X0306 4 2020-07-07 0 0001070494 ACADIA PHARMACEUTICALS INC ACAD 0001702283 YANG MICHAEL J. C/O ACADIA PHARMACEUTICALS INC. 3611 VALLEY CENTRE DRIVE, STE. 300 SAN DIEGO CA 92130 0 1 0 0 EVP and CCO Common Stock 2020-07-07 4 M 0 7500 19.98 A 12704 D Common Stock 2020-07-07 4 M 0 5000 21.28 A 17704 D Common Stock 2020-07-07 4 M 0 14750 25.12 A 32454 D Common Stock 2020-07-07 4 S 0 16150 56.0503 D 16304 D Common Stock 2020-07-07 4 S 0 11100 56.5382 D 5204 D Stock Option (Right to Buy) 19.98 2020-07-07 4 M 0 7500 0.00 D 2028-04-17 Common Stock 7500 570000 D Stock Option (Right to Buy) 21.28 2020-07-07 4 M 0 5000 0.00 D 2028-10-14 Common Stock 5000 25000 D Stock Option (Right to Buy) 25.12 2020-07-07 4 M 0 14750 0.00 D 2029-04-29 Common Stock 14750 44292 D The sales reported in this Form 4 were effected pursuant to an amended Rule 10b5-1 stock sale plan dated May 12, 2020. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.39 to $56.39, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $56.395 to $56.685, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. 25% of the 600,000 shares originally subject to the Stock Option vested and became exercisable on April 18, 2019. The remaining shares vest and become exercisable thereafter in 36 equal monthly installments 25% of the 40,000 shares originally subject to the Stock Option vested and became exercisable on October 15, 2019. The remaining shares vest and become excercisable thereafter in 36 equal monthly installments. 25% of the 59,042 shares originally subject to the Stock Option vested and became exercisable on April 29, 2020. The remaining shares vest and become exercisable thereafter in 36 equal monthly installments. /s/ Austin D. Kim, Attorney-in-Fact 2020-07-09