1. 2G Energy AG
2. ABB Ltd.
3. Alfa Laval AB
4. ATCO Ltd.
5. Axiom Energy Group
LLC
6. BDR Thermea Group B.V.
7. Cain Industries
8. Capstone Green Energy Corporation
9. Caterpillar Inc.
10. Centrica PLC
11. Clarke Energy Limited by Kohler Co.
12. Cummins Inc.
13. Curtis Power Solutions
LLC by Indel Power Group Company
14. Enexor Energy LLC
15. FuelCell Energy Inc.
16. General Electric Company
17. MAN Energy Solutions SE
18. Mitsubishi Heavy Industries
Ltd.
19. Ricardo PLC
20. Robert Bosch GmbH
21. Rolls-Royce PLC
22. Schneider Electric SE
23. Siemens AG
24. Tecogen Inc.
25. Veolia Environnement SA
26. Viessmann Werke GmbH & Co. KG
27. W?rtsil? Corporation
28. Yanmar Holdings Co. Ltd.