---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-094481"
form_type: "8-K"
ticker: "BKH"
cik: "0001130464"
company_name: "BLACK HILLS CORP /SD/"
filed_at: "2025-09-29T23:59:59+00:00"
generated_at: "2026-05-17T05:21:51.846238+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Black Hills issues $450M of 4.550% Notes due 2031; net proceeds ~$447M

## Summary
- Issued $450M aggregate principal of 4.550% Notes due 2031.
- Net proceeds approximately $447M after original issue discount and underwriting discounts.
- Settlement scheduled for October 2, 2025, subject to customary closing conditions.
- Offered under existing shelf registration statement (Form S-3).

## SEC filing metadata
- accession: 0001104659-25-094481
- form_type: 8-K
- ticker: BKH
- cik: 0001130464
- company_name: BLACK HILLS CORP /SD/
- filed_at: 2025-09-29T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1130464/000110465925094481/0001104659-25-094481-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1130464/000110465925094481/tm2526501d4_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-094481
- JSON: https://secwatch.observer/filing/0001104659-25-094481.json
- Plain text: https://secwatch.observer/filing/0001104659-25-094481.txt

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