Trial of Xaluritamig in Adults With Metastatic Castration-resistant Prostate Cancer

The primary objective of this trial is to determine the safety profile of xaluritamig at the proposed regimen in adult participants with metastatic castration-resistant prostate cancer (mCRPC).

Inclusion Criteria: * Histological, pathological, and/or cytological confirmation of adenocarcinoma of the prostate. Mixed histologies (eg, adenocarcinoma with neuroendocrine component) are not permitted. * mCRPC with ≥ 1 metastatic lesion that is present on baseline computed tomography (CT), magnetic resonance imaging (MRI), or bone scintigraphy imaging obtained within 28 days prior to enrollment. * Evidence of progressive disease, defined as 1 or more PCWG3 criteria: * Serum PSA progression defined as 2 consecutive increases in PSA over a previous reference value measured at least 1 week prior. The minimal start value is 2.0 ng/mL. * Soft tissue progression defined as an increase ≥ 20% and an absolute increase of ≥ 5 mm in the sum of the diameter (SOD) (short axis for nodal lesions and long axis for non-nodal lesions) of all target lesions based on the smallest SOD since treatment started or the appearance of one or more new lesions or unequivocal progression of existing non-target lesions. * Progression of bone disease defined by the appearance of at least 2 new bone lesions(s) by bone scintigraphy (as per the 2+2 PCWG3 criteria). * Prior orchiectomy and/or ongoing androgen-deprivation therapy and a castrate level of serum testosterone (\