1. Voith GmbH & Co. KGaA
2. Andritz Hydro GmbH
3. GE Hydro Power
4. lstom
5. Siemens AG
6. Litostroj Power Group
7. Harbin Hydropower Equipment Co. Ltd.
8. Dongfang Electric Machinery Co. Ltd.
9. Canyon Hydro
10. Cornell Pump Company