MDU Resources Group is a holding company. Through its subsidiaries, Co. is a regulated energy delivery and construction materials and services business. Co.'s segments include: Electric, which provides electric service in Montana, North Dakota, South Dakota, and Wyoming; Natural Gas Distribution, which sells natural gas in various states; Pipeline, which owns and operates natural gas transmission and storage lines in Minnesota, Montana, North Dakota, South Dakota, and Wyoming; Construction Materials and Contracting, which mines, processes and sells construction aggregates (crushed stone, sand and gravel); and Construction Services, which provides construction services across the country.

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