1. Ballard Power Systems Inc.
2. Bloom Energy Corporation
3. Ceres Power Holdings Plc
4. Doosan Fuel Cell Co. Ltd.
5. Ecospray Technologies S.r.l.
6. FuelCell Energy
Inc
7. Fuji Electric Co. Ltd.
8. Panasonic Corp.
9. Plug Power Inc.
10. SFC Energy AG
11. Toshiba Energy Systems