1. Ballard Power
2. Basf
3. Bloom Energy
4. Doosan Corporation
5. Gannon & Scott
6. Hensel Recycling
7. Hytechcyling
8. Johnson Matthey
9. Klein Anlagenbau
10. Proton Motor Fuel Cell
11. Plug Power Inc
12. Sk Ecoplant
13. Suez
14. Tenova
15. Umicore