0001127602-23-028822.txt : 20231205 0001127602-23-028822.hdr.sgml : 20231205 20231205144005 ACCESSION NUMBER: 0001127602-23-028822 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231201 FILED AS OF DATE: 20231205 DATE AS OF CHANGE: 20231205 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: BAGSHAW SETH H CENTRAL INDEX KEY: 0001192439 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 231466195 ISSUER: 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 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 4 1 form4.xml PRIMARY DOCUMENT X0508 4 2023-12-01 0001049502 MKS INSTRUMENTS INC MKSI 0001192439 BAGSHAW SETH H C/O MKS INSTRUMENTS, INC. 2 TECH DRIVE, SUITE 201 ANDOVER MA 01810 1 EVP, CFO & Treasurer 0 Common Stock 2023-12-01 4 M 0 349 A 21021.668 D Common Stock 2023-12-01 4 M 0 350 A 21371.668 D Common Stock 2023-12-01 4 F 0 699 84.19 D 20672.668 D Restricted Stock Unit 2023-12-01 4 M 0 349 D Common Stock 349 27012.175 D Restricted Stock Unit 2023-12-01 4 M 0 350 D Common Stock 350 26662.175 D Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc. Shares used to satisfy FICA taxes. Portion of 2022 RSU Award accelerated to satisfy FICA taxes. Portion of 2023 RSU Award accelerated to satisfy FICA taxes. /s/ M. Kathryn Rickards, attorney-in-fact 2023-12-05