0001127602-23-015865.txt : 20230517 0001127602-23-015865.hdr.sgml : 20230517 20230517152057 ACCESSION NUMBER: 0001127602-23-015865 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230516 FILED AS OF DATE: 20230517 DATE AS OF CHANGE: 20230517 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Donahue Joseph B CENTRAL INDEX KEY: 0001413323 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 23931382 MAIL ADDRESS: STREET 1: 1050 WESTLAKES DRIVE CITY: BERWYN STATE: PA ZIP: 19312 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 X0407 4 2023-05-16 0001049502 MKS INSTRUMENTS INC MKSI 0001413323 Donahue Joseph B C/O MKS INSTRUMENTS, INC. 2 TECH DRIVE, SUITE 201 ANDOVER MA 01810 1 0 Common Stock 2023-05-16 4 A 0 2369.107 A 7249.609 D These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant). Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc. /s/ M. Kathryn Rickards, attorney-in-fact 2023-05-17