X0202 4 2005-07-29 0001070494 ACADIA PHARMACEUTICALS INC ACAD 0001140484 OXFORD BIOSCIENCE PARTNERS IV LP 222 BERKELEY ST. BOSTON MA 02116 0 0 1 0 0001161302 MRNA FUND II LP 222 BERKELEY ST. BOSTON MA 02116 0 0 1 0 0001286541 OBP MANAGEMENT IV LP 222 BERKELEY ST. BOSTON MA 02116 0 0 1 0 0001261294 BARNES JEFFREY T 222 BERKELEY ST. BOSTON MA 02116 0 0 1 0 0001286397 CARTHY MARK 222 BERKELEY ST. BOSTON MA 02116 0 0 1 0 0001262294 FLEMING JONATHAN 222 BERKELEY ST. BOSTON MA 02116 0 0 1 0 0001286396 LYTTON MICHAEL 222 BERKELEY ST. BOSTON MA 02116 0 0 1 0 0001214273 WALTON ALAN G 222 BERKELEY ST. BOSTON MA 02116 1 0 1 0 Common Stock Warrant (right to buy) 8.148 2005-07-29 4 P 0 89900 3.09 A 2005-10-17 2010-04-19 Common Stock 89900 236500 D Securities held of record by Oxford Bioscience Partners IV L.P. ("Oxford IV"). By virtue of their relationship as affiliated limited partnerships, whose sole general partner shares individual general partners, Oxford IV and mRNA Fund II L.P. ("mRNA") may be deemed to share voting power and the power to direct the disposition of the shares which each partnership owns of record. OBP Management IV L.P. ("OBP IV") (as the general partner of Oxford IV), may also be deemed to own beneficially the shares held of record by Oxford IV. Each of Messrs. Barnes, Carthy, Fleming, Lytton, and Walton (who is a Director of the Issuer), the individual general partners of OBP IV, may be deemed to own beneficially the shares held by Oxford IV. The reporting persons disclaim beneficial ownership of the securities except to the extent of their pecuniary interest therein. /s/ Raymond Charest, as attorney-in-fact for Jonathan J. Fleming, as general partner of the general partner of Oxford Bioscience Partners IV L.P. 2005-08-02 /s/ Alexia Pearsall, as attorney-in-fact for Jonathan J. Fleming, as general partner of the general partner of mRNA Fund II L.P. 2005-08-02 /s/ Raymond Charest, as attorney-in-fact for Jonathan J. Fleming, as general partner of OBP Management IV L.P. 2005-08-02 /s/ Raymond Charest, as attorney-in-fact for Jeffrey T. Barnes 2005-08-02 /s/ Raymond Charest, as attorney-in-fact for Mark P. Carthy 2005-08-02 /s/ Raymond Charest, as attorney-in-fact for Jonathan J. Fleming 2005-08-02 /s/ Michael E. Lytton 2005-08-02 /s/ Raymond Charest, as attorney-in-fact for Alan G. Walton 2005-08-02