SOURCEFIRE, INC.  AMENDED AND RESTATED 2007 EMPLOYEE STOCK PURCHASE PLAN
  Purpose .
 Definitions .
  Administrator 
  Applicable Laws 
  Board 
  Code 
  Common Stock 
  Company 
  Compensation 
  Corporate Transaction 
     1




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 Designated Parents or Subsidiaries 
  Effective Date 
  Employee 
  Enrollment Date 
  Exchange Act 
  Exercise Date 
  Fair Market Value 
     Offer Period 
  Parent 
  Participant 
 2




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 Plan 
  Purchase Price 
  Reserves 
  Subsidiary 
 Eligibility .
 General .
 Limitations on Grant and Accrual .
 Other Limits on Eligibility .
 Offer Periods .
    3




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Participation .
 Exhibit A
  Payroll Deductions .
     Grant of Option .
 Exercise of Option .
 4




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Delivery.
 Withdrawal; Termination of Employment .
   Interest .
 Stock .
  5




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Administration .
 Designation of Beneficiary .
   Transferability .
 Use of Funds .
 Reports .
 6




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Adjustments Upon Changes in Capitalization; Corporate Transactions .
 Adjustments Upon Changes in Capitalization .
 Corporate Transactions . either
    Amendment or Termination .
   7




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Notices .
 Conditions Upon Issuance of Shares .
 Term of Plan .
 Stockholder Approval .
 No Employment Rights .
 No Effect on Retirement and Other Benefit Plans .
 Effect of Plan .
 Governing Law .
 Dispute Resolution .
 8




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Exhibit A
 Sourcefire, Inc. 2007 Employee Stock Purchase Plan
SUBSCRIPTION AGREEMENT   o o November 15, 20  o May 15, 20
 Personal Information
 Legal Name (Please Print)(Last)
    
    (First)
    
    (MI)
    
    
    
    Location
    
    DepartmentStreet AddressDaytime TelephoneCity, State/Country, ZipE-Mail AddressSocial Security No. __ __ __ 
    
    __ __  __ __ __ __
    
    Employee I.D. No.Manager
    
    Mgr. Location
 Eligibility
 Definitions
 Subscription
 Payroll Deduction Authorization
 Percentage to be Deducted (circle one)
    
    
    1
    %
    
    
    2
    %
    
    
    3
    %
    
    
    4
    %
    
    
    5
    %
    
    
    6
    %
    
    
    7
    %
    
    
    8
    %
    
    
    9
    %
    
    
    10
    %
 ESPP Accounts and Purchase Price
 Withdrawal and Changes in Payroll Deduction
 A-1




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Perpetual Subscription
 Taxes
 Dispute Resolution
 Designation of Beneficiary
 o o
 Beneficiary (please print)
    
    
    
    
    
    
    
    
    
    Relationship to Beneficiary (if any)(Last)
    
    (First)
    
    (MI)Street AddressCity, State/Country, Zip
 Termination of ESPP
 Date:
    
    
    
    Employee Signature:spouses signature (if beneficiary is other than spouse)
 A-2




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Exhibit BSourcefire, Inc. 2007 Employee Stock Purchase Plan
CHANGE OF STATUS NOTICE
 
 
 o Withdrawal From ESPP
  o Withdrawal and Purchase of Common Stock
  o Withdrawal Without Purchase of Common Stock
  o Change in Payroll Deduction
  Percentage to be Deducted (circle one)
    
    
    1
    %
    
    
    2
    %
    
    
    3
    %
    
    
    4
    %
    
    
    5
    %
    
    
    6
    %
    
    
    7
    %
    
    
    8
    %
    
    
    9
    %
    
    
    10
    %
  Change of Beneficiary
    
    o I am single
    
    o I am married
  Beneficiary (please print)
    
    
    
    
    
    
    
    
    
    Relationship to Beneficiary (if any)(Last)
    
    (First)
    
    (MI)Street AddressCity, State/Country, Zip
 Date:
    
    
    
    Employee Signature:spouses signature
(if beneficiary is
other than spouse)