"Engineering News-Record" compiles and publishes rankings of the largest construction and engineering firms annually, measured by gross revenues.The rankings include the largest 400 U.S. general contractors, the largest 500 U.S. design firms (architectural and engineering firms), the largest 600 U.S. specialty contractors, the largest 100 construction management firms, the largest 100 design-build firms, the largest 200 environmental engineering firms, the largest 40 program management firms, the largest 200 international design firms, and the largest 250 international contractors, based on general construction contracting export revenue—generated from projects outside each firm's respective home country, and the largest 250 Global Contractors, both publicly and privately held, based on total construction contracting revenue regardless of where the projects were located.