0001127602-23-028820.txt : 20231205 0001127602-23-028820.hdr.sgml : 20231205 20231205143650 ACCESSION NUMBER: 0001127602-23-028820 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: Lee John Tseng-Chung CENTRAL INDEX KEY: 0001414656 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23621 FILM NUMBER: 231466185 MAIL ADDRESS: STREET 1: 90 INDUSTRIAL WAY CITY: WILMINGTON STATE: MA ZIP: 01887 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 0001414656 Lee John Tseng-Chung C/O MKS INSTRUMENTS, INC. 2 TECH DRIVE, SUITE 201 ANDOVER MA 01810 1 1 President & CEO 0 Common Stock 2023-12-01 4 M 0 390 A 78528.607 D Common Stock 2023-12-01 4 M 0 1186 A 79714.607 D Common Stock 2023-12-01 4 M 0 160 A 79874.607 D Common Stock 2023-12-01 4 M 0 569 A 80443.607 D Common Stock 2023-12-01 4 M 0 970 A 81413.607 D Common Stock 2023-12-01 4 F 0 3275 84.19 D 78138.607 D Restricted Stock Unit 2023-12-01 4 M 0 390 D Common Stock 390 80410.118 D Restricted Stock Unit 2023-12-01 4 M 0 1186 D Common Stock 1186 79224.118 D Restricted Stock Unit 2023-12-01 4 M 0 160 D Common Stock 160 79064.118 D Restricted Stock Unit 2023-12-01 4 M 0 569 D Common Stock 569 78495.118 D Restricted Stock Unit 2023-12-01 4 M 0 970 D Common Stock 970 77525.118 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 2021 RSU Award accelerated 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