0001127602-23-025067.txt : 20231003 0001127602-23-025067.hdr.sgml : 20231003 20231003143414 ACCESSION NUMBER: 0001127602-23-025067 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231002 FILED AS OF DATE: 20231003 DATE AS OF CHANGE: 20231003 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Mora Elizabeth CENTRAL INDEX KEY: 0001548935 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 231302759 MAIL ADDRESS: STREET 1: C/O MKS INSTRUMENTS, INC. STREET 2: 2 TECH DRIVE, SUITE 201 CITY: ANDOVER STATE: MA ZIP: 01810 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 X0508 4 2023-10-02 0001049502 MKS INSTRUMENTS INC MKSI 0001548935 Mora Elizabeth C/O MKS INSTRUMENTS, INC. 2 TECH DRIVE, SUITE 201 ANDOVER MA 01810 1 1 Common Stock 2023-10-02 4 S 0 250 87.15 D 17362.258 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 17, 2023. /s/ M. Kathryn Rickards, attorney-in-fact 2023-10-03