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bb2121

Phase 3

Multiple Myeloma | Monoclonal antibody | Oncology |Bristol-Myers Squibb Company|Last Updated: Jun 22, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDDMC
Total Trials5
Total Enrollment927

FDA Designations

No designations recorded

Clinical trial landscape

bb2121 · 5 trials · 1 indication

Phase 3 1Phase 2 2Phase 1 2
NCT03651128Efficacy and Safety Study of bb2121 Versus Standard Regimens in Subjects With Relapsed and Refractory Multiple Myeloma (RRMM)Multiple Myeloma
COMPLETED386 Analytics
PHASE3COMPLETED
Efficacy and Safety Study of bb2121 Versus Standard Regimens in Subjects With Relapsed and Refractory Multiple Myeloma (RRMM)
Multiple MyelomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression-free Survival (PFS)
Minimum of 5 years from randomization

Time from randomization to the first documentation of progressive disease based on the International Myeloma Working Group (IMWG) Uniform Response Criteria for Multiple Myeloma assessed by an independent response committee (IRC) or death due to any cause, whichever occurs first.

Overall response rate (ORR)- Cohort 1
Up to approximately 5 years (Participants will transition to the long term follow-up (LTFU) study after a minimum of 12 months post-infusion for Cohorts 1, 2a, 2b, and 2c; and after a minimum of 6 months post-infusion for Cohort 1b, at their next visit)

Percentage of subjects who achieved partial response (PR) or better according to IMWG Uniform Response Criteria for Multiple Myeloma as assessed by the investigator

Complete response (CR) rate - Cohort 1b, 2a, 2b, 2c, and Cohort 3
Up to approximately 5 years (Participants will transition to the LTFU study after a minimum of 12 months post-infusion for Cohorts 1, 2a, 2b, and 2c; and after a minimum of 6 months post-infusion for Cohort 1b, at their next visit)

Percentage of subjects who achieved CR or stringent CR according to IMWG Uniform Response Criteria for Multiple Myeloma as assessed by the investigator

Overall Response Rate
From first dose to 24 Months

Number of participants who achieved partial response (PR) or better according to IMWG Uniform Response Criteria for Multiple Myeloma as assessed by an independent response committee (IRC).

Dose-limiting toxicity (DLT) rates
Up to completion of DLT period after last subject bb2121 infused

DLTs will be assessed during the DLT interval (ie, within 21 days immediately after bb2121 infusion). DLTs are defined as any bb2121 related Grade 3 to 5 toxicity.

Adverse Events (AEs)
Approximately 2 years after last subject bb2121 infused

An AE is any noxious, unintended, or untoward medical occurrence that may appear or worsen in a subject during the course of a study. It may be a new intercurrent illness, a worsening concomitant illness, an injury, or any concomitant impairment of the subject's health, including laboratory test values, regardless of etiology. Any worsening (ie, any clinically significant adverse change in the frequency or intensity of a preexisting condition) should be considered an AE.

Incidence of adverse events (AEs) and abnormal laboratory test results, including dose limiting toxicities (DLTs)
Day 1 through Month 60

Secondary Endpoints

Overall Survival (OS)
Minimum of 5 years from randomization
Event-free Survival (EFS)
Minimum of 5 years from randomization
Overall Response Rate (ORR)
Minimum of 5 years from randomization
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Arm A - Administration of bb2121EXPERIMENTALbb2121 autologous CAR T cells will be infused at a dose ranging from 150 - 450 x 10\^6 CAR+ T cells after receiving lymphodepleting chemotherapy
Arm B- standard regimens as per Investigator's discretionEXPERIMENTALThe participants will receive one of following regimens dependent on the subject's most recent anti-myeloma treatment regimen: * Daratumumab (DARA) in combination with pomalidomide (POM) and low-dose dexamethasone (dex) (DPd) OR * DARA in combination with bortezomib (BTZ) and low-dose dex (DVd) OR * Ixazomib (IXA) in combination with lenalidomide (LEN) and low-dose dex (IRd) OR * Carfilzomib (CFZ) in combination with low-dose dexamethasone (Kd) OR * Elotuzumab (ELO) in combination with POM and low-dose dexamethasone (EPd)
Cohort 1: BB2121 in relapsed and refractory multiple myeloma participantsEXPERIMENTALbb2121 autologous CAR T cells will be infused at a dose ranging from 150 - 450 x 10\^6 CAR+ T cells after receiving lymphodepleting chemotherapy
Cohort 1b: BB2121 with talquetamab in relapsed and refractory multiple myeloma participantsEXPERIMENTAL -
Cohort 2a: BB2121 in multiple myeloma with Autologous stem cell transplantation participantsEXPERIMENTAL -
Cohort 2b: BB2121 in multiple myeloma without Autologous stem cell transplantation participantsEXPERIMENTAL -
Cohort 2c: BB2121 in multiple myeloma participants with inadequate response post ASCTEXPERIMENTAL -
Cohort 3: BB2121 with lenalidomide maintenance in newly diagnosed multiple myelomaEXPERIMENTAL -
Administration of bb2121EXPERIMENTALbb2121 autologous CAR T cells will be infused at a dose ranging from 15 - 450 x 10\^6 CAR+ T cells after receiving lymphodepleting chemotherapy.
Dose EscalationEXPERIMENTAL* bb2121 autologous CAR T cells will be infused at a dose ranging from 150 - 800 x 10\^6 CAR+ T cells after receiving lymphodepleting chemotherapy with a planned starting dose of 450 x 10\^6 CAR+ T cells. * Lenalidomide maintenance therapy is recommended for all patients and should be initiated upon adequate bone marrow recovery or from 90-day post-bb2121 infusion, whichever is later
bb2121EXPERIMENTALbb2121 autologous CAR T cells will be infused at a dose ranging from 150 - 450 x 10\^6 CAR+ T cells after receiving lymphodepleting chemotherapy

Interventions

NameTypeDescription
bb2121BIOLOGICALbb2121
DaratumumabDRUGDaratumumab
PomalidomideDRUGPomalidomide
DexamethasoneDRUGDexamethasone
BortezomibDRUGBortezomib
IxazomibDRUGIxazomib
LenalidomideDRUGLenalidomide
CarfilzomibDRUGCarfilzomib
ElotuzumabDRUGElotuzumab
LenalomideDRUGSpecified dose on specified days
TalquetamabDRUGSpecified dose on specified days
FludarabineDRUGLymphodepleting Chemotherapy
CyclophosphamideDRUGLymphodepleting Chemotherapy
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites62

Inclusion Criteria: Subjects must satisfy the following criteria to be enrolled in the study: 1. Subject is ≥ 18 years of age at the time of signing the informed consent form (ICF). 2. Subject must understand and voluntarily sign an ICF prior to any study-related assessments/procedures being condu...

Countries:United StatesBelgiumCanadaFranceGermanyItalyJapanNetherlandsNorwaySpainSwedenSwitzerlandUnited Kingdom
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Competitive Landscape -Multiple Myeloma 221 trials

Top 20 of 25 competitors

CompanyTickerTrialsLead PhaseDrugs
AbbVie, Inc.ABBV16PHASE3Pomalidomide, Dexamethasone, Venetoclax
Bristol-Myers Squibb CompanyBMY18PHASE3Iberdomide, Lenalidomide
Takeda Pharmaceutical Co. Ltd. Sponsored ADRTAK5PHASE3IGI, 10%
GSK plc Sponsored ADRGSK17PHASE3Belantamab mafodotin, Pomalidomide, Dexamethasone, Bortezomib
Johnson & JohnsonJNJ28PHASE3Talquetamab, Pomalidomide, Teclistamab, Elotuzumab, Dexamethasone
Regeneron Pharmaceuticals, Inc.REGN11PHASE3Linvoseltamab, Carfilzomib, Daratumumab, Dexamethasone, Pomalidomide
Pfizer Inc.PFE11PHASE3Elranatamab, Lenalidomide
Sanofi SA Sponsored ADRSNY17PHASE3Isatuximab, Dexamethasone, Pomalidomide, Montelukast, Paracetamol/ Acetaminophen
AstraZeneca PLCAZN5PHASE3AZD0120, Daratumumab, Carfilzomib, Dexamethasone, Bortezomib
Gilead Sciences, Inc.GILD3PHASE3Anitocabtagene Autoleucel, Cyclophosphamide, Fludarabine, Pomalidomide, Bortezomib
Karyopharm Therapeutics, Inc.KPTI6PHASE3Selinexor, Elotuzumab, Pomalidomide, Dexamethasone
Grifols, S.A. Sponsored ADR Class BGRFS1PHASE3Xembify
BioLineRX Ltd. Sponsored ADRBLRX1PHASE3BL-8040/kg, G-CSF
C4 Therapeutics, Inc.CCCC3PHASE2Cemsidomide, Dexamethasone
Cellectar Biosciences, Inc.CLRB1PHASE2Iopofosine I 131 single dose, Iopofosine I 131 fractionated dose
GeoVax Labs, Inc.GOVX1PHASE2COVID-19 Vaccine, Synthetic MVA-based SARS-CoV-2 Vaccine GEO-CM04S1
Autolus Therapeutics Plc Sponsored ADRAUTL1PHASE2AUTO CAR T cell therapy
Incyte CorporationINCY2PHASE1Ruxolitinib, Lenalidomide, Methylprednisolone
Moderna, Inc.MRNA2PHASE1mRNA-2808
BeOne Medicines Ltd. Sponsored ADRONC1PHASE1Sonrotoclax, Dexamethasone, Carfilzomib, Daratumumab, Pomalidomide
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Recent Changes (Last 90 Days)

MEDIUMJul 23, 2026NCT03651128TRIAL_REMOVED: changed
MEDIUMJul 23, 2026NCT03651128TRIAL_REMOVED: changed
MEDIUMJul 23, 2026NCT03651128TRIAL_REMOVED: changed
HIGHJun 22, 2026NCT03651128Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 22, 2026NCT03651128Status: ACTIVE_NOT_RECRUITING → COMPLETED

Frequently asked questions about bb2121

What is bb2121 used for?

bb2121 is an investigational monoclonal antibody being developed for the treatment of multiple myeloma, a cancer of plasma cells. It has been studied in patients with relapsed and refractory multiple myeloma, as well as in those with high-risk or newly diagnosed multiple myeloma. The drug is currently in Phase 3 clinical development.

Who makes bb2121?

bb2121 is being developed by Bristol-Myers Squibb Company, which trades under the ticker symbol BMY on the stock exchange. The company has conducted multiple clinical trials of bb2121 across various phases and countries, including the United States, Belgium, Canada, France, Germany, Italy, Japan, Spain, and the United Kingdom.

What phase is bb2121 in?

bb2121 is currently in Phase 3 clinical development for multiple myeloma. It has completed earlier phase trials, including Phase 1 and Phase 2 studies. As of now, bb2121 is not FDA approved and remains an investigational drug under clinical investigation for the treatment of multiple myeloma.

What clinical trials is bb2121 in?

bb2121 has been studied in several clinical trials, including NCT02658929, a Phase 1 study in multiple myeloma; NCT03361748, a Phase 2 study in relapsed and refractory multiple myeloma; NCT03601078, a Phase 2 study in relapsed and refractory and high-risk multiple myeloma; and NCT04196491, a Phase 1 study in high-risk newly diagnosed multiple myeloma. All trials have been completed.

Is bb2121 the same as idecabtagene vicleucel?

bb2121 is also known as idecabtagene vicleucel, a CAR T-cell therapy. It is being developed by Bristol-Myers Squibb for multiple myeloma. The drug has been evaluated in clinical trials for relapsed and refractory multiple myeloma and is currently in Phase 3 development.