| 8/31/2010 | NorthWestern Energy Plans Electrical Outage in Harlowton, Mont., on Sept. 1, 2010 |
| 8/27/2010 | NorthWestern Energy Planning Natural Gas System Integrity Work in Red Lodge, Montana |
| 8/24/2010 | NorthWestern Energy Plans Electrical Outage in Billings, Montana, on Sunday, August 29, 2010 |
| 8/24/2010 | NorthWestern Energy Issues Statement About Menno House Explosion |
| 7/29/2010 | NorthWestern Reports Second Quarter 2010 Financial Results |
| 7/26/2010 | NorthWestern Energy Promotes Jim Hartman to Nebraska Region Manager |
| 7/19/2010 | UPDATE: NorthWestern Energy Updates Customers Affected by Lakeside Fire - Monday, July 19, 2010 at 7:45 p.m. |
| 7/19/2010 | Northwestern Energy Updates Information to Customers Affected By Lakeside Fire |
| 7/18/2010 | UPDATE - NorthWestern Energy Updates Customers Affected by Lakeside Fire - Sunday, July 18, 2010 |
| 7/17/2010 | NorthWestern Energy Provides Information to Customers Affected by Lakeside Fire |
| 7/14/2010 | NorthWestern Energy Updates Information About Columbia Falls House Explosion |
| 7/9/2010 | NorthWestern Energy Warns Customers About Telephone Scam |
| 7/9/2010 | NorthWestern Energy Granted Interim Rate Relief |
| 6/30/2010 | NorthWestern to Host Second Quarter 2010 Financial Results Conference Call |
| 6/17/2010 | NorthWestern Energy Plans Outage in Springfield, S.D. |
| 6/10/2010 | NorthWestern Energy Planning Natural Gas System Integrity Work in Red Lodge, Mont. |
| 6/8/2010 | NorthWestern Energy Plans Electrical Outage in Indian Cliffs Subdivision in Billings, Montana, on June 10, 2010 |
| 6/7/2010 | NorthWestern Energy Notifies Park City, Montana, Customers of Planned Power Outage on June 9, 2010 |
| 6/7/2010 | NorthWestern Energy Recognizes June 10 as National Pipeline Safety Day |
| 6/1/2010 | NorthWestern Energy Notifies Hardin, Montana, Customers of Planned Electrical Power Outage on Thursday, June 3, 2010 |
| 5/24/2010 | NorthWestern Energy Notifies Customers of a Planned Power Outage in Butte, Mont. |
| 5/20/2010 | NorthWestern Energy Announces Heather H. Grahame to Join the Company as Vice President and General Counsel |
| 5/11/2010 | Gas Line Work May Delay Traffic at Harrison Avenue and Amherst Wednesday, May 12, 2010 |
| 5/11/2010 | Memorial Fund Established in the Name of Gas Serviceman Jim Hilton |
| 5/10/2010 | NorthWestern Energy Updates Information About Columbia Falls House Explosion |
| 5/7/2010 | NorthWestern Energy Forwards Statement on Behalf of Jim Hilton's Family |
| 5/7/2010 | NorthWestern Energy Updates Information About Columbia Falls House Explosion |
| 5/6/2010 | NorthWestern Energy Sponsors ENERGY STAR® Qualified Homes Workshop |
| 5/6/2010 | Forbes.com Names NorthWestern Energy as one of its Top "100 Most Trustworthy Companies" in America |
| 5/5/2010 | NorthWestern Energy Files Annual Townsend Propane Supply Cost Adjustment |
| 5/4/2010 | NorthWestern Energy to Conduct Maintenance on Electric Transmission System |
| 4/30/2010 | UPDATE 04/30/2010; 4:00 p.m. - NorthWestern Energy Updates Electric Outages in Montana |
| 4/30/2010 | UPDATE 4/30/2010; 11:00 a.m. - NorthWestern Energy Updates Electric Outages in Montana |
| 4/29/2010 | UPDATE 4:30 p.m. - Spring Storms Cause Widespread Electric Outages |
| 4/29/2010 | Spring Storms Cause Widespread Electric Outages; NorthWestern Energy Issues Safety Reminder |
| 4/23/2010 | NorthWestern Reports First Quarter 2010 Results |
| 4/21/2010 | NorthWestern Energy Kicks Off Bright Future Challenge on Earth Day |
| 4/15/2010 | Fitch Ratings Upgrades NorthWestern's Credit Ratings |
| 4/12/2010 | Addition of NorthWestern to a Small Cap Index Influences Trading Volume |
| 3/31/2010 | NorthWestern to Host First Quarter 2010 Financial Results Conference Call |
| 3/24/2010 | NorthWestern Corporation Reports Change in Tax Status of Dividends Paid in 2009 |
| 3/22/2010 | Open Season Informational Meetings Pre-Registration Reminder |
| 3/15/2010 | Open Season Information Meetings Pre-Registration Underway |
| 2/25/2010 | NorthWestern Energy to Move Brookings, South Dakota, Area Office to New Building on March 1 |
| 2/25/2010 | NorthWestern Energy Announces Open Season Informational Meetings |
| 2/12/2010 | NorthWestern Reports 2009 Financial Results |
| 2/2/2010 | Make Energy Billing a Little Easier and Register to Win a New Television |
| 2/2/2010 | NorthWestern Energy Unveils New Bill for Montana Customers |
| 1/28/2010 | NorthWestern to Host Year-End 2009 Financial Results Conference Call |
| 1/28/2010 | NorthWestern Energy Offers Tips for Choosing an Energy Efficiency Contractor |
| 1/22/2010 | NorthWestern Energy Encourages Montana Customers to Prepare for Major Winter Storm |
| 1/22/2010 | NorthWestern Energy Encourages Customers to be Prepared for Ice Storm Predicted to Affect Service Territory Over Weekend |
| 1/18/2010 | NorthWestern Energy Hosts MSTI Open Houses in Butte and Anaconda, Montana |
| 1/15/2010 | NorthWestern Energy Plans Outages in Doland, SD, Area for House Move |
| 1/15/2010 | NorthWestern Energy Submits Supplemental Filing to Montana Public Service Commission |
| 1/13/2010 | New Transmission Development Benefits Montana’s Economy |
| 1/6/2010 | NorthWestern Energy Hosts MSTI Open Houses |
| 1/4/2010 | NorthWestern Energy Hosts MSTI Open House in Dillon, Mont. |
| 1/4/2010 | NorthWestern Energy Hosts MSTI Open House in Whitehall, Mont. |
| 1/4/2010 | NorthWestern Energy Hosts MSTI Open House in Townsend, Mont. |
| 1/4/2010 | NorthWestern Energy Hosts MSTI Open House in Boulder, Mont. |