MDU Resources Group, Inc.

MDU Resources provides essential products and services through its regulated energy delivery and construction services businesses. Our company was founded in 1924 as a small electric utility serving a handful of farm communities on the border of Montana and North Dakota. We realized early the value of delivering a variety of services and grew our company by developing businesses around our expertise. Today, MDU Resources has operations, customers and employees across the country. We have more than 11,000 employees` and conduct business in nearly every state. We are the largest publicly traded company headquartered in North Dakota. Our stock has traded since 1948 under the symbol MDU on the New York Stock Exchange.