0001959173-24-001631.txt : 20240301 0001959173-24-001631.hdr.sgml : 20240301 20240301103322 ACCESSION NUMBER: 0001959173-24-001631 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240301 DATE AS OF CHANGE: 20240301 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] ORGANIZATION NAME: 08 Industrial Applications and Services 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: 24707806 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 ORGANIZATION NAME: 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 Street Smithfield RI 02917

7411 910737.79 67055404 03/01/2024 NASDAQ Common 02/15/2018 Restricted Stock Vesting Issuer N 2013 02/15/2018 Compensation Common 02/15/2021 Restricted Stock Vesting Issuer N 1 02/15/2021 Compensation Common 11/30/2021 ESPP Purchase Issuer N 67 11/30/2021 Cash Common 02/15/2022 Restricted Stock Vesting Issuer N 5330 02/15/2022 Compensation Y 03/01/2024 /s/ Ryan Riviere, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Kathleen F. Burke