| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2009-02-17 | JGD MANAGEMENT CORP /NY | ARROWHEAD RESEARCH CORP | 1,689,145 | 3.8% | EDGAR |
| SC 13G/A | 2008-02-14 | FMR LLC | ARROWHEAD RESEARCH CORP | 5,062,607 | 13.0% | EDGAR |
| SC 13G/A | 2008-02-13 | KNOTT DAVID M | ARROWHEAD RESEARCH CORP | 357,143 | 0.9% | EDGAR |
| SC 13G/A | 2008-01-18 | JGD MANAGEMENT CORP /NY | ARROWHEAD RESEARCH CORP | 3,698,290 | 9.3% | EDGAR |
| SC 13G | 2007-06-11 | FMR CORP | ARROWHEAD RESEARCH CORP | 4,240,931 | 11.8% | EDGAR |
| SC 13G/A | 2007-02-14 | KNOTT DAVID M | ARROWHEAD RESEARCH CORP | 4,571,174 | 13.2% | EDGAR |
| SC 13G/A | 2007-02-14 | JGD MANAGEMENT CORP /NY | ARROWHEAD RESEARCH CORP | 5,150,786 | 14.6% | EDGAR |
| SC 13G | 2006-02-10 | JGD MANAGEMENT CORP /NY | ARROWHEAD RESEARCH CORP | 4,161,429 | 12.4% | EDGAR |
| SC 13G/A | 2006-02-01 | KNOTT DAVID M | ARROWHEAD RESEARCH CORP | 4,102,881 | 12.1% | EDGAR |
| SC 13G | 2005-04-29 | KNOTT DAVID M | ARROWHEAD RESEARCH CORP | 993,925 | 6.3% | EDGAR |