MKS INC — Director's Dealing 2021

Apr 21, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2021-04-19

Reporting Person: Gitin Mark Milton (SVP & GM, L&M Division)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-19	Common Stock	M	1797	—	Acquired	6600.054	Direct
2021-04-19	Common Stock	F	891	$181.04	Disposed	5709.054	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-04-19	Restricted Stock Unit	$	M	1797	Disposed		Common Stock (1797)	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 April 17, 2021, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.