<SEC-DOCUMENT>0000950170-23-018877.txt : 20230508
<SEC-HEADER>0000950170-23-018877.hdr.sgml : 20230508
<ACCEPTANCE-DATETIME>20230508164512
ACCESSION NUMBER:		0000950170-23-018877
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230508
DATE AS OF CHANGE:		20230508

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:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	000-23621
		FILM NUMBER:		23898425

	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

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Gamma Holding Co Ltd
		CENTRAL INDEX KEY:			0001944422
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144

	BUSINESS ADDRESS:	
		STREET 1:		C/O THE CARLYLE GROUP
		STREET 2:		1001 PENNSYLVANIA AVENUE, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20004
		BUSINESS PHONE:		(251) 300-6657

	MAIL ADDRESS:	
		STREET 1:		C/O THE CARLYLE GROUP
		STREET 2:		1001 PENNSYLVANIA AVENUE, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20004
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<headerData>
<submissionType>144</submissionType>
<filerInfo>
<filer>
<filerCredentials>
<cik>0001944422</cik>
<ccc>XXXXXXXX</ccc>
</filerCredentials>
</filer>
<liveTestFlag>LIVE</liveTestFlag>
</filerInfo>
</headerData>
<formData>
<issuerInfo>
<issuerCik>0001049502</issuerCik>
<issuerName>MKS Instruments, Inc.</issuerName>
<secFileNumber>000-23621</secFileNumber>
<issuerAddress>
<street1 xmlns="http://www.sec.gov/edgar/common">2 Tech Drive</street1>
<street2 xmlns="http://www.sec.gov/edgar/common">Suite 201</street2>
<city xmlns="http://www.sec.gov/edgar/common">Andover</city>
<stateOrCountry xmlns="http://www.sec.gov/edgar/common">MA</stateOrCountry>
<zipCode xmlns="http://www.sec.gov/edgar/common">01810</zipCode>
</issuerAddress>
<issuerContactPhone>978-645-5500</issuerContactPhone>
<nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Gamma Holding Company Limited</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
<relationshipsToIssuer>
<relationshipToIssuer>Owner</relationshipToIssuer>
</relationshipsToIssuer>
</issuerInfo>
<securitiesInformation>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<brokerOrMarketmakerDetails>
<name>Barclays Capital Inc.</name>
<address>
<street1 xmlns="http://www.sec.gov/edgar/common">745 7th Ave</street1>
<city xmlns="http://www.sec.gov/edgar/common">New York</city>
<stateOrCountry xmlns="http://www.sec.gov/edgar/common">NY</stateOrCountry>
<zipCode xmlns="http://www.sec.gov/edgar/common">10019</zipCode>
</address>
</brokerOrMarketmakerDetails>
<noOfUnitsSold>245902</noOfUnitsSold>
<aggregateMarketValue>21767245.04</aggregateMarketValue>
<noOfUnitsOutstanding>66767385</noOfUnitsOutstanding>
<approxSaleDate>05/08/2023</approxSaleDate>
<securitiesExchangeName>NASDAQ</securitiesExchangeName>
</securitiesInformation>
<securitiesToBeSold>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<acquiredDate>08/17/2022</acquiredDate>
<natureOfAcquisitionTransaction>Acquired upon exchange of common shares of Atotech Limited for per share consideration of cash and shares of Common Stock of the issuer.</natureOfAcquisitionTransaction>
<nameOfPersonfromWhomAcquired>Acquired directly from issuer</nameOfPersonfromWhomAcquired>
<isGiftTransaction>N</isGiftTransaction>
<amountOfSecuritiesAcquired>1042959</amountOfSecuritiesAcquired>
<paymentDate>08/17/2022</paymentDate>
<natureOfPayment>Share exchange</natureOfPayment>
</securitiesToBeSold>
<nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
<noticeSignature>
<noticeDate>05/08/2023</noticeDate>
<signature>Gamma Holding Company Limited, By: /s/ Chintan Bhatt, Director</signature>
</noticeSignature>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
