| Date Filed | Type | Description |
| 02/13/2013 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings: |
| 11/14/2012 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 08/14/2012 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 05/15/2012 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/14/2012 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 11/14/2011 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 08/15/2011 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 05/16/2011 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/14/2011 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/14/2011 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 11/15/2010 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 08/16/2010 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 05/17/2010 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/16/2010 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/16/2010 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/16/2010 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 11/13/2009 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 08/28/2009 |
SC 13G
| ZIMMER LUCAS CAPITAL LLC reports a 5.7% stake in MV Oil Trust |
| 08/14/2009 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 05/15/2009 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/17/2009 |
SC 13G/A
| Form SC 13G/A -- Statement of acquisition of beneficial ownership by individuals [amend] |
| 02/17/2009 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 11/14/2008 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 08/14/2008 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 06/25/2008 |
13F-HR/A
| Form 13F-HR/A - Quarterly report filed by institutional managers, Holdings [Amend] |
| 05/14/2008 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/14/2008 |
SC 13G/A
| ZIMMER LUCAS CAPITAL LLC reports a 10% stake in NorthWestern Corporation |
| 02/13/2008 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 11/14/2007 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 08/20/2007 |
SC 13G/A
| ZIMMER LUCAS CAPITAL LLC reports a 8.6% stake in NorthWestern Corporation |
| 08/14/2007 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 08/03/2007 |
SC 13G
| ZIMMER LUCAS CAPITAL LLC reports a 7.7% stake in NorthWestern Corporation |
| 05/15/2007 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
| 02/14/2007 |
13F-HR
| Form 13F-HR - Quarterly report filed by institutional managers, Holdings |
|