Constellation Energy Corporation (Nasdaq: CEG) has achieved a pivotal milestone in its acquisition of Calpine Corporation, secured regulatory approval from the New York State Public Service Commission. This follows swiftly on the heels of clearance by the Texas Public Utility Commission earlier this month.
Deal Overview & Strategic Rationale
- Announced January 2025: Constellation unveiled plans to acquire Calpine in a cash‑and‑stock transaction valuing Calpine’s equity at approximately $16.4 billion. The consideration comprises 50 million shares of Constellation common stock and $4.5 billion in cash, alongside the assumption of roughly $12.7 billion in Calpine debt.
- Transaction Size & Structure: The enterprise deal—equity plus debt—values Calpine at $26–29 billion, including debt, representing a multiple of ~8× Calpine’s forecast 2026 EBITDA, which is seen as a noteworthy discount versus sector peers.
- Expected Close: The transaction is anticipated to finalize in Q4 2025, pending further approvals from the Federal Energy Regulatory Commission (FERC), Department of Justice, the Canadian Competition Bureau, and customary closing conditions.
About the Companies
Constellation Energy
- Headquarters: Baltimore, Maryland.
- Core Business: Nation’s largest operator of zero‑emissions nuclear power, supplemented by hydro, wind, and solar, delivering nearly 90% carbon‑free energy across ~16 million homes.
- Scale: ~19 GW nuclear capacity + renewable spread; ~14,000+ employees.
- Market Context: Successfully spun off from Exelon in 2022; shares surged on growth prospects tied to increasing clean energy demand, especially from AI and data‑center power needs.
Calpine Corporation
- Headquarters: Houston, Texas.
- Core Business: Leading generator of electricity from natural gas and geothermal sources, with 78–80 plants totaling ~27,000–26,000 MW capacity.
- Geothermal Flagship: Majority stake in “The Geysers” in California, the largest geothermal facility in North America (~725 MW).
- Ownership History: Taken private in 2018 by Energy Capital Partners (ECP), Canada Pension Plan, and Access Industries; now set for the largest private‑equity exit in power/utility in two decades.
Strategic Impact
The merger brings together Constellation’s carbon‑free nuclear fleet and Calpine’s flexible, low‑carbon natural gas and geothermal power, forming a coast‑to‑coast energy platform. This positions the combined company to support surging electricity demand driven by AI data‑centers, industrial expansion, and electrification.
Financially, Constellation anticipates 20%+ earnings‑per‑share accretion in 2026, with EPS rising by at least $2 per share, while maintaining an investment‑grade credit rating
Next Steps & Remaining Approvals
With state approvals finalized in Texas and New York, the deal now awaits:
- FERC sign‑off
- DOJ clearance
- Canadian Competition Bureau approval
- Completion of Hart-Scott‑Rodino process and other customary conditions
Per the merger agreement, if the deal doesn’t close by December 31, 2025 (extendable to June 1, 2026), either party may terminate—and in that event, Constellation would owe Calpine a $500 million breakup fee.
Conclusion
The completion of state-level regulatory approval marks a major step forward in the $16.4 billion strategic acquisition by Constellation Energy of Calpine. Once finalized—anticipated in late 2025—the transaction will create a diversified, clean, reliable, and flexible power generation powerhouse positioned to lead the U.S. into a new energy era.

