SC 13G/A 1 p16615_sc13ga.txt AMENDMENT NO. 1 TO SCHEDULE 13G -------------------------- OMB APPROVAL -------------------------- OMB Number: 3235-0145 Expires: December 31, 2005 Estimated average burden hours per response......11 -------------------------- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 ------------ SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b) (Amendment No. 1 )* CORIXA CORPORATION -------------------------------------------------------------------------------- (Name of Issuer) Common Stock -------------------------------------------------------------------------------- (Title of Class of Securities) 21887F 10 0 -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2002 -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |_| Rule 13d-1(b) |_| Rule 13d-1(c) |X| Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). Page 1 of 27 pages CUSIP No. 21887F 10 0 Page 2 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS InterWest Partners V, LP I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 501,500 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 501,500 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 501,500 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.0% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 21887F 10 0 Page 3 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS InterWest Investors V I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 3,154 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 3,154 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,154 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Less than 1% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 21887F 10 0 Page 4 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS InterWest Partners VIII, LP I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 2,752,389 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 2,752,389 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,752,389 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.6% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 21887F 10 0 Page 5 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS InterWest Investors VIII, LP I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 21,969 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 21,969 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 21,969 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Less than 1% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 21887F 10 0 Page 6 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS InterWest Investors Q VIII, LP I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 78,746 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 78,746 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 78,746 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Less than 1% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 21887F 10 0 Page 7 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS InterWest Management Partners V, LP (the general partner of InterWest Partners V, LP) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 501,500 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 501,500 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 501,500 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.0% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 21887F 10 0 Page 8 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS InterWest Management Partners VIII, LLC (the general partner of InterWest Partners VIII, LP, InterWest Investors VIII, LP, and InterWest Investors Q VIII, LP) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 2,853,104 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 2,853,104 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,853,104 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* OO -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! CUSIP No. 21887F 10 0 Page 9 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS John C. Adler (a venture member of InterWest Management Partners VIII, LLC) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 2,853,104 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 2,853,104 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,853,104 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by John C. Adler that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 10 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Stephen C. Bowsher (a managing director of InterWest Management Partners VIII, LLC) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 2,853,104 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 2,853,104 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,853,104 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Stephen C. Bowsher that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 11 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Harvey B. Cash (a managing director of InterWest Management Partners VIII, LLC) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 5,015 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 2,853,104 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 5,015 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 2,853,104 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,858,119 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Harvey B. Cash that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 12 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Alan W. Crites (a general partner of InterWest Management Partners V, LP and InterWest Investors V) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 62,149 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 504,654 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 62,149 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 566,803 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.2% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Alan W. Crites that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 13 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Philip T. Gianos (a managing director of InterWest Management Partners VIII, LLC and a general partner of InterWest Management Partners V, LP) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 56,640 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 3,354,604 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 56,640 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 3,354,604 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,411,244 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.9% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Philip T. Gianos that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 14 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Wallace R. Hawley (a general partner of InterWest Management Partners V, LP and InterWest Investors V) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 504,654 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 504,654 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.0% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Wallace R. Hawley that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 15 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS W. Scott Hedrick (a managing director of InterWest Management Partners VIII, LLC and a general partner of InterWest Management Partners V, LP and InterWest Investors V) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 82,412 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 3,357,758 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 82,412 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 3,357,758 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,440,170 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 7.0% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by W. Scott Hedrick that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 16 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS W. Stephen Holmes III (a managing director of InterWest Management Partners VIII, LLC and a general partner of InterWest Management Partners V, LP and InterWest Investors V) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 37,803 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 3,357,758 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 37,803 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 3,357,758 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,395,561 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.9% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by W. Stephen Holmes III that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 17 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Gilbert H. Kliman (a managing director of InterWest Management Partners VIII, LLC) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 500 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 2,853,104 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 500 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 2,853,104 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,853,604 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Gilbert H. Kliman that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 18 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Robert R. Momsen (a general partner of InterWest Management Partners V, LP and InterWest Investors V) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 117,900 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 504,654 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 117,900 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 622,554 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 1.3% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Robert R. Momsen that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 19 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS H. Ronald Nash (a venture member of InterWest Management Partners VIII, LLC) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 2,853,104 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 2,853,104 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,853,104 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by H. Ronald Nash that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 20 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Arnold L. Oronsky (a managing director of InterWest Management Partners VIII, LLC and a general partner of InterWest Management Partners V, LP) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 108,242 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 3,354,604 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 108,242 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 3,354,604 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,462,846 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 7.0% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Arnold L. Oronsky that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 21 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Thomas L. Rosch (a managing director of InterWest Management Partners VIII, LLC) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 2,853,104 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 2,853,104 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,853,104 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Thomas L. Rosch that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. CUSIP No. 21887F 10 0 Page 22 of 27 Pages -------------------------------------------------------------------------------- 1 NAMES OF REPORTING PERSONS Michael B. Sweeney (a venture member of InterWest Management Partners VIII, LLC) I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 1,504 -------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 2,853,104 OWNED BY -------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 1,504 WITH -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 2,853,104 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,854,608 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.8% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT! Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Michael B. Sweeney that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose, and such beneficial ownership is expressly disclaimed, except to the extent of his pecuniary interest. ITEM 1. (a) NAME OF ISSUER : Corixa Corporation (b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICE: 1124 Columbia Street, Suite 200, Seattle, WA 98104 ITEM 2. (a) NAME OF PERSON(S) FILING: InterWest Partners V, LP ("IWP V") InterWest Investors V ("II V") InterWest Management Partners V, LP ("IMP V") InterWest Partners VIII, LP ("IWP VIII") InterWest Investors VIII, LP ("II VIII") InterWest Investors Q VIII, LP ("IIQ VIII") InterWest Management Partners VIII, LLC ("IMP VIII") John C. Adler ("Adler") Stephen C. Bowsher ("Bowsher") Harvey B. Cash ("Cash") Alan W. Crites ("Crites") Philip T. Gianos ("Gianos") Wallace R. Hawley ("Hawley") W. Scott Hedrick ("Hedrick") W. Stephen Holmes III ("Holmes") Gilbert H. Kliman ("Kliman") Robert R. Momsen ("Momsen") H. Ronald Nash ("Nash") Arnold L. Oronsky ("Oronsky") Thomas L. Rosch ("Rosch") Michael B. Sweeney ("Sweeney") (b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: 2710 Sand Hill Road, Second Floor, Menlo Park, CA 94025 (c) CITIZENSHIP/PLACE OF ORGANIZATION: IWP V: California II V: California IMP V: California IWP VIII: California II VIII: California IIQ VIII: California IMP VIII California Adler: United States Bowsher: United States Cash: United States Crites: United States Gianos: United States Hawley: United States Hedrick: United States Holmes: United States Kliman: United States Momsen: United States Nash: United States Oronsky: United States Rosch: United States Sweeney: United States Page 23 of 27 Pages (d) TITLE OF CLASS OF SECURITIES: Common Stock (e) CUSIP NUMBER: 21887F 10 0 ITEM 3. NOT APPLICABLE. ITEM 4. OWNERSHIP.

* less than 1% ** Includes 36,726 and 45,848 shares issuable to Momsen and Oronsky, respectively, pursuant to outstanding options exercisable within 60 days of December 31, 2002. Page 24 of 27 Pages (1) Includes 399,920 shares issuable pursuant to warrant exercise. (2) Includes 3,192 shares issuable pursuant to warrant exercise. (3) Includes 11,442 shares issuable pursuant to warrant exercise. (4) IMP V is the general partner of IWP V. (5) Includes 414,554 shares issuable pursuant to warrant exercise. IMP VIII is the general partner of IWP VIII, II VIII and IIQ VIII. Bowsher, Cash, Gianos, Hedrick, Holmes, Kliman, Oronsky and Rosch are managing directors of IMP VIII. Adler, Nash and Sweeney are venture members of IMP VIII. (6) Crites, Gianos, Hawley, Hedrick, Holmes, Momsen and Oronsky are general partners of IMP V. (7) Crites, Hawley, Hedrick, Holmes and Momsen are the administrative general partners of IIV. ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS. Not applicable. ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON. Under certain circumstances set forth in the partnership agreements of IMP V and II V and the limited liability company operating agreement of IMP VIII, the general partners and/or limited partners of such partnerships and the members of such limited liability company have the right to receive dividends from, or the proceeds from the sale of, the common stock of issuer beneficially owned by such partnerships and limited liability company. ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY. Not applicable. ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP. No reporting person is a member of a group as defined in section 240.13d-1(b)(1)(iii)(H) of the Act. ITEM 9. NOTICE OF DISSOLUTION OF THE GROUP. Not applicable. ITEM 10. CERTIFICATION. Not Applicable. EXHIBITS Joint Filing Statement attached as Exhibit A. Page 25 of 27 Pages SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: February ___, 2003 By: /s/ John C. Adler INTERWEST PARTNERS V, LP ------------------------- Name: John C. Adler By: InterWest Management Partners V, LP its General Partner By: /s/ Stephen C. Bowsher ------------------------- By: /s/ W. Stephen Holmes Name: Stephen C. Bowsher -------------------------------- General Partner By: /s/ Harvey B. Cash ------------------------- INTERWEST INVESTORS V Name: Harvey B. Cash By: /s/ W. Stephen Holmes By: /s/Alan W. Crites ---------------------------------------- ------------------------- General Partner Name: Alan W. Crites INTERWEST MANAGEMENT PARTNERS V, LP By: /s/ Philip T. Gianos ------------------------- By: /s/ W. Stephen Holmes Name: Philip T. Gianos ---------------------------------------- General Partner By: /s/ Wallace R. Hawley ------------------------- INTERWEST PARTNERS VIII, LP Name: Wallace R. Hawley By: InterWest Management Partners VIII, LLC By: /s/ W. Scott Hedrick its General Partner ------------------------- Name: W. Scott Hedrick By: /s/ W. Stephen Holmes --------------------------------- By: /s/ W. Stephen Holmes Managing Director ------------------------- Name: W. Stephen Holmes INTERWEST INVESTORS VIII, LP By: /s/ Gilbert H. Kliman By: InterWest Management Partners VIII, LLC ------------------------- its General Partner Name: Gilbert H. Kliman By: /s/ W. Stephen Holmes By: /s/ Robert R. Momsen --------------------------------- ------------------------- Managing Director Name: Robert R. Momsen INTERWEST INVESTORS Q VIII, LP By: /s/ H. Ronald Nash ------------------------- By: InterWest Management Partners VIII, LLC Name: H. Ronald Nash its General Partner By: /s/ Arnold L. Oronsky By: /s/ W. Stephen Holmes ------------------------- --------------------------------- Name: Arnold L. Oronsky Managing Director By: /s/ Thomas L. Rosch INTERWEST MANAGEMENT PARTNERS VIII, LLC ------------------------- Name: Thomas L. Rosch By: /s/ W. Stephen Holmes ---------------------------------------- By: /s/ Michael B. Sweeney Managing Director ------------------------- Name: Michael B. Sweeney Page 26 of 27 Pages EXHIBIT A Joint Filing Statement We, the undersigned, hereby express our agreement that the attached Schedule 13G is filed on behalf of each of us. Date: February ___, 2003 By: /s/ John C. Adler INTERWEST PARTNERS V, LP ------------------------- Name: John C. Adler By: InterWest Management Partners V, LP its General Partner By: /s/ Stephen C. Bowsher ------------------------- By: /s/ W. Stephen Holmes Name: Stephen C. Bowsher --------------------------------- General Partner By: /s/ Harvey B. Cash ------------------------- INTERWEST INVESTORS V Name: Harvey B. Cash By: /s/ W. Stephen Holmes By: /s/Alan W. Crites ---------------------------------------- ------------------------- General Partner Name: Alan W. Crites INTERWEST MANAGEMENT PARTNERS V, LP By: /s/ Philip T. Gianos ------------------------- By: /s/ W. Stephen Holmes Name: Philip T. Gianos ---------------------------------------- General Partner By: /s/ Wallace R. Hawley ------------------------- INTERWEST PARTNERS VIII, LP Name: Wallace R. Hawley By: InterWest Management Partners VIII, LLC By: /s/ W. Scott Hedrick its General Partner ------------------------- Name: W. Scott Hedrick By: /s/ W. Stephen Holmes -------------------------------- By: /s/ W. Stephen Holmes Managing Director ------------------------- Name: W. Stephen Holmes INTERWEST INVESTORS VIII, LP By: /s/ Gilbert H. Kliman By: InterWest Management Partners VIII, LLC ------------------------- its General Partner Name: Gilbert H. Kliman By: /s/ W. Stephen Holmes By: /s/ Robert R. Momsen --------------------------------- ------------------------- Managing Director Name: Robert R. Momsen INTERWEST INVESTORS Q VIII, LP By: /s/ H. Ronald Nash ------------------------- By: InterWest Management Partners VIII, LLC Name: H. Ronald Nash its General Partner By: /s/ Arnold L. Oronsky By: /s/ W. Stephen Holmes ------------------------- --------------------------------- Name: Arnold L. Oronsky Managing Director By: /s/ Thomas L. Rosch INTERWEST MANAGEMENT PARTNERS VIII, LLC ------------------------- Name: Thomas L. Rosch By: /s/ W. Stephen Holmes ---------------------------------------- By: /s/ Michael B. Sweeney Managing Director ------------------------- Name: Michael B. Sweeney Page 27 of 27 Pages

INTERWEST PARTNERS VIII LP SC 13G/A