Manila Electric Company (MERALCO)
Visayan Electric Company (VECO)
Davao Light and Power Company, Inc. (DLPC)
National Grid Corporation of the Philippines (NGCP)
Albay Power and Energy Corporation (APEC)
Cagayan II Electric Cooperative Inc (CAGELCO II)
Tarlac I Electric Cooperative, Inc. (TARELCO 1)
Bohol Light Company, Inc. (BLCI)
Pangasinan Electric Cooperative I (PANELCO 1)
Pangasinan III Electric Cooperative, Inc. (PANELCO 3)
Subic Enerzone Corporation (SEZ)
Benguet Electric Cooperative, Inc. (BENECO)
National Power Corporation (NPC)
Peninsula Electric Cooperative, Inc. (PENELCO)
Cagayan Electric Power & Light Co., Inc. (CEPALCO)
Camarines Sur IV Electric Cooperative, Inc. (CASURECO IV)
Camarines Sur 1 Electric Cooperative Inc. (CASURECO I)
Bohol I Electric Cooperative (BOHECO I)
Cotabato Light & Power Company, Inc. (CLPC)
Energy Development Corporation (EDC)
Iligan Light & Power Inc. (ILPI)
Megapower Construction and Communications Incorporated
Batangas II Electric Cooperative Inc.
Ilocos Sur Electric Cooperative, Inc. (ISECO)
Tarlac Electric Inc.
Cagayan Electric Cooperative, Inc.
Tarlac II Electric Cooperative Inc.
San Fernando Electric Light and Power Inc.