| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13D/A | 2008-01-10 | FRANKLIN MUTUAL ADVISERS LLC | NORTHWESTERN CORP | 1,569,315 | 4.2% | EDGAR |
| SC 13G | 2007-12-27 | KING STREET CAPITAL MGMT LLC | NORTHWESTERN CORP | 630,000 | 1.7% | EDGAR |
| SC 13G/A | 2007-09-07 | DEUTSCHE BANK AG\ | NORTHWESTERN CORP | 1,435,323 | 4.0% | EDGAR |
| SC 13G/A | 2007-08-20 | ZIMMER LUCAS CAPITAL LLC | NORTHWESTERN CORP | 1,974,312 | 5.5% | EDGAR |
| SC 13G | 2007-08-03 | ZIMMER LUCAS CAPITAL LLC | NORTHWESTERN CORP | 2,752,369 | 7.7% | EDGAR |
| SC 13D/A | 2007-07-03 | DEUTSCHE BANK AG\ | NORTHWESTERN CORP | 1,774,833 | 4.9% | EDGAR |
| SC 13D/A | 2007-06-22 | DEUTSCHE BANK AG\ | NORTHWESTERN CORP | 2,200,299 | 6.1% | EDGAR |
| SC 13D/A | 2007-06-11 | DEUTSCHE BANK AG\ | NORTHWESTERN CORP | 2,646,282 | 7.4% | EDGAR |
| SC 13G | 2007-06-08 | LEHMAN BROTHERS HOLDINGS INC | NORTHWESTERN CORP | - | - | EDGAR |
| SC 13G/A | 2007-02-14 | ROTH MICHAEL | NORTHWESTERN CORP | - | - | EDGAR |
| SC 13G | 2007-02-14 | ANGELO GORDON & CO LP/NY | NORTHWESTERN CORP | 2,500,000 | 7.0% | EDGAR |
| SC 13G | 2007-02-02 | DEUTSCHE BANK AG\ | NORTHWESTERN CORP | 2,177,413 | 6.1% | EDGAR |
| SC 13D/A | 2006-12-08 | DEUTSCHE BANK AG\ | NORTHWESTERN CORP | 2,251,611 | 6.3% | EDGAR |
| SC 13D | 2006-12-04 | DEUTSCHE BANK AG\ | NORTHWESTERN CORP | 2,251,611 | 6.3% | EDGAR |
| SC 13G/A | 2006-09-13 | FORTRESS INVESTMENT GROUP LLC | NORTHWESTERN CORP | - | 0.2% | EDGAR |
| SC 13G | 2006-08-30 | ROTH MICHAEL | NORTHWESTERN CORP | 1,863,499 | 5.3% | EDGAR |
| SC 13G | 2006-08-30 | FORTRESS INVESTMENT GROUP LLC | NORTHWESTERN CORP | - | 0.2% | EDGAR |
| SC 13D/A | 2006-08-10 | FORTRESS INVESTMENT GROUP LLC | NORTHWESTERN CORP | - | 0.1% | EDGAR |
| SC 13G/A | 2006-08-10 | FMR CORP | NORTHWESTERN CORP | 0 | 0.0% | EDGAR |
| SC 13D/A | 2006-05-16 | HARBINGER CAPITAL PARTNERS MASTER FUND I, LTD. | NORTHWESTERN CORP | 1,750,000 | 4.9% | EDGAR |