“Perhaps most important of all, we know that our data is replicated to our contingency site within minutes, minimizing the risk of any disruption in IT functionality at our headquarters in London.” — Colin Everett
Head of IT Strategy and Architecture, Lloyds TSB Corporate Markets

Press Release

Data Domain Announces Pricing of Initial Public Offering

SANTA CLARA, Calif. — June 27, 2007 — Data Domain, today announced that its initial public offering of 7,390,000 shares of common stock has been priced at $15.00 per share. Shares of Data Domain’s common stock will begin trading on June 27, 2007 on the Nasdaq Global Market under the symbol DDUP.

Of the shares being offered, 7,000,000 are being offered by Data Domain, and 390,000 are being offered by a selling stockholder. Data Domain will not receive any of the proceeds from the sale of the shares being sold by the selling stockholder. Net proceeds to the company are expected to be approximately $94.2 million.

The company has granted to the underwriters a 30-day option to purchase up to an additional 1,108,500 shares from Data Domain at the initial public offering price less the underwriting discount. Goldman, Sachs & Co. and Morgan Stanley acted as joint bookrunning managers and Thomas Weisel Partners LLC and Pacific Crest Securities acted as co-managers for the offering.

A registration statement relating to the offering was filed with and declared effective by the Securities and Exchange Commission. The offering of the common stock may be made only by means of a prospectus, copies of which may be obtained from the prospectus department of Goldman, Sachs & Co., Attn: Prospectus Department, 85 Broad Street, New York, New York 10004, via fax at 212-902-9316, or via e-mail at prospectus-ny@ny.email.gs.com; or from the prospectus department of Morgan Stanley & Co. Incorporated, 180 Varick Street, New York, NY 10014, via telephone at 1-866-718-1649, or via email at prospectus@morganstanley.com. 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 or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

Contact Information

Data Domain

Edward Luboja
914-698-1346
press@datadomain.com