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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1168195	Sourcefire Inc	FIRE	Services-Computer Processing & Data Preparation (7374)	522289365

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1392156	M Thomas Mcdonough	C/O Sourcefire, Inc. 9770 Patuxent Woods Drive Columbia MD 21046	President And Coo	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2011-02-28	1,093	$26.06	76,260	No	4	S	Direct
Common Stock	Disposition	2011-03-01	2,765	$27.01	73,495	No	4	S	Direct
Common Stock	Disposition	2011-03-01	20,102	$25.84	0	No	4	S	Indirect	By family trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct
No	4	S	Indirect	By family trust

Footnotes

Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $25.70 to $26.07 per share. The reporting person undertakes to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
Shares were held by The Revocable Trust of Thomas Michael McDonough u/a July 19, 2005, Thomas M. McDonough, Trustee. The reporting person has voting and investment control with respect to the shares held by the trust.