AMV564-301 is a Phase 1, open-label, multicenter dose-escalation with expansion trial in patients with locally advanced or metastatic solid tumors. In the dose-escalation portion of the study, cohorts of patients will receive AMV564 alone or in combination with Pembrolizumab at increasing dose levels to determine the maximum tolerated dose (MTD) and/or the recommended dose for expansion. In the expansion portion of the study, one or more cohorts of patients will receive AMV564 at the MTD or recommended dose to further evaluate safety, tolerability, and clinical activity.