| 2008 |
| | 9/15/2008 |
MDU Resources Reports Estimate of Probable and Possible Natural Gas and Oil Reserves |
| | 9/2/2008 |
MDU Resources to Present at the D.A. Davidson Engineering & Construction Conference |
| | 8/28/2008 |
MDU Resources pipeline subsidiary to expand Grasslands Pipeline |
| | 8/27/2008 |
MDU Resources Group Names Bill Connors Vice President – Renewable Resources |
| | 8/14/2008 |
MDU Resources Increases Common Stock Dividend 6.9 Percent |
| | 8/14/2008 |
A. Bart Holaday, Thomas C. Knudson Elected to MDU Resources Board of Directors |
| | 8/4/2008 |
MDU Resources’ Second Quarter Earnings from Continuing Operations Grow 41 Percent to Record Level; Company Raises 2008 Earnings Guidance |
| | 7/28/2008 |
MDU Resources Reports Positive Initial Results From Three Forks/Sanish Well |
| | 7/9/2008 |
MDU Resources Announces Webcast of Second Quarter 2008 Earnings Conference Call |
| | 7/1/2008 |
MDU Resources pipeline subsidiary announces plans to expand delivery volumes out of the Powder River Basin |
| | 7/1/2008 |
MDU Resources to Acquire Intermountain Gas Company |
| | 5/20/2008 |
Dave Goodin Named CEO of MDU Resources Group’s Utility Businesses |
| | 5/19/2008 |
Williston Basin Interstate Pipeline announces plans to develop natural gas pipeline out of Bakken production region |
| | 5/16/2008 |
MDU Resources Acquires Amador Transit Mix, Inc. |
| | 5/15/2008 |
MDU Resources Declares Quarterly Dividend on Common and Preferred Stock |
| | 5/9/2008 |
MDU Resources Acquires Yarbrough’s Material & Construction |
| | 5/8/2008 |
MDU Resources Announces Director’s Intent to Sell Stock |
| | 5/2/2008 |
MDU Resources’ First Quarter 2008 Earnings from Continuing Operations |
| | 4/29/2008 |
MDU Resources to Present at the American Gas Association Financial Forum |
| | 4/22/2008 |
MDU Resources Shareholders Hear Optimistic Outlook for 2008; Re-elect Three Members to Board of Directors |
| | 4/14/2008 |
MDU Resources Announces Webcast of First Quarter 2008 Earnings Conference Call |
| | 4/7/2008 |
Positive Initial Results Reported from Bakken Wells |
| | 4/4/2008 |
MDU Resources to Present at IPAA’s Oil & Gas Investment Symposium |
| | 3/11/2008 |
MDU Resources Celebrates 60 Years on NYSE - President and CEO Hildestad to Ring The Opening Bell(sm) |
| | 2/27/2008 |
MDU Resources to Present at Construction Materials Conference |
| | 2/14/2008 |
MDU Resources Declares Quarterly Dividend on Common Stock and Preferred Stock |
| | 1/29/2008 |
MDU Resources Announces Analyst Seminar Webcast |
| | 1/25/2008 |
MDU Resources’ 2007 Earnings Grow 37 Percent to Record Level |
| | 1/24/2008 |
Pipeline expansion project proposed |
| | 1/17/2008 |
Montana-Dakota Utilities Co. President and CEO Bruce Imsdahl Announces Retirement |
| | 1/8/2008 |
Webcast of Year-End 2007 Earnings Conference Call Announced |
| | 1/8/2008 |
MDU Resources Announces Agreement to Purchase East Texas Natural Gas Production Assets |
| 2007 |
| | 12/3/2007 |
MDU Resources Initiates 2008 Earnings Guidance, Updates 2007 |
| | 11/15/2007 |
MDU Resources Declares Quarterly Dividend on Common Stock and Preferred Stock |
| | 11/13/2007 |
MDU Resources Announces Webcast of Dec. 4 Conference Call |
| | 11/6/2007 |
Energy sector growth opportunities for MDU Resources |
| | 11/5/2007 |
MDU Resources Receives EEI Index Award for Outstanding Shareholder Return |
| | 10/31/2007 |
MDU Resources Announces Webcast of EEI Conference Presentation |
| | 10/23/2007 |
MDU Resources Reports Record Third Quarter Earnings; Updates Earnings Guidance |
| | 10/1/2007 |
MDU Resources Announces Webcast of Third Quarter 2007 Earnings Conference Call |
| | 9/27/2007 |
MDU Resources Names Mark Del Vecchio Vice President of Human Resources |
| | 9/11/2007 |
Webcast of Construction Materials and Construction Services Conference Presentation Announced |
| | 9/6/2007 |
MDU Resources Acquires Quality Concrete & Materials |
| | 8/31/2007 |
MDU Resources Acquires Star Aggregates, Inc. |
| | 8/27/2007 |
MDU Resources Announces Webcast of Energy/Power Conference Presentation |
| | 8/16/2007 |
MDU Resources Increases Common Stock Dividend 7.4 Percent |
| | 8/2/2007 |
MDU Resources Acquires Lone Mountain Excavation |
| | 7/24/2007 |
MDU Resources Reports Record Second Quarter 2007 Consolidated Earnings, Increases Earnings Guidance |
| | 7/19/2007 |
MDU Resources Reports Estimate of Probable and Possible Natural Gas and Oil Reserves |
| | 7/16/2007 |
MDU Resources Promotes Cynthia Norland to Vice President of Administration |
| | 7/10/2007 |
MDU Resources Closes Sale of Domestic IPP Companies |
| | 7/6/2007 |
MDU Resources Acquires Ames Sand & Gravel, Inc. |
| | 7/3/2007 |
MDU Resources Announces Webcast of Second Quarter 2007 Earnings Conference Call |
| | 7/3/2007 |
Goodin, Imsdahl named to executive positions at Cascade Natural Gas |
| | 7/2/2007 |
Cascade Natural Gas Corp. merger completed; company joins MDU Resources Group |
| | 6/28/2007 |
MDU Resources Group receives final regulatory approval for Cascade Natural Gas merger |
| | 5/17/2007 |
MDU Resources Declares Common Stock Dividend |
| | 5/8/2007 |
MDU Resources Files Regulatory Stipulations |
| | 5/7/2007 |
MDU Resources announces director’s intent to sell stock |
| | 4/26/2007 |
MDU Resources announces sale of domestic IPP companies |
| | 4/23/2007 |
MDU Resources Reports First Quarter 2007 Consolidated Earnings, Increases Earnings Guidance |
| | 4/16/2007 |
MDU Resources Announces Webcasts of Annual Stockholders Meeting and Financial Forum Presentation |
| | 4/9/2007 |
MDU Resources Announces Webcast of First Quarter 2007 Earnings Conference Call |
| | 2/21/2007 |
MDU Resources to Present at Construction Materials Conference |
| | 2/15/2007 |
MDU Resources Declares Common Stock Dividend |
| | 2/7/2007 |
MDU Resources Announces Analyst Seminar Webcast |
| | 1/9/2007 |
MDU Resources Retains Investment Bank As It Explores Divesting Domestic Independent Power Production Assets |
| 2006 |
| | 12/5/2006 |
MDU Resources Reaffirms 2006 and Initiates 2007 Earnings Guidance |
| | 11/16/2006 |
MDU Resources Declares Common Stock Dividend |
| | 11/1/2006 |
MDU Resources Announces Webcast of Dec. 6 Analyst Meeting |
| | 10/27/2006 |
MDU Resources Names Stumpf Vice President of Strategic Planning |
| | 10/27/2006 |
Cascade shareholders approve merger agreement with MDU Resources |
| | 10/25/2006 |
MDU Resources Announces Webcast of EEI Conference Presentation |
| | 10/23/2006 |
Q3 2006 Earnings Release |
| | 10/11/2006 |
MDU Resources Announces Webcast of Third Quarter 2006 Earnings Conference Cal |
| | 9/5/2006 |
MDU Resources Acquires California-Based Asphalt Oil Terminal |
| | 8/29/2006 |
MDU Resources Announces Webcast of Energy/Power Conference Presentation |
| | 8/17/2006 |
MDU Resources Names Hildestad President, CEO and Director |
| | 8/17/2006 |
MDU Resources Names Pearce Chairman of the Board |
| | 8/17/2006 |
MDU Resources CEO and Chairman White Retires |
| | 8/17/2006 |
MDU Resources Increases Common Stock Dividend 6.55 Percent |
| | 8/16/2006 |
MDU Resources purchases share of transmission line business in Brazil |
| | 7/28/2006 |
MDU Resources Reports Second Quarter 2006 Consolidated Earnings, Increases 2006 Earnings Guidance |
| | 7/9/2006 |
MDU Resources to Acquire Cascade Natural Gas |
| | 7/7/2006 |
MDU Resources Announces Webcast of Second Quarter 2006 Earnings Conference Call |
| | 5/11/2006 |
MDU Resources Declares Common Stock Dividend |
| | 5/11/2006 |
MDU Resources Announces Three-For-Two Stock Split |
| | 5/1/2006 |
MDU Resources Announces Purchase of Big Horn Basin Oil and Natural Gas Production Assets |
| | 4/24/2006 |
MDU Resources Reports Record First Quarter 2006 Consolidated Earnings, Increases Earnings Guidance |
| | 4/19/2006 |
MDU Resources’ Centennial Power Acquires Member Interests of San Joaquin Cogen |
| | 4/11/2006 |
MDU Resources Announces Webcasts of First Quarter 2006 Conference Call and Annual Stockholders Meeting |
| | 4/3/2006 |
MDU Construction Services Group Acquires Desert Fire Holdings, Inc. |
| | 3/31/2006 |
MDU Resources’ Wood retires after 32 years of service |
| | 3/7/2006 |
MDU Resources Names Schwartz Vice President and Chief Accounting Officer |
| | 3/1/2006 |
MDU Resources Responds to S&P Changing Credit Rating |
| | 2/17/2006 |
MDU Resources names Bietz CEO of WBI Holdings, Inc. |
| | 2/17/2006 |
MDU Resources names Castleberry executive vice president of administration |
| | 2/16/2006 |
MDU Resources Declares Common Stock Dividend |
| | 2/3/2006 |
MDU Resources Announces Analyst Seminar Webcast |
| | 1/27/2006 |
MDU Resources Announces Record Earnings |
| | 1/10/2006 |
MDU Resources Names Moylan Chief Accounting Officer |
| | 1/6/2006 |
MDU Resources Announces Webcast of Year-End 2005 Conference Call |
| 2005 |
| | 11/30/2005 |
MDU Resources Increases Earnings Guidance for 2005, Provides 2006 Earnings Guidance |
| | 11/30/2005 |
MDU Resources Names Kivisto Controller |
| | 11/23/2005 |
MDU Resources names Bietz president of WBI Holdings, Inc. |
| | 11/22/2005 |
Fagg Named to MDU Resources Board |
| | 11/22/2005 |
Lewis Named to MDU Resources Board |
| | 11/22/2005 |
MDU Resources’ Raile promoted to CFO, Robinson to retire |
| | 11/17/2005 |
MDU Resources Foundation developing energy conservation grants |
| | 11/17/2005 |
MDU Resources Declares Common Stock Dividend |
| | 11/15/2005 |
MDU Resources Announces Webcast of Analyst Meeting |
| | 11/2/2005 |
MDU Resources Announces Webcast of EEI Conference Presentation |
| | 10/20/2005 |
MDU Resources Reports Record Third Quarter 2005 Consolidated Earnings, Increases Earnings Guidance for 2005 |
| | 10/6/2005 |
MDU Resources Announces Webcast of Third Quarter 2005 Conference Call |
| | 10/3/2005 |
MDU Resources Announces Acquisition of Iowa-based Asphalt Terminal and Construction Materials Companies |
| | 9/19/2005 |
MDU Resources Increases Earnings Guidance |
| | 8/31/2005 |
MDU Resources Announces Webcast of Energy/Power Conference Presentation |
| | 8/12/2005 |
MDU Resources Names Schwartz Assistant Vice President – Special Projects |
| | 8/11/2005 |
MDU Resources Increases Common Stock Dividend 5.6 Percent |
| | 8/10/2005 |
MDU Resources Sees Highway Bill as Good News, Encouraged by Energy Policy Bill |
| | 8/1/2005 |
MDU Resources Vice President - Corporate Communications Retires |
| | 7/21/2005 |
MDU Resources Reports Higher Second Quarter 2005 Consolidated Earnings, Increases Earnings Guidance |
| | 7/7/2005 |
MDU Resources Announces Webcast of Second Quarter 2005 Conference Call |
| | 6/17/2005 |
MDU Resources Acquires Las Vegas Mechanical Contractor |
| | 6/10/2005 |
MDU Resources Acquires Las Vegas-based Company |
| | 6/9/2005 |
MDU Resources Responds to Court Orders; Reaffirms EPS Guidance |
| | 6/9/2005 |
MDU Resources Announces Acquisition of Seven Related Oregon Companies |
| | 6/3/2005 |
MDU Resources Reaffirms EPS Guidance of $1.80 to $2.00 |
| | 6/1/2005 |
MDU Resources Announces Acquisition of Norm’s Utility Contractor Inc. |
| | 6/1/2005 |
MDU Resources Studying 9th Circuit Court Order |
| | 5/23/2005 |
MDU Resources to Present at The Wall Street Analyst Forum |
| | 5/12/2005 |
MDU Resources Declares Common Stock Dividend |
| | 4/29/2005 |
MDU Resources Releases Details on South Texas Production Asset Acquisition and Increases Long-Term Compound Annual Growth Goals |
| | 4/25/2005 |
MDU Resources Announces Agreement to Acquire South Texas Production Assets |
| | 4/19/2005 |
MDU Resources Reports First Quarter 2005 Consolidated Earnings and Increases Earnings Guidance for 2005 |
| | 4/19/2005 |
MDU Resources Announces Webcasts of Annual Stockholders Meeting and Financial Forum Presentation |
| | 4/6/2005 |
Schneider Named Knife River President and CEO |
| | 4/6/2005 |
MDU Resources Announces Webcast of First Quarter 2005 Conference Call |
| | 4/4/2005 |
MDU Resources Names Hildestad President and Chief Operating Officer |
| | 3/24/2005 |
MDU Resources Announces Agreement to Sell Termoceará to Petrobras |
| | 2/17/2005 |
MDU Resources Declares Common Stock Dividend |
| | 2/14/2005 |
MDU Resources Announces Analyst Seminar Webcast |
| | 2/10/2005 |
MDU Resources Director Scott Retires |
| | 1/28/2005 |
MDU Resources Announces Record Earnings |
| | 1/18/2005 |
MDU Resources Involved in Contract Negotiations in Brazil |
| | 1/6/2005 |
MDU Resources Announces Webcast of Year-End 2004 Conference Call |