In business, William Rawn Associates, long a mainstay on the Architect 50, landed the top spot. Learn more about how the firm's six-project-at-a-time rule helped it rise through the ranks.

In sustainability, ZGF Architects took top honors, besting last year's winner, EYP. Read more about ZGF's big year here.

In design, Marlon Blackwell Architects edged out Studio Gang and last year's top firm, NADAAA, for the number one spot. Discover what impressed the design judges about Marlon Blackwell's portfolio here.

Visit our methodology to see how we computed the rankings. Or check out the overall list of the Top 50 firms.