    <SEC-DOCUMENT>0001437749-17-016184-index.html : 20170921
    <SEC-HEADER>0001437749-17-016184.hdr.sgml : 20170921
    <ACCEPTANCE-DATETIME>20170921161139
    ACCESSION NUMBER:		0001437749-17-016184
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		8
    CONFORMED PERIOD OF REPORT:	20171101
    FILED AS OF DATE:		20170921
    DATE AS OF CHANGE:		20170921
    EFFECTIVENESS DATE:		20170921

    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:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-09992
    		FILM NUMBER:		171095913

    	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>DEF 14A
    <SEQUENCE>1
    <FILENAME>klac20170918_def14a.htm
    <DESCRIPTION>FORM DEF 14A
    <TEXT>
    Document 1 - file: klac20170918_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>img2.jpg
    <TEXT>
    Document 2 - file: img2.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>img.jpg
    <TEXT>
    Document 3 - file: img.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>klac20170918_def14aimg004.jpg
    <TEXT>
    Document 4 - file: klac20170918_def14aimg004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>check.jpg
    <TEXT>
    Document 5 - file: check.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>klac20170918_def14aimg003.jpg
    <TEXT>
    Document 6 - file: klac20170918_def14aimg003.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>klac20170918_def14aimg002.jpg
    <TEXT>
    Document 7 - file: klac20170918_def14aimg002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>klac20170918_def14aimg001.jpg
    <TEXT>
    Document 8 - file: klac20170918_def14aimg001.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>