Main telephone: (650) 624-3000 or (833) 624-2640

Investor Relations: [email protected]

Human Resources: [email protected]

Public Relations: [email protected]

To report a compliance or ethical concern, please call 1-800-789-5095 or visit http://cytokinetics.ethicspoint.com .

For medical inquiries, please visit our Medical Information Request page or call 833-MEDCYTO (833-633-2986).

TDD/TTY: Callers who are hearing-impaired may use the 711 Telecommunications Relay Service for assistance.