Imilian/Shutterstock Save for later Print Download Share LinkedIn Twitter US utility Vistra, the parent company of Luminant Energy that owns the 2,400 Comanche Peak nuclear power plant in Texas, announced that it has executed a $3.43 billion definitive agreement to acquire the nuclear and retail businesses of Ohio-based Energy Harbor and its three nuclear facilities in Ohio and Pennsylvania. The deal narrows the gap between the second-largest merchant nuclear fleet in the country, now at 6.4 gigawatts, and the largest, owned by Constellation Energy at 22 GW.