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) (State or other jurisdiction of ...

MDU Resources Group, Inc. (NYSE:MDU) Q3 2022 Results Conference Call November 3, 2022 8:30 AM ET Company Participants Jason Vollmer - VP and CFO Dave Goodin - President and CEO Jeff Thiede - President and CEO, MDU Construction Services Group Dave Barney - President and CEO of Knife River Corporation Conference Call Participants Brian Russo - Sidoti Ryan Levine - Citibank Dariusz Lozny - Bank of America Operator Hello. My name is Lisa, and I will be your conference facilitator. At this time, I would like to ...

FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 For the quarterly period ended September 30, 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) (State or other jurisdi ...

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, 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 Indicate by check mark whether the registrant has submitted electronically every In ...

MDU Resources Group, Inc. (NYSE:MDU) Q2 2022 Results Conference Call August 4, 2022 8:30 AM ET Company Participants Jason Vollmer - VP and CFO Dave Goodin - President and CEO, MDU Resources Dave Barney - President and CEO, Knife River Corporation Jeff Thiede - President and CEO, MDU Construction Services Group Nicole Kivisto - President and CEO, Utilities Group Trevor Hastings - President and CEO of WBI Energy Stephanie Barth - Chief Accounting Officer and Controller of MDU Resources Conference Call Partici ...

EMDU RESOURCES Building a Strong America® August 4, 2022 SECOND QUARTER EARNINGS CALL NYSE MDU Resources is Building a Strong America® Vision: With integrity, Building a Strong America® while being a great and safe place to work Mission: Delivering superior value to stakeholders by providing essential infrastructure and services to America Company founded in 1924 Headquartered in Bismarck, ND Utilities Regulated Pipeline Construction Materials Construction Services Building a Strong America® 2 LEADERSHIP TE ...

EMDU RESOURCES Building a Strong America® May 5, 2022 FIRST QUARTER EARNINGS CALL NYSE | --- | --- | |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------| | | | | FORWARD-LOOKING STATEMENTS | | | During this presentation, we will make certain "forward-looking | | | statements" within the meani ...

MDU Resources Group, Inc. (NYSE:MDU) Q1 2022 Results Conference Call May 5, 2022 2:00 PM ET Company Participants Jason Vollmer - VP and CFO Dave Goodin - President and CEO, MDU Resources Dave Barney - President and CEO, Knife River Corporation Jeff Thiede - President and CEO, MDU Construction Services Group Nicole Kivisto - President and CEO, Utilities Group Conference Call Participants Dariusz Lozny - Bank of America Ryan Levine - Citi Brent Thielman - D.A. Davidson Brian Russo - Sidoti Operator Hello. My ...

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, 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) (State or other jurisdictio ...

MARCH 2022 INVESTOR PRESENTATION MDU LISTED HEMDU RESOURCES | Building a Strong America® NYSE SAFE HARBOR STATEMENT & DISCLOSURES This presentation includes forward-looking comments subject to important risks and uncertainties. It may also contain financial measures that are not in conformance with accounting principles generally accepted in the United States (GAAP). Refer to MDU Resources' reports filed on Forms 8-K (current), 10-Q(quarterly), and 10-K (annual) for information on factors that could cause a ...