Constellation Energy Corp. has received approval from the Public Utility Commission of Texas for its deal to acquire Calpine Corp.

Constellation’s $16.4 billion deal to acquire the natural gas power generation company is now one step closer to closing. The deal will combine the U.S.’ largest zero-emissions nuclear fleet with Calpine’s low-emission natural gas and geothermal assets.

The transaction is now awaiting clearance from the New York State Public Service Commission, the Federal Energy Regulatory Commission and the Department of Justice.

The deal, which was announced in January, is expected to close in the fourth quarter of 2025. It remains subject to other customary closing conditions.