UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _____________ to ______________ Commission file number 1-03480 MDU RESOURCES GROUP INC (Exact name of registrant as specified in its charter) Delaware 30-1133956 (Sta ...

MDU Resources Group, Inc. (NYSE:MDU) Q2 2023 Results Conference Call August 3, 2023 2:00 PM ET Company Participants Jason Vollmer - Vice President, Chief Financial Officer and Treasurer Dave Goodin - President and CEO Stephanie Barth - Vice President, Chief Accounting Officer and Controller, MDU Resources Nicole Kivisto - President and CEO, Utility Group Rob Johnson - President, WBI Energy Jeff Thiede - President and CEO, MDU Construction Services Group Conference Call Participants Dariusz Lozny - Bank of A ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _____________ to ______________ Commission file number 1-03480 MDU RESOURCES GROUP INC (Exact name of registrant as specified in its charter) Delaware 30-1133956 (State or ...

FIRST QUARTER EARNINGS CALL May 4, 2023 FORWARD-LOOKING STATEMENTS During the course of this presentation, we will make certain “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934. Although the company believes that its expectations and beliefs are based on ...

MDU Resources Group, Inc. (NYSE:MDU) Q1 2023 Earnings Conference Call May 4, 2023 2:00 PM ET Company Participants Jason Vollmer - Vice President and Chief Financial Officer Dave Goodin - President and Chief Executive Officer Stephanie Barth - Vice President, Chief Accounting Officer and Controller Brian Gray - President and Chief Executive Officer, Knife River Corporation Jeff Thiede - President and Chief Executive Officer, MDU Construction Services Group Trevor Hastings - President and Chief Executive Offi ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _____________ to ______________ Commission file number 1-03480 MDU RESOURCES GROUP INC (Exact name of registrant as specified in its charter) Delaware 30-1133956 (State o ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _____________ to ______________ Commission file number 1-03480 MDU RESOURCES GROUP INC (Exact name of registrant as specified in its charter) Delaware 30-1133956 (State or ot ...

MDU Resources Group, Inc. (NYSE:MDU) Q4 2022 Earnings Conference Call February 9, 2023 2:00 PM ET Company Participants Jason Vollmer - VP & CFO David Barney - President & CEO, Knife River Corporation Nicole Kivisto - CEO & President, Cascade Natural Gas Corp, Intermountain Gas Co & Montana-Dakota Utilities Co. Jeffrey Thiede - President & CEO, MDU Construction Services Group, Inc David Goodin - President, CEO & Director Trevor Hastings - President & CEO, WBI Energy, Inc. Conference Call Participants Dariusz ...