MKS INC — Director's Dealing 2013

Jun 4, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2013-05-31

Reporting Person: Lee John Tseng-Chung (Sr. VP, HPS, Controls & PFMC)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-31	Common Stock	P	520.4	$20.417	Acquired	520.4	Direct

Footnotes

F1: This purchase is a result of participation in the MKS Employee Stock Purchase Plan.