After months of speculation, Akerman—Florida’s largest law firm—announced it will move its Miami headquarters from downtown to a building under construction at the sprawling Brickell City Centre.

Akerman will lease 108,000 square feet on seven floors in one of two office buildings at the mixed-use complex being built by Hong Kong-based Swire Properties Ltd. in Miami’s financial district. Akerman, which will move next fall, will have top billing as the marquee tenant, taking 80 percent of the office space in a mixed-use building.