0001127602-12-023906.txt : 20120807 0001127602-12-023906.hdr.sgml : 20120807 20120807135342 ACCESSION NUMBER: 0001127602-12-023906 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20120806 FILED AS OF DATE: 20120807 DATE AS OF CHANGE: 20120807 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Lee John Tseng-Chung CENTRAL INDEX KEY: 0001414656 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 121012496 MAIL ADDRESS: STREET 1: 90 INDUSTRIAL WAY CITY: WILMINGTON STATE: MA ZIP: 01887 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 2012-08-06 0001049502 MKS INSTRUMENTS INC MKSI 0001414656 Lee John Tseng-Chung 2 TECH DRIVE ANDOVER MA 01810 1 Sr. VP, Controls & PFMC Common Stock 2012-08-06 4 S 0 2868 26.673 D 0.001 D This transaction was executed in multiple trades at prices ranging from $26.60 to $26.73. 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 2012-08-07