A Randomized, Double Blind, Multicenter Phase 3 Trial of BMS-986489 (Atigotatug+Nivolumab Fixed Dose Combination) in Combination With Carboplatin Plus Etoposide vs Atezolizumab in Combination With Carboplatin Plus Etoposide as First-Line Therapy in Participants With Extensive-Stage Small Cell Lung Cancer (TIGOS).

Inclusion Criteria * Participants must have diagnosis of Extensive-Stage Small Cell Lung Cancer (ES-SCLC). * Participants must be Healthy enough to do their normal activities with little or no help based on the ECOG performance scale. * Participants must have at least one tumor that can be measured using special imaging techniques like a CT scan or MRI at a site other than the brain and nervous system Exclusion Criteria * Participants have already received certain types of treatment for extensive stage small cell lung cancer * Participants have certain health conditions, like spread of smal…