Xcel Energy Inc. is a US electric and natural gas delivery company operating through Regulated Electric Utility and Regulated Natural Gas Utility segments. It generates, purchases, transmits, distributes, and sells electricity from wind, nuclear, hydroelectric, biomass, solar, coal, and natural gas sources, and also engages in wholesale transmission and commodity trading. The company purchases, transports, stores, distributes, and sells natural gas, and invests in rental housing, energy technology, and community solar assets. It serves customers in parts of Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas, and Wisconsin. Formerly Northern States Power Company, Xcel Energy Inc. was incorporated in 1909 and is headquartered in Minneapolis, Minnesota.