0001959173-23-002957.txt : 20230807 0001959173-23-002957.hdr.sgml : 20230807 20230807105843 ACCESSION NUMBER: 0001959173-23-002957 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230807 DATE AS OF CHANGE: 20230807 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: 231146142 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: Burke Kathleen Flaherty CENTRAL INDEX KEY: 0001775435 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: MKS INSTRUMENTS, INC., 2 TECH DRIVE STREET 2: SUITE 201 CITY: ANDOVER STATE: MA ZIP: 01810 144 1 primary_doc.xml 144 0001775435 XXXXXXXX LIVE 0001049502 MKS INSTRUMENTS INC 000-23621 2 TECH DRIVE SUITE 201 ANDOVER MA 01810 978-645-5500 Burke Kathleen Flaherty Officer Common Fidelity Brokerage Services LLC

900 Salem St Smithfield RI 02917

6186 625304.01 66862788 08/07/2023 NASDAQ Common 02/15/2021 Restricted Stock Vesting Issuer N 4885 02/15/2021 Compensation Common 05/28/2021 ESPP Purchase Issuer N 89 05/28/2021 Cash Common 10/28/2021 Restricted Stock Vesting Issuer N 1212 10/28/2021 Compensation Y 08/07/2023 /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Kathleen F. Burke