ABB Ltd.
Mitsubishi Heavy Industries Ltd.
Thales Group
Siemens AG
Alstom SA
American Equipment Company
Beijing Traffic Control Technology
Bombardier Transportation
Construcciones y Auxiliar de Ferrocarriles (CAF)
CRCC Corporation Limited
General Electric
Hitachi Rail STS
Ingeteam Corporation SA
Kawasaki Heavy Industries
Westinghouse Air Brake Technologies Corporation