A Phase 1b Open-label, Multicenter Study Evaluating the Safety, Tolerability, and Efficacy of Xaluritamig in Combination With Androgen Receptor Pathway Inhibitors in Participants With Metastatic Hormone-sensitive Prostate Cancer

Inclusion Criteria: * Participants must have histological, pathological, and/or cytological confirmation of adenocarcinoma of the prostate. Mixed histologies (eg, adenocarcinoma with neuroendocrine component) are not permitted. * Participants must have at the time of diagnosis: * De novo (synchronous) mHSPC, defined as metastatic disease with no prior diagnosis of localized prostate cancer, AND started ADT (LHRH agonist/antagonist or orchiectomy) with or without ARPI (defined as abiraterone OR darolutamide) as SOC, first treatment with ADT should be no longer than 12 weeks before screening…