<SEC-DOCUMENT>0001193125-18-287459-index.html : 20180928
<SEC-HEADER>0001193125-18-287459.hdr.sgml : 20180928
<ACCEPTANCE-DATETIME>20180928161905
ACCESSION NUMBER:		0001193125-18-287459
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20180928
DATE AS OF CHANGE:		20180928
EFFECTIVENESS DATE:		20180928

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:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-09992
		FILM NUMBER:		181094395

	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>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d605000ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d605000ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g605000page001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g605000page001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g605000page002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g605000page002.jpg

</DOCUMENT>
</SEC-DOCUMENT>