A Phase 1 Study of BMS-986500 as Monotherapy or Combination Therapy in Advanced Solid Tumors

The purpose of this study is to assess BMS-986500 as monotherapy in advanced solid tumors and as combination therapy in CDK4/6 inhibitor pre-treated advanced breast cancer.

Inclusion Criteria: * Participants must be ≥ 18 years of age. * Participants must have histologically confirmed diagnosis of a locally advanced, unresectable, or metastatic solid tumor malignancy. * Participants must have a measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 * Participants must have a stable Eastern Cooperative Oncology Group Performance Status of 0 or 1. * For Part 2A only, participants must have CCNE1-amplified ovarian cancer Exclusion Criteria: * Participants must not have an active brain metastasis. * Participants must not have impaired cardiac function or clinically significant cardiac disease. * Participants must not have bleeding disorder or any history of clinically significant bleeding within the prior 3 months. * Participants must not have Grade ≥ 2 peripheral neuropathy. * Other protocol-defined Inclusion/Exclusion criteria apply.