X0306 4 2021-02-04 0 0001070494 ACADIA PHARMACEUTICALS INC ACAD 0001746240 KIM AUSTIN D. C/O ACADIA PHARMACEUTICALS INC. 12830 EL CAMINO REAL, SUITE 400 SAN DIEGO CA 92130 0 1 0 0 EVP & General Counsel Common Stock 2021-02-04 4 A 0 6009 0.00 A 12018 D Common Stock 2021-02-04 4 S 0 2107 50.61 D 9911 D On April 29, 2019, the reporting person was granted Restricted Stock Units (RSU's) that vest upon the Issuer's satisfaction of certain performance criteria. On February 4, 2021, the Issuer's Compensation Committee determined that certain performance criteria was achieved, resulting in the vesting of the RSU's as to the number of shares reported in column 4 of row 1 above. The sales reported in this Form 4 were made to cover the tax obligation that occurred upon the vesting of restricted stock units. /s/ Austin D. Kim 2021-02-08