MKS INC — Director's Dealing 2020

Dec 7, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2020-12-04

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-12-04	Common Stock	M	249	—	Acquired	19537.59	Direct
2020-12-04	Common Stock	M	277	—	Acquired	19814.59	Direct
2020-12-04	Common Stock	F	526	$151.71	Disposed	19288.59	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-12-04	Restricted Stock Unit	$	M	249	Disposed		Common Stock (249)	Direct
2020-12-04	Restricted Stock Unit	$	M	277	Disposed		Common Stock (277)	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 2019 RSU Award accelerated to satisfy FICA taxes.

F4: Portion of 2020 RSU Award accelerated to satisfy FICA taxes.