X0306 4 2020-02-27 0 0001061983 CYTOKINETICS INC CYTK 0001316459 Cragg David 280 EAST GRAND AVENUE SOUTH SAN FRANCISCO CA 94080 0 1 0 0 SVP Human Resources Common Stock 2020-02-27 4 F 0 4150 13.94 D 110482 D The reporting person is reporting the withholding of shares of common stock to satisfy the reporting persons withholding obligations in connection with the vesting of Restricted Stock Units vested on 02/27/2020 and does not represent a sale by the reporting person. Includes up to 11,616 shares of common stock purchased pursuant to the Cytokinetics, Incorporated Employee Stock Purchase Plan. By: John Faurescu, Esq. For: David W. Cragg 2020-03-02