Canadian Utilities Limited is a holding company. The Company operates in four segments: Utilities includes the regulated distribution of natural gas by ATCO Gas, , and the regulated distribution and transmission of electricity by ATCO Electric and its subsidiaries, Northland Utilities, Northland Utilities and Yukon Electrical; Energy includes the non-regulated supply of electricity and cogeneration steam by ATCO Power, and the non-regulated natural gas gathering, processing, storage, and natural gas liquids extraction by ATCO Midstream; ATCO Australia includes the non-regulated supply of electricity and cogeneration steam by ATCO Power Australia, and as of July 29, 2011, the regulated distribution of natural gas by ATCO Gas Australia and the development, operation and support of information systems and technologies by ATCO I-Tek Australia, and Corporate and Other includes its investment in ATCO Structures & Logistics. On July 29, 2011, it acquired WA Gas Networks Pty Ltd.