Power Assets Holdings Limited, formerly Hongkong Electric Holdings Limited, is an investment holding company. Through its subsidiaries, it is engaged in investment in power and utility related businesses outside Hong Kong and generation and supply of electricity to Hong Kong Island and Lamma Island. It has three segments: sales of electricity, which is engaged in the provision of electricity in Hong Kong; infrastructure investment, which is engaged in investments in electricity and other infrastructure projects and is segregated further into four geographical segments, being Australia, United Kingdom, Mainland China and Others, as well as all other activities. As of December 31, 2012, its subsidiaries included The Hongkong Electric Company, Limited, Associated Technical Services Limited, Power Assets (Electric Vehicles) Company Limited, Hongkong Electric (Natural Gas) Limited and others.