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FOR IMMEDIATE RELEASE

F5 Networks to Present at the Cowen & Co. 37th Annual Technology, Media and Telecom Conference and the Barclays 2009 Worldwide Wireless and Wireline Conference

SEATTLE, May 22, 2009

(BUSINESS WIRE) - F5 Networks, Inc. (NASDAQ: FFIV), the global leader in Application Delivery Networking, today announced that company management will participate in the Cowen & Co. 37th Annual Technology, Media and Telecom Conference on May 27 and the Barclays 2009 Worldwide Wireless and Wireline Conference on May 28. Both conferences will be held in New York, N.Y.

F5's Cowen & Co. presentation will begin at 10:15 a.m. ET on Wednesday, May 27 at The New York Palace Hotel (455 Madison Avenue). The company's Barclays presentation will begin at 10:15 a.m. ET on Thursday, May 28 at the Crowne Plaza Times Square Hotel (1605 Broadway at 49th Street).

F5 representatives for both conferences will include John McAdam, President and Chief Executive Officer, and Andy Reinland, SVP and Chief Finance Officer.

Interested viewers can go to www.f5.com/about/investor-relations/events-calendar.html to access a direct link to the webcasts for both presentations. Both webcasts will be accessible through June 28, 2009.

About F5 Networks

F5 Networks is a global leader in Application Delivery Networking (ADN), focused on ensuring the secure, reliable, and fast delivery of applications. F5's flexible architectural framework enables community-driven innovation that helps organizations enhance IT agility and dynamically deliver services that generate true business value. F5's vision of unified application and data delivery offers customers an unprecedented level of choice in how they deploy ADN solutions. It redefines how application, server, storage, and network resources are aligned and managed to streamline application delivery and reduce costs. Global enterprise organizations, service providers, and Web 2.0 content providers worldwide trust F5 to keep their business moving forward. For more information, go to www.f5.com.

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