X0202 3 2007-01-31 0 0001212235 XTENT INC XTNT 0001317308 ATV Associates VII, L.L.C. 1000 WINTER STREET, SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001138942 ADVANCED TECHNOLOGY VENTURES VII LP 1000 WINTER STREET, SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001294513 ATV Entrepreneurs VII, L.P. 1000 WINTER STREET, SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001294525 Advanced Technology Ventures VII(B), L.P. 1000 WINTER STREET, SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001294527 Advanced Technology Ventures VII(C), L.P. 1000 WINTER STREET, SUITE 3700 WALTHAM MA 02451 0 0 1 0 Series B Convertible Preferred Stock 0 Common Stock 6036 I By ATV Entrepreneurs VII, L.P. Series C Convertible Preferred Stock 0 Common Stock 5529 I By ATV Entrepreneurs VII, L.P. Series D Convertible Preferred Stock 0 Common Stock 2794 I By ATV Entrepreneurs VII, L.P. Series B Convertible Preferred Stock 0 Common Stock 40644 I By Advanced Technology Ventures VII (B), L.P. Series C Convertible Preferred Stock 0 Common Stock 37229 I By Advanced Technology Ventures VII (B), L.P. Series D Convertible Preferred Stock 0 Common Stock 18821 I By Advanced Technology Ventures VII (B), L.P. Series B Convertible Preferred Stock 0 Common Stock 19536 I By Advanced Technology Ventures VII (C), L.P. Series C Convertible Preferred Stock 0 Common Stock 17895 I By Advanced Technology Ventures VII (C), L.P. Series D Convertible Preferred Stock 0 Common Stock 9046 I By Advanced Technology Ventures VII (C), L.P. Series B Convertible Preferred Stock 0 Common Stock 1012820 I By Advanced Technology Ventures VII, L.P. Series C Convertible Preferred Stock 0 Common Stock 927748 I By Advanced Technology Ventures VII, L.P. Series D Convertible Preferred Stock 0 Common Stock 469021 I By Advanced Technology Ventures VII, L.P. The reported securities are convertible at any time at the option of ATV Entrepreneurs VII, L.P., but automatically convert into shares of Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering, estimated to be on or about February 6, 2007. The reported securities are convertible at any time at the option of Advanced Technology Ventures VII (B), L.P., but automatically convert into shares of Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering, estimated to be on or about February 6, 2007. The reported securities are convertible at any time at the option of Advanced Technology Ventures VII (C), L.P., but automatically convert into shares of Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering, estimated to be on or about February 6, 2007. The reported securities are convertible at any time at the option of Advanced Technology Ventures VII, L.P., but automatically convert into shares of Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering, estimated to be on or about February 6, 2007. Not applicable. The reported securities are owned directly by ATV Entrepreneurs VII, L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of ATV Entrepreneurs VII, L.P. ATV Associates VII, L.L.C. disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein. Advanced Technology Ventures VII, L.P. disclaims beneficial ownership of these securities. The reported securities are owned directly by Advanced Technology Ventures VII (B), L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of Advanced Technology Ventures VII (B), L.P. ATV Associates VII, L.L.C. disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein. Advanced Technology Ventures VII, L.P. disclaims beneficial ownership of these securities. The reported securities are owned directly by Advanced Technology Ventures VII (C), L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of Advanced Technology Ventures VII (C), L.P. ATV Associates VII, L.L.C. disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein. Advanced Technology Ventures VII, L.P. disclaims beneficial ownership of these securities. The reported securities are owned directly by Advanced Technology Ventures VII, L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of Advanced Technology Ventures VII, L.P. ATV Associates VII, L.L.C. disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein. The Date of Event is based upon the date of effectiveness of the Issuer's Registration Statement on Form S-1 filed in connection with the Issuer's initial public offering, estimated to be on or about January 31, 2007. See Exhibit 99 - Joint Filer Information. /s/ Michael A. Carusi, Managing Director 2007-01-31