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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5
obligations may continue.
1. Name and Address of Reporting Person(s)
Campagna, John Peter
12233 Menalto Drive
.
.
Los Altos Hills, CA 94022
2. Issuer Name and Ticker or Trading Symbol
KLA-Tencor Corporation (KLAC)
3. I.R.S. Identification Number of Reporting Person, if an entity (Voluntary)
4. Statement for Month/Day/Year
05/02/2003
5. If Amendment, Date of Original (Month/Day/Year)
6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
[ ] Director [ ] 10% Owner
[X] Officer (give title below) [ ] Other (specify below)
Vice President and Treasurer
7. Individual or Joint/Group Filing (Check Applicable Line)
[X] Form filed by One Reporting Person
[ ] Form filed by More than One Reporting Person
Table I Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
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1)Title of Security 2)Trans- 3.Trans- 4.Securities Acquired(A) 5)Amount of 6) 7)Nature of
action action or Disposed of (D) Securities Indirect
Date Code A Beneficially D Beneficial
(Month/ or Owned at or Ownership
Day/Year) Code V Amount D Price End of Month I
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Common Stock 05/02/03 M 5,850 A $29.3100 D Direct
Common Stock 05/02/03 S 5,850 D $41.8390 0 D Direct
Table II (PART 1) Derivative Securities Acquired, Disposed of, or Beneficially
Owned (Columns 1 through 6)
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1)Title of Derivative 2)Conversion 3)Trans- 4)Trans- 5)Number of Derivative 6)Date Exercisable and
Security or Exercise action action Securities Acquired (A) Expiration Date
Price of Date Code or Disposed of (D)
Derivative
Security Code V A D Exercisable Expiration
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Non-Qualified Stock Option $29.3100 05/02/03 M 5,850 10/02/11
(right to buy)
Non-Qualified Stock Option $31.8125 12/22/10
(right to buy)
Non-Qualified Stock Option $34.6700 01/28/13
(right to buy)
Non-Qualified Stock Option $37.0500 11/08/12
(right to buy)
Table II (PART 2) Derivative Securities Acquired, Disposed of, or Beneficially
Owned (Columns 1,3 and 7 through 11)
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1)Title of Derivative 3)Trans- 7)Title and Amount 8)Price 9)Number of 10) 11)Nature of
Security action of Underlying of Deri- Derivative Indirect
Date Securities vative Securities D Beneficial
Amount or Security Beneficially or Ownership
Number of Owned at I
- Title Shares End of Month
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Non-Qualified Stock Option 05/02/03 Common Stock 5,850 13,650 D Direct
(right to buy)
Non-Qualified Stock Option Common Stock 16,730 16,730 D Direct
(right to buy)
Non-Qualified Stock Option Common Stock 6,500 6,500 D Direct
(right to buy)
Non-Qualified Stock Option Common Stock 3,250 3,250 D Direct
(right to buy)
Explanation of Responses:
SIGNATURE OF REPORTING PERSON
/S/ By: Stuart J. Nichols
For: John Peter Campagna
DATE 05/02/03