ArcSight to Speak at Upcoming Investor Conferences.

CUPERTINO, Calif. -- ArcSight, Inc. (NASDAQ: ARST), a leading global provider of security and compliance management solutions that protect enterprises and government agencies, today announced it will be presenting at the following investor conferences in September:

* Deutsche Bank 2009 Technology Conference on Wednesday, September 16, 2009 at 10:55 a.m. Pacific Time in San Francisco, CA

* ThinkEquity 6th Annual Growth Conference on Thursday, September 17, 2009 at 8:30 a.m. Pacific Time in San Francisco, CA

A live webcast of each presentation will be available on the Investor Relations section of the company's website at www.arcsight.com. In addition, an archived webcast of each presentation will also be available on the Investor Relations section of the company's website.

About ArcSight

ArcSight (NASDAQ: ARST) is a leading global provider of security and compliance management solutions that intelligently identify and mitigate cyber threat and risk for businesses and government agencies. ArcSight helps protect businesses and government agencies by providing enhanced visibility and critical insights into their IT infrastructure across all users, networks, datacenters and applications. With the ArcSight market-leading SIEM platform, organizations can proactively safeguard their digital assets, comply with corporate and regulatory policy and control the risks associated with cybertheft, cyber fraud, cyberwarfare and cyber espionage. For more information, visit www.arcsight.com. (ARST-IR)

[c] 2009 ArcSight, Inc. All rights reserved. ArcSight and the ArcSight logo are trademarks of ArcSight, Inc.