• ABOITIZ POWER CORPORATION
• AHUNAN POWER, INC. 
• ALSONS ENERGY DEVELOPMENT CORPORATION
• ALTERNERGY MINI HYDRO HOLDINGS CORPORATION
• ANDRITZ HYDRO, INC. (REGISTERED as PHP PHILIPPINES HYDRO PROJECT INC.)
• CATUIRAN HYDROPOWER CORP.
• CLEAN RENEWABLE ENERGY SOLUTION PHILIPPINES, INC.
• CORDILLERA HYDRO ELECTRIC POWER CORP.
• DUMDUMA-BACOY POWER CORP.
• ENERVANTAGE SUPPLIERS CO., INC.
• ENGINEERING AND DEVELOPMENT CORPORATION OF THE PHILS. (EDCOP)
• FIRST GEN HYDRO POWER CORPORATION
• FIRST GEN MINDANAO HYDROPOWER CORPORATION
• GHD Pty Ltd
• GLOBAL HYDRO ENERGY GMBH
• GREGORIO ARANETA ENERGY HOLDINGS, Inc.
• HEDCOR, INC.
• HUNAN SINOPOWER EQUIPMENT CO., LTD
• INVESTCO BHPI, Inc.
• KRAH PIPES MANILA, INC
• MARKHAM RESOURCES CORPORATION
• MINDANAO ENERGY SYSTEMS, INC. (MINERGY)
• OLYMPIA VIOLAGO WATER AND POWER, INC. 
• SMITH BELL MINI-HYDRO CORPORATION
• SN-ABOITIZ POWER MAGAT
• STA. CLARA POWER CORPORATION
• TAFT HYDROENERGY CORP
• VOITH FIJI HYDRO K.K.’S PHIL BRANCH OFFICE