1. Ansaldo Energia S.p.A.
2. Baker Hughes Company
3. Bechtel Corporation
4. Bharat Heavy Electricals Limited
5. Capstone Green Energy Corporation
6. Centrax Limited
7. Doosan Enerbility Co. Ltd.
8. Elliott Group
9. Flowserve Corporation
10. General Electric Company
11. Harbin Electric Corporation co.Ltd
12. Hitachi
Ltd.
13. Kawasaki Heavy Industries
Ltd.
14. MAN Energy Solutions SE
15. Mitsubishi Heavy Industries
Ltd.
16. Siemens AG