<SEC-DOCUMENT>0001193125-19-106368-index.html : 20190415
<SEC-HEADER>0001193125-19-106368.hdr.sgml : 20190415
<ACCEPTANCE-DATETIME>20190415145002
ACCESSION NUMBER:		0001193125-19-106368
CONFORMED SUBMISSION TYPE:	8-K/A
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20190201
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20190415
DATE AS OF CHANGE:		20190415

FILER:

	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:		8-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23621
		FILM NUMBER:		19748370

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K/A
<SEQUENCE>1
<FILENAME>d706926d8ka.htm
<DESCRIPTION>8-K/A
<TEXT>
Document 1 - file: d706926d8ka.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>d706926dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: d706926dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>3
<FILENAME>d706926dex993.htm
<DESCRIPTION>EX-99.3
<TEXT>
Document 3 - file: d706926dex993.htm

</DOCUMENT>
</SEC-DOCUMENT>