As filed with the Securities and Exchange Commission on September 26, 2023. Registration No. 333- (Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Knife River Corporation (Exact name of Registrant as specified in its charter) (State or other Jurisdiction of Incorporation or Organization) Delaware 1400 92- ...