Long-Term Extension Study for Participants Previously Enrolled in an Exelixis-Sponsored Study

Key Inclusion Criteria: * Eligible to continue receiving the study treatment in the parent study (that is, has not met parent study discontinuation/withdrawal criteria). * Continuing to derive clinical benefit from the study treatment at the time of transition from the parent study as assessed by the investigator. * Able to comply with the long-term extension study protocol as determined by the investigator. * Able to receive the first dose of study treatment in this extension study within the specified treatment interruption window allowed by the parent study. Key Exclusion Criteria: * Meet any of the study treatment discontinuation criteria specified in the parent study at the time of enrollment in this extension study. * Study treatment is commercially marketed in the participant's country for the participant-specific disease and is accessible to the participant. * Treatment with any anticancer treatment (other than treatment permitted in the parent study) during the time between last treatment in the parent study and the first dose of study treatment in this long-term extension study. * Permanent discontinuation of all study treatment(s) for any reason during the parent study or during the time between last treatment in the parent study and the first dose of study treatment in this long-term extension study (if applicable). * Concurrent participation in any therapeutic clinical trial (other than the parent study). NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.