CommVault Files a Registration Statement

May 25, 2007

OCEANPORT, N.J., May 25, 2007 (BUSINESS WIRE) -- CommVault(R) (NASDAQ:CVLT) today announced that it filed a registration statement with the Securities and Exchange Commission for a proposed public offering of 7,500,000 shares of its common stock. CommVault plans to offer 300,000 shares of its common stock and the selling stockholders named in the registration statement plan to offer 7,200,000 shares of its common stock. In addition, the selling stockholders will grant the underwriters of the offering an option to purchase up to 1,125,000 additional shares of our common stock to cover over-allotments of shares.

Credit Suisse Securities (USA) LLC, Goldman, Sachs & Co. and Merrill Lynch, Pierce, Fenner & Smith Incorporated will act as joint book-running managers for the offering, with Thomas Weisel Partners LLC, RBC Capital Markets Corporation and C.E. Unterberg, Towbin, LLC acting as co-managers.

CommVault expects that the offering will be completed in the first fiscal quarter of 2008. CommVault will not receive any proceeds from the sale of shares by the selling stockholders.

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 be accepted prior to the time the registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any State in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such State.

When available, copies of the written preliminary prospectus relating to the offering can be obtained by contacting the prospectus departments at Credit Suisse Securities (USA) LLC, One Madison Avenue, New York, NY 10010, (800) 221-1037, Goldman, Sachs & Co., 85 Broad Street, New York, NY 10004, (212) 902-1171 or Merrill Lynch, Pierce, Fenner & Smith Incorporated, 4 World Financial Center, New York, NY 10080, (212) 449-1000.

About CommVault(R)

A singular vision - a belief in a better way to address current and future data management needs - guides CommVault in the development of Unified Data Management(R) solutions for high-performance data protection, universal availability and simplified management of data on complex storage networks. CommVault's exclusive single-platform architecture gives companies unprecedented control over data growth, costs and risk. CommVault's software was designed to work together seamlessly from the ground up, sharing a single code and common function set, to deliver superlative Data Protection, Archive, Replication, and Resource Management. More companies every day join those who have discovered the unparalleled efficiency, performance, reliability, and control only CommVault can offer. Information about CommVault is available at www.commvault.com. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States. (cvlt-co)

Safe Harbor Statement

This press release may contain forward-looking statements, including statements regarding financial projections, which are subject to risks and uncertainties, such as competitive factors, difficulties and delays inherent in the development, manufacturing, marketing and sale of software products and related services, general economic conditions and others. Statements regarding CommVault's beliefs, plans, expectations or intentions regarding the future are forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. All such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from anticipated results. CommVault does not undertake to update its forward-looking statements.

(C)2007 CommVault Systems, Inc. All rights reserved. CommVault, CommVault and logo, the "CV" logo, CommVault Systems, Solving Forward, SIM, Singular Information Management, CommVault Galaxy, Unified Data Management, QiNetix, Quick Recovery, QR, QNet, GridStor, Vault Tracker, Quick Snap, QSnap, Recovery Director, CommServe, and CommCell, are trademarks or registered trademarks of CommVault Systems, Inc. All other third party brands, products, service names, trademarks, or registered service marks are the property of and used to identify the products or services of their respective owners. All specifications are subject to change without notice.

SOURCE: CommVault

CommVault
Media
Dani Kenison, 732-728-5370
pr@commvault.com
Investor Relations
Michael Picariello, 732-728-5380
ir@commvault.com