Business Context and Reporting Period
This Form 8-K Current Report, dated December 23, 2025, is filed by Constellation Energy Corporation and its subsidiary Constellation Energy Generation, LLC. The filing addresses an extension of the expiration date for previously announced private exchange offers and consent solicitations related to debt instruments originally issued by Calpine Corporation. These actions are part of the broader merger transaction between Constellation and Calpine announced on January 10, 2025.
Key Financial Metrics and Debt Status
This filing does not report operational financial metrics such as revenue, profit, cash flow, or margins. It focuses exclusively on debt restructuring and tender offer results. As of the Early Tender Deadline (December 22, 2025, 5:00 p.m. ET), the following Calpine Notes were validly tendered and not withdrawn:
- 4.625% Senior Unsecured Notes due 2029: $646,822,000 (approximately 99.51% of outstanding principal).
- 5.000% Senior Unsecured Notes due 2031: $846,337,000 (approximately 99.57% of outstanding principal).
- 3.750% Senior Secured Notes due 2031: $794,462,000 (approximately 88.27% of outstanding principal).
The filing text does not provide a clear value for the total aggregate debt outstanding or the company's current liquidity position beyond the specific tendered amounts.
Material Changes and Transaction Updates
The primary material change reported is the extension of the expiration date for the Exchange Offers and Consent Solicitations:
- Original Expiration Date: January 8, 2026, at 5:00 p.m. ET.
- New Expiration Date: January 12, 2026, at 5:00 p.m. ET (unless further extended or terminated).
- Withdrawal Status: The withdrawal deadline passed on December 22, 2025. Notes tendered after this date and prior to the new expiration date cannot be withdrawn, except in limited circumstances required by law.
Constellation announced it has received the requisite consents to amend the Calpine Indentures to eliminate substantially all restrictive covenants and events of default, excluding payment-related and bankruptcy-related events. These amendments will only become operative on the settlement date of the Exchange Offers, expected to be the third business day after the Amended Expiration Date, and no earlier than the consummation of the merger.
Guidance, Outlook, and Risks
The filing contains forward-looking statements regarding the expected timing and likelihood of completing the Exchange Offers, Consent Solicitations, and the merger transaction. Management anticipates the settlement of the Exchange Offers to occur shortly after the new expiration date, contingent upon the consummation of the merger.
Risks and Contingencies:
- The transaction is subject to conditions set forth in the Offering Memorandum, including the receipt of requisite consents and the consummation of the merger.
- Constellation reserves the right to terminate, withdraw, amend, or extend the offers in its sole discretion.
- Integration risks exist, including the potential for the combined company to not operate as effectively as expected or to fail to achieve anticipated synergies.
- Actual results may differ materially from projections due to unpredictable factors discussed in the company's 2024 Form 10-K and 2025 Form 10-Q.
Investor Verification Checklist
- Verify the final settlement date of the Exchange Offers, which is expected to be the third business day after January 12, 2026.
- Confirm the final percentage of Calpine Notes tendered upon the Amended Expiration Date to ensure the 100% threshold (if applicable) or requisite consent levels are maintained.
- Review the "Offering Memorandum" dated December 9, 2025, for specific terms and conditions governing the exchange and consent solicitation.
- Monitor the status of the merger transaction between Constellation Energy Corporation and Calpine, as the debt amendments are conditioned on its consummation.
- Check for any subsequent filings regarding the termination or further extension of the Exchange Offers.