0001127602-12-026293.txt : 20120914 0001127602-12-026293.hdr.sgml : 20120914 20120914090436 ACCESSION NUMBER: 0001127602-12-026293 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20120913 FILED AS OF DATE: 20120914 DATE AS OF CHANGE: 20120914 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: HANLEY PETER CENTRAL INDEX KEY: 0001185717 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 121091337 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MKS INSTRUMENTS INC CENTRAL INDEX KEY: 0001049502 STANDARD INDUSTRIAL CLASSIFICATION: INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823] IRS NUMBER: 042277512 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 2 TECH DRIVE STREET 2: SUITE 201 CITY: ANDOVER STATE: MA ZIP: 01810 BUSINESS PHONE: 978-645-5500 MAIL ADDRESS: STREET 1: 2 TECH DRIVE STREET 2: SUITE 201 CITY: ANDOVER STATE: MA ZIP: 01810 4 1 form4.xml PRIMARY DOCUMENT X0306 4 2012-09-13 0001049502 MKS INSTRUMENTS INC MKSI 0001185717 HANLEY PETER 2 TECH DRIVE ANDOVER MA 01810 1 Common Stock 2012-09-13 4 S 0 4000 27.518 D 16222 D This transaction was executed in multiple trades at prices ranging from $27.34 to $27.65 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. /s/Renee M. Donlan POA 2012-09-14