The purpose of this study is to evaluate the preliminary safety and determine the RP2D of mezigdomide in combination with elranatamab in participants with relapsed and refractory multiple myeloma (RRMM).

Inclusion Criteria:

• Age ≥18 with history of relapsed and refractory multiple myeloma (RRMM) treated with 2 to 4 prior lines of anti-myeloma therapy (Phase 1) or 1 to 3 prior lines of anti-myeloma therapy (Phase 2).
• Measurable MM by local laboratory.
• Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 to 1.
• Adherence to contraception requirements.

Exclusion Criteria:

• Prior treatment with mezigdomide.
• Prior treatment with T cell engaging or T cell engager (TCE).
• Prior treatment with B cell-maturation antigen (BCMA)-targeting therapy, with the exception of participants who have received autologous BCMA-targeted CART-cell therapy> 6 months from the start of study therapy
• Other protocol-defined Inclusion/Exclusion criteria apply.

BMS will provide access to individual anonymized participant data upon request from qualified researchers, and subject to certain criteria. Additional information regarding Bristol Myer Squibb's data sharing policy and process can be found at https://www.bms.com/researchers-and-partners/clinical-trials-and-research.html

See Plan Description

See Plan Description