| Date Filed | Type | Description |
| 11/03/2010 |
15-12B
| Form 15-12B - Securities registration termination [Section 12(b)] |
| 10/27/2010 |
SC 13D/A
| Form SC 13D/A - General statement of acquisition of beneficial ownership: [Amend] |
| 10/25/2010 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/25/2010 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/25/2010 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/25/2010 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments |
| 10/22/2010 |
8-K
| Quarterly results |
| 10/22/2010 |
SC 13D/A
| Form SC 13D - General statement of acquisition of beneficial ownership [amend] |
| 10/22/2010 |
25-NSE
| Form 25-NSE - |
| 10/21/2010 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 10/19/2010 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 10/14/2010 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 10/13/2010 |
SC 13D
| Form SC 13D - General statement of acquisition of beneficial ownership |
| 10/12/2010 |
SC 13D
| ArcSight Inc reports a 6.5% stake in ARCSIGHT, INC. |
| 10/05/2010 |
SC TO-T/A
| Form SC TO-T - Tender offer statement by Third Party [amend] |
| 09/22/2010 |
SC 14D9
| Form SC 14D9 - Solicitation, recommendation statements |
| 09/22/2010 |
SC TO-T
| Form SC TO-T - Tender offer statement by Third Party |
| 09/20/2010 |
SC TO-C
| Form SC TO-C - Written communication relating to an issuer or third party |
| 09/20/2010 |
MW
| FoxT Joins ArcSight Technology Partner Program |
| 09/20/2010 |
MW
| Narus and ArcSight Partner to Provide Enhanced Enterprise Threat and Risk Management |
| 09/20/2010 |
BW
| ArcSight Announces ArcSight Protect ??10 Conference |
| 09/19/2010 |
BW
| Bull & Lifshitz, LLP Announces Investigation of the Acquisition of ArcSight, Inc. |
| 09/17/2010 |
SC14D9C
| Form SC14D9C - Written communication relating to third party tender offer |
| 09/15/2010 |
SC TO-C
| Form SC TO-C - Written communication relating to an issuer or third party |
| 09/14/2010 |
SC14D9C
| Form SC14D9C - Written communication relating to third party tender offer |
| 09/13/2010 |
SC14D9C
| Form SC14D9C - Written communication relating to third party tender offer |
| 09/13/2010 |
SC TO-C
| Form SC TO-C - Written communication relating to an issuer or third party |
| 09/13/2010 |
SC TO-C
| Form SC TO-C - Written communication relating to an issuer or third party |
| 09/13/2010 |
8-K
| Form 8-K - Current report |
| 09/13/2010 |
SC TO-C
| Form SC TO-C - Written communication relating to an issuer or third party |
| 09/13/2010 |
BW
| ArcSight to Cancel Appearance at Upcoming Investor Conferences and Adjourn Annual Stockholders Meeting |
| 09/13/2010 |
BW
| The Law Office of Abe Shainberg Announces an Investigation into the Possible Breaches of Fiduciary Duty by the Board of ArcSight, Inc. in Connection with the Sale of the Company to Hewlett-Packard Co. - ARST |
| 09/13/2010 |
BW
| Law Office of Jonathan M. Stein, P.L. Investigates Possible Breach of Fiduciary Duty by the Board of ArcSight, Inc. |
| 09/13/2010 |
BW
| Kendall Law Group Investigates ArcSight, Inc. Acquisition for Shareholders |
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