| Date | Event |
| 24-Nov-09 | ARCSIGHT INC Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 10-Nov-09 | Price hit new 52-week high ($27.10) |
| 9-Nov-09 | Price hit new 52-week high ($27.00) |
| 6-Nov-09 | Price hit new 52-week high ($26.79) |
| 18-Sep-09 | Coverage initiated on ArcSight by William Blair |
| 9-Sep-09 | ARCSIGHT INC Files SEC form 10-Q, Quarterly Report |
| 3-Sep-09 | ARCSIGHT INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 4-Aug-09 | ARCSIGHT INC Files SEC form 8-K, Change in Directors or Principal Officers |
| 9-Jul-09 | ARCSIGHT INC Files SEC form 10-K, Annual Report |
| 17-Jun-09 | ARCSIGHT INC Files SEC form 8-K, Change in Directors or Principal Officers |
| 11-Jun-09 | ARCSIGHT INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 27-May-09 | ARCSIGHT INC Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 16-Mar-09 | ARCSIGHT INC Files SEC form 8-K, Change in Directors or Principal Officers |
| 12-Mar-09 | ARCSIGHT INC Files SEC form 10-Q, Quarterly Report |
| 5-Mar-09 | ARCSIGHT INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 12-Dec-08 | ARCSIGHT INC Files SEC form 10-Q, Quarterly Report |
| 9-Dec-08 | ARCSIGHT INC Files SEC form 8-K, Results of Operations and Financial Condition |