1. ABB Ltd.
2. Alstom S.A.
3. Ansaldo Energia S.p.A
4. Arani power systems
5. Bharat Heavy Electricals Limited
6. Chola Turbo Machinery International Pvt. Ltd.
7. Dongfang Turbine Company Limited
8. Doosan ?koda Power
9. Elliott Group
10. Fuji Electric Co. Ltd.
11. General Electric Company
12. Hangzhou Turbine Power Group Co. Ltd.
13. Howden Group
14. Kawasaki Heavy Industries
Ltd.
15. MAN Energy Solutions SE
16. Mitsubishi Heavy Industries
Ltd.
17. Shin Nippon Machinery Co. Ltd
18. Siemens AG
19. Sumitomo Heavy Industries
Ltd.
20. Toshiba Corporation
21. Trillium Flow Technologies
22. Turbine Generator Maintenance Inc.
23. TURBOCAM Inc.
24. WEG S.A.