MKS INC — Director's Dealing 2022

Feb 16, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2022-02-15

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-02-15	Common Stock	M	1171	—	Acquired	3133.237	Direct
2022-02-15	Common Stock	M	1161	—	Acquired	4294.237	Direct
2022-02-15	Common Stock	M	580	—	Acquired	4874.237	Direct
2022-02-15	Common Stock	F	856	$152.55	Disposed	4018.237	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2022-02-15	Restricted Stock Unit	$	M	1171	Disposed		Common Stock (1171)	Direct
2022-02-15	Restricted Stock Unit	$	M	1161	Disposed		Common Stock (1161)	Direct
2022-02-15	Restricted Stock Unit	$	M	580	Disposed		Common Stock (580)	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 three equal annual installments commencing on February 15, 2021, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F4: These RSUs were subject to performance criteria, the achievement of which was determined on January 21, 2022, and thereafter vest in three equal annual installments beginning on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F5: These RSUs vest in three equal annual installments commencing on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.