211 North Broadway Suite 600
Saint Louis
MO 63102
USA
Phone: +1 314.421.2000
Established by three principals and 26 employees in 1955, Hellmuth, Obata + Kassabaum (HOK), Inc. is now the second-largest architectural firm in the world as ranked by World Architecture magazine, January 2001. HOK offers integrated services to clients in various markets through our many locations worldwide.