Constellation-Calpine Antitrust Settlement and Divestiture Execution
Department of Justice
The Department of Justice Antitrust Division published its Response of Plaintiff United States to Public Comments on the Proposed Final Judgment regarding the acquisition of Calpine Corporation by Constellation Energy Corporation.
Published in the Federal Register on April 24, 2026, the notice signals the federal government's immediate intent to move the United States District Court for the District of Columbia to enter the final judgment.
The underlying civil antitrust complaint, filed concurrently with the State of Texas, alleged the merger threatened to substantially lessen competition within the wholesale electricity markets of the Electric Reliability Council of Texas and the PJM Coastal Mid-Atlantic region.
To remedy the identified competitive harms, the finalized structural mechanics require the defendants to divest seven electric generating facilities located within the ERCOT and PJM grids.
Constellation and Calpine must execute these transfers to acquirers deemed acceptable by the United States acting in its sole discretion following consultation with Texas.
The operational mandates force the defendants to warrant that all divested assets are transferred fully operational and entirely devoid of material defects.
They must also utilize best efforts to assist incoming operators in securing all necessary licenses, registrations, and permits required for uninterrupted generation.
The settlement structure reaches directly into workforce continuity by mandating cooperation in the identification and transition of relevant personnel.
Constellation and Calpine are legally bound to make full-time, part-time, and contract employees stationed at the specific divestiture assets available for interviews with prospective acquirers while refraining from any interference in subsequent employment offers.
Enforcement realities dictate a strict two-hundred-and-forty-day divestiture window.
Failure to liquidate the targeted generation facilities within this timeframe triggers a provision allowing the United States to petition the court for the appointment of a divestiture trustee, who assumes the unilateral right to force the sale of the remaining assets.
The jurisdictional boundaries of the final judgment strictly isolate wholesale electricity generation from downstream retail distribution.
During the statutory sixty-day review period mandated by the Antitrust Procedures and Penalties Act, a single public comment submitted by the Pennsylvania Office of Consumer Advocate challenged the settlement's failure to address secondary impacts on local utility default service supply procurements and the broader retail electricity market.
The Justice Department categorically excluded these concerns from the remedy framework.
Applying the Tunney Act standard, federal prosecutors noted the statutory review limits the court's authority to assessing remedies directly linked to the specific violations alleged in the original complaint.
Because the initial action narrowly targeted wholesale generation, the government determined retail market impacts reside entirely outside the scope of the federal antitrust settlement, effectively deferring consumer supply concerns to alternative state or federal administrative forums.