<SEC-DOCUMENT>0000950170-23-030520.txt : 20230628
<SEC-HEADER>0000950170-23-030520.hdr.sgml : 20230628
<ACCEPTANCE-DATETIME>20230628214827
ACCESSION NUMBER:		0000950170-23-030520
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230628
DATE AS OF CHANGE:		20230628

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:		231054095

	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:			CEP IV Participations, S.a r.l. SICAR
		CENTRAL INDEX KEY:			0001944424
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			N4
		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>0001944424</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>CEP IV Participations S.a r.l., SICAR</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
<relationshipsToIssuer>
<relationshipToIssuer>Former 10% stockholder</relationshipToIssuer>
</relationshipsToIssuer>
</issuerInfo>
<securitiesInformation>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<brokerOrMarketmakerDetails>
<name>J.P. Morgan Securities LLC</name>
<address>
<street1 xmlns="http://www.sec.gov/edgar/common">383 Madison Avenue</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">10179</zipCode>
</address>
</brokerOrMarketmakerDetails>
<noOfUnitsSold>266393</noOfUnitsSold>
<aggregateMarketValue>28570649.25</aggregateMarketValue>
<noOfUnitsOutstanding>66767385</noOfUnitsOutstanding>
<approxSaleDate>06/28/2023</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>Issuer</nameOfPersonfromWhomAcquired>
<isGiftTransaction>N</isGiftTransaction>
<amountOfSecuritiesAcquired>2259743</amountOfSecuritiesAcquired>
<paymentDate>08/17/2022</paymentDate>
<natureOfPayment>Share exchange</natureOfPayment>
</securitiesToBeSold>
<nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
<securitiesSoldInPast3Months>
<sellerDetails>
<name>CEP IV Participations, S.a r.l. SICAR</name>
<address>
<street1 xmlns="http://www.sec.gov/edgar/common">c/o The Carlyle Group</street1>
<street2 xmlns="http://www.sec.gov/edgar/common">2, Avenue Charles de Gaulle</street2>
<city xmlns="http://www.sec.gov/edgar/common">Luxembourg</city>
<stateOrCountry xmlns="http://www.sec.gov/edgar/common">N4</stateOrCountry>
<zipCode xmlns="http://www.sec.gov/edgar/common">L-1653</zipCode>
</address>
</sellerDetails>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<saleDate>05/08/2023</saleDate>
<amountOfSecuritiesSold>532787</amountOfSecuritiesSold>
<grossProceeds>45886280.38</grossProceeds>
</securitiesSoldInPast3Months>
<securitiesSoldInPast3Months>
<sellerDetails>
<name>CEP IV Participations, S.a r.l. SICAR</name>
<address>
<street1 xmlns="http://www.sec.gov/edgar/common">c/o The Carlyle Group</street1>
<street2 xmlns="http://www.sec.gov/edgar/common">2, Avenue Charles de Gaulle</street2>
<city xmlns="http://www.sec.gov/edgar/common">Luxembourg</city>
<stateOrCountry xmlns="http://www.sec.gov/edgar/common">N4</stateOrCountry>
<zipCode xmlns="http://www.sec.gov/edgar/common">L-1653</zipCode>
</address>
</sellerDetails>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<saleDate>06/01/2023</saleDate>
<amountOfSecuritiesSold>532786</amountOfSecuritiesSold>
<grossProceeds>51552373.36</grossProceeds>
</securitiesSoldInPast3Months>
<noticeSignature>
<noticeDate>06/28/2023</noticeDate>
<signature>CEP IV Participations, S.a r.l. SICAR, By: /s/ Estelle Beyl Vodouhe, Manager and authorized signatory</signature>
</noticeSignature>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
