Xcel Energy Inc., a prominent energy company with subsidiaries that engage in the generation, purchase, transmission, distribution, and sale of electricity, operates through three main segments, including the Regulated Electric Utility, the Regulated Natural Gas Utility, and the All Other category. With a diverse portfolio of energy sources, including coal, nuclear, natural gas, hydroelectric, solar, biomass, oil, wood/refuse, and wind energy, the company is able to efficiently meet the energy needs of residential, commercial, and industrial customers in several regions, including Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas, and Wisconsin. Additionally, Xcel purchases, transports, distributes, and sells natural gas to retail customers and customer-owned natural gas, develops and leases natural gas pipelines, and invests in rental housing projects, as well as equipment for constructing renewable generation facilities. Headquartered in Minneapolis, Minnesota, Xcel Energy has been in operation since 1909.