Constellation Documents Calpine Acquisition for $4.5 Billion and 50 Million Shares
Key Facts
Constellation Energy said in its quarterly report filed on November 9 that its acquisition of all outstanding interests in Calpine closed on January 7, 2026, making Calpine a wholly owned subsidiary. The consideration was about $4.5 billion in cash, along with the issuance of 50 million new Constellation shares, according to the company’s filing with the U.S. Securities and Exchange Commission. The report includes the deal in its third-quarter results and does not announce a new closing on November 9. This means the acquisition preceded the period covered by the report, while the figures in it reflect the combined company’s operating and financial performance. The report was published alongside the third-quarter results and an increase in full-year adjusted earnings guidance.
After regulatory divestitures, the combined assets included a generation fleet with capacity of about 23 gigawatts, as well as a retail platform serving an annual electric load of about 62 terawatt-hours, according to the company. These figures provide a measure of the scale of Calpine’s contribution to Constellation’s business, both in electricity generation and sales to customers. Constellation said the combination brings together its emissions-free generation with Calpine’s dispatchable natural gas assets, adding scale and diversifying its market mix. The company described this diversification as enabling “increased scale and meaningful market diversification.” When announcing the deal, it also said it was combining its nuclear expertise with Calpine’s natural gas and geothermal fleets to expand the products and services it can offer. The company thus links the deal to expanding its generation and retail operations, not simply to adding generating capacity.
The deal followed a regulatory approval process that included a settlement with the U.S. Department of Justice and the state of Texas to address competition concerns. The settlement required the divestiture of 6 power plants in Delaware, Pennsylvania and Texas. It provided the final regulatory approval for the merger and required the company to enter into divestiture agreements within 240 days of the acquisition closing, by September 4, 2026. The company describes the fleet’s capacity and the retail platform after the required divestitures, placing the operating figures in the context of the obligations accompanying the deal. These conditions were part of the acquisition process that concluded in January, according to the quarterly disclosure.
On results, Constellation posted third-quarter 2026 net income under generally accepted accounting principles of $5.19 per share, compared with $2.97 in the same period of 2025. Adjusted operating earnings were $5.06 per share, up from $3.04 a year earlier. The company attributed adjusted earnings primarily to “favorable market and portfolio conditions and the addition of Calpine,” partly offset by interest costs and the effects of its nuclear production tax credit portfolio. The year-over-year comparison shows increases in both measures, while the company attributed part of the quarter’s performance to Calpine joining the portfolio. These figures alone do not separate the acquisition’s contribution from the effects of the market and portfolio conditions cited by the company.
Constellation raised and narrowed its 2026 adjusted operating earnings guidance range to $12.50–$12.80 per share, according to its earnings announcement. The range follows the company’s statement when announcing the deal that it would add more than $2 billion a year to free cash flow before growth investments and deliver an increase of at least $2.00 in adjusted earnings per share annually through 2029. The company had also said the deal would boost earnings and free cash flow before growth investments from closing. Those estimates were projections disclosed when the deal was announced, while the 2026 range reflects the company’s current guidance for the year. Constellation shares closed at $249.95 on November 6, 2026, according to EL7 daily data.