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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	Acquisiton	2013-03-12	200	$26.16	59,549	No	4	M	Direct
Common Stock	Disposition	2013-03-12	10,600	$57.82	48,949	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Disposition	2013-03-12	200	$0.00	200	$26.16

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
9,785		2018-03-07	No	4	M	Direct

Footnotes

Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $57.65 to $58.25 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.
The option vests over a period of four years, with 25% of the shares underlying the option vesting on March 7, 2012, the first anniversary of the date of grant, and the remainder vesting in 36 equal monthly installments thereafter.