<SEC-DOCUMENT>0001040188-23-000028-index.html : 20230202
<SEC-HEADER>0001040188-23-000028.hdr.sgml : 20230202
<ACCEPTANCE-DATETIME>20230202115647
ACCESSION NUMBER:		0001040188-23-000028
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230202
DATE AS OF CHANGE:		20230202

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:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-58011
		FILM NUMBER:		23579546

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VICTORY CAPITAL MANAGEMENT INC
		CENTRAL INDEX KEY:			0001040188
		IRS NUMBER:				132700161
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		15935 LA CANTERA PARKWAY
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78256
		BUSINESS PHONE:		2168982400

	MAIL ADDRESS:	
		STREET 1:		15935 LA CANTERA PARKWAY
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78256

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KEY ASSET MANAGEMENT INC/OH
		DATE OF NAME CHANGE:	19990325
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>mksinstruments13g_123122.htm
<TEXT>
Document 1 - file: mksinstruments13g_123122.htm

</DOCUMENT>
</SEC-DOCUMENT>