4 1 4美国证券和交易所委员会华盛顿州，D.C.20549表格4有利所有权的变更陈述[]如果不再受第16条的影响，请选中此框。表明4或表格5义务可能会继续。1.报告人员姓名和地址，斯蒂芬P.306信标街单位没有。3 Boston，MA 02116 2.发行人姓名和贸易商或交易符号KLA-Tencor Corporation（KLAC）3. I.R.S.报告人的识别码，如实体（自愿）4.陈述月/日/年02/07/2003 5.如果修订，原始（月/日/年）的日期6.报告人员的关系发行人（检查全部适用）[x]董事[] 10％所有者[]官员（在下面给出标题）[]其他（指定下面）董事7.个人或联合/小组申请（检查适用的行）[x]表格提交由一个以上报告人提交的一个报告人[]表格

表我获得，处置，或有利地拥有的非衍生证券 - - - - - - - - - - - -------------------------------------------------------------------------------------------------------------------------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 - ------------------------------------------------------------------------------------------------------------------------------------ 普通股02/07/03 P 1,000 A $ 31.8300 1,000 D Direct

表II（第1部分）获得，处置，或有利地拥有的衍生证券（第1至6栏） - - - - - - - - --------------------------------------------------------------------------------------------------------------------------------------------------------------------------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 - ------------------------------------------------------------------------------------------------------------------------------------ 非合格股票期权$ 37.0500 11/08/12（购买权）

表II（第2部分）获得，处置或有利地拥有的衍生证券（专栏1,3和11） - - - - - - - ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------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 - ------------------------------------------------------------------------------------------------------------------------------------ 非合格的股票期权普通股10,000 10,000 d Direct（购买权） 答复解释：

报告人员签名/ s /乘坐：Stuart J. Nichols for：Stephen P. Kaufman日期02/07/03