Kimley-Horn, AECOM, WSP, Thornton Tomasetti, Salas O'Brien, LANGAN, EXP, and IMEG head Building Design+Construction's ranking of the nation's largest apartment building and condominium engineering and engineering/architecture (EA) firms for 2026, as reported in BD+C's 2026 Giants 400 Report.

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