MKS INC — Director's Dealing 2020

Feb 19, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2020-02-18

Reporting Person: COLELLA GERARD G (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-02-18	Common Stock	M	7260.921	—	Acquired	7260.921	Direct
2020-02-18	Common Stock	F	3221	$113.87	Disposed	4039.921	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-02-18	Restricted Stock Unit	$	M	7260.921	Disposed		Common Stock (7260.921)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	40800	Indirect
Common Stock	50748	Indirect

Footnotes

F1: Each restricted stock unit 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 are subject to the achievement of performance criteria determined in the first year of grant. These RSUs vest on February 18, 2020.