ArcSight, Inc. (ARST) President and Chief Executive Officer to Ring the NASDAQ Stock Market Opening Bell

 What:
 ArcSight, Inc. (ARST), a leading global provider of security and
 compliance management solutions that protect enterprises and
 government agencies, will visit the NASDAQ MarketSite in New York
 City's Times Square.

 In honor of the occasion, Tom Reilly, President and Chief
 Executive Officer of ArcSight, Inc. (ARST), will preside over the
 NASDAQ Opening Bell.

 Where:
 NASDAQ MarketSite - 4 Times Square - 43rd & Broadway - Broadcast Studio

 When:
 Tuesday, October 13th, 2009 at 9:15 - 9:30 a.m. ET

 Contacts:
 Robert Dougherty
 (415) 293-4427
 robert.dougherty@fd.com

 NASDAQ MarketSite:
 Robert Madden
 (646) 441-5045
 Robert.Madden@NASDAQOMX.com

Feed Information:

The Opening Bell is available from 9:20 a.m. to 9:35 a.m. on Galaxy 19 C/15, downlink frequency 4000 vertical. The feed can also be found on Ascent fiber 1623. If you have any questions, please contact Robert Madden at (646) 441-5045.

Radio Feed:

An audio transmission of the Opening Bell is also available from 9:20 a.m. to 9:35 a.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can be found on Ascent fiber 1623 as well.

Facebook and Twitter:

For multimedia features such as exclusive content, photo postings, status updates and video of bell ceremonies please visit our Facebook page at: http://www.facebook.com/pages/NASDAQ-OMX/108167527653

For news tweets, please visit our Twitter page at: http://twitter.com/nasdaqomx

Webcast:

A live webcast of the NASDAQ Opening Bell will be available at: http://www.nasdaq.com/reference/marketsite_about.stm.

Photos:

To obtain a hi-resolution photograph of the Market Open, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market open of your choice.

About ArcSight, Inc. (ARST):

ArcSight (Nasdaq:ARST) is a leading global provider of security and compliance management solutions that protect businesses and government agencies. ArcSight identifies, assesses and mitigates both internal and external cyber threats and risks across the organization for activities associated with critical assets and processes. With the market-leading ArcSight SIEM platform, organizations can proactively safeguard their assets, comply with corporate and regulatory policy and control the risks associated with cyber-theft, cyber-fraud, cyber-warfare and cyber-espionage. For more information, visit www.arcsight.com.

About NASDAQ OMX:

The NASDAQ OMX Group, Inc. is the world's largest exchange company. It delivers trading, exchange technology and public company services across six continents, with over 3,700 listed companies. NASDAQ OMX offers multiple capital raising solutions to companies around the globe, including its U.S. listings market, NASDAQ OMX Nordic, NASDAQ OMX Baltic, NASDAQ OMX First North, and the U.S. 144A sector. The company offers trading across multiple asset classes including equities, derivatives, debt, commodities, structured products and exchange-traded funds. NASDAQ OMX technology supports the operations of over 70 exchanges, clearing organizations and central securities depositories in more than 50 countries. NASDAQ OMX Nordic and NASDAQ OMX Baltic are not legal entities but describe the common offering from NASDAQ OMX exchanges in Helsinki, Copenhagen, Stockholm, Iceland, Tallinn, Riga, and Vilnius. For more information about NASDAQ OMX, visit http://www.nasdaqomx.com. *Please follow NASDAQ OMX on Facebook (http://www.facebook.com/pages/NASDAQ-OMX/108167527653) and Twitter (http://www.twitter.com/nasdaqomx).

This news release was distributed by GlobeNewswire, www.globenewswire.com

SOURCE: The NASDAQ OMX Group, Inc.

NDAQA

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