The 700,577-square-foot office tower that’s under construction in downtown Seattle landed a big new tenant. F5 Networks is set to move its corporate headquarters from Elliott Avenue West into the new building at 801 Fifth Ave. in early 2019, as soon as the tenant improvement build-out is completed.
The tech company announced last week it has signed a lease agreement for 516,000 square feet of office space across floors 20 through 48. A 189-key, Philippe Starck-designed luxury hotel will occupy the lower floors of the building. As part of the deal, the office structure will change its name from The Mark into F5 Tower to honor its new tenant.