PNM Resources, Inc. is an American energy provider that delivers electricity and related services through its operating divisions. The company's operations are primarily conducted via two subsidiaries: Public Service Company of New Mexico (PNM) and Texas-New Mexico Power Company (TNMP). The PNM segment is responsible for the generation, transmission, and distribution of electricity. It utilizes a varied portfolio of energy sources, including coal, natural gas and oil, nuclear power, solar, wind, and geothermal. As of December 31, 2021, this division's owned and leased facilities boasted a combined net generating capacity of 2,168 megawatts. Its infrastructure at that time also comprised 3,426 miles of electric transmission lines, 5,751 miles of overhead distribution lines, 5,765 miles of underground distribution lines, and 250 substations. Additionally, PNM owns and leases various communication and office equipment, office premises, vehicles, and real estate. Conversely, the TNMP segment focuses on providing regulated electricity transmission and distribution services. By the close of 2021, its assets included 983 miles of overhead electric transmission lines, 7,297 miles of overhead distribution lines, 1,408 miles of underground distribution lines, and 113 substations. This segment also manages its fleet of vehicles, service centers, and office locations throughout its operational territories. Collectively, PNM Resources, Inc. serves approximately 806,000 residential, commercial, and industrial consumers of electricity across New Mexico and Texas. The company was founded in 1882 and has its corporate headquarters situated in Albuquerque, New Mexico.