CORNERSTONE MEMBERS
MDU Resources Group, Inc.
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MDU Resources Group, Inc. (NYSE: MDU), a Fortune 500 company and a member of the S&P MidCap 400 Index, provides value-added natural resource products and related services that are essential to energy and transportation infrastructure. The company operates in three core lines of business: utility resources, energy and construction materials. MDU Resources includes electric and natural gas utilities, construction services, natural gas and oil production, natural gas pipelines and energy services and construction materials and contracting.
