MDU Resources Group, Inc.

Chairman of MDU Resources Board of Directors; retired, formerly chairman of Hughes Electronics Corp., a unit of General Motors Corp., and former vice chairman and director of GM; a director of several major corporations.

President and Chief Executive Officer; formerly chief operating officer of MDU Resources and formerly president and chief executive officer of Knife River Corp.

President and chairman of The Everist Co., a construction materials company; a director of several corporations.

Vice president of DOWL HKM, formerly president and majority owner of HKM Engineering Inc. and vice president of operations for Mountain States Energy Inc.; on the boards of several organizations.

Retired, formerly managing director of Private Markets Group of UBS Asset Management; on the boards of several organizations.

Chairman and chief executive officer of TMI Systems Design Corp., a custom institutional furniture manufacturer; a former director of Federal Reserve Bank of Minneapolis.

President of Tom Knudson Interests LLC, providing consulting services in energy, sustainable development and leadership; former senior vice president of human resources, information management and communications of ConocoPhillips.

Founder and former chairman, president and chief executive officer of Prima Energy Corp., a natural gas and oil exploration and production company, and chairman of Entre Pure Industries Inc., a privately held purified water and ice business; a board member of Colorado Oil and Gas Association and a director of Colorado State Bank and Trust.

President, chief executive officer and a director of Cascade Bancorp and Bank of the Cascades; a director of several other corporations.

Former president of Durham Resources LLC, a privately held financial management company, and president of Durham Foundation; a director of a mutual fund.

President and Chief Executive Officer, MDU Resources. Serves on the company’s Board of Directors and as chairman of the board of all major subsidiary companies; formerly chief operating officer of MDU Resources and formerly president and chief executive officer of Knife River Corp.

President and Chief Executive Officer, WBI Holdings Inc. Formerly held executive and management positions with WBI Holdings.

Vice President of Human Resources, MDU Resources. Formerly director of compensation and executive programs of MDU Resources.

President and Chief Executive Officer, Montana-Dakota Utilities Co., Great Plains Natural Gas Co., Cascade Natural Gas Corp. and Intermountain Gas Co. Formerly executive vice president of operations and acquisitions with Montana-Dakota.

Chief Executive Officer, MDU Construction Services Group Inc. and Knife River Corp. Formerly owned construction services companies that were acquired by MDU Resources.

Vice President of Administration, MDU Resources. Formerly associate general council of MDU Resources.

General Counsel and Secretary, MDU Resources. Serves as general counsel and secretary of all major company subsidiaries; formerly senior attorney and held other positions of increasing responsibility with MDU Resources.

Executive Vice President of Bakken Development, MDU Resources. Formerly president and chief executive officer of Knife River Corp.

Vice President and Chief Financial Officer, MDU Resources. Serves as senior financial officer and member of the boards of directors of all major subsidiary companies; formerly chief accounting officer of MDU Resources.

President and Chief Executive Officer, Fidelity Exploration & Production Co. Formerly an executive with one of the world’s largest oil and natural gas production companies.

Vice President of Renewable Resources, MDU Resources.

Vice President, Controller and Chief Accounting Officer, MDU Resources.

Treasurer and Assistant Secretary, MDU Resources.

Vice President of Strategic Planning, MDU Resources.