---
schema_version: "secwatch.filing_event.v1"
accession: "0001539497-25-003350"
form_type: "8-K"
ticker: "MDU"
cik: "0000067716"
company_name: "MDU RESOURCES GROUP INC"
filed_at: "2025-12-29T23:59:59+00:00"
generated_at: "2026-05-16T12:11:16.786231+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# MDU Resources issues additional 1.52M forward shares at $18.90; underwriters exercise option in full

## Summary
- Underwriters exercised option for 1,522,842 additional shares on Dec 23, 2025.
- Forward shares borrowed and sold; settlement by Dec 6, 2027 at initial price $18.90/share.
- Forward price adjusts based on overnight bank funding rate minus 0.75% spread.
- Company expects no EPS dilution unless average market price exceeds adjusted forward price.
- Total offering includes original 10,152,284 forward shares plus option shares.

## SEC filing metadata
- accession: 0001539497-25-003350
- form_type: 8-K
- ticker: MDU
- cik: 0000067716
- company_name: MDU RESOURCES GROUP INC
- filed_at: 2025-12-29T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/67716/000153949725003350/0001539497-25-003350-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/67716/000153949725003350/n5198_x7-8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001539497-25-003350
- JSON: https://secwatch.observer/filing/0001539497-25-003350.json
- Plain text: https://secwatch.observer/filing/0001539497-25-003350.txt

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