1. ALSTOM Holdings
2. AMETEK Inc.
3. ANDRITZ GROUP
4. Dongfang Electric Corporation
5. Doosan Enerbility Co. Ltd.
6. ETA Heiztechnik GmbH
7. General Electric Company
8. Harp Renewables
9. Hurst Boiler & Welding Co Inc.
10. Messersmith Manufacturing Inc.
11. Mitsubishi Heavy Industries (MHI) Group
12. Sigma Thermal Inc.
13. THERMODYNE ENGINEERING SYSTEMS
14. Treco Ltd.
15. WEISS