X0306 4 2022-04-01 0 0001061983 CYTOKINETICS INC CYTK 0001235945 WIERENGA WENDALL 350 OYSTER POINT BLVD SOUTH SAN FRANCISCO CA 94080 1 0 0 0 Common Stock 2022-04-01 4 A 0 146 38.38 A 7033 D Shares issued at Reporting Person's election pursuant to Issuer's stock in lieu of cash for all or part of directors' annual base retainer program. Shares are fully vested from the moment of grant. Shares issued at per share price of $38.38, representing the Issuer's closing stock price on April 1, 2022. Wendell Wierenga 2022-04-01