X0202 4 2007-04-03 1 0001097136 SENORX INC SENO 0001024000 BLAIR JAMES C C/O DOMAIN ASSOCIATES, LLC ONE PALMER SQUARE PRINCETON NJ 08542 0 0 1 0 Common Stock 2007-04-03 4 C 0 1344783 A 1344783 I By Domain Partners IV, L.P. Common Stock 2007-04-03 4 C 0 24665 A 24665 I By DP IV Associates, L.P. Series B Preferred Stock 2007-04-03 4 C 0 1846434 D Common Stock 602228 0 I By Domain Partners IV, L.P. Series B Preferred Stock 2007-04-03 4 C 0 44246 D Common Stock 14431 0 I By DP IV Associates, L.P. Series C Preferred Stock 2007-04-03 4 C 0 2598948 D Common Stock 742555 0 I By Domain Partners IV, L.P. Series C Preferred Stock 2007-04-03 4 C 0 35820 D Common Stock 10234 0 I By DP IV Associates, L.P. All outstanding shares of the Issuer's preferred stock were automatically converted into Common Stock upon the closing of the Issuer's initial public offering, for no additional consideration. The Reporting Person is a managing member of One Palmer Square Associates IV, L.L.C., which is the sole general partner of Domain Partners IV, L.P. and DP IV Associates, L.P. Pursuant to Instruction 4(b)(iv) of Form 4, the Reporting Person has elected to report as indirectly beneficially owned the entire number of securities beneficially owned by each such entity. The Reporting Person disclaims beneficial ownership of any securities, and any proceeds thereof, that exceed his or her pecuniary interest therein and/or that are not actually distributed to him or her. /s/Kathleen K. Schoemaker, Attorney-in-Fact 2007-04-03