PNM Resources, Inc. operates as an investor-owned holding company, which provides electricity and electric services in New Mexico and Texas. It operates through the following segments: Public Service Company of New Mexico (PNM), Texas-New Mexico Power Company (TNMP), and Corporate and Other. The PNM segment includes the retail electric utility operations of the company. The TNMP segment provides transmission and distribution services of electricity in Texas. The Corporate and Other segment consists of holding company activities. The company was founded in 2000 and is headquartered in Albuquerque, NM.