---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-096060"
form_type: "8-K"
ticker: "BKH"
cik: "0001130464"
company_name: "BLACK HILLS CORP /SD/"
filed_at: "2025-10-02T23:59:59+00:00"
generated_at: "2026-05-17T04:53:32.764786+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Black Hills issues $450M of 4.550% Notes due 2031 to refinance $300M 2026 notes

## Summary
- Aggregate principal of $450M, interest 4.550%, maturing January 31, 2031.
- Net proceeds to repay $300M of 3.950% notes due January 15, 2026.
- Remaining proceeds for general corporate purposes including capex and acquisitions.
- Notes are unsecured senior obligations ranking equally with existing unsecured debt.
- Issued under existing shelf registration and supplemental indenture dated October 2, 2025.

## SEC filing metadata
- accession: 0001104659-25-096060
- form_type: 8-K
- ticker: BKH
- cik: 0001130464
- company_name: BLACK HILLS CORP /SD/
- filed_at: 2025-10-02T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 8.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1130464/000110465925096060/0001104659-25-096060-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1130464/000110465925096060/tm2527704d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-096060
- JSON: https://secwatch.observer/filing/0001104659-25-096060.json
- Plain text: https://secwatch.observer/filing/0001104659-25-096060.txt

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