Vistra’s acquisition of Cogentrix Public Utilities would increase market power and could undermine competition in ISO-NE and PJM, market monitors for the RTOs argued.

Vistra is paying $4 billion to acquire a fleet of natural gas plants in PJM, ISO-NE and ERCOT.

Vistra says it will build two new advanced natural gas power units at its Permian Basin Power Plant in West Texas, adding 860 MW of capacity to a petroleum-rich region that is rapidly undergoing an electrification transformation.