MKS INC — Director's Dealing 2017

Dec 15, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2017-12-14

Reporting Person: COLELLA GERARD G (Director, CEO, President, Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-12-14	Common Stock	S	5000	$95.26	Disposed	56296	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5024.65	Direct

Footnotes

F1: This transaction was executed in multiple trades at prices ranging from $95.200 to $95.350. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.