MKS INC — Director's Dealing 2015

Feb 19, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2015-02-17

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

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-02-17	Restricted Stock Unit	$	A	6382.979	Acquired		Common Stock (6382.979)	Direct
2015-02-17	Restricted Stock Unit	$	A	4255.319	Acquired		Common Stock (4255.319)	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 are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments commencing on the first anniversary of the grant date, with the exception of RSUs granted on or after February 15, 2015, in which case, the annual vesting date shall be (i) February 15th or (ii) the next business day if February 15th is not a business day.

F3: These RSUs vest in three equal annual installments commencing on the first anniversary of the grant date, with the exception of RSUs granted on or after February 15, 2015, in which case, the annual vesting date shall be (i) February 15th or (ii) the next business day if February 15th is not a business day.