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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
1543194	John Negron	9770 Patuxent Woods Drive Columbia MD 21046	Svp, Worldwide Sales	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
Common Stock	Acquisiton	2012-04-05	12,501	$27.51	89,501	No	4	M	Direct
Common Stock	Disposition	2012-04-05	12,501	$47.62	77,000	No	4	S	Direct
Common Stock	Disposition	2012-04-09	5,305	$47.46	71,695	No	4	S	Direct
Common Stock	Disposition	2012-04-09	133	$46.95	71,562	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	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	2012-04-05	12,501	$0.00	12,501	$27.51

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
37,499		2018-04-04	No	4	M	Direct

Footnotes

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 16, 2011.
These sales were effected pursuant to a Rule 10b5-1 trading plan dated August 16, 2011 to satisfy tax obligations in connection with the sale of common stock.
The option vests over a period of four years, with 25% of the shares underlying the option vesting on April 5, 2012, the first anniversary of the date of grant, and the remainder vesting in 36 equal monthly installments thereafter, subject to the reporting person's continuous service with the issuer as of the applicable vesting date.