MKS INC — Director's Dealing 2021

Apr 22, 2021

SEC Form 4/A — Form 4/A

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2021-04-13

Reporting Person: Gitin Mark Milton (SVP & GM, L&M Division)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-13	Common Stock	F	317	$186.52	Disposed	4733.054	Direct

Footnotes

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

F2: The original Form 4 filed on April 14, 2021 (the "Original Form 4"), is hereby amended solely to correct an error in the number of shares of common stock of MKS Instruments, Inc. that were withheld from the reporting person for the payment of tax liabilities. Please note that the 70 additional shares that should have been reported as withheld for the payment of tax liabilities on the Original Form 4 were included in the reporting person's holdings in a subsequent Form 4 filed on April 21, 2021. The reporting person will exclude these shares from the reporting person's holdings in future filings.