X0202 4 2004-10-04 0 0001135271 JAMDAT MOBILE INC JMDT 0001190192 BALKANSKI ALEXANDRE 2480 SAND HILL ROAD SUITE 200 MENLO PARK CA 94025 0 0 1 0 0001190197 BEIRNE DAVID M 2480 SAND HILL ROAD SUITE 200 MENLO PARK CA 94025 0 0 1 0 0001190193 SPURLOCK STEVEN M 2480 SAND HILL ROAD SUITE 200 MENLO PARK CA 94025 0 0 1 0 Common Stock 2004-10-04 4 C 0 2192813 A 2192813 I See Footnote Common Stock 2004-10-04 4 C 0 2163628 A 2163628 I See Footnote Common Stock 2004-10-04 4 C 0 2176600 A 2176600 I See Footnote Series D Preferred Stock 2004-10-04 4 C 0 6578439 D Common Stock 2192813 0 I See Footnote Series D Preferred Stock 2004-10-04 4 C 0 6490884 D Common Stock 2163628 0 I See Footnote Series D Preferred Stock 2004-10-04 4 C 0 6529800 D Common Stock 2176600 0 I See Footnote Not applicable. Alexandre Balkanski, a managing member of Benchmark Capital Management Co. IV, L.L.C. ("BCMC IV"), may be deemed to share voting and dispositive power over the 2,160,386 shares of Common Stock which may be deemed beneficially held by BCMC IV. In addition, Mr. Balkanski may be deemed to share voting and dispositive power over 32,427 shares of Common Stock held by his family trust. Steven M. Spurlock, a managing member of BCMC IV, may be deemed to share voting and dispositive power over the 2,160,386 shares of Common Stock which may be deemed beneficially held by BCMC IV. In addition, Mr. Spurlock may be deemed to share voting and dispositive power over 3,242 shares of Common Stock held by his family trust. David M. Beirne, a managing member of BCMC IV, may be deemed to share voting and dispositive power over the 2,160,386 shares of Common Stock which may be deemed beneficially held by BCMC IV. In addition, Mr. Beirne may be deemed to share voting and dispositive power over 16,214 shares of Common Stock held by his family trust. 1 for 3. Each share of Series D Convertible Preferred Stock automatically converted into 1/3 share of Common Stock immediately prior to the closing of JAMDAT Mobile Inc.'s initial public offering, based on a three-for-one reverse stock split that became effective on September 28, 2004. Immediately. Alexandre Balkanski, David Beirne, Bruce Dunlevie, J. William Gurley, Kevin R. Harvey, Robert Kagle, Andrew Rachleff and Steven M. Spurlock are the managing members of Benchmark Capital Management Co. IV, L.L.C., which serves as general partner to Benchmark Capital Partners IV, L.P., Benchmark Founders' Fund IV, L.P., Benchmark Founders' Fund IV-A, L.P., and Benchmark Founders' Fund IV-B, L.P. Each Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to the extent of such Reporting Person's pecuniary interest in such securities) other than any securities reported herein as being directly owned by such Reporting Person. *This Report is one of two reports, each on a separate Form 4, but relating to the same transaction being filed by the Reporting Persons listed on Exhibit 99.1 /s/ Steven M. Spurlock, by power of attorney for Alexandre Balkanski 2004-10-06 /s/ Steven M. Spurlock, by power of attorney for David M. Beirne 2004-10-06 /s/ Steven M. Spurlock 2004-10-06