Company:  PROOFPOINT INC (PFPT)
Form Type:  424B4
Filing Date:  4/20/2012 
CIK:  0001212458 
Address:  892 ROSS DRIVE 
City, State, Zip:  SUNNYVALE, California 94089 
Telephone:  408-517-4710 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$18.45   		Change: 
0.04 (0.22%)  
Trade Time: 
May 17   		Market Cap: 
$628.63M
Description of Business
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  FORM 424B4
    TABLE OF CONTENTS
    PROSPECTUS SUMMARY
    The Offering
    Summary Consolidated Financial Information
    RISK FACTORS
    SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
    USE OF PROCEEDS
    DIVIDEND POLICY
    CAPITALIZATION
    DILUTION
      BENEFICIAL OWNERS
    SELECTED CONSOLIDATED FINANCIAL DATA
    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
      Operating Expenses
      Liquidity and Capital Resources
    BUSINESS
      Competition
      Employees
      Legal Proceedings
    MANAGEMENT
      NAME AND TITLE
      Compensation Committee Interlocks and Insider Participation
    Director Compensation
    EXECUTIVE COMPENSATION
      COMPENSATION TABLE
      OPTIONS
      2002 Stock Option/Stock Issuance Plan
    CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS
    Review, Approval or Ratification of Transactions With ...
    PRINCIPAL AND SELLING STOCKHOLDERS
      BENEFICIAL OWNERS
    DESCRIPTION OF CAPITAL STOCK
    Transfer Agent and Registrar
    SHARES ELIGIBLE FOR FUTURE SALE
    THE PRECEDING DISCUSSION OF UNITED STATES FEDERAL TAX ...
    UNDERWRITING
    LEGAL MATTERS
    EXPERTS
    WHERE YOU CAN FIND ADDITIONAL INFORMATION
    INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
      REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
        BALANCE SHEET
        INCOME STATEMENT
        STOCKHOLDERS EQUITY
        CASH FLOW
      Notes to Consolidated Financial Statements
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