1. Alstom S.A.
2. ANDRITZ AG
3. Babcock & Wilcox Enterprises Inc.
4. Bilfinger Noell GmbH
5. Burns & McDonnell Inc.
6. CECO Environmental Corp.
7. DEC Engineering & Constructions Pvt. Ltd.
8. Doosan Power Systems
9. Ducon Infratechnologies Limited
10. ELEX (India) Pvt. Ltd.
11. ERG Group
12. FLSmidth & Co. A/S
13. Fuel Tech Inc.
14. General Electric Company
15. H+H Engineering & Service GmbH
16. Haldor Topsoe A/S
17. Hitachi Zosen Inova AG
18. Isgec Heavy Engineering Ltd.
19. Mitsubishi Heavy Industries Ltd.
20. PREMATECNICA
S.A.
21. Runh Power
22. Steinmuller Engineering GmbH
23. Tri-Mer Corporation
24. Umicore
25. Yara International ASA