CalEnergy Resources Limited (“CalEnergy”) is a wholly-owned subsidiary of Northern Powergrid which is in turn owned by Berkshire Hathaway Energy Company, which is headquartered in Des Moines, Iowa, U.S. The group of operating companies headed by CalEnergy currently participates in upstream oil and gas projects in Australia, Poland and the U.K. CalEnergy currently has three offices located in: - London, UK - Perth, Western Australia - Warsaw, Poland