S-095029

This is a Phase 1b/2 study evaluating the anti-PD1 antibody, cemiplimab, in combination with either S095018 (anti-TIM3 antibody), S095024 (anti-CD73 antibody), or S095029 (anti-NKG2A antibody) in adult participants with previously untreated advanced/metastatic non-small cell lung cancer (NSCLC) with high PD-L1 expression. The study includes two parts: part A, the combination-therapy safety lead-in phase to determine the recommended dose for expansion (RDE) for S095018, S095024, and S095029 in combination with cemiplimab and part B, the randomized dose expansion phase to assess the efficacy of S095018, S095024, or S095029 in combination with cemiplimab. Study treatment will be administered for a maximum of 108 weeks, or until confirmed disease progression per iRECIST and/ or until meeting other treatment discontinuation criteria.

The purpose of the study is to investigate the safety, tolerability, and preliminary anti-neoplastic activity of S095029 alone and in combination with Sym021 in patients with advanced solid tumor malignancies followed by an expansion phase of triple combinations.
*The study sponsor has made the decision not to move forward to the expansion part of the study due to strategic considerations, unrelated to any safety issues or concerns. The study will be stopped after completion of dose escalation parts 1a and 1b of the study.