MDU RESOURCES GROUP INC

Under our proxy access bylaw, a stockholder, or a group of up to 20 stockholders, owning at least 3% of the Common Stock continuously for at least three years as of the date of the notice of nomination, may nominate and include in the Company’s proxy materials director nominees constituting up to two individuals or 20% of the Board, whichever is greater (subject to certain limitations set forth in the Bylaws), provided that the stockholder(s) and nominee(s) satisfy the requirements specified in the Bylaws. We believe these proxy access parameters reflect a well-designed and balanced approach to proxy access that mitigates the risk of abuse and protects the interests of all of our stockholders. See Deadlines and Procedures for Nominations and Stockholder Proposals for the 2026 Annual Meetingon page 82 for further information.