ZGF Architects has always ranked high in the Architect 50, but this is the year the Portland, Ore.–based firm finally broke through, wresting the number one spot away from last year’s winner, Adrian Smith + Gordon Gill Architecture. ZGF was also the top firm in the sustainability category; read a review of the firm’s big year. William Rawn Associates, a mainstay on the list, was number one in the business category. Discover how the firm had such a profitable year. And Marlon Blackwell Architects topped the design category; read more about why the judges loved the firm’s portfolio.

Proving that smaller firms can compete with the multinationals, Hastings Architecture Associates and Brooks + Scarpa Architects both cracked the Top 10 overall.

Discover who else had a banner 2015: Check out the top 50 firms in business, sustainability, and design. Review our refined methodology (we made the most significant changes to the sustainability category). And review some of the key data submitted by the top 50 firms.