STO Building Group, Barton Malow, DPR Construction, Turner Construction, Hensel Phelps, Gilbane Building Company, and The Boldt Company top Building Design+Construction's ranking of the nation's largest integrated project delivery (IPD) construction firms for 2026, as reported in BD+C's 2026 Giants 400 Report.

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