Hongkong Electric Holdings Limited (HEH) is the holding company of The Hongkong Electric Company, Limited (HEC), Hongkong Electric International Limited (HEI) and Associated Technical Services Limited (ATS). The principal activity of the Company is investment holding and the principal activities of its subsidiaries are the generation and supply of electricity. HEC is engaged in the generation, transmission and distribution of power to Hong Kong Island and Lamma Island. HEI was established as the international investment arm of HEH. HEI has interests in the power-related businesses in Australia, Canada, the United Kingdom, New Zealand and mainland China. ATS is a wholly owned subsidiary of HEH. It was established as an engineering consultancy firm servicing the electricity supply industry.