---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-024945"
form_type: "8-K"
ticker: "DUK"
cik: "0001326160"
company_name: "Duke Energy CORP"
filed_at: "2026-03-09T23:59:59+00:00"
generated_at: "2026-05-15T17:32:29.054697+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Duke Energy launches $1B convertible note offering due 2029 to refinance maturing debt

## Summary
- Offers $1B aggregate principal of convertible senior notes due 2029; underwriters may purchase additional $150M.
- Net proceeds to repay $1.725B of existing 4.125% convertible notes maturing April 15, 2026.
- Final observation period for existing convertible notes began March 9, 2026; could affect common stock prices.
- Notes are unsecured, unsubordinated, convertible into cash and/or common stock upon satisfaction of conditions.

## SEC filing metadata
- accession: 0001104659-26-024945
- form_type: 8-K
- ticker: DUK
- cik: 0001326160
- company_name: Duke Energy CORP
- filed_at: 2026-03-09T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1326160/000110465926024945/0001104659-26-024945-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1326160/000110465926024945/tm268071d2_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-024945
- JSON: https://secwatch.observer/filing/0001104659-26-024945.json
- Plain text: https://secwatch.observer/filing/0001104659-26-024945.txt

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