What are the famous construction companies in America?

American Som Architectural Design Consulting Co., Ltd. American KPF Architectural Design Firm American HOK International Architectural Design Firm American JY Architectural Planning and Design Firm American KDG Architectural Design Co., Ltd. American SWA Company American HLW International Architectural Design Firm American JWDA Architectural Design Firm American HPA Haibo Architectural Design Firm American BWH Harvard Architects Company American AY International Architectural Design Group.