01—Abstract
Summary
Summary of the 8-K filed December 9, 2025. Cited figures are marked; the original filing is the authoritative source.
Constellation Energy Corporation (CEG) and its subsidiary Constellation Energy Generation, LLC announced on December 9, 2025 that Constellation Energy Generation is launching private exchange offers and consent solicitations for about $2.4 billiona of Calpine Corporation notes.
This is a financing step tied to CEG's planned acquisition of Calpine under the Merger Agreement dated January 10, 2025. The Calpine Notes include $650 millionb of 4.625% unsecured notes due 2029, $850 million of 5.000% unsecured notes due 2031, and $900 million of 3.750% secured notes due 2031. Holders can exchange them for new Constellation notes with the same coupons and maturity dates, and the new notes drop certain Calpine redemption features and carry stronger call protection.
The Existing Secured 2031 Notes would be exchanged into unsecured New March 2031 Notes, which removes Calpine's secured status on that series. Holders who tender by the Early Tender Deadline of 5:00 p.m. NYC time on December 22, 2025 receive $970c of new notes per $1,000 tendered plus a cash payment.
The cash payment is pro-rated and ranges from $1.00d per $1,000 for the 2029 and February 2031 unsecured notes, and $2.50 per $1,000 for the secured notes, if all holders tender, up to about $2.00, $2.00 and $5.00 per $1,000 respectively if only a simple majority tenders. Holders who tender after the early deadline but by the January 8, 2026 expiration receive $970 of new notes per $1,000 with no cash. Tenders are irrevocable after the December 22 withdrawal deadline.
The consent solicitation would strip substantially all restrictive covenants and events of default from the Calpine indentures, other than payment and bankruptcy defaults. Consents from a majority of each series are needed, and tendering holders must also consent. For investors, the key points are that the offers are conditioned on closing the Calpine merger, that they are not conditioned on any minimum tender level, and that they are being made privately to qualified institutional and non-U.S. eligible holders.
The offers mainly affect Calpine's debt structure and creditor protections, and they signal that CEG intends to consolidate Calpine's debt into its own capital structure at closing. The filing does not disclose the merger's purchase price or financing terms, and the forward-looking statement cautions note integration and synergy risks.
02—Key points
Key Highlights
- Constellation Energy Generation is offering to exchange about $2.4 billion of Calpine notes: $650M 4.625% unsecured 2029, $850M 5.000% unsecured 2031, and $900M 3.750% secured 2031.
- Early tenders by December 22, 2025 receive $970 of new Constellation notes per $1,000 plus a pro-rated cash payment of $1.00 to $2.50 per $1,000 at full tender, rising to about $2.00 to $5.00 if only a simple majority tenders.
- Tenders after December 22 but by the January 8, 2026 expiration receive $970 of new notes per $1,000 with no cash payment.
- The Existing Secured 2031 Notes would be exchanged into unsecured New March 2031 Notes, and the new February and March 2031 notes lose certain Calpine redemption features while gaining stronger call protection.
- The consent solicitation would remove substantially all restrictive covenants and events of default from the Calpine indentures, other than payment and bankruptcy defaults, requiring majority consent per series.
- The exchange offers are conditioned on consummation of the Calpine merger under the January 10, 2025 Merger Agreement, with no minimum tender threshold, and the offering is private and limited to eligible holders.
- The transaction is a financing step tied to CEG's planned acquisition of Calpine and shows the expected consolidation of Calpine's debt into the combined company's capital structure.
03—Questions
Frequently Asked Questions
What is Constellation offering Calpine noteholders?
Constellation Energy Generation is offering to exchange any and all of Calpine's outstanding notes, about $2.4 billion in total, for new Constellation notes with the same coupons, maturities and interest payment dates. Early tenders by December 22, 2025 also receive a cash payment of $1.00 to $2.50 per $1,000 principal amount, pro-rated and subject to change depending on how much is tendered.
What is the deadline for participating?
The early tender and withdrawal deadline is 5:00 p.m. New York City time on December 22, 2025. Tenders and consents are irrevocable after that point, except where law requires additional withdrawal rights. The expiration date is 5:00 p.m. New York City time on January 8, 2026, unless extended or terminated early, and settlement is expected about three business days after expiration.
Why are the exchange offers happening?
The offers are tied to Constellation's planned acquisition of Calpine under the January 10, 2025 Merger Agreement. The exchange moves Calpine's debt into Constellation's obligations and removes most of the restrictive covenants in the Calpine indentures, which gives the combined company more flexibility. The filing does not state a specific financing rationale beyond this.
What happens if the merger does not close?
The exchange offers and consent solicitations will not be consummated, no exchange or cash consideration will be paid, and the proposed indenture amendments will not become effective. Calpine's existing notes and covenants would stay in place.
Does this transaction affect CEG shareholders directly?
The filing does not disclose the purchase price, financing sources, or pro forma impact on earnings or leverage for the Calpine acquisition. The exchange itself is a debt-level transaction at the Constellation Energy Generation subsidiary, and its cash cost depends on tender levels and the cash payments, which the filing describes only as a range and does not quantify in total. Investors should review the Offering Memorandum and future merger disclosures for the financial effect on CEG.
04—Continue