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 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 For the quarterly period ended March 31, 2021 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 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 jurisdictio ...

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, 2020 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. 4, 2021 2020 EARNINGS & 2021 GUIDANCE CALL JASON VOLLMER Vice President & Chief Financial Officer MDU LISTED MDU RESOURCES | Building a Strong America® | NYSE 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 o ...

MDU Resources Group, Inc. (NYSE:MDU) Q4 2020 Results Earnings Conference Call February 4, 2021 2:00 PM ET Company Participants Jason Vollmer - VP, CFO and Treasurer 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 Chri ...

MDU Resources Group, Inc. (NYSE:MDU) Q3 2020 Earnings Conference Call November 5, 2020 2:00 PM ET Company Participants Jason Vollmer - VP, CFO and Treasurer 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 Ryan Levine ...

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, 2020 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 jurisdi ...