0001959173-23-005096.txt : 20231201 0001959173-23-005096.hdr.sgml : 20231201 20231201110415 ACCESSION NUMBER: 0001959173-23-005096 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20231201 DATE AS OF CHANGE: 20231201 SUBJECT COMPANY: 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 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 231458020 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: COMPANY DATA: COMPANY CONFORMED NAME: Moloney Jacqueline F CENTRAL INDEX KEY: 0001501968 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 222 MERRIMACK STREET CITY: LOWELL STATE: MA ZIP: 01852 144 1 primary_doc.xml 144 0001501968 XXXXXXXX LIVE 0001049502 MKS INSTRUMENTS INC 000-23621 2 TECH DRIVE SUITE 201 ANDOVER MA 01810 978-645-5500 Moloney Jacqueline F Director Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

250 20557.50 66878495 12/01/2023 NASDAQ Common 05/09/2022 Restricted Stock Vesting Issuer N 250 05/09/2022 Compensation Y 12/01/2023 08/30/2023 /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Jacqueline F. Moloney