1. ALACAES SA
2. Apex Compressed Air Energy Storage
LLC
3. Augwind Energy
4. Brayton Energy
LLC
5. Carnot Compression Inc.
6. Caterpillar Inc.
7. Cheesecake Energy Ltd.
8. Corre Energy B.V.
9. Czero Inc.
10. Doosan ?koda Power s.r.o.
11. Enairys Powertech
12. ENERGY DOME S.p.A.
13. General Electric Company
14. Green-Y Energy AG
15. Hydrostor Inc.
16. IFP Energies Nouvelles
17. Kobe Steel
Ltd.
18. Lige Pty Ltd.
19. MAN Energy Solutions SE
20. Mitsubishi Heavy Industries
Ltd.
21. PG&E Corporation
22. Ridge Energy Storage & Grid Services L.P.
23. Siemens AG
24. Storelectric Limited
25. TerraStor Energy Corporation