X0202 3 2006-10-12 0 0001130258 ACME PACKET INC APKT 0001138942 ADVANCED TECHNOLOGY VENTURES VII LP 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 0001294513 ATV Entrepreneurs VII, L.P. 1000 WINTER STREET SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001317308 ATV Associates VII, L.L.C. 1000 WINTER STREET SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001321048 ATV Alliance 2001, L.P. 1000 WINTER STREET SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001321046 ATV Alliance 2002, L.P. 1000 WINTER STREET SUITE 3700 WALTHAM MA 02451 0 0 1 0 0001317307 ATV Alliance Associates, L.L.C. 1000 WINTER STREET SUITE 3700 WALTHAM MA 02451 0 0 1 0 Series B Convertible Preferred 2003-02-12 Common Stock 4723397 I By Advanced Technology Ventures VII, L.P. Series B Convertible Preferred 2003-02-12 Common Stock 189547 I By Advanced Technology Ventures VII (B), L.P. Series B Convertible Preferred 2003-02-12 Common Stock 91109 I By Advanced Technology Ventures VII (C), L.P. Series B Convertible Preferred 2003-02-12 Common Stock 28148 I By ATV Entrepreneurs VII, L.P. Series B Convertible Preferred 2003-02-12 Common Stock 24525 I By ATV Alliance 2001, L.P. Series B Convertible Preferred 2003-02-12 Common Stock 15216 I By ATV Alliance 2002, L.P. Series C Convertible Preferred 2004-06-08 Common Stock 2003857 I By Advanced Technology Ventures VII, L.P. Series C Convertible Preferred 2004-06-08 Common Stock 80414 I By Advanced Technology Ventures VII (B), L.P. Series C Convertible Preferred 2004-06-08 Common Stock 38652 I By Advanced Technology Ventures VII (C), L.P. Series C Convertible Preferred 2004-06-08 Common Stock 11941 I By ATV Entrepreneurs VII, L.P. Each share is convertible and will automatically convert on a one-for-one basis into the Issuer's common stock upon the closing of the Issuer's initial public offering of common stock pursuant to an effective registration statement filed with the U.S. Securities and Exchange Commission. These shares have no expiration date. These shares are owned by Advanced Technology Ventures VII, L.P. ("ATV VII"), which is under common control with Advanced Technology Ventures VII (B), L.P. ("ATV VII(B)"), Advanced Technology Ventures VII (C), L.P. ("ATV VII(C)"), and ATV Entrepreneurs VII, L.P. ("ATVE VII"). ATV Associates VII, L.L.C. serves as the sole general partner of ATV VII, ATV VII(B), ATV VII(C), and ATVE VII. ATV Associates VII, L.L.C. disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest therein. These shares are owned by ATV VII(B). ATV Associates VII, L.L.C. disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest therein. These shares are owned by ATV VII(C). ATV Associates VII, L.L.C. disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest therein. These shares are owned by ATVE VII. ATV Associates VII, L.L.C. disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest therein. These shares are owned by ATV Alliance 2001, L.P. ("ATVA 2001"), which is under common control with ATV Alliance 2002, L.P. ("ATVA 2002"). ATV Alliance Associates, L.L.C. serves as the sole general partner of ATVA 2001 and ATVA 2002. ATV Alliance Associates, L.L.C. disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest therein. These shares are owned by ATVA 2002. ATV Alliance Associates, L.L.C. disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest therein. ADVANCED TECHNOLOGY VENTURES VII, L.P. By: ATV Associates VII, LLC, its General Partner By /s/ Robert Hower, Managing Director 2006-10-12 ADVANCED TECHNOLOGY VENTURES VII (B), L.P. By: ATV Associates VII, LLC, its General Partner By /s/ Robert Hower, Managing Director 2006-10-12 ADVANCED TECHNOLOGY VENTURES VII (C), L.P. By: ATV Associates VII, LLC, its General Partner By /s/ Robert Hower, Managing Director 2006-10-12 ATV ENTREPRENEURS VII, LP By: ATV Associates VII, LLC, its General Partner By /s/ Robert Hower, Managing Director 2006-10-12 ATV ASSOCIATES VII, L.L.C. By /s/ Robert Hower, Managing Director 2006-10-12 ATV ALLIANCE 2001, L.P. By: ATV Alliance Associates, LLC By /s/ Jean George, Manager 2006-10-12 ATV ALLIANCE 2002, L.P. By: ATV Alliance Associates, LLC By /s/ Jean George, Manager 2006-10-12 ATV ALLIANCE ASSOCIATES L.L.C. By /s/ Jean George, Manager 2006-10-12