1. Clyde Bergemann Power Group
2. Mitsubishi Hitachi Power Systems
3. Babcock & Wilcox Enterprises Inc.
4. Clyde Bergemann Power Group
5. STT Environ Corp
6. Andritz AG
7. Marsulex Environmental Technologies
8. Bilfinger Engineering & Technologies Gmbh
9. Chiyoda Corporation
10. Ducon Technologies and Fuel Tech Inc.