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F5's expansion at 501 Elliott Avenue West

They may soon have to call it the F5 corridor. F5 Networks is expanding its presence along Elliott Avenue West on Seattle’s waterfront, announcing today that it plans to take over 40,000 square feet of office space that it had previously sublet to Cell Therapeutics.

Meanwhile, Cell Therapeutics announced today it plans to move to 66,000 square feet of space in Martin Selig’s 3101 Western building this Spring.

F5 Networks, which makes software and hardware products that speed the delivery of applications over the Internet, has been on a significant growth path in recent months. The company topped $1 billion in revenue in 2011. It now employs more than 2,600 people worldwide. (1,060 of those employees are in Washington state).

“F5 will be using the space for future expansion, as the company has experienced over 30 percent growth in our global employee count since October 2010,” said a company spokeswoman.

Previously on GeekWireF5 shares jump after revenues surge 19.9% to $322 million

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