CenterPoint Energy is a Fortune 500 electric and natural gas utility serving several markets in the U.S. states of Arkansas, Louisiana, Minnesota, Mississippi, Oklahoma, and Texas. It was formerly known as Reliant Energy (from which it is now separated), NorAm Energy, Houston Industries, and HL&P. The company is headquartered in the CenterPoint Energy Tower at 1111 Louisiana Street in Downtown Houston. Some of its notable subscribers include Retail Electric Providers (REPs), such as Reliant Energy, Champion Energy, Dynowatt, Ambit Energy, Texas Power, Bounce Energy, MXenergy, Direct Energy, Stream Energy, First Texas Energy Corporation, Gexa Energy Cirro Energy, and Kona Energy.
When the state of Texas deregulated the electricity market, the former Houston Lighting & Power (HL&P) was split into several companies. In 2003 HL&P was split into Reliant Energy, Texas Genco, and CenterPoint Energy.
Until December 15, 2004, CenterPoint Energy and its predecessors operated in its various markets under these names; they were used separately prior to Reliant Energy, and later in conjunction with the Reliant Energy and CenterPoint Energy names: