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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities
Exchange Act of 1934 (Amendment No.  )
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SOURCEFIRE, INC.
 
(Name of Registrant as Specified In Its Charter)
 
 
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
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*** Exercise Your Right to Vote ***
Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on May 26, 2011

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SOURCEFIRE, INC.
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    Meeting Information
Meeting Type: Annual Meeting

For holders as of: March 28, 2011

Date: May 26, 2011              Time: 10:00 AM EDT
Location:   Courtyard by Marriott Columbia

8910 Stanford Boulevard

Columbia, MD 21045
You are receiving this communication because you hold shares in the above named company.
This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).
We encourage you to access and review all of the important information contained in the proxy materials before voting.
See the reverse side of this notice to obtain proxy materials and voting instructions.
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— Before You Vote —
How to Access the Proxy Materials
Proxy Materials Available to VIEW or RECEIVE:
1. Notice & Proxy Statement      2. Annual Report
How to View Online:
Have the information that is printed in the box marked by the arrow è XXXX XXXX XXXX   (located on the following page) and visit: www.proxyvote.com.
How to Request and Receive a PAPER or E-MAIL Copy:
If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:
1) BY INTERNET:
  www.proxyvote.com
2) BY TELEPHONE:
  1-800-579-1639
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Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before May 12, 2011 to facilitate timely delivery.
      


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— How To Vote —
Please Choose One of the Following Voting Methods
Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.
Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow è XXXX XXXX XXXX   available and follow the instructions.
Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

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Voting items
The Board of Directors recommends you vote
FOR the following:
  1.   Election of Directors
Nominees
01    John C. Burris            02    Tim A. Guleri            03    Martin F. Roesch
The Board of Directors recommends you vote FOR the following proposal:
  2   Advisory vote on executive compensation.
The Board of Directors recommends you vote 3 YEARS on the following proposal:
  3   Advisory vote on frequency of advisory vote on executive compensation.
The Board of Directors recommends you vote FOR the following proposal:
  4   Ratification of the selection of Ernst & Young LLP as independent auditors of the Company for its fiscal year ending December 31, 2011.
NOTE: Such other business as may properly come before the meeting or any adjournment thereof.
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NAME
        
           
 
THE COMPANY NAME INC. — COMMON
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THE COMPANY NAME INC. — CLASS A
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THE COMPANY NAME INC. — CLASS B
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THE COMPANY NAME INC. — CLASS C
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THE COMPANY NAME INC. — CLASS D
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THE COMPANY NAME INC. — CLASS E
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THE COMPANY NAME INC. — CLASS F
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THE COMPANY NAME INC. — 401 K
     123,456,789,012.12345  
           
 
 
           
 
 
    Broadridge Internal Use Only  
 
 
        
 
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