Data Domain Restates Financials

SANTA CLARA, Calif. -- Data Domain, Inc. (NasdaqGM:DDUP - News) today announced that in its previously issued financial statements for its fiscal years ended December 31, 2004, 2005 and 2006 and for its fiscal quarters ended March 31, 2006 and 2007 and June 30, 2006 and 2007, it erroneously calculated the weighted average number of shares outstanding for the purpose of determining its net income (loss) per share for each of these periods. The effect of the erroneous calculation was to understate the net loss per share for each of these periods, but in all other respects the Company's financial results and financial condition were not affected by the restatement.

Data Domain intends to file its restated Audited Consolidated Financial Statements for the years ended December 31, 2004, 2005 and 2006 as Exhibit 99.1 to a Current Report on Form 8-K that it intends to file tomorrow, which financial statements may be relied upon by investors.

Data Domain Inc.