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Nemtabrutinib

Phase 3

Chronic Lymphocytic Leukemia | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: May 28, 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
RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment1,500
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06136559A Study of Nemtabrutinib (MK-1026) Versus Comparator (Investigator's Choice of Ibrutinib or Acalabrutinib) in First Line (1L) Chronic Lymphocytic Leukemia (CLL)/ Small Lymphocytic Lymphoma (SLL) (MK-1026-011/BELLWAVE-011)PHASE3 RECRUITING 1,200Dec 13, 2023Sep 7, 2032May 28, 2026198 United States, Australia +27
NCT05624554A Study of Nemtabrutinib vs Chemoimmunotherapy for Participants With Previously Untreated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (CLL/SLL) Without TP53 Aberrations (MK-1026-008, BELLWAVE-008)PHASE3 ACTIVE NOT_RECRUITING 300Mar 16, 2023Mar 17, 2031Mar 16, 202697 United States, Australia +19
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Study Endpoints
Primary Endpoints
Objective Response Rate (ORR) per Chronic Lymphocytic Leukemia (iwCLL) Criteria 2018 as assessed by Blinded Independent Central Review (BICR)
Up to ~33 months

ORR is defined as the percentage of participants with complete response (CR), complete response with an incomplete recovery of the participant's bone marrow (CRi), nodular partial response (nPR), or partial response (PR), per iwCLL Criteria 2018 as assessed by BICR.

Progression-Free Survival (PFS) per iwCLL Criteria 2018 as assessed by BICR
Up to ~104 months

PFS is defined as the time from randomization to the first documented progressive disease (PD) or death due to any cause, whichever occurs first. PD is evaluated per iwCLL Criteria 2018 as assessed by BICR.

Progression-Free Survival (PFS) per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) Criteria 2018 as Assessed by Blinded Independent Central Review (BICR)
Up to approximately 49 months

PFS is defined as the time from randomization to the first documented progressive disease (PD) or death due to any cause, whichever occurs first. PD is evaluated per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) criteria 2018 as assessed by blinded independent central review (BICR).

Secondary Endpoints
Overall Survival (OS)
Up to ~104 months
Duration of Response (DOR) per iwCLL Criteria 2018 as assessed by BICR
Up to ~104 months
Number of Participants Who Experience One or More Adverse Events (AEs)
Up to ~104 months
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
NemtabrutinibEXPERIMENTALParticipants will receive nemtabrutinib at specified dose until disease progression, unacceptable toxicity or until discontinuation criteria are met.
Ibrutinib/AcalabrutinibACTIVE_COMPARATORParticipants will receive investigator's choice of ibrutinib or acalabrutinib at specified dose until disease progression, unacceptable toxicity or until discontinuation criteria are met.
FCR or BRACTIVE_COMPARATORInvestigator's choice of fludarabine plus cyclophosphamide plus rituximab (FCR) OR bendamustine plus rituximab (BR). Participants will receive either rituximab or specified approved rituximab biosimilar.
Interventions
NameTypeDescription
NemtabrutinibDRUGAdministered orally
IbrutinibDRUGAdministered orally
AcalabrutinibDRUGAdministered orally
FludarabineDRUG25 mg/m\^2 administered via intravenous (IV) infusion on Days 1, 2, and 3 of each 28-day cycle up to 6 cycles.
CyclophosphamideDRUG250 mg/m\^2 administered via IV infusion on Days 1, 2, and 3 of each 28-day cycle up to 6 cycles.
BendamustineDRUGAdministered via IV infusion on Days 1 and 2 of each 28-day cycle up to 6 cycles. The first dose is given as 70 to 90 mg/m\^2. Subsequent doses may be escalated up to 90 mg/m\^2, if applicable and as per local guidelines.
RituximabBIOLOGICALAdministered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.
TruximaBIOLOGICALAdministered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.
RuxienceBIOLOGICALAdministered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.
RiabniBIOLOGICALAdministered as an IV infusion on Day 1 of each 28-day cycle. The initial dose is 375 mg/m\^2 (cycle 1) followed by 500 mg/m\^2 for remaining cycles.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites198

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Confirmed diagnosis of CLL/SLL and active disease clearly documented to have a need to initiate therapy. * Has at least 1 marker of disease burden. * Has an Eastern Cooperative Oncology Group (ECOG) per...

Countries:United StatesAustraliaBelgiumBrazilCanadaChileChinaColombiaCzechiaDenmarkGermanyGreeceHong KongIsraelJapanMalaysiaMexicoNew ZealandNorwayPeruPolandPortugalSouth AfricaSpainSwedenTaiwanThailandTurkey (Türkiye)United KingdomBulgariaGuatemalaHungaryLithuaniaRomaniaSingaporeUkraine
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Recent Changes (Last 90 Days)
LOWMay 29, 2026NCT06136559lastUpdatePostDate: changed
LOWMay 29, 2026NCT06136559lastUpdatePostDate: changed
LOWMay 29, 2026NCT06136559lastUpdatePostDate: changed
LOWMay 27, 2026NCT06136559lastUpdatePostDate: changed
LOWMay 27, 2026NCT06136559lastUpdatePostDate: changed
LOWMay 26, 2026NCT06136559primaryCompletionDate: changed
LOWMay 26, 2026NCT05624554primaryCompletionDate: changed
LOWMay 24, 2026NCT06136559studyFirstPostDate: changed
LOWMay 24, 2026NCT05624554studyFirstPostDate: changed