Mdu Resources Group INC 8-K Filing

Ticker: MDU · Form: 8-K · Filed: Dec 29, 2025 · CIK: 67716

Sentiment: neutral

Filing Stats: 2,506 words · 10 min read · ~8 pages · Grade level 12.9 · Accepted 2025-12-29 16:40:58

Key Financial Figures

Filing Documents

Financial Statements and Exhibits

Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 1.1

Underwriting

Underwriting Agreement, dated December 3, 2025 (incorporated by reference to Exhibit 1.1 to the Company's Current Report on Form 8-K, filed with the SEC on December 5, 2025). 5.1 Opinion of Perkins Coie LLP. 10.1 Forward Sale Agreement between MDU Resources Group, Inc. and Wells Fargo Bank, National Association, dated December 23, 2025. 10.2 Forward Sale Agreement between MDU Resources Group, Inc. and Bank of America, N.A., dated December 23, 2025. 10.3 Forward Sale Agreement between MDU Resources Group, Inc. and JPMorgan Chase Bank, National Association, New York Branch, dated December 23, 2025. 23.1 Consent of Perkins Coie LLP (included in Exhibit 5.1). 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Date: December 29, 2025 MDU RESOURCES GROUP, INC. By: /s/ Anthony D. Foti Name: Anthony D. Foti Title: Chief Legal Officer and Corporate Secretary

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