UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K Current Report PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported) January 22, 2004 MDU Resources Group, Inc. (Exact name of registrant as specified in its charter) Delaware 1-3480 41-0423660 (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) Identification No.) Schuchart Building 918 East Divide Avenue P.O. Box 5650 Bismarck, North Dakota 58506-5650 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code (701) 222-7900 Item 5. Other Events and Regulation FD Disclosure. The information set forth below pursuant to Item 12 shall also be filed pursuant to Item 5. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits. (c) Exhibits. Exhibit 99 - Press release issued January 22, 2004 regarding earnings for 2003. Item 12. Results of Operations and Financial Condition. On January 22, 2004, MDU Resources Group, Inc. issued a press release regarding its earnings for 2003. A copy of the press release is attached hereto as Exhibit 99 and incorporated by reference herein. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. MDU RESOURCES GROUP, INC. Date January 22, 2004 BY /s/ Warren L. Robinson Warren L. Robinson Executive Vice President and Chief Financial Officer EXHIBIT INDEX Exhibit Number Description of Exhibit 99 Press release issued January 22, 2004 regarding earnings for 2003.