Clayco, Turner Construction, ARCO Construction Companies, Hensel Phelps, AECOM, Austin Industriesm, STO Building Group, Walbridge, Gray, and Haskell top Building Design+Construction's ranking of the nation's largest design-build construction firms for 2026, as reported in BD+C's 2026 Giants 400 Report.

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