A Study of BMS-986207 Given Alone and in Combination With Nivolumab or With Nivolumab and Ipilimumab in Advanced Solid Tumors

Inclusion Criteria:

1. Must have pre-existing or prior programmed death-ligand 1 (PD-L1) immunohistochemistry (IHC) results within 3 months of enrollment from testing of tumor tissue; PD-L1 expression must be tumor cell positive ≥ 1% for a participant to be eligible for enrollment
2. Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
3. Measurable disease by computed tomography (CT) or magnetic resonance imaging (MRI) per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 criteria; radiographic tumor assessment performed within 28 days before randomization

Exclusion Criteria:

1. Primary central nervous system (CNS) disease, or tumors with CNS metastases as the only site of disease. Controlled brain metastases will be allowed to enroll
2. Other active malignancy requiring concurrent intervention
3. Uncontrolled or significant cardiovascular disease
4. Active, known, or suspected autoimmune disease
5. NSCLC without prior treatment in the advanced or metastatic setting (Part 2C)

Other protocol-defined inclusion/exclusion criteria apply