A Study of LY4101174 in Participants With Recurrent, Advanced or Metastatic Solid Tumors

This is a Phase 1a/1b multicenter, open-label study in participants with select advanced or metastatic solid tumors. This study is comprised of two phases: Dose Escalation and Dose Optimization (1a), and Dose expansion (1b). Phase 1a will assess the safety, tolerability, and pharmacokinetics of LY4101174 to determine the recommended phase 2 dose (RP2D)/optimal dose. Phase 1b will evaluate efficacy and safety of LY4101174 at the RP2D/optimal dose in 7 expansion cohorts based on tumor type and/or treatment history. At the completion of the trial, participants will have the option to continue receiving study drug at the discretion of the study doctor.