MDU Resources Group Inc is a diversified company that provides essential services across the United States. It operates in sectors including energy delivery, construction materials, and services. The company generates and distributes electricity and natural gas to residential, commercial, industrial, and municipal customers in several states. Additionally, MDU Resources offers construction services such as electrical and mechanical contracting, and manufactures equipment for construction projects. With a history dating back to 1924 and headquartered in Bismarck, North Dakota, MDU Resources is committed to delivering reliable services and infrastructure essential for growth and development.