A-Power Energy Generation Systems, Ltd. [APWR]
Active Power, Inc. [ACPW]
Allegheny Energy, Inc. [AYE]
American Electric Power Company, Inc. [AEP]

Beacon Power Corporation [BCON]
Black Hills Corporation [BKH]

Calpine Corporation [CPN]
Centrais Elétricas Brasileiras S.A. - ELETROBRÁS [EBR]
Central Vermont Public Service Corporation [CV]
China Nuvo Solar Energy, Inc. [CNUVE.OB]
Cleco Corporation [CNL]
CLP Holdings Limited [CLPHY.PK]
Companhia Energética de Minas Gerais - CEMIG [CIG]
Companhia Paranaense de Energia - COPEL [ELP]
Constellation Energy Group, Inc. [CEG]

Dominion Resources, Inc. [D]
DTE Energy Company [DTE]
Duke Energy Corporation [DUK]
Dynegy Inc. [DYN]

E.ON AG [EONGY.PK]
Edison International [EIX]
EDP - Energias de Portugal, S.A. [EDPFY.PK]
El Paso Electric Company [EE]
Emera Inc. [EMRAF.PK]
Empresa Distribuidora y Comercializadora Norte S.A. [EDN]
Endesa, S.A. [ELEYY.PK]
Enel S.p.A. [ENLAY.PK]
Entergy Corporation [ETR]
Environmental Power Corporation [EPG]
Evergreen Energy Inc. [EEE]

FirstEnergy Corp. [FE]
Fortis Inc. [FRTSF.PK]
FPL Group, Inc. [FPL]

Great Plains Energy Incorporated [GXP]

Hawaiian Electric Industries, Inc. [HE]
Hongkong Electric Holdings Limited [HGKGY.PK]

IBERDROLA, S.A. [IBDRY.PK]
IDACORP, Inc. [IDA]
ITC Holdings Corp. [ITC]

Maine & Maritimes Corporation [MAM]
MMC Energy, Inc. [MMCE]

NRG Energy, Inc. [NRG]
NSTAR [NST]

Ocean Power Technologies, Inc. [OPTT]
OGE Energy Corp. [OGE]
Ormat Technologies, Inc. [ORA]
Otter Tail Corporation [OTTR]

Pepco Holdings, Inc. [POM]
Pinnacle West Capital Corporation [PNW]
Portland General Electric Company [POR]
PPL Corporation [PPL]
Progress Energy, Inc. [PGN]

RRI Energy, Inc. [RRI]
RWE Aktiengesellschaft [RWEOY.PK]

Scottish and Southern Energy plc [SSEZY.PK]
Southern Company [SO]

TECO Energy, Inc. [TE]
The AES Corporation [AES]
The Empire District Electric Company [EDE]
TransAlta Corporation [TAC]

UIL Holdings Corporation [UIL]
UniSource Energy Corporation [UNS]

Xcel Energy Inc. [XEL]

ZBB Energy Corporation [ZBB]