Dimensional Fund Advisors LP Reports New 5.0% Stake in MDU Resources Group Inc

On April 9, 2026, Dimensional Fund Advisors LP filed a Schedule 13G with the SEC, reporting a new 5.0% ownership stake in MDU Resources Group Inc. As of the event date on March 31, 2026, the investment firm beneficially owned 10,285,747 shares of MDU Common Stock. Dimensional Fund Advisors LP serves as an investment adviser to various registered investment companies, trusts, and separate accounts, collectively referred to as the 'Funds.' While Dimensional possesses voting and investment power over these securities in its capacity as an adviser or manager, it explicitly disclaims beneficial ownership of the shares, noting that the Funds themselves are the legal owners. Of the total shares, Dimensional holds sole voting power over 10,136,321 shares and sole dispositive power over all 10,285,747 shares. The filing indicates that these securities were acquired in the ordinary course of business and were not intended to influence or change the control of the issuer. This filing represents an increase from a previously reported 0.0% position.