MKS INC — Director's Dealing 2020

Jan 28, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2020-01-27

Reporting Person: COLELLA GERARD G (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-01-27	Restricted Stock Unit	$	A	21782.763	Acquired		Common Stock (21782.763)	Direct

Footnotes

F1: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F2: These RSUs were subject to performance criteria, achievement of which was determined on January 27, 2020. On January 1, 2020, Mr. Colella retired as Chief Executive Officer of the Company. Pursuant to the terms of his restricted stock unit agreement governing this award, upon retirement, all of these RSUs will vest on February 18, 2020 but only 7,260.921 shares will be distributed on this date. The remaining shares are subject to Section 409A of the Internal Revenue Code and will be distributed on July 2, 2020.