Sourcefire Named to Deloitte Technology Fast 500 List for Third Consecutive Year

National Award Recognizes the Fastest Growing Companies in North America

• Press Release
• Source: Sourcefire, Inc.
• On 9:01 am EDT, Thursday October 22, 2009

COLUMBIA, Md.--(BUSINESS WIRE)--Sourcefire, Inc. (Nasdaq:FIRE - News), a leader in Cybersecurity, today announced that the company has been selected for the third consecutive year to the Deloitte Technology Fast 500, this year ranking 348. The Deloitte Fast 500 program lists the fastest growing technology, media, telecommunications, life sciences and clean technology companies in North America based on their percentage revenue growth over a five-year period.

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Symbol	Price	Change
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Sourcefire^® achieved its ranking on this year’s Deloitte Technology Fast 500 based on its 353 percent growth from 2004 through 2008. Companies named to the list must own proprietary intellectual property or proprietary technology that contributes to a significant portion of the company’s operating revenues. In addition, companies must be headquartered in North America and have at least $50,000 in operating revenue in 2004 and at least $5 million in operating revenue in 2008.

“Over the past five years, Sourcefire has remained dedicated to delivering innovative solutions and addressing our customers’ evolving security requirements,” said Tom McDonough, President and COO at Sourcefire. “This commitment to delivering leading-edge solutions to address real-world needs has been the driving force behind Sourcefire’s significant growth and market penetration.”

Sourcefire is consistently recognized for its innovation and industry leadership with more than 50 awards and accolades to date. Most recently, Snort^® was named to InfoWorld’s Open Source Hall of Fame and was named Best IPS/IDS by the 2009 SC Magazine Awards. In addition, Sourcefire was recognized by Baltimore SmartCEO’s Future 50, which recognizes the region’s fastest growing companies and Martin Roesch was named one of eWeek’s Top 100 Most Influential People in IT. To view Sourcefire's awards, go to http://www.sourcefire.com/news/awards/

About Sourcefire

Sourcefire, Inc. (Nasdaq:FIRE - News), is a world leader in Cybersecurity solutions. Sourcefire is transforming the way Global 2000 organizations and government agencies manage and minimize network security risks. Sourcefire’s IPS and Real-time Adaptive Security solution equips customers with an efficient and effective layered security defense – protecting network assets before, during and after an attack. Through the years, Sourcefire has been consistently recognized for its innovation and industry leadership by customers, media and industry analysts alike – with more than 50 awards and accolades. Today, the names Sourcefire and founder Martin Roesch have grown synonymous with innovation and network security intelligence. For more information about Sourcefire, please visit http://www.sourcefire.com.

SOURCEFIRE®, SNORT®, the Sourcefire logo, the Snort and Pig logo, SECURITY FOR THE REAL WORLD™, SOURCEFIRE DEFENSE CENTER®, SOURCEFIRE 3D®, RNA®, RUA™, DAEMONLOGGER™, CLAMAV®, SOURCEFIRE SOLUTIONS NETWORK™, and certain other trademarks and logos are trademarks or registered trademarks of Sourcefire, Inc. in the United States and other countries. Other company, product and service names may be trademarks or service marks of others.

Media Contact:
Welz & Weisel Communications
Tony Welz, Principal
703-218-3555 x226
tony@w2comm.com
or
Investor Contact:
Sourcefire, Inc.
Tania Almond, Investor Relations Officer
410-423-1919
tania.almond@sourcefire.com