MDU Resources Group, Inc. (NYSE:MDU) was presented with Edison Electric Institute’s (EEI) annual Index Award for outstanding shareholder return over a five-year period.

“We are delighted to be recognized by EEI as the top ranking small-cap company with a total return of 212 percent for the five-year period ending September 30,” said Terry D. Hildestad, president and chief executive officer of MDU Resources. “This award is the result of the expertise, innovation and hard work of our employees. Our business model, focused on the profitable growth of our energy, construction materials, and utility resources businesses, has created superior value for our shareholders. We continue our long-term focus on the delivery of value-added natural resource products and related services essential to energy and transportation infrastructure.”

The EEI Index of Shareholder-Owned Electric Utilities is a peer group index that values total return on each electric utility, providing a benchmark for long-term financial performance.

“We are pleased and honored to present the EEI Index award to MDU Resources,” said EEI President Thomas R. Kuhn. “The company’s performance during the past five years is a tribute to its operational and financial excellence and provides a shining example of our industry’s strong financial results during that time.”

MDU Resources Group, Inc., 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, operating in three core lines of business; energy, construction materials and utility resources. MDU Resources includes natural gas and oil production, natural gas pipelines and energy services, construction materials and mining, construction services, and electric and natural gas utilities. For more information about MDU Resources, see the company's Web site at www.mdu.com or contact the Investor Relations Department at investor@mduresources.com.


Contact:
   Phyllis A. Rittenbach
   Director of Investor Relations
   (701) 530-1057