MKS INC — Director's Dealing 2014

Mar 24, 2014

SEC Form 4/A — Form 4/A

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2014-02-10

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

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-02-10	Restricted Stock Unit	$	A	36157.025	Acquired		Common Stock (36157.025)	Direct

Footnotes

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

F2: This filing amends the total performance based RSU grant for 2014 from 44,765.840, which was originally reported in error, to 36,157.025.

F3: These RSUs are subject to the achievement of performance criteria determined in the first year of the grant and thereafter vests in equal annual installments over three years.