1. ABB Ltd.
2. Alstom SA
3. Ballard Power Systems Inc.
4. Caterpillar Inc.
5. Construcciones y Auxiliar de Ferrocarriles
S.A.
6. CRRC Corporation Limited
7. Cummins Inc.
8. Deutsche Bahn AG
9. East Japan Railway Company
10. Hitachi
Ltd.
11. Hyundai Motor Company
12. Kawasaki Heavy Industries
Ltd.
13. PATENTES TALGO S.L.U.
14. Rolls-Royce Holdings PLC
15. Siemens AG
16. Stadler Rail AG
17. Toshiba Corporation
18. Toyota Motor Corporation
19. Voith GmbH & Co. KGaA
20. Westinghouse Air Brake Technologies Corporation
21. ?KODA TRANSPORTATION
a. s.