On April 7, 2023, MDU Resources Group, Inc. announced that each of Karen B. Fagg, German Carmona Alvarez, Thomas Everist and Patricia L. Moss (collectively, the “Prospective Knife River Directors”) are expected to resign as directors of the company in connection with their anticipated appointment to the board of directors of Knife River Holding Company, in each case conditioned on, and subject to the completion of, the separation and distribution. The Prospective Knife River Directors have not yet submitted conditional letters of resignation to the Company's board of directors, and are not expected to do so unless and until the Company's board of directors approves the separation and distribution, and sets the record date and distribution date for the distribution. The conditional letters of resignation will provide that such resignations will only become effective upon the completion of the distribution.