MKS INC — Director's Dealing 2022

Oct 31, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2022-10-28

Reporting Person: Burke Kathleen Flaherty (Sr. VP, GC & Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-10-28	Common Stock	M	2179.029	—	Acquired	48409.168	Direct
2022-10-28	Common Stock	F	967	$84.58	Disposed	47442.168	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2022-10-28	Restricted Stock Unit	$	M	2179.029	Disposed		Common Stock (2179.029)	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 vest in two equal annual installments on each of the second anniversary and third anniversary of the date of grant, October 28, 2019.