FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 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 Name and Ticker or Trading Symbol
KLA TENCOR CORP [klac] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Vice President
(Last)
(First)
(Middle)
,  		3. Date of Earliest Transaction (Month/Day/Year)
05/22/2003
(Street)

,    		4. If Amendment, Date Original Filed(Month/Day/Year)
05/27/2003		 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 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

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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
FORTINO DENNIS J


,    		      Executive Vice President  

Signatures

 Dennis J. Fortino   06/25/2003
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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).
(1) Transaction Originally Reported on 5/27/2003 Form 4 Filing
(2) Table I Non-Derivative Securities Beneficially Owned, not reported on original Form 4 Filing Title of Security Amount of Securities Ownership Form Common Stock 4,713 Direct
(3) Table II-Derivative Securities Beneficially Owned, not reported on original Form 4 Title of Derivative Exercise Price Expiration Title Shares Ownership NQSO $10.63 08/31/08 Common Stock 4,667 Direct NQSO $26.25 11/10/10 Common Stock 15,750 Direct NQSO $29.31 10/02/11 Common Stock 45,000 Direct NQSO $32.75 04/04/11 Common Stock 22,500 Direct NQSO $33.75 10/27/09 Common Stock 60,000 Direct NQSO $34.67 01/28/13 Common Stock 25,000 Direct NQSO $37.05 11/08/12 Common Stock 12,500 Direct NQSO $44.6875 08/11/10 Common Stock 5,370 Direct NQSO $44.6875 08/13/10 Common Stock 39,630 Direct

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