The listed Hongkong Electric group of companies are The Hongkong Electric Company Limited (HEC), Hongkong Electric International Limited (HEI), Associated Technical Services Limited (ATS); and some minor subsidiaries.
Power Assets Holdings Limited har flere børsnoterede datterselskaber: Hongkong Electric Company Limited (HEC), Hongkong Electric International Limited (HEI), Associated Technical Services Limited (ATS); og nogle mindre datterselskaber.