MDU Resources Group, Inc.

MDU Resources Group Inc operates in three business segments, which include the electric segment, which generates, transmits, and distributes electricity in Montana, North Dakota, South Dakota, and Wyoming; The natural gas distribution segment distributes natural gas in those states, as well as in Idaho, Minnesota, Oregon, and Washington; The pipeline segment provides natural gas transportation and underground storage services through a regulated pipeline system in the Rocky Mountain and northern Great Plains regions of the United States.