Active Power (ACPW)
ADA-ES, Inc. (ADES)
Advanced Battery Technologies, Inc. (ABAT)
Akeena Solar Inc. (AKNS)
American Superconductor Corp. (AMSC)
Ascent Solar Technologies, Inc. (ASTI)
Ballard Power Systems, Inc. (BLDP)
Beacon Power (BCON)
C&D Technologies (CHP)
Calgon Carbon Corp. (CCC)
Capstone Turbine (CPST)
Cereplast, Inc. (CERP)
China Hydroelectric Corp. (CHC)
China Integrated Energy, Inc. (CBEH)
China Recycling Energy Corp. (CREG)
Comverge, Inc. (COMV)
Darling International (DAR)
DayStar Technologies (DSTI)
Distributed Energy (DESC)
Electro Energy (EEEI)
Energy Conversion Devices, Inc. (ENER)
Energy Recovery Inc. (ERII)
EnerNOC, Inc. (ENOC)
EnerSys (ENS)
Evergreen Solar (ESLR)
First Solar, Inc. (FSLR)
FuelCell Energy, Inc. (FCEL)
GC China Turbine Corp. (GCHT)
GT Solar International Inc. (SOLR)
Hong Kong Highpower Technology, Inc. (HPJ)
Hydrogenics (HYGS)
Intermagnetics General (IMGC)
Magma Energy Corp. (MXY:CN)
Maxwell Technologies (MXWL)
Mechanical Technology (MKTY)
Medis Technologies (MDTL)
Metabolix, Inc. (MBLX)
Millennium Cell (MCEL)
Nova Biosource Fuels (NBF)
Opcon AB (OPCO.SS)
Opcon AB (OPCO:SS)
Ovation Products (private water filtration company)
Pacific Ethanol (PEIX)
Plug Power (PLUG)
PNE Wind AG (PNE3:GR)
Power-One, Inc. (PWER)
Quantum Fuel Systems (QTWW)
Renegy Holdings, Inc. (RNGY)
REpower Systems AG (RPW:GR)
RINO International Corp. (RINO)
S.A.G. Solarstrom AG (SAG:GR)
SatCon Technologies (SATC)
SFC Energy AG (F3C:GR)
Singulus Technologies AG (SNG: GR)
Smart Fuel Cell AG (F3C.GR)
SolarEnertech (SOEN)
Solarfun Power Holdings Co. (SOLF)
SunPower Corp. (SPWRA)
Suntech Power Holdings Co Ltd (STP)
TIR Systems (TIR)
Trina Solar Ltd. (TSL)
Ultralife Corporation (ULBI)
Universal Display Corp. (PANL)
Veolia Energy North America (VE)
Vycon (private flywheel company)
Westinghouse Solar (WEST)
Zenergy Power (ZEN.L)