X0202 3 2007-03-28 0 0001097136 SENORX INC SENO 0001013425 TREU JESSE I C/O DOMAIN ASSOCIATES, LLC ONE PALMER SQUARE PRINCETON NJ 08542 1 0 1 0 Series B Preferred Stock Common Stock 602228 I By Domain Partners IV, L.P. Series B Preferred Stock Common Stock 14431 I By DP IV Associates, L.P. Series C Preferred Stock Common Stock 742555 I By Domain Partners IV, L.P. Series C Preferred Stock Common Stock 10234 I By DP IV Associates, L.P. The Reporting Person is a Managing Member of One Palmer Square Associates IV, LLC, which is the sole general partner of Domain Partners IV, L.P. and DP IV Associates, L.P. Pursuant to Instruction (5)(b)(iv) of Form 3, 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. All outstanding shares of the Issuer's preferred stock will automatically convert into Common Stock upon the closing of the Issuer's initial public offering, for no additional consideration. Reflects the 1 for 3.5 reverse split of the Common Stock effective prior to the Issuer's initial public offering. /s/Kathleen K. Schoemaker, Attorney-in-Fact 2007-03-28