X0303 4 2008-11-25 0 0001391984 Data Domain, Inc. DDUP 0001237289 SANDELL SCOTT D 1119 ST. PAUL STREET BALTIMORE MD 21202 1 0 1 0 Common Stock 2008-11-25 4 J 0 1010512 0 D 8637152 I See Note 2 Common Stock 31977 I See Note 3 New Enterprise Associates 10, Limited Partnership ("NEA 10") made a pro rata distribution for no consideration of an aggregate of 1,010,512 shares of common stock of the issuer to its partners on November 25, 2008. The securities are directly held by NEA 10, a limited partnership. The Reporting Person is a general partner of NEA Partners 10, Limited Partnership ("NEA Partners 10"), the sole general partner of NEA 10. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the NEA shares in which the Reporting Person has no actual pecuniary interest. The securities are directly held by NEA Partners 10, a limited partnership. The Reporting Person is a general partner of NEA Partners 10. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the NEA Partners 10 shares in which the Reporting Person has no actual pecuniary interest. Includes shares transferred from one form of indirect ownership to another form of indirect ownership in transactions exempt under Rule 16a-13. /s/ Shawn Conway, attorney-in-fact 2008-11-26