X0508 4 2026-03-04 0001955520 Knife River Corp KNF 0002064646 LaChapelle Sarah L. 1150 WEST CENTURY AVENUE BISMARCK ND 58503 1 VP & Chief People Officer 0 Common Stock 2026-03-04 4 A 0 2713.0000 0.0000 A 4578.0000 D Common Stock 7.7142 I By Trustee Common Stock - 401(k) 1897.7925 I By Trustee Represents restricted stock units (RSUs) that vest on December 31, 2028, provided that the reporting person remains employed by the issuer as of the vesting date. Each RSU represents the contingent right to receive one share of the issuer's common stock. The reporting person is a trustee and beneficiary of the Paul and Jan Eggleston Trust. The reporting person disclaims beneficial ownership of these securities except to the extent of her proportionate pecuniary interest therein. As of the most recent quarter end, the number of shares may fluctuate daily depending on plan activity in the fund. /s/ Karl A. Liepitz, Power of Attorney 2026-03-05