determined on February 10, 2025, and thereafter vest in three equal annual installments beginning on February 15, 2025, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.