F5 Networks Named to FORTUNE’s List of 100 Fastest-Growing Companies

F5 Ranked 17^th among World’s Top Technology Companies for 2010

SEATTLE--(EON: Enhanced Online News)--F5 Networks, Inc. (NASDAQ: FFIV), the global leader in Application Delivery Networking (ADN), has been named one of the world’s fastest-growing companies, according to FORTUNE. F5 is ranked No. 64 among what FORTUNE calls “the world’s supercharged performers” on its 2010 list of 100 Fastest-Growing Companies. F5, the only company in its market space to make the list of 100, ranks No. 17 among the top technology companies.

“I believe our ability to thrive in today’s economic climate is due to the strategic value our solutions provide to customers—allowing them to respond quickly to change, scale their businesses online, reduce costs, and ultimately, to be more competitive.”

“It’s truly gratifying for F5 to be recognized by FORTUNE as one of the world’s fastest-growing companies,” said John McAdam, President and CEO of F5. “I believe our ability to thrive in today’s economic climate is due to the strategic value our solutions provide to customers—allowing them to respond quickly to change, scale their businesses online, reduce costs, and ultimately, to be more competitive.”

The following criteria was evaluated in determining FORTUNE’s list of 100 Fastest-Growing Companies: listing on a major U.S. stock exchange; filing quarterly reports with the SEC; a minimum market capitalization of $250 million and a stock price of at least $5 on June 30, 2010; and trading continuously since June 30, 2007. The company must also have revenue and net income of at least $50 million and $10 million, respectively, for the four quarters ended on or before April 30, 2010. Finally, the company must have posted an annualized growth in revenue and earnings per share of at least 15% annually over the three years ended on or before April 30, 2010.

The full list and related stories appear in the September 6, 2010 issue of FORTUNE, available on newsstands on Monday, August 23, and online at http://money.cnn.com/magazines/fortune/fortunefastestgrowing/2010/index.html.

F5 Networks is hiring. Please visit www.f5.com/about/careers/ for more information.

About FORTUNE

FORTUNE magazine is a global leader in business journalism with a domestic circulation of over 850,000 and a global readership of nearly 5 million, and major franchises including the FORTUNE 500 and the FORTUNE 100 Best Companies to Work For. FORTUNE Live Media extends the brand’s mission into live events, hosting a wide range of annual conferences, including FORTUNE’s Most Powerful Women and the FORTUNE Global Forum. FORTUNE publishes English-language editions in Europe and Asia, and local-language editions in China and South Korea. FORTUNE magazine’s online home is CNNMoney.com, which draws 5.7 million readers a month.

About F5 Networks

F5 Networks is the 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 the management of application, server, storage, and network resources, streamlining application delivery and reducing costs. Global enterprise organizations, service and cloud providers, and Web 2.0 content providers trust F5 to keep their business moving forward. For more information, go to www.f5.com.

F5 and F5 Networks are trademarks or service marks of F5 Networks, Inc., in the U.S. and other countries. All other product and company names herein may be trademarks of their respective owners.

This press release may contain forward-looking statements relating to future events or future financial performance that involve risks and uncertainties. Such statements can be identified by terminology such as "may," "will," "should," "expects," "plans," "anticipates," "believes," "estimates," "predicts," "potential," or "continue," or the negative of such terms or comparable terms. These statements are only predictions and actual results could differ materially from those anticipated in these statements based upon a number of factors including those identified in the company's filings with the SEC.