Sourcefire Inc.

Columbia, Md. • 410-290-1616 • www.sourcefire.com

Exchange and Ticker: Nasdaq: FIRE

Filing Range: 5.32M shares @ $12.00 to $14.00

Offering Price: $15.00

Close on First Day: $15.49

Offering Size: $86.60M

Shares Outstanding: 23,113,892

Underwriter: Morgan Stanley

Co-managers: Lehman Brothers/ UBS Investment Bank/ Jefferies & Co. Inc.

Company Counsel: Morrison & Foerster

Manager Counsel: Latham & Watkins

Auditor: Ernst & Young LLP

Market Capitalization on 3/31/07: $407.27M

Close price at current month end: $17.62

DESCRIPTION

Provides network security solutions. Company develops and offers solutions that provide real-time detection of improper activity, including attacks, threats and improper violations. Competitors include Internet Security Systems, Cisco Systems Inc., McAfee Inc., Symantec Corp., Juniper Networks, 3Com Corp. and Check Point Software Technologies

VENTURE BACKERS

Core Capital Partners, Inflection Point Ventures, Maryland Dept. of Business & Economic Development, Meritech Capital Partners, New Enterprise Associates, Sequoia Capital, Sierra Ventures.

Source: Thomson Financial