<SEC-DOCUMENT>0000319201-18-000010-index.html : 20180202
<SEC-HEADER>0000319201-18-000010.hdr.sgml : 20180202
<ACCEPTANCE-DATETIME>20180201184022
ACCESSION NUMBER:		0000319201-18-000010
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		6
FILED AS OF DATE:		20180202
DATE AS OF CHANGE:		20180201
EFFECTIVENESS DATE:		20180202

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-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-222827
		FILM NUMBER:		18568141

	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>S-3ASR
<SEQUENCE>1
<FILENAME>forms-3asr2018.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: forms-3asr2018.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>wsgropinionforms-3asr.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: wsgropinionforms-3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-13.1
<SEQUENCE>3
<FILENAME>ratioofearningstofixedchar.htm
<DESCRIPTION>EXHIBIT 13.1
<TEXT>
Document 3 - file: ratioofearningstofixedchar.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>pwcconsents-3asr.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 4 - file: pwcconsents-3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-25.1
<SEQUENCE>5
<FILENAME>wellsfargot-1.htm
<DESCRIPTION>EXHIBIT 25.1
<TEXT>
Document 5 - file: wellsfargot-1.htm

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

</DOCUMENT>
</SEC-DOCUMENT>