MKS INC — Director's Dealing 2021

Apr 14, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2021-04-13

Reporting Person: Henry David Philip (SVP, Corp Mkt, PMO & Glob Svc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-13	Common Stock	M	356.376	—	Acquired	1856.58	Direct
2021-04-13	Common Stock	F	105	$186.52	Disposed	1751.58	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-04-13	Restricted Stock Unit	$	M	356.376	Disposed		Common Stock (356.376)	Direct

Footnotes

F1: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F2: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

F3: These RSUs vested on April 13, 2021.