FOR IMMEDIATE RELEASE

F5 to Present at Barclays Capital and Sterne Agee Conferences

SEATTLE, May 21, 2012

F5 Networks, Inc. (NASDAQ: FFIV), the global leader in Application Delivery Networking, today announced that company management will participate in the Barclays Capital Global Technology, Media and Telecommunications Conference at the Sheraton New York Hotel & Towers, 811 Seventh Avenue, and the Sterne Agee Technology Conference at Sentry Centers, 730 Third Avenue, both in New York, N.Y.

F5's presentation at the Barclays Capital conference will begin at 2:15 p.m. ET on Wednesday, May 23. The presentation at the Sterne Agee conference will begin at 10:15 a.m. ET on Thursday, May 24. F5 representatives for both conferences will include Jim Ritchings, VP, Business Development, and John Rodriguez, EVP and Chief Accounting Officer.

Direct links to live webcasts will be available at www.f5.com/about/investor-relations/events-calendar.html and archived copies of both will be accessible through June 22, 2012.

About F5 Networks

F5 Networks, Inc., the global leader in Application Delivery Networking (ADN), helps the world’s largest enterprises and service providers realize the full value of virtualization, cloud computing, and on-demand IT. F5^® solutions help integrate disparate technologies to provide greater control of the infrastructure, improve application delivery and data management, and give users seamless, secure, and accelerated access to applications from their corporate desktops and smart devices. An open architectural framework enables F5 customers to apply business policies at “strategic points of control” across the IT infrastructure and into the public cloud. F5 products give customers the agility they need to align IT with changing business conditions, deploy scalable solutions on demand, and manage mobile access to data and services. Enterprises, service and cloud providers, and leading online companies worldwide rely on F5 to optimize their IT investments and drive business forward. For more information, go to www.f5.com.

You can also follow @f5networks on Twitter or visit us on Facebook for more information about F5, its partners, and technology. For a complete listing of F5 community sites, please visit www.f5.com/news-press-events/web-media/community.html.

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