---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-105224"
form_type: "8-K"
ticker: "CMS"
cik: "0000811156"
company_name: "CMS ENERGY CORP"
filed_at: "2025-11-03T23:59:59+00:00"
generated_at: "2026-05-17T01:00:13.389681+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# CMS Energy launches $750M convertible notes offering due 2031; proceeds to refinance maturing debt

## Summary
- $750M aggregate principal of convertible senior notes due 2031 in private placement; underwriter option for additional $112.5M.
- Net proceeds to retire $250M of 3.60% Senior Notes due Nov 15, 2025; remainder for general corporate purposes.
- Notes convertible at holder's option upon conditions; settlement in cash, stock, or combination at CMS election.
- Interest payable semiannually; notes are senior unsecured obligations of CMS Energy.

## SEC filing metadata
- accession: 0001104659-25-105224
- form_type: 8-K
- ticker: CMS
- cik: 0000811156
- company_name: CMS ENERGY CORP
- filed_at: 2025-11-03T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/811156/000110465925105224/0001104659-25-105224-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/811156/000110465925105224/tm2530025d2_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-105224
- JSON: https://secwatch.observer/filing/0001104659-25-105224.json
- Plain text: https://secwatch.observer/filing/0001104659-25-105224.txt

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