-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, SUvjOFD8fZZ75Da7otmE26PLrqh4ltyVhanxqu7HLQTRxaHIe9gprl5izRkpAPNW 90FVc8xSgkSq/FyHKKElHw== 0001116502-04-000263.txt : 20040217 0001116502-04-000263.hdr.sgml : 20040216 20040217121651 ACCESSION NUMBER: 0001116502-04-000263 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20040217 GROUP MEMBERS: AUGUSTINE LAWLOR GROUP MEMBERS: CHRISTOPHER MIRABELLI, PH.D. GROUP MEMBERS: HAROLD R. WERNER GROUP MEMBERS: HEALTHCARE PARTNERS V, L.P. GROUP MEMBERS: HEALTHCARE VENTURES V, L.P. GROUP MEMBERS: JAMES H. CAVANAUGH, PH.D. GROUP MEMBERS: JOHN W. LITTLECHILD GROUP MEMBERS: WILLIAM CROUSE SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: DYAX CORP CENTRAL INDEX KEY: 0000907562 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731] IRS NUMBER: 043053198 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-60267 FILM NUMBER: 04605697 BUSINESS ADDRESS: STREET 1: ONE KENDALL SQ BLDG 600 5TH FL CITY: CAMBRIDGE STATE: MA ZIP: 02139 MAIL ADDRESS: STREET 1: ONE KENDALL SQ BLDG 600 STREET 2: 5TH FL CITY: CAMBRIDGE STATE: MA ZIP: 02139 FORMER COMPANY: FORMER CONFORMED NAME: BIOTAGE INC DATE OF NAME CHANGE: 19951117 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: HEALTHCARE VENTURES V L P CENTRAL INDEX KEY: 0001022423 IRS NUMBER: 223487780 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 44 NASSAU ST CITY: PRINCETON STATE: NJ ZIP: 08542 BUSINESS PHONE: 9089064600 MAIL ADDRESS: STREET 1: 44 NASSAU ST CITY: PRINCETON STATE: NJ ZIP: 08542 SC 13G/A 1 dyax-sc13ga.txt AMENDED SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 --------------------------------- OMB APPROVAL --------------------------------- OMB Number: 3235-0145 Expires: December 31, 2005 Estimated average burden hours per response.............11 SCHEDULE 13G Under the Securities and Exchange Act of 1934 (Amendment No. 2)* DYAX CORP. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $.01 par value - -------------------------------------------------------------------------------- (Title of Class of Securities) 26746E103 - -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2003 - -------------------------------------------------------------------------------- (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 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). CUSIP No. 26746E103 13G Page 2 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) HealthCare Ventures V, L.P. - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,651,376 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.70% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 3 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) HealthCare Partners V, L.P. - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,651,376 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.70% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* PN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 4 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) James H. Cavanaugh, Ph.D. - -------------------------------------------------------------------------------- 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 - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,651,376 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.70% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 5 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Harold R. Werner - -------------------------------------------------------------------------------- 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 - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,651,376 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.7% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 6 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) William Crouse - -------------------------------------------------------------------------------- 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 - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,651,376 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.7% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 7 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) John W. Littlechild - -------------------------------------------------------------------------------- 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 - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 22,625 ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 22,625 ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,674,001 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.8% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 8 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Christopher Mirabelli, Ph.D. - -------------------------------------------------------------------------------- 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 - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,651,376 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.70% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 9 of 12 Pages - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Augustine Lawlor - -------------------------------------------------------------------------------- 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 - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY 1,651,376 ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH 1,651,376 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,651,376 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [-] - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.70% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* IN - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 26746E103 13G Page 10 of 12 Pages Item 1(a). Name of Issuer: Dyax Corp. -------------------------------------------------------------------- Item 1(b). Address of Issuer's Principal Executive Offices: One Kendall Square Cambridge, Massachusetts 02339 -------------------------------------------------------------------- Item 2(a). Name of Person Filing: HealthCare Ventures V, L.P. ("HCV V"), HealthCare Partners V, L.P. ("HCP V"), Drs. Cavanaugh and Mirabelli and Messrs. Werner, Littlechild, Crouse and Lawlor. See attached Exhibit A, which is a copy of their agreement in writing to file this statement on behalf of each of them(1). -------------------------------------------------------------------- Item 2(b). Address of Principal Business Office, or if None, Residence: The business address for HCV V, HCP V, Dr. Cavanaugh and Messrs. Werner and Crouse is 44 Nassau Street, Princeton, New Jersey 08542. The business address for Dr. Mirabelli and Messrs. Littlechild and Lawlor is One Kendall Square, Building 300, Cambridge, Massachusetts 02339. -------------------------------------------------------------------- Item 2(c). Citizenship: HCV V, and HCP V are limited partnerships organized under the laws of the State of Delaware. Drs. Cavanaugh and Mirabelli and Messrs. Werner, Littlechild, Crouse and Lawlor are each United States citizens. -------------------------------------------------------------------- Item 2(d). Title of Class of Securities: Common Stock par value $.01 (the "Shares") -------------------------------------------------------------------- Item 2(e). CUSIP Number: 26746E103 -------------------------------------------------------------------- Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a: Not Applicable (a) [_] Broker or dealer registered under Section 15 of the Exchange Act. (b) [_] Bank as defined in Section 3(a)(6) of the Exchange Act. (c) [_] Insurance company as defined in Section 3(a)(19) of the Exchange Act. (d) [_] Investment company registered under Section 8 of the Investment Company Act. (e) [_] An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); (f) [_] An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F); (g) [_] A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G); (h) [_] A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; (i) [_] A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act; (j) [_] Group, in accordance with Rule 13d-1(b)(1)(ii)(J). - -------- 1 Drs. Cavanaugh and Mirabelli and Messrs. Werner, Littlechild, Crouse and Lawlor are general partners of HCP V, the general partner of HCV V, the record holder of the Issuer's Common Stock reported hereto. CUSIP No. 26746E103 13G Page 11 of 12 Pages Item 4. Ownership. Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (a) Amount beneficially owned: As of December 31, 2003: HCV V, HCP V Drs. Cavanaugh and Mirabelli and Messrs Werner, Crouse and Lawlor each beneficially owned 1,651,376 Shares of the Issuer's Common Stock; Mr. Littlechild beneficially owned 1,674,001 Shares consisting of 1,651,376 Shares of the Issuer's Common Stock and options to purchase 22,625 Shares of the Issuer's Common Stock2. ---------------------------------------------------------------------- (b) Percent of class: As of December 31, 2003: the 1,651,376 Shares beneficially owned by HCV V and HCP V, Drs. Cavanaugh and Mirabelli and Messrs. Werner, Crouse and Lawlor constituted 6.70% of the Shares outstanding; the 1,674,001 Shares beneficially owned by Mr. Littlechild constituted 6.80% of the Shares outstanding. ---------------------------------------------------------------------- (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: Mr. Littlechild has the sole power to vote or direct the vote as to the 22,625 Shares of the Issuer's Common Stock beneficially owned by him. (ii) Shared power to vote or to direct the vote: HCV V, HCP V, Drs. Cavanaugh and Mirabelli and Messrs. Werner, Crouse, Littlechild and Lawlor share the power to vote or direct the vote of those Shares owned by HCV V. (iii) Sole power to dispose or to direct the disposition of: Mr. Littlechild has the sole power to dispose of or to direct the disposition of the 22,625 Shares of the Issuer's Common Stock beneficially owned by him. (iv) Shared power to dispose or to direct the disposition of: HCV V, HCP V, Drs. Cavanaugh and Mirabelli and Messrs. Werner, Littlechild, Crouse and Lawlor share the power to dispose of or direct the disposition of those Shares owned by HCV V. Item 5. Ownership of Five Percent or Less of a Class. If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities check the following [ ]. Not Applicable ---------------------------------------------------------------------- Item 6. Ownership of More Than Five Percent on Behalf of Another Person. Not Applicable. ---------------------------------------------------------------------- Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. Not Applicable. ---------------------------------------------------------------------- Item 8. Identification and Classification of Members of the Group. Not Applicable. ---------------------------------------------------------------------- Item 9. Notice of Dissolution of Group. Not Applicable. ---------------------------------------------------------------------- Item 10. Certifications. By signing below, I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the Issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. - -------- 2 Does not include options to purchase an additional 375 Shares of the Issuer's Common Stock which were granted to Mr. Crouse as a director of the Issuer and which are not currently exercisable within 60 days of 12/31/03. These options become exercisable as to 125 Shares per month for 3 months beginning on March 16, 2004. Mr. Littlechild is not deemed to beneficially own these Shares at the date of this report. 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. February 17, 2004 HealthCare Ventures V, L.P. Princeton, New Jersey By: its General Partner, HealthCare Partners V, L.P. By: /s/ Jeffrey Steinberg ----------------------------------------- Jeffrey Steinberg, Administrative Partner February 17, 2004 HealthCare Partners V, L.P. Princeton, New Jersey By: /s/ Jeffrey Steinberg ----------------------------------------- Jeffrey Steinberg, Administrative Partner February 17, 2004 /s/ James H. Cavanaugh, Ph.D Princeton, New Jersey ----------------------------------------------- James H. Cavanaugh, Ph.D February 17, 2004 /s/ Harold Werner Princeton, New Jersey ----------------------------------------------- Harold Werner February 17, 2004 /s/ William Crouse Princeton, New Jersey ----------------------------------------------- William Crouse February 17, 2004 /s/ John W. Littlechild Cambridge, Massachusetts ----------------------------------------------- John W. Littlechild February 17, 2004 /s/ Christopher Mirabelli, Ph.D. Cambridge, Massachusetts ----------------------------------------------- Christopher Mirabelli, Ph.D. February 17, 2004 /s/ Augustine Lawlor Cambridge, Massachusetts ----------------------------------------------- Augustine Lawlor EXHIBIT A AGREEMENT JOINT FILING OF SCHEDULE 13G The undersigned hereby agree to jointly prepare and file with regulatory authorities a Schedule 13G and any future amendments thereto reporting each of the undersigned's ownership of securities of Dyax Corp. Corporation and hereby affirm that such Schedule 13G is being filed on behalf of each of the undersigned. February 17, 2004 HealthCare Ventures V, L.P. Princeton, New Jersey By: its General Partner, HealthCare Partners V, L.P. By: /s/ Jeffrey Steinberg ----------------------------------------- Jeffrey Steinberg, Administrative Partner February 17, 2004 HealthCare Partners V, L.P. Princeton, New Jersey By: /s/ Jeffrey Steinberg ----------------------------------------- Jeffrey Steinberg, Administrative Partner February 17, 2004 /s/ James H. Cavanaugh, Ph.D Princeton, New Jersey ----------------------------------------------- James H. Cavanaugh, Ph.D February 17, 2004 /s/ Harold Werner Princeton, New Jersey ----------------------------------------------- Harold Werner February 17, 2004 /s/ William Crouse Princeton, New Jersey ----------------------------------------------- William Crouse February 17, 2004 /s/ John W. Littlechild Cambridge, Massachusetts ----------------------------------------------- John W. Littlechild February 17, 2004 /s/ Christopher Mirabelli, Ph.D. Cambridge, Massachusetts ----------------------------------------------- Christopher Mirabelli, Ph.D. February 17, 2004 /s/ Augustine Lawlor Cambridge, Massachusetts ----------------------------------------------- Augustine Lawlor Note. Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties for whom copies are to be sent. Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001). -----END PRIVACY-ENHANCED MESSAGE-----