0001959173-23-004119.txt : 20231002 0001959173-23-004119.hdr.sgml : 20231002 20231002104738 ACCESSION NUMBER: 0001959173-23-004119 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20231002 DATE AS OF CHANGE: 20231002 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: 231298308 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: Mora Elizabeth CENTRAL INDEX KEY: 0001548935 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O MKS INSTRUMENTS, INC. STREET 2: 2 TECH DRIVE, SUITE 201 CITY: ANDOVER STATE: MA ZIP: 01810 144 1 primary_doc.xml 144 0001548935 XXXXXXXX LIVE 0001049502 MKS INSTRUMENTS INC 000-23621 2 TECH DRIVE SUITE 201 ANDOVER MA 01810 978-645-5500 Mora Elizabeth Director Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

250 21787.50 66862788 10/02/2023 NASDAQ Common 05/10/2021 Restricted Stock Vesting Issuer N 250 05/10/2021 Compensation N Elizabeth Mora

2 Tech Drive Suite 201 Andover MA 01810

Common 07/03/2023 250 27122.50 10/02/2023 03/17/2023 /s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Elizabeth A. Mora