UNS Energy Corp.
UNS Energy Corp. operates as a utility services holding company, which engages in the electric generation and energy delivery business through its subsidiaries. The company operates its business through its subsidiaries: Tucson Electric Power Co., UniSource Energy Services, Inc., UniSource Energy Development Co. and Millennium Energy Holdings, Inc. Tucson Electric Power Co. is an electric utility serving the community of Tucson, Arizona with electric utility operations, which include the wholesale marketing of electricity to other utilities and power marketers. UNS Gas, Inc. and UNS Electric, Inc. provides natural gas and electric service across Arizona. UniSource Energy Services provides gas and electric service through its two operating subsidiaries, UNS Gas and UNS Gas, Inc. and UNS Electric, Inc. The company was founded on March 8, 1995 and is headquartered in Tucson, AZ.