---
schema_version: "secwatch.filing_event.v1"
accession: "0000067716-23-000051"
form_type: "8-K"
ticker: "MDU"
cik: "0000067716"
company_name: "MDU RESOURCES GROUP INC"
filed_at: "2023-04-25T23:59:59+00:00"
generated_at: "2026-06-16T17:19:56.316146+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Knife River Holding Co. closes $425M 7.75% notes offering for spinoff

## Summary
- Knife River Holding Co., a wholly owned subsidiary of MDU Resources, issued $425M of 7.750% senior notes due 2031.
- Proceeds held in escrow until spinoff of Knife River Corp. conditions satisfied; then lent to Knife River to repay intercompany obligations.
- Notes bear interest at 7.750% per annum, payable semiannually, mature May 1, 2031.
- From and after spinoff, notes will be guaranteed by certain Knife River Holding Co. subsidiaries.
- Escrow release requires officer's certificate that spinoff is expected within one business day; otherwise special mandatory redemption.

## SEC filing metadata
- accession: 0000067716-23-000051
- form_type: 8-K
- ticker: MDU
- cik: 0000067716
- company_name: MDU RESOURCES GROUP INC
- filed_at: 2023-04-25T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/67716/000006771623000051/0000067716-23-000051-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/67716/000006771623000051/mdu-20230425.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000067716-23-000051
- JSON: https://secwatch.observer/filing/0000067716-23-000051.json
- Plain text: https://secwatch.observer/filing/0000067716-23-000051.txt

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