MKS INC — Director's Dealing 2016

Apr 5, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2016-04-04

Reporting Person: Abrams John R (Sr. VP, Global Sales & Service)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-04-04	Common Stock	M	1502.889	—	Acquired	8928.176	Direct
2016-04-04	Common Stock	F	488	$37.85	Disposed	8440.176	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-04-04	Restricted Stock Unit	$	M	1502.889	Disposed		Common Stock (1502.889)	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: The RSUs vest in equal annual installments over three years from the respective original grant date.