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, 2021 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) (State or other jurisdiction of ...

FEB 10, 2022 2021 EARNINGS & 2022 GUIDANCE CALL MDU LISTED HEMDU RESOURCES | Building a Strong America® NYSE | --- | --- | |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------| | | | | | | | FORWARD-LOOKING STATEMENTS | | | During this presentation, we will make certain "forward-looking | | | ...

MDU Resources Group, Inc. (NYSE:MDU) Q4 2021 Earnings Conference Call February 10, 2022 2:00 PM ET Company Participants Dave Goodin ??? President & Chief Executive Officer David Barney ??? President & Chief Executive Officer???Knife River Corporation Jeff Thiede ??? President & Chief Executive Officer???MDU Construction Services Group Jason Vollmer ??? Vice President & Chief Financial Officer Conference Call Participants Dariusz Lozny ??? Bank of America Ryan Levine ??? Citi Brian Russo ??? Sidoti Andrew L ...

MDU Resources Group, Inc. (NYSE:MDU) Q3 2021 Earnings Conference Call November 4, 2021 2:00 PM ET Company Participants Jason Vollmer - Vice President & Chief Financial Officer Dave Goodin - President & Chief Executive Officer David Barney - President & Chief Executive Officer-Knife River Corporation Jeff Thiede - President & Chief Executive Officer-MDU Construction Services Group Trevor Hastings - President & Chief Executive Officer-WBI Energy Conference Call Participants Dariusz Lozny - Bank of America Ry ...

NOV. 4, 2021 THIRD QUARTER EARNINGS CALL JASON VOLLMER Vice President & Chief Financial Officer ISTED 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 reasonable assumptions, actual results may differ materially. For a discussion of factors that may cause actual results to differ, refer to It ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _____________ to ______________ For the quarterly period ended September 30, 2021 Commission file number 1-03480 OR MDU RESOURCES GROUP INC (Exact name of registrant as specified in its charter) (State or other jurisdi ...

August 5, 2021 SECOND QUARTER EARNINGS CALL JASON VOLLMER Vice President & Chief Financial Officer 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 reasonable assumptions, actual results may differ materially. For a discussion of factors that may cause actual results to differ, refer to Item ...

MDU Resources Group, Inc. (NYSE:MDU) Q2 2021 Earnings Conference Call August 5, 2021 2:00 PM ET Company Participants Jason Vollmer - Vice President and Chief Financial Officer Dave Goodin - President and Chief Executive Officer Dave Barney - President and Chief Executive Officer, Knife River Corporation Jeff Thiede - President and Chief Executive Officer, MDU Construction Services Group Nicole Kivisto - President and Chief Executive Officer, Utility 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 June 30, 2021 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) (State or other jurisdiction ...

MDU Resources Group, Inc. (NYSE:MDU) Q1 2021 Results Conference Call May 6, 2021 2:00 PM ET Company Participants Jason Vollmer - VP & CFO Dave Goodin - President and CEO Dave Barney - President and CEO, Knife River Corporation Jeff Thiede - President and CEO, MDU Construction Services Group Nicole Kivisto - President and CEO, Utility Group Trevor Hastings - President and CEO, WBI Energy Stephanie Barth - VP, Chief Accounting Officer and Controller Conference Call Participants Dariusz Lozny - Bank of America ...