MKS INC — Director's Dealing 2021

Dec 6, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2021-12-03

Reporting Person: BAGSHAW SETH H (Sr. VP, CFO & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-03	Common Stock	M	325	—	Acquired	22317.122	Direct
2021-12-03	Common Stock	M	194	—	Acquired	22511.122	Direct
2021-12-03	Common Stock	F	519	$156.09	Disposed	21992.122	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-03	Restricted Stock Unit	$	M	325	Disposed		Common Stock (325)	Direct
2021-12-03	Restricted Stock Unit	$	M	194	Disposed		Common Stock (194)	Direct

Footnotes

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

F2: Shares used to satisfy FICA taxes.

F3: Portion of 2020 RSU Award accelerated to satisfy FICA taxes.

F4: Portion of 2021 RSU Award accelerated to satisfy FICA taxes.