0001959173-23-003553.txt : 20230828 0001959173-23-003553.hdr.sgml : 20230828 20230828172830 ACCESSION NUMBER: 0001959173-23-003553 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230828 DATE AS OF CHANGE: 20230828 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: 231217326 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 23813.75 66862788 08/28/2023 NASDAQ Common 05/10/2021 Restricted Stock Vesting Issuer N 250 05/10/2021 Compensation N Jacqueline F. Moloney

2 Tech Drive Suite 201 Andover MA 01810

Common 06/01/2023 225 21861.00 08/28/2023 /s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Jacqueline F Moloney