MKS INC — Director's Dealing 2021

Sep 17, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2021-09-16

Reporting Person: Schreiner James Alan (Sr. VP & COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-09-16	Common Stock	M	1434	—	Acquired	3727.181	Direct
2021-09-16	Common Stock	F	454	$150.50	Disposed	3273.181	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-09-16	Restricted Stock Unit	$	M	1434	Disposed		Common Stock (1434)	Direct

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 vest in three equal annual installments commencing on September 16, 2020, provided that if, in any vesting year, September 16th is not a business day, such vesting shall occur on the next business day.