1. AeroDelft
2. AeroVironment Inc.
3. Airbus SE
4. Alaka’i Technologies
5. Apus Group
6. Doosan Mobility Innovation
7. GKN Aerospace Services Limited
8. H2FLY GmbH
9. HES Energy Systems
10. Honeywell International Inc.
11. Intelligent Energy Limited
12. Lockheed Martin Corporation
13. L’AIR LIQUIDE S.A.
14. MagniX
15. Pipistrel D.O.O
16. Plug Power Inc.
17. Protonex by Ballard Power Systems Inc.
18. Rolls-Royce PLC
19. Shanghai Pearl Hydrogen Energy Technology Co. Ltd.
20. Siemens AG
21. Thales Group
22. The Boeing Company
23. Urban Aeronautics Ltd.
24. Wright Electric
25. Zeroavia Inc.