X0303 4 2009-07-10 0 0001391984 Data Domain, Inc. DDUP 0001237289 SANDELL SCOTT D 1119 ST. PAUL STREET BALTIMORE MD 21202 1 0 1 0 Common Stock 2009-07-10 4 J 0 7741629 0 D 895523 I See Note 2 Common Stock 109393 I See Note 3 New Enterprise Associates 10, Limited Partnership ("NEA 10") made a pro rata distribution for no consideration of an aggregate of 7,741,629 shares of common stock of the issuer to its partners on July 10, 2009. As a result of such distribution, NEA 10 now no longer owns 10% or more of the outstanding common stock of the issuer and, accordingly, is no longer subject to reporting requirements or other obligations under Section 16 of the Securities Exchange Act of 1934, as amended (the "1934 Act"), with respect to ownership of common stock of the issuer. The securities are directly held by NEA 10. 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 1934 Act or otherwise of such portion of the NEA 10 shares in which the Reporting Person has no actual pecuniary interest therein. The securities are directly held by NEA Partners 10. 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 1934 Act or otherwise of such portion of the NEA Partners 10 shares in which the Reporting Person has no actual pecuniary interest therein. Includes shares transferred from one form of indirect ownership to another form of indirect ownership in transactions exempt under Rule 16a-13. /s/ Louis Citron, attorney-in-fact 2009-07-10