MDU Resources Group Investor Presentation — August 2024

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Second Quarter Earnings Call

1Forward -Looking Statement

This presentation includes “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 1A – Risk Factors in

the company’s most recent Form 10 -K and Form 10 -Q.

2Company Information Investor Contact

MDU Resources Group, Inc.

Bismarck, ND 58506 -5650

NYSE: MDU Brent Miller

Assistant Treasurer and Director, Financial Projects & Investor Relations

brent.miller@mduresources.com or investor@mduresources.comLeadership Team

Vice President, CFO & Treasurer

Vice President, CAO & ControllerJeff Thiede

Chief Utilities Officer

4Compelling Investment Opportunity

5•Focusing on our “CORE”

•Strong regulated business mix

•Extensive operational diversification

•Supportive regulatory environment

•Experienced management team with proven track

•Compelling long -term guidance with differentiated

growth targets•One of the largest electrical construction service

providers in the U.S.

•Essential infrastructure service provider

•Competitive positioning and industry tailwinds

support future growth

•Strong cash flow provides optionality

•Distinct investment opportunity as an

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