---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-053475"
form_type: "8-K"
ticker: "CMS"
cik: "0000811156"
company_name: "CMS ENERGY CORP"
filed_at: "2023-05-01T23:59:59+00:00"
generated_at: "2026-06-16T05:46:00.352159+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# CMS Energy proposes $650M convertible senior notes due 2028

## Summary
- Offering of $650M principal amount of convertible senior notes due 2028 in private placement.
- Initial purchasers granted option to buy up to an additional $100M within 13 days.
- Net proceeds to redeem, repurchase or repay existing consolidated indebtedness.
- Notes are senior unsecured, pay semiannual interest; conversion settled in cash, stock, or combination.
- No registered offering; only to qualified institutional buyers under Rule 144A.

## SEC filing metadata
- accession: 0001104659-23-053475
- form_type: 8-K
- ticker: CMS
- cik: 0000811156
- company_name: CMS ENERGY CORP
- filed_at: 2023-05-01T23:59:59+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/811156/000110465923053475/0001104659-23-053475-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/811156/000110465923053475/tm2314121d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-053475
- JSON: https://secwatch.observer/filing/0001104659-23-053475.json
- Plain text: https://secwatch.observer/filing/0001104659-23-053475.txt

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