A Study of XB371 Administered in Participants With Locally Advanced or Metastatic Solid Tumors

A Dose Escalation and Expansion Study of XB371 Administered in Participants With Locally Advanced or Metastatic Solid Tumors

The primary purpose of the study is to characterize the safety and tolerability of XB371. The dose-escalation cohorts and Part B of the expansion cohorts are non-randomized. Part A of the expansion cohorts is randomized.

Key Inclusion Criteria:

• Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1.
• Minimum life expectancy of ≥ 12 weeks.
• Recurrent locally advanced or metastatic solid tumors.
• Adequate end organ and bone marrow function.

Key Exclusion Criteria:

• Primary brain tumors or known active brain metastases, leptomeningeal, or cranial epidural disease.
• History of interstitial lung disease (ILD) of any grade or history of organizing pneumonia.
• Has acute ocular infection, acute or chronic ulcerative/cicatricial condition of conjunctiva or cornea.
• Known history of immunodeficiency virus (HIV) unless specific criteria are met.
• Active infection with hepatitis C virus (HCV) defined as positive for HCV antibody.
• Major surgery within 4 weeks before the first dose of study treatment.
• Received radiation therapy within 2 weeks before the first dose of study treatment.
• Received prior systemic anticancer therapy including investigational agents within 4 weeks before the first dose of study treatment.

NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.