<SEC-DOCUMENT>0002100121-26-000457-index.html : 20260429
<SEC-HEADER>0002100121-26-000457.hdr.sgml : 20260429
<ACCEPTANCE-DATETIME>20260429140840
ACCESSION NUMBER:		0002100121-26-000457
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20260429
DATE AS OF CHANGE:		20260429

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MKS INC
		CENTRAL INDEX KEY:			0001049502
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				042277512
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-58011
		FILM NUMBER:		26913910

	BUSINESS ADDRESS:	
		STREET 1:		2 TECH DRIVE
		CITY:			ANDOVER
		STATE:			MA
		ZIP:			01810
		BUSINESS PHONE:		978-645-5500

	MAIL ADDRESS:	
		STREET 1:		2 TECH DRIVE
		CITY:			ANDOVER
		STATE:			MA
		ZIP:			01810

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MKS INSTRUMENTS INC
		DATE OF NAME CHANGE:	19971112

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VANGUARD PORTFOLIO MANAGEMENT LLC
		CENTRAL INDEX KEY:			0002100121
		ORGANIZATION NAME:           	
		EIN:				392888838
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231
		LEGAL ENTITY IDENTIFIER:    	529900YN99W7NU4H6B84

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		100 VANGUARD BLVD
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355
		BUSINESS PHONE:		610-669-6148

	MAIL ADDRESS:	
		STREET 1:		100 VANGUARD BLVD
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>