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bb2121

Phase 3

Multiple Myeloma | Monoclonal antibody | Oncology |Bristol-Myers Squibb Company|Last Updated: Mar 4, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedCONTROLLEDDMCBiomarker
Total Trials5
Total Enrollment922
FDA Designations
No designations recorded
Clinical Trials (5)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03651128Efficacy and Safety Study of bb2121 Versus Standard Regimens in Subjects With Relapsed and Refractory Multiple Myeloma (RRMM)PHASE3 ACTIVE NOT_RECRUITING 381Apr 16, 2019Apr 8, 2027Dec 15, 202260 United States, Belgium +11
NCT03601078An Efficacy and Safety Study of bb2121 in Subjects With Relapsed and Refractory Multiple Myeloma and in Subjects With High-Risk Multiple MyelomaPHASE2 COMPLETED 312Dec 13, 2018Jan 15, 2026Mar 4, 202625 United States, France +4
NCT03361748Efficacy and Safety Study of bb2121 in Subjects With Relapsed and Refractory Multiple MyelomaPHASE2 COMPLETED 149Dec 13, 2017Dec 20, 2023May 23, 202548 United States, Belgium +6
NCT04196491A Study to Evaluate the Safety of bb2121 in Subjects With High Risk, Newly Diagnosed Multiple Myeloma (NDMM)PHASE1 COMPLETED 13May 27, 2020Jun 7, 2023Aug 23, 202322 United States
NCT02658929Study of bb2121 in Multiple MyelomaPHASE1 COMPLETED 67Dec 22, 2015Sep 22, 2022Jan 23, 20239 United States
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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 — N/A
SexALL
Healthy VolunteersNo
Study Sites60

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 228 trials
CompanyTickerTrialsLead PhaseDrugs
Johnson & JohnsonJNJ30PHASE3Daratumumab, Lenalidomide, Bortezomib, Dexamethasone, Cilta-cel
AbbVie, Inc.ABBV16PHASE3Pomalidomide, Dexamethasone, Venetoclax, Etentamig, Carfilzomib
Bristol-Myers Squibb CompanyBMY19PHASE3Mezigdomide, Carfilzomib, Dexamethasone, Daratumumab, Bortezomib
Takeda Pharmaceutical Co. Ltd. Sponsored ADRTAK5PHASE3IGI, 10%, Clarithromycin, Dexamethasone, Ixazomib, Pomalidomide
GSK plc Sponsored ADRGSK17PHASE3Belantamab mafodotin, Pomalidomide, Dexamethasone, Bortezomib, Daratumumab
Regeneron Pharmaceuticals, Inc.REGN12PHASE3Linvoseltamab, Daratumumab, Carfilzomib, Dexamethasone, Pomalidomide
Pfizer Inc.PFE12PHASE3Elranatamab, Lenalidomide, Elotuzumab, Pomalidomide, Dexamethasone
Sanofi SA Sponsored ADRSNY18PHASE3Isatuximab, 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, Bortezomib
Grifols, S.A. Sponsored ADR Class BGRFS1PHASE3Xembify
BioLineRX Ltd. Sponsored ADRBLRX1PHASE3BL-8040 /kg + G-CSF
C4 Therapeutics, Inc.CCCC3PHASE2Cemsidomide, Dexamethasone, cemsidomide, Elranatamab
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
Eli Lilly and CompanyLLY1PHASE1LOXO-338, Pirtobrutinib
Moderna, Inc.MRNA2PHASE1mRNA-2808
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT03651128primaryCompletionDate: changed
LOWMay 24, 2026NCT03651128studyFirstPostDate: changed
MEDIUMApr 8, 2026NCT03601078TRIAL_REMOVED: changed
MEDIUMApr 8, 2026NCT03601078TRIAL_REMOVED: changed