1. AE&E Lentjes
2. AECOM Technology Corporation
3. Andritz AG
4. Babcock & Wilcox Enterprises Inc.
5. Bilfinger SE
6. Burns & McDonnell
7. China Boqi Environmental Protection (Holding) Co.Ltd
8. China Everbright Environment Group Ltd
9. Chiyoda Corporation
10. Ducon Infratechnologies Limited
11. Fuel Tech Inc
12. General Electric Company
13. Hamon Technologies LLP
14. Hitachi Zosen Inova Steinm?ller GmbH
15. John Wood Group PLC
16. Kawasaki Heavy Industries
Ltd.
17. LAB
18. Macrotek Inc.
19. Marsulex Environmental Technologies by KraftPowercon Sweden AB
20. Mitsubishi Heavy Industries
Ltd.
21. Pepperl+Fuchs SE
22. Rafako S.A.
23. Shandong Mingsheng Environmental Protection Technology Co.Ltd
24. Siemens AG
25. Thermax Limited
26. Topsoe A/S
27. Valmet Oyj