1. Air Liquide S.A.
2. Air Products and Chemicals Inc.
3. Ally Hi-Tech Co. Ltd.
4. AquaHydrex Inc.
5. Ballard Power Systems Inc.
6. Caloric Anlagenbau GmbH
7. Claind S.r.l.
8. Cummins Inc.
9. Enapter S.r.l.
10. ErreDue SpA
11. FuelCell Energy Inc.
12. Hiringa Energy Limited
13. HyGear
14. Hyster-Yale Materials Handling Inc.
15. Iwatani Corporation
16. Linde PLC
17. Mahler AGS GmbH
18. McPhy Energy S.A.
19. Messer Se & Co. KGaA
20. Nel ASA
21. NewHydrogen Inc.
22. Nippon Sanso Holdings Corporation
23. Plug Power Inc.
24. Proton Energy Systems Inc.
25. Teledyne Energy Systems Inc.
26. Xebec Adsorption Inc.