X0202 4 2004-04-29 0 0001061983 CYTOKINETICS INC CYTK 0001033501 DOW STEPHEN M 13455 NOEL ROAD SUITE 1670 DALLAS, TX 75240 1 0 1 0 Common Stock 2004-04-29 4 C 0 3164003 A 3164003 I See Footnote Series A Preferred Stock 2004-04-29 4 C 0 2244000 D Common Stock 1122000 0 I See Footnote Series B Preferred Stock 2004-04-29 4 C 0 1031377 D Common Stock 515688 0 I See Footnote Series C Preferred Stock 2004-04-29 4 C 0 1052631 D Common Stock 526315 0 I See Footnote Series D Preferred Stock 2004-04-29 4 C 0 2000000 D Common Stock 1000000 0 I See Footnote Each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series E Preferred Stock converted into common stock on a 1-for-2 basis at the closing of the initial public offering. Total common shares of 1,122,000 represents 1,040,094 of such common shares held by Sevin Rosen Fund VI L.P. (SRFVI), and 81,906 of such common shares held by Sevin Rosen VI Affiliates Fund L.P. (SRFVI AFF). Stephen Dow (Dow), is a general partner of the general partner of SRFVI and SRFVI AFF. Dow disclaims beneficial ownership of these shares except to the extent of his proportionate partnership interest in these shares. Total common shares of 515,688 represents 478,043 of such common shares held by SRFVI and 37,645 of such common shares held by SRFVI AFF. Dow is a general partner of the general partner of SRFVI and SRFVI AFF. Dow disclaims beneficial ownership of these shares except to the extent of his proportionate partnership interest in these shares. Total common shares of 526,315 represents 97,579 of such common shares held by SRFVI, 7,684 of such common shares held by SRFVI AFF, 412,631 of such common shares held by Sevin Rosen Fund VIII L.P. (SRFVIII), and 8,421 of such common shares held by Sevin Rosen VIII Affiliates Fund L.P. (SRFVIII AFF). Dow is a general partner of the general partner of SRFVI, SRFVI AFF, SRFVIII and SRFVIII AFF. Dow disclaims beneficial ownership of these shares except to the extent of his proportionate partnership interest in these shares. Total common shares of 1,000,000 represents 625,950 of such common shares held by Sevin Rosen Fund VII L.P. (SRFVII), 24,050 of such common shares held by Sevin Rosen VII Affiliates Fund L.P. (SRFVII AFF), 343,000 of such common shares held by SRFVIII and 7,000 of such common shares held by SRFVIII AFF. Dow is a general partner of the general partner of SRF VII, SRFVII AFF, SRFVIII and SRFVIII AFF. Dow disclaims beneficial ownership of the shares except to the extent of his proportionate partnership interest in these shares. Total common shares of 3,164,003 represents 1,615,716 of such common shares held by SRFVI, 127,235 of such common shares held by SRFVI AFF, 625,950 of such common shares held by SRFVII, 24,050 of such common shares held by SRFVII AFF, 755,631 of such common shares held by SRF VIII and 15,421 of such common shares held by SRFVIII AFF. Dow is a general partner of the general partner of SRFVI, SRFVI AFF, SRFVII, SRFVII AFF, SRFVIII and SRFVIII AFF. Dow disclaims beneficial ownership of these shares except to the extent of his proportionate partnership interest in these shares. John V. Jaggers, By Power Of Attorney 2004-04-29