PNM Resources Inc. is an investor-owned holding company of energy and energy-related businesses, based in Albuquerque, N.M. Its primary subsidiaries include PNM, TNMP and First Choice. The company has a 50 percent ownership of Optim Energy, which owns nearly 1,200 megawatts of generation resources. For more than 90 years, PNM Resources Inc. has been serving electricity to more than 875,300...