Welcome to our dedicated page for Mdu Resources SEC filings (Ticker: MDU), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Locating the exact rate-case update or pipeline expansion detail inside MDU Resources’ sprawling disclosures can feel like searching eight states worth of wires and pipe. The company’s regulated electric, natural-gas distribution, and pipeline businesses generate hundreds of pages that even seasoned analysts struggle to digest.
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Jason L. Vollmer, CFO of MDU Resources Group, Inc. (MDU), purchased 5,000 shares of MDU common stock in an open-market transaction on 08/19/2025 at a price of $16.275 per share. Following the purchase, he beneficially owns 339,548.197 shares directly and additionally holds 8,394.3379 shares indirectly through a 401(k) plan held by a trustee. The Form 4 filing was signed by an attorney-in-fact on behalf of Mr. Vollmer and states the transaction was an open-market purchase.
Tammy J. Miller filed an Initial Statement of Beneficial Ownership (Form 3) for MDU Resources Group, Inc. (MDU). The filing reports that Ms. Miller, identified as a director of the issuer, beneficially owns 3,000 shares of common stock in a direct ownership capacity. The event requiring the statement is dated 08/12/2025, and the filing was signed by an attorney-in-fact on 08/14/2025. No derivative securities, amendments, or additional ownership forms are reported in the document.
MDU Resources Group, Inc. increased its Board to nine directors and elected Charles M. Kelley and Tammy J. Miller as nonemployee directors, effective immediately, to serve until the 2026 Annual Meeting of Stockholders. The Board appointed both to the Audit Committee and determined they are independent under NYSE listing standards.
Both will receive the same nonemployee director compensation as other nonemployee directors, prorated for their time of service. The filing incorporates biographical and compensation details by reference to the company’s proxy statement and furnishes a news release as an exhibit.
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