1. AFC Energy plc
2. Altergy Systems
3. Ballard Power Systems Inc.
4. Bloom Energy Corporation
5. Cummins Inc.
6. Doosan Fuel Cell Co. Ltd.
7. Energy Observer SAS
8. Freudenberg FST GmbH
9. Gaussin Group
10. GenCell Ltd.
11. Generac Power Systems Inc.
12. H2X Global Limited
13. HELION by ALSTOM Hydrog?ne SAS
14. Honeywell International Inc.
15. Hydrologiq Ltd.
16. Nedstack Fuel Cell Technology BV
17. Panasonic Corporation
18. PowerCell Sweden AB
19. PowerUp Fuel Cells OU
20. Proton Motor Fuel Cell GmbH
21. SFC Energy AG
22. Siemens AG
23. TECO 2030 ASA
24. Toshiba Corporation