0001127602-13-019186.txt : 20130604 0001127602-13-019186.hdr.sgml : 20130604 20130604104755 ACCESSION NUMBER: 0001127602-13-019186 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20130531 FILED AS OF DATE: 20130604 DATE AS OF CHANGE: 20130604 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 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: 13890038 MAIL ADDRESS: STREET 1: 90 INDUSTRIAL WAY CITY: WILMINGTON STATE: MA ZIP: 01887 4 1 form4.xml PRIMARY DOCUMENT X0306 4 2013-05-31 0001049502 MKS INSTRUMENTS INC MKSI 0001414656 Lee John Tseng-Chung 2 TECH DRIVE ANDOVER MA 01810 1 Sr. VP, HPS, Controls & PFMC Common Stock 2013-05-31 4 P 0 520.4 20.417 A 520.4 D This purchase is a result of participation in the MKS Employee Stock Purchase Plan. /s/Renee M. Donlan POA 2013-06-04