<SEC-DOCUMENT>0001193125-19-024385-index.html : 20190131
<SEC-HEADER>0001193125-19-024385.hdr.sgml : 20190131
<ACCEPTANCE-DATETIME>20190131203725
ACCESSION NUMBER:		0001193125-19-024385
CONFORMED SUBMISSION TYPE:	S-4MEF
PUBLIC DOCUMENT COUNT:		7
<REFERENCE-462B>333-224982
FILED AS OF DATE:		20190131
DATE AS OF CHANGE:		20190131
EFFECTIVENESS DATE:		20190131

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KLA TENCOR CORP
		CENTRAL INDEX KEY:			0000319201
		STANDARD INDUSTRIAL CLASSIFICATION:	OPTICAL INSTRUMENTS & LENSES [3827]
		IRS NUMBER:				042564110
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		S-4MEF
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-229462
		FILM NUMBER:		19557459

	BUSINESS ADDRESS:	
		STREET 1:		ONE TECHNOLOGY DRIVE
		CITY:			MILPITAS
		STATE:			CA
		ZIP:			95035
		BUSINESS PHONE:		4088756000

	MAIL ADDRESS:	
		STREET 1:		ONE TECHNOLOGY DRIVE
		CITY:			MILPITAS
		STATE:			CA
		ZIP:			95035

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KLA INSTRUMENTS CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
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<TYPE>S-4MEF
<SEQUENCE>1
<FILENAME>d695932ds4mef.htm
<DESCRIPTION>S-4MEF
<TEXT>
Document 1 - file: d695932ds4mef.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>d695932dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: d695932dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>d695932dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 3 - file: d695932dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>4
<FILENAME>d695932dex232.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 4 - file: d695932dex232.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>5
<FILENAME>d695932dex992.htm
<DESCRIPTION>EX-99.2
<TEXT>
Document 5 - file: d695932dex992.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g695932g42x31.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g695932g42x31.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g695932g69u51.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g695932g69u51.jpg

</DOCUMENT>
</SEC-DOCUMENT>