Company:  KLA TENCOR CORP (KLAC)
Form Type:  10-K
Filing Date:  8/7/2009 
CIK:  0000319201 
Address:  160 RIO ROBLES 
City, State, Zip:  SAN JOSE, California 95134 
Telephone:  (408) 434-4200 
Fiscal Year:  06/30 
Last Trade
Last Trade: 
$31.89  
Change: 
-0.25 (-0.78%)  
Trade Time: 
Nov 20  
Market Cap: 
$5.45B
Description of Business
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  FORM 10-K
    PART I
      ITEM 1. BUSINESS
      ITEM 1A. RISK FACTORS
      ITEM 1B. UNRESOLVED STAFF COMMENTS
      ITEM 2. PROPERTIES
      ITEM 3. LEGAL PROCEEDINGS
      ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
    PART II
      ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED ...
      ITEM 6. SELECTED FINANCIAL DATA
        INCOME STATEMENT
      ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
        BENEFICIAL OWNERS
        BENEFICIAL OWNERS
        Liquidity and Capital Resources
      ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
        BALANCE SHEET
        INCOME STATEMENT
        STOCKHOLDERS EQUITY
        CASH FLOW
        Notes to Consolidated Financial Statements
          BALANCE SHEET
          INCOME STATEMENT
          BALANCE SHEET
          NOTE 20-SUBSEQUENT EVENTS
        NOTE 21-QUARTERLY CONSOLIDATED RESULTS OF OPERATIONS (UNAUDITED)
        REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
      ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ...
      ITEM 9A. CONTROLS AND PROCEDURES
      ITEM 9B. OTHER INFORMATION
    PART III
      ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
      ITEM 11. EXECUTIVE COMPENSATION
      ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND ...
      ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND ...
      ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES
    PART IV
      ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULE
    SIGNATURES
    VALUATION AND QUALIFYING ACCOUNTS
    EXHIBIT INDEX
  EXHIBIT 12.1
    RATIO COMPUTATION
  EXHIBIT 21.1
    SUBSIDIARIES
  EXHIBIT 23.1
    Consent of Independent Registered Public Accounting Firm
  EXHIBIT 31.1
    Certification of Chief Executive Officer
  EXHIBIT 31.2
    Certification of Chief Financial Officer
  EXHIBIT 32
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER