RecruitingPhase 1Drug trialA Study of MT-303 in Adults With Advanced or Metastatic GPC3-Expressing Cancers, Including HCCThis is a multicenter, open-label, Phase 1, first-in-human, dose-escalation study designed to assess the safety, tolerability and define the RP2D of MT-303 alone (Module 1) and in combination with Atezo/Bev (Module 2) in participants with advanced hepatocellular carcinoma expressing GPC3.