0001127602-23-028639.txt : 20231204 0001127602-23-028639.hdr.sgml : 20231204 20231204101758 ACCESSION NUMBER: 0001127602-23-028639 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231201 FILED AS OF DATE: 20231204 DATE AS OF CHANGE: 20231204 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Moloney Jacqueline F CENTRAL INDEX KEY: 0001501968 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 231461599 MAIL ADDRESS: STREET 1: 222 MERRIMACK STREET CITY: LOWELL STATE: MA ZIP: 01852 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 2023-12-01 0001049502 MKS INSTRUMENTS INC MKSI 0001501968 Moloney Jacqueline F C/O MKS INSTRUMENTS, INC. 2 TECH DRIVE, SUITE 201 ANDOVER MA 01810 1 1 Common Stock 2023-12-01 4 S 0 250 82.23 D 11328.434 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 30, 2023. /s/ M. Kathryn Rickards, attorney-in-fact 2023-12-04