1. ABB Ltd.
2. ADE Power Ltd.
3. Aggreko UK Limited
4. AKSA Power Generation
5. Alterra Power Systems
6. Anderson Power Services
7. Atlas Copco AB
8. Black & Veatch Holding Company
9. Caterpillar Inc.
10. CK Power
11. Cummins Inc.
12. Data Centre Dynamics Ltd
13. DEUTZ Corporation
14. Enrogen Ltd.
15. Generac Power System Inc.
16. HITEC Power Protection BV
17. Kirloskar Oil Engines Limited
18. Kohler Co.
19. Langley Holdings PLC
20. Mitsubishi Heavy Industries
Ltd.
21. Rolls-Royce PLC
22. VIAVI Solutions Inc.
23. Woodstock Power Company
24. Yanmar Holdings Co. Ltd.