FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue.SeeInstruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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*
FORTINO DENNIS J
2. Issuer NameandTicker or Trading Symbol
KLA TENCOR CORP [klac]		 5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____导演 _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Vice President
(Last)
(First)
(Middle)
133 JACKSON STREET		 3. Date of Earliest Transaction (Month/Day/Year)
07/30/2003
(街)

LOS GATOS, CA 95032		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(检查适用线)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 07/30/2003 M 625 A $ 10.63 0(1) D
Common Stock 07/30/2003 S 625 D $ 51.28 0(1) D
Common Stock 07/30/2003 M 1,875 A $ 10.63 0(1) D
Common Stock 07/30/2003 S 1,875 D $ 51.28 0(1) D
Common Stock 07/30/2003 M 2,167 A $ 10.63 0(1) D
Common Stock 07/30/2003 S 2,167 D $ 51.28 0(1) D
Common Stock 07/30/2003 M 5,250 A $ 26.25 0(1) D
Common Stock 07/30/2003 S 5,250 D $ 51.28 0(1) D
Common Stock 07/30/2003 M 10,125 A $ 32.75 0(1) D
Common Stock 07/30/2003 S 10,125 D $ 51.28 0(1) D
Common Stock 07/30/2003 M 15,750 A $ 29.31 0(1) D
Common Stock 07/30/2003 S 15,750 D $ 51.28 4,713 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option $ 10.63 07/30/2003 M 625 08/31/1999 08/31/2008 Common Stock 625 $ 51.28 0(2) D
Non-Qualified Stock Option $ 10.63 07/30/2003 M 1,875 08/31/1999 08/31/2008 Common Stock 1,875 $ 51.28 0(2) D
Non-Qualified Stock Option $ 10.63 07/30/2003 M 2,167 08/31/1999 08/31/2008 Common Stock 2,167 $ 51.28 0(2) D
Non-Qualified Stock Option $ 26.25 07/30/2003 M 5,250 11/10/2001 11/10/2010 Common Stock 5,250 $ 51.28 10,500 D
Non-Qualified Stock Option $ 29.31 07/30/2003 M 15,750 10/02/2002 10/02/2011 Common Stock 15,750 $ 51.28 29,250 D
Non-Qualified Stock Option $ 32.75 07/30/2003 M 10,125 04/04/2002 04/04/2011 Common Stock 10,125 $ 51.28 12,375 D
Non-Qualified Stock Option $ 33.75 10/27/2000 10/27/2009 Common Stock 60,000 60,000 D
Non-Qualified Stock Option $ 34.67 11/08/2003 01/28/2013 Common Stock 25,000 25,000 D
Non-Qualified Stock Option $ 37.05 11/08/2003 11/08/2012 Common Stock 12,500 12,500 D
Non-Qualified Stock Option $ 40.14 05/22/2004 05/22/2013 Common Stock 1,000 1,000 D
Non-Qualified Stock Option $ 44.6875 08/13/2000 08/13/2010 Common Stock 5,370 5,370 D
Non-Qualified Stock Option $ 44.6875 08/13/2001 08/13/2010 Common Stock 39,630 39,630 D

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
FORTINO DENNIS J
133 JACKSON STREET
LOS GATOS, CA 95032		 Executive Vice President

Signatures

Dennis J. Fortino 07/30/2003
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person,seeInstruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations.See18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Amount of Securities Beneficially Owned Following All Reported Transactions is equal to 4,713 shares. This total is indicated on the last line on which a transaction is reported for Table I.
(2) All shares granted from this option have been exercised.

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