MDU Resources Group, Inc. · Bismarck, ND United States ·(NYSE: MDU)

MDU Resources has branched out from its roots as a regional utility. The company's biggest revenue producer is its construction materials and contracting division (including Knife River) which mines and sells concrete, gravel, and other building materials. MDU Resources' energy businesses include natural gas transmission, gathering, and storage; energy marketing; and oil and gas exploration and production. Its utility subsidiaries, Montana-Dakota Utilities, Great Plains Natural Gas and Cascade Natural Gas, deliver natural gas to more than 822,000 customers and electricity to more than 121,000 customers. Its MDU Construction Services unit builds power lines, pipelines, and telecom systems. To read the full description, subscribe now.