---
schema_version: "secwatch.filing_event.v1"
accession: "0001868275-26-000009"
form_type: "8-K"
ticker: null
cik: "0001168165"
company_name: "CONSTELLATION ENERGY GENERATION LLC"
filed_at: "2026-01-15T23:59:59+00:00"
generated_at: "2026-05-16T10:04:37.904329+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Constellation completes exchange of $2.29B in Calpine notes for new Constellation notes; amends indentures

## Summary
- Accepted $2,289,722,000 aggregate principal of Calpine Notes tendered; all accepted notes retired and canceled.
- Issued New 4.625% Senior Notes due 2029, New 5.000% Senior Notes due 2031, and New 3.750% Senior Notes due 2031 with same terms as Calpine Notes.
- Executed supplemental indentures to eliminate substantially all restrictive covenants and events of default (excluding payment and bankruptcy).
- Exchange offers and consent solicitations expired; no longer open to participation.

## SEC filing metadata
- accession: 0001868275-26-000009
- form_type: 8-K
- cik: 0001168165
- company_name: CONSTELLATION ENERGY GENERATION LLC
- filed_at: 2026-01-15T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1168165/000186827526000009/0001868275-26-000009-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1168165/000186827526000009/ceg-20260115.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001868275-26-000009
- JSON: https://secwatch.observer/filing/0001868275-26-000009.json
- Plain text: https://secwatch.observer/filing/0001868275-26-000009.txt

## Key facts
- Debt Financings
  CONSTELLATION ENERGY GENERATION LLC incurred senior notes of $2,289,722,000 aggregate principal amount with U.S. Bank Trust Company, National Association, as trustee at 4.625% per year, 5.000% per year, and 3.750% per year maturing February 1, 2029; February 1, 2031; and March 1, 2031.
  - Instrument: senior notes
  - Principal: $2,289,722,000 aggregate principal amount
  - Counterparty: U.S. Bank Trust Company, National Association, as trustee
  - Rate: 4.625% per year, 5.000% per year, and 3.750% per year
  - Maturity: February 1, 2029; February 1, 2031; and March 1, 2031
  - Event: incurrence
  source text: events of default, other than payment-related and bankruptcy-related events of default (the “Proposed Amendments”). Pursuant to the Exchange Offers and Consent Solicitations, $2,289,722,000 aggregate principal amount of Calpine Notes were validly tendered and subsequently accepted. Such accepted Calpine Notes have been retired and canceled and will not be reissued.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1168165/000186827526000009/0001868275-26-000009-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.