Release Details

OCEANPORT, N.J. -- March 17, 2006 -- CommVault Systems, Inc., a leading provider of data management software applications and related services, announced today that it has filed a registration statement for the proposed initial public offering of its common stock with the Securities and Exchange Commission. The shares of common stock to be sold in the offering are expected to be offered by CommVault Systems, Inc. and certain of its stockholders.

Credit Suisse Securities (USA) LLC and Goldman, Sachs & Co. will be acting as joint book-running managers of the proposed offering. Merrill Lynch & Co., Thomas Weisel Partners LLC, RBC Capital Markets and C.E. Unterberg, Towbin LLC are also acting as underwriters for the proposed offering.

A registration statement relating to these securities has been filed with the Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy these securities be accepted before the time the registration statement becomes effective.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

Copies of the CommVault Systems, Inc. prospectus, when available, may be obtained from: Credit Suisse Securities (USA) LLC, Eleven Madison Avenue, New York, New York, 10010, telephone 212-325-2580 or Goldman, Sachs & Co., 85 Broad Street, New York, New York 10004, telephone 866-471-2526.

About CommVault
CommVault® provides Unified Data Management™ solutions for high- performance data protection, universal availability and simplified management of data on complex storage networks. The CommVault® QiNetix™ platform, based on CommVault's Common Technology Engine, integrates Galaxy backup and recovery, snapshot management and recovery, remote replication, active data migration and archiving, e-mail compliance, enterprise service level management and reporting and storage resource management software solutions. The QiNetix unified approach allows customers to add/integrate QiNetix components, at a fraction of the time, effort and money required by separate point products.

Information about CommVault can be obtained by calling (732) 870-4000. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States.

©2005 CommVault Systems, Inc. CommVault Systems, CommVault Galaxy, CommVault QiNetix, DataMigrator, DataArchiver, QNet, CommServe StorageManager, MediaAgent, iDataAgent, CommCell and the CommVault logo are trademarks and may be registered trademarks in some jurisdictions of CommVault Systems, Inc. Product and company names herein may be trademarks of their respective owners.