X0306 4 2023-02-03 0001061983 CYTOKINETICS INC CYTK 0001777562 Wong Robert 350 OYSTER POINT BLVD SOUTH SAN FRANCISCO CA 94080 1 VP, Chief Accounting Officer Common Stock 2023-02-03 4 S 0 3004 45.00 D 27533 D Transaction effected pursuant to a 10b5-1 plan meeting the requirements of Rule 10b5-1(c) under the Exchange Act entered into by the Reporting Person on December 22, 2022. /s/ John Faurescu, attorney-in-fact for Mr. Wong 2023-02-06