Infratil Limited is a New Zealand-based company, which owns energy, transport and social infrastructure businesses that provide services to individuals and communities. The Company owns and operates infrastructure and utility businesses and investments in New Zealand and Australia. The Company is organized into six business segments: Trustpower, Wellington Airport, NZ Bus, Australian Energy, Retirement and Other. Trustpower is its renewable generation investment. Wellington International Airport is its Wellington airport investment. NZ Bus is its transportation investment. Australian Energy is its renewable generation investment. Retirement is its investments in Metlifecare and RetireAustralia. Other comprises investment activity not included in the specific categories. The Company's subsidiaries include Infratil Finance Limited, New Zealand Bus Limited and Wellington International Airport Limited.