Business Context and Reporting Period
This Form 8-K, dated December 9, 2025, is a joint filing by Constellation Energy Corporation (CEG Parent) and Constellation Energy Generation, LLC (Constellation). The report discloses the submission of financial statements and exhibits related to the planned acquisition of Calpine Corporation, pursuant to a Merger Agreement entered into on January 10, 2025. Upon completion, Calpine will become an indirect, wholly-owned subsidiary of Constellation.
Key Financial Metrics and Statements Filed
The filing does not contain specific numerical values for revenue, profit, or cash flow within the text body. Instead, it incorporates by reference the following financial documents filed as exhibits:
- Calpine Historical Audited Statements: As of December 31, 2024, and 2023, and for the years ended December 31, 2024, 2023, and 2022 (Exhibit 99.1).
- Calpine Historical Unaudited Statements: As of September 30, 2025, and 2024, and for the three and nine months ended September 30, 2025, and 2024 (Exhibit 99.2).
- Pro Forma Combined Statements: Unaudited combined financial statements for CEG Parent and Constellation as of September 30, 2025, and for the nine months ended September 30, 2025, and the year ended December 31, 2024 (Exhibit 99.3).
The pro forma statements reflect the acquisition of Calpine and are preliminary, based on assumptions that the transaction will be consummated.
Material Changes and Transaction Details
The primary material event is the progression of the acquisition of Calpine Corporation. The filing serves to provide investors with the required financial data of the target company and the projected combined financial position. No other material changes to operations or financial condition are detailed in the text of this specific report.
Guidance, Risks, and Contingencies
The filing contains extensive forward-looking statements regarding the merger, including expected timing, likelihood of completion, and anticipated synergies. Management cautions that these are not guarantees of future performance. Key risks and contingencies include:
- Regulatory Approval: The risk that governmental and regulatory approvals may not be obtained, may be delayed, or may impose conditions causing the parties to abandon the transaction.
- Transaction Conditions: The risk that conditions to the proposed transaction cannot be satisfied in a timely manner or at all.
- Integration Risks: Potential difficulties in integrating the businesses, which could prevent the combined company from operating as effectively as expected.
- Synergy Realization: The risk that anticipated synergies or benefits may not be achieved or may take longer than expected.
Investor Verification Checklist
- Review Exhibit 99.1 for Calpine's audited historical financial performance for 2022-2024.
- Review Exhibit 99.2 for Calpine's unaudited financial performance for the nine months ended September 30, 2025.
- Analyze Exhibit 99.3 to understand the pro forma combined financial impact of the merger on Constellation Energy.
- Consult the original Form 8-K filed on January 13, 2025, for detailed terms of the Merger Agreement.
- Monitor regulatory filings for updates on the status of required governmental approvals.