Welcome to our dedicated page for MDU RESOURCES GROUP 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.
MDU Resources Group, Inc. filings document the operations, capital structure and governance of a NYSE-listed regulated energy delivery company. Form 8-K reports furnish quarterly and annual results, investor presentations, capital-investment plan updates and material agreements involving revolving credit, private shelf notes and forward-sale equity transactions.
Proxy materials describe board elections, executive compensation, equity awards and shareholder-voting matters. The filings also identify the company’s common stock, par value $1.00 per share, and provide formal disclosure around financing covenants, subsidiary-level pipeline funding arrangements and other capital-structure matters tied to utility and natural gas pipeline operations.
Jason L. Vollmer, Chief Financial Officer of MDU Resources Group, Inc. (MDU) reported an open-market purchase of 5,000 shares of MDU common stock on 09/08/2025 at a reported price of $16.075 per share. After this transaction Mr. Vollmer directly beneficially owned 344,548.197 shares. He also has indirect beneficial ownership of 8,394.3379 shares held in a 401(k) account by a trustee. The Form 4 was signed by Anthony D. Foti as attorney-in-fact on 09/09/2025. The filing states the purchase was executed in the open market.
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. (MDU) filed an Initial Form 3 reporting that Director Charles M. Kelley has no securities beneficially owned as of the triggering event on 08/12/2025. The filing was signed by Anthony D. Foti, Attorney-in-Fact on 08/14/2025. This Form 3 notifies the SEC and the market of the reporting person's relationship to the issuer (listed as Director) and indicates there are currently no direct or indirect equity holdings to disclose.
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.