Turner Construction, STO Building Group, Whiting-Turner Contracting, DPR Construction, HITT Contracting, Hensel Phelps, and Holder Construction top Building Design+Construction's ranking of the nation's largest general contractors, CM at risk firms, and design-builders for nonresidential buildings and multifamily buildings work, as reported in BD+C's 2026 Giants 400 Report.

For more AEC discipline rankings, check out:

• Top 400 Building Design Firms (includes all A, AE, E, EA firms)
• Top 200 Architecture Firms
• Top 90 Architecture Engineering (AE) Firms 
• Top 80 Engineering Firms
• Top 40 Engineering/Architecture (EA) Firms  
• Top 80 Construction Management Firms

Source: Building Design+Construction's 2026 Giants 400 Report