FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Titinger Jorge
 2. Date of Event Requiring Statement (Month/Day/Year)
12/21/2006		 3. Issuer Name and Ticker or Trading Symbol
KLA TENCOR CORP [KLAC]
(Last)
(First)
(Middle)
C/O KLA-TENCOR CORPORATION, 160 RIO ROBLES		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP, Chief Admin. Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAN JOSE, CA 95130		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock-Restricted Stock Units 37,600
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy) 01/28/2004 01/28/2013 Common Stock 35,000 $ 34.67 D  
Non-Qualified Stock Option (right to buy) 09/16/2006 09/16/2014 Common Stock 19,500 $ 39.34 D  
Non-Qualified Stock Option (right to buy) 10/27/2004 08/02/2014 Common Stock 1,200 $ 40.66 D  
Non-Qualified Stock Option (right to buy) 10/27/2004 04/26/2014 Common Stock 2,000 $ 45.16 D  
Non-Qualified Stock Option (right to buy) 09/26/2006 09/26/2012 Common Stock 17,000 $ 47.95 D  
Non-Qualified Stock Option (right to buy) 10/27/2004 10/27/2013 Common Stock 3,200 $ 53.86 D  
Non-Qualified Stock Option (right to buy) 10/27/2004 01/27/2014 Common Stock 1,600 $ 58.1 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Titinger Jorge
C/O KLA-TENCOR CORPORATION
160 RIO ROBLES
SAN JOSE, CA 95130		       SVP, Chief Admin. Officer  

Signatures

By: Jeffrey Hall For: Jorge Titinger 01/05/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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