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Nemtabrutinib

Phase 3

Chronic Lymphocytic Leukemia | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: Jul 24, 2026

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Trial Design
RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials3
Total Enrollment1,525
FDA Designations
No designations recorded
Clinical trial landscape

Nemtabrutinib · 16 trials · 24 indications

Phase 3 3Phase 2 2Phase 1 11
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)Chronic Lymphocytic Leukemia
RECRUITING1,200 Analytics
NCT05947851A Study of Nemtabrutinib Plus Venetoclax vs Venetoclax + Rituximab (VR) in Second-line (2L) + Relapsed/Refractory (R/R) Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (CLL/SLL) (MK-1026-010/BELLWAVE-010).Leukemia, Lymphocytic, Chronic, B-Cell
RECRUITING735 Analytics
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)Chronic Lymphocytic Leukemia
ACTIVE NOT_RECRUITING300 Analytics
PHASE3RECRUITING
A 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)
Chronic Lymphocytic LeukemiaUnlock trial analytics
PHASE3RECRUITING
A Study of Nemtabrutinib Plus Venetoclax vs Venetoclax + Rituximab (VR) in Second-line (2L) + Relapsed/Refractory (R/R) Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (CLL/SLL) (MK-1026-010/BELLWAVE-010).
Leukemia, Lymphocytic, Chronic, B-CellUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
A 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)
Chronic Lymphocytic LeukemiaUnlock trial analytics
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.

Part 1: Number of Participants Experiencing Dose-Limiting Toxicities (DLTs)
Up to approximately 12 Weeks

DLT evaluation period is defined as 8 weeks after the first dose of the combination treatment of nemtabrutinib plus venetoclax Cycle 2 Day 1 in Part 1 + 4 weeks follow up. Each cycle is 4 weeks. DLTs are: Grade ≥3 nonhematologic toxicity (except Grade 3 nausea, vomiting, diarrhea, rash, fatigue, and uncontrolled hypertension which will not be considered a DLT unless lasting ≥72 hours despite optimal supportive care); Grade 4 hematologic toxicity lasting \>7 days (except Grade 3 lymphocytosis, Grade 4 platelet count decreased of any duration, or Grade 3 platelet count decreased if associated with bleeding); any Grade 3 or Grade 4 nonhematologic laboratory abnormality if values result in drug-induced liver injury, or medical intervention is required, or the abnormality leads to hospitalization, or the abnormality persists for \>1 week (with exceptions); missing \>25% of nemtabrutinib or venetoclax doses as a result of drug-related adverse events during the first 2 cycles; Grade 5 toxicity.

Part 1: Number of Participants Experiencing Adverse Events (AEs)
Up to approximately 28 months

An AE is any untoward medical occurrence in a participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. The number of participants experiencing AEs will be reported for Part 1.

Part 1: Number of Participants Discontinuing Study Treatment Due to AEs
Up to approximately 25 months

An AE is any untoward medical occurrence in a participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. The number of participants discontinuing study treatment due to AEs will be reported for Part 1.

Part 2: PFS per the 2018 International Workshop on Chronic Lymphocytic Leukemia (iwCLL) Criteria as Assessed by Blinded Independent Central Review (BICR)
Up to approximately 71 months

PFS is defined as the time from randomization to the first documented disease progression per iwCLL criteria 2018 as accessed by BICR, or death due to any cause, whichever occurs first. PFS will be presented.

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).

Presence of undetectable minimal residual disease (MRD)
After 14 cycles of treatment (cycle length = 28 days)

As measured by Adaptive ClonoSeq next generation sequencing at a level of 10\^-6 in the peripheral blood after 14 cycles of treatment with nemtabrutinib and venetoclax. The rate of undetectable MRD will be calculated in all eligible patients who start any amount of study drug, and the 95% confidence interval will be provided with the estimated rate.

Part 2: Objective Response Rate (ORR) per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) criteria 2018 as assessed by independent central review (ICR)
Up to ~61 months

ORR per iwCLL 2018 criteria is defined as the percentage of participants achieving a complete response (CR), complete response with incomplete bone marrow recovery (CRi), nodular partial response (nPR), or partial response (PR). CR is defined as meeting the following criteria: no lymph nodes \>1.5 cm, spleen size \<13 cm, liver normal; no constitutional symptoms, normal lymphocyte count, platelets ≥100 x 10\^9/L; hemoglobin ≥11 g/dL; and normocellular marrow (no CLL cells or B lymphoid nodules). CRi is defined as meeting CR criteria but with hypocellular bone marrow. nPR is defined as having features of CR but with lymphoid nodules in the marrow. PR is defined as ≥50% decrease in ≥2 of the following: lymph nodes, liver and/or spleen size, lymphocytes PLUS ≥1 of the following met: platelets ≥100 x 10\^9/L or ≥50% increase from screening, hemoglobin \>11 g/dL or ≥50% increase from screening, CLL cells or B lymphoid nodules in marrow.

Part 2: ORR per Lugano criteria 2014 as assessed by ICR
Up to ~61 months

ORR per Lugano criteria 2014 is defined as the percentage of participants achieving a CR or PR. CR defined as EITHER CR by imaging (computed tomography \[CT\]): all lymph nodes normal (none ≥15 mm) and normal liver and spleen OR complete metabolic response (CMR): score of 1, 2 or 3 on the 5-point scale assessing fluorodeoxyglucose (FDG) metabolic activity in lymphomatous lesions (ranging from 1=no uptake above background to 5=uptake markedly higher than liver) AND bone marrow (BM) normal by morphology. PR defined as EITHER PR by imaging (CT) with ≥50% decrease in the sum of the product of diameters \[SPD\] of target lesions, no worsening of nontarget lesions, no new lesions and ≥50% spleen abnormal portion OR Partial Metabolic Response (PMR) with score of 4 or 5 on the FDG 5-point scale (with no new lesions) and decreased overall uptake AND residual BM abnormalities; OR CR by imaging with residual BM abnormalities; OR PR by imaging without residual BM abnormalities.

Part 2: ORR per International Workshop on Waldenström's Macroglobulinemia (IWWM) criteria 2014 as assessed by ICR
Up to ~71 months

ORR per IWWM criteria 2014 is defined as the percentage of participants achieving a CR, very good partial response (VGPR), or PR. CR is defined as all lymph nodes are normal in size (none ≥15 mm), liver and spleen normal in size, serum immunoglobulin M (IgM) values in the normal range, disappearance of monoclonal protein by immunofixation (confirmation needed with a second immunofixation at any subsequent timepoint), and no histological evidence of BM involvement. VGPR is defined as ≥50% decrease from baseline in SPD of lymph nodes (if abnormal at baseline), ≥50% decrease from baseline in the abnormal portion of the spleen (if previously abnormal), and ≥90% decrease from baseline in serum IgM, or serum IgM values in normal range. PR is defined as ≥50% decrease from baseline in SPD of lymph nodes (if abnormal at baseline), ≥50% decrease from baseline in serum IgM, and ≥50% decrease from baseline in the abnormal portion of the spleen (if previously abnormal).

Area Under the Concentration-Time Curve from Time 0 to Infinity (AUC0-Inf) of Nemtabrutinib
Up to approximately 4 weeks

Blood samples will be collected to determine the AUC0-inf of nemtabrutinib.

Maximum Plasma Concentration (Cmax) of Nemtabrutinib
Up to approximately 4 weeks

Blood samples will be collected to determine the Cmax of nemtabrutinib.

Area Under the Concentration-Time Curve from Time 0 to Last (AUC0-Last) of Nemtabrutinib
Up to approximately 4 weeks

Blood samples will be collected to determine the AUC0-last of nemtabrutinib.

Time to Maximum Plasma Concentration (Tmax) of Nemtabrutinib
Up to approximately 4 weeks

Blood samples will be collected to determine the Tmax of nemtabrutinib.

Apparent Terminal Half-life (t1/2) of Nemtabrutinib
Up to approximately 4 weeks

Blood samples will be collected to determine the t1/2 of nemtabrutinib.

Apparent Clearance (CL/F) of Nemtabrutinib
Up to approximately 4 weeks

Blood samples will be collected to determine the CL/F of nemtabrutinib.

Volume of Distribution During Terminal Phase (Vz/F) of Nemtabrutinib
Up to approximately 4 weeks

Blood samples will be collected to determine the Vz/F of nemtabrutinib.

Area Under the Curve from Dosing to Infinity (AUC0-inf) of Nemtabrutinib in Plasma
Predose, 0.5, 1, 2, 4, 6, 8, 12, 24, 48, 72, 96, 120, 144, 192, 240, and 336 hours postdose

The AUC0-inf of nemtabrutinib in plasma will be determined in each arm.

Maximum Concentration (Cmax) of Nemtabrutinib in Plasma
Predose, 0.5, 1, 2, 4, 6, 8, 12, 24, 48, 72, 96, 120, 144, 192, 240, and 336 hours postdose

The Cmax of nemtabrutinib in plasma will be determined in each arm.

Area under the Concentration-Time Curve from Time 0 to Infinity (AUC0-Inf) of Digoxin
At designated timepoints (up to approximately 7 days)

Blood samples will be collected to determine the AUC0-Inf of digoxin.

Time of Maximum Plasma Concentration (Tmax) of Nemtabrutinib
At designated time points (up to approximately 10 days postdose)

Blood samples will be collected to determine the Tmax of nemtabrutinib in plasma.

Apparent Volume of Distribution (Vz/F) of Nemtabrutinib
At designated time points (up to approximately 10 days postdose)

Blood samples will be collected to determine the Vz/F of nemtabrutinib in plasma.

Area under the concentration-time curve from time 0 extrapolated to infinity (AUC0-inf) of Nemtabrutinib
Predose and at designated timepoints (up to approximately 2 weeks postdose)

Blood samples will be collected to determine the AUC0-inf of nemtabrutinib in plasma.

Parts 1 and 2: Area Under the Concentration-Time Curve from Time 0 to Infinity (AUC0-Inf) of Nemtabrutinib
At designated time points (up to approximately 2 weeks)

Blood samples will be collected to determine the AUC0-inf of nemtabrutinib.

Parts 1 and 2: Maximum Plasma Concentration (Cmax) of Nemtabrutinib
At designated time points (up to approximately 2 weeks)

Blood samples will be collected to determine the Cmax of nemtabrutinib.

Number of Participants Who Experience Dose Limiting Toxicities (DLTs) Per National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) Version 5.0
Up to approximately 4 weeks

A DLT is ≥1 of: Grade ≥3 nonhematologic toxicity with exception of Grade 3 nausea, vomiting, diarrhea, rash, fatigue, and uncontrolled hypertension lasting \>72 hours despite optimal supportive case; Grade 4 hematologic toxicity lasting \>7 days, Grade 4 platelet count decreased of any duration (with exceptions), or Grade 3 platelet count decreased with bleeding (with exceptions), or Grade 3 or higher febrile neutropenia of any duration; Grade 3 or Grade 4 nonhematologic laboratory abnormality, if results in drug induced liver injury (DILI), or medical intervention is required, or the abnormality leads to hospitalization, or the abnormality persists for \>1 week (with exceptions); missing \>25% of nemtabrutinib doses as a result of drug-related AE(s); Grade 5 toxicity. Toxicities will be graded using NCI-CTCAE version 5.0 except hematologic toxicities in participants with chronic lymphocytic leukemia (CLL) assessed according to the International Workshop on CLL (iwCLL) criteria.

Number of Participants Who Experience Adverse Events (AEs)
Up to approximately 26 months

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.

Number of Participants Discontinuing Study Treatment Due to AEs
Up to approximately 26 months

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.

Maximum Concentration (Cmax) of Nemtabrutinib
Day 1 of Cycles 1 and 2: Pre-dose,1, 2, 4, 6, 8, and 24 hours post-dose; Day 1 of Cycle 3: pre-dose and 2 hours post-dose (up to ~57 days). Each cycle is 28 days

Cmax is the maximum concentration of nemtabrutinib observed in plasma. Blood samples collected at designated timepoints will be used to determine Cmax.

Minimum Concentration (Cmin) of Nemtabrutinib
Day 1 of Cycles 1 and 2: Pre-dose,1, 2, 4, 6, 8, and 24 hours post-dose; Day 1 of Cycle 3: pre-dose and 2 hours post-dose (up to ~57 days). Each cycle is 28 days

Cmin is the minimum concentration of nemtabrutinib observed in plasma. Blood samples collected at designated timepoints will be used to determine Cmin.

Area Under the Plasma Concentration-Time Curve from 0 to 24 Hours (AUC0-24) of Nemtabrutinib
Day 1 of Cycles 1 and 2: Pre-dose,1, 2, 4, 6, 8, and 24 hours post-dose; Day 1 of Cycle 3: pre-dose and 2 hours post-dose (up to ~57 days). Each cycle is 28 days

AUC0-24 is the area under the curve of plasma concentration of nemtabrutinib from time 0 to 24 hours. Blood samples collected at designated timepoints will be used to determine AUC0-24.

Time to Maximum Concentration (Tmax) of Nemtabrutinib
Day 1 of Cycles 1 and 2: Pre-dose,1, 2, 4, 6, 8, and 24 hours post-dose; Day 1 of Cycle 3: pre-dose and 2 hours post-dose (up to ~57 days). Each cycle is 28 days

Tmax is the time to reach maximum concentration of nemtabrutinib. Blood samples collected at designated timepoints will be used to determine Tmax.

Phase 1: Number of Participants Experiencing Dose Limiting Toxicity (DLT)
Cycle 1 (up to 28 days)

DLT is defined by the occurrence of any of the following treatment emergent adverse event (TEAE) unless unequivocally due to the underlying malignancy or an extraneous cause within the first 28 days of study treatment (for dose escalation only) and graded according to National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 4.03. Any Grade 5 TEAE, any Grade 3 nonhematological TEAE except alopecia, nausea, vomiting, diarrhea, and transient Grade 3 laboratory abnormalities which recover within 1 week without intervention, any Grade 3 hematological TEAE that does not recover to Grade 1 or baseline within 7 days with the exception of Grade 3 lymphocytosis, which is considered to be an expected outcome of BTK inhibition, any Grade 4 nonhematological and hematological TEAE, or any other toxicity that in the view of the investigator represents a clinically significant hazard to the participant.

Phase 1: Number of Participants Who Experienced an Adverse Event (AE)
Up to approximately 86 months

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who experienced an AE will be reported.

Phase 1: Number of Participants Who Discontinued Study Treatment Due to an AE
Up to approximately 86 months

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who discontinued study treatment due to an AE will be reported.

Phase 2: Expansion Cohorts A, B & C: Objective Response Rate (ORR) per International Workshop on Chronic Lymphocytic Leukemia (iwCLL) Criteria as Assessed by the Investigator
Up to approximately 64 months

ORR is defined as the percentage of participants achieving a best overall response of complete response (CR), partial response (PR) or partial response with lymphocytosis (PRL). iwCLL criteria as assessed by the investigator. CR is defined as meeting the following criteria: no lymph nodes \>1.5 cm, spleen size \<13 cm, liver normal; no constitutional symptoms, normal lymphocyte count, platelets ≥100 x 10\^9/L; hemoglobin ≥11 g/dL; and normocellular marrow (no CLL cells or B lymphoid nodules). PR is defined as ≥50% decrease in ≥2 of the following: lymph nodes, liver and/or spleen size, lymphocytes PLUS ≥1 of the following met: platelets ≥100 x 10\^9/L or ≥50% increase from screening, hemoglobin \>11 g/dL or ≥50% increase from screening, CLL cells or B lymphoid nodules in marrow.

Phase 2: Expansion Cohorts A, B, C: ORR per Lugano Classification as Assessed by the Investigator
Up to approximately 64 months

ORR is defined as percentage of participants achieving best overall response of CR/PR per Lugano classification as assessed by investigator. CR defined as EITHER CR by imaging (computed tomography \[CT\]): all lymph nodes normal (none ≥15 mm) \& normal liver, spleen OR complete metabolic response (CMR): score of 1, 2 or3 on 5-point scale assessing fluorodeoxyglucose (FDG) metabolic activity in lymphomatous lesions (range: 1=no uptake above background to 5=uptake markedly higher than liver) AND bone marrow (BM) normal by morphology. PR defined as EITHER PR by imaging (CT) with ≥50% decrease in sum of product of diameters \[SPD\] of target lesions, no worsening of nontarget lesions, no new lesions and ≥50% spleen abnormal portion OR Partial Metabolic Response (PMR) with score of 4/5 on FDG 5-point scale (with no new lesions) \& decreased overall uptake AND residual BM abnormalities; OR CR by imaging with residual BM abnormalities; OR PR by imaging without residual BM abnormalities.

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.
Nemtabrutinib + VenetoclaxEXPERIMENTALParticipants will receive nemtrabrutinib oral tablets at specified doses daily starting at Cycle 1 Day 1 (C1D1) and venetoclax oral tablets at doses of 20 mg up to 400 mg daily starting at Cycle 2 Day 1 (C2D1) up to 2 years post C2D1 or until progressive disease (PD) or discontinuation. A cycle = 4 weeks.
Venetoclax + RituximabACTIVE_COMPARATORParticipants will receive venetoclax oral tablets at doses from 20 mg up to 400 mg daily starting at C1D1 on 4-week cycles up to 2 years and rituximab or biosimilar at 375 mg/m\^2 up to 500 mg/m2 intravenous infusion once per 28-day cycle starting at C2D1, for 6 total cycles. Treatment will continue until progressive disease (PD) or discontinuation.
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.
Treatment (nemtabrutinib and venetoclax)EXPERIMENTALPatients receive nemtabrutinib PO daily on days 1-28 of each cycle. Starting in cycle 3, patients also receive venetoclax PO daily on days 1-28 of each cycle. Cycles repeat every 28 days for up to 14 cycles in the absence of disease progression or unacceptable toxicity. Patients undergo CT, bone marrow aspiration and biopsy, and blood sample collection throughout the trial.
Period 1: NemtabrutinibEXPERIMENTALParticipants will receive nemtabrutinib followed by a protocol specified wash-out period.
Period 2: Diltiazem + NemtabrutinibEXPERIMENTALParticipants will receive diltiazem plus nemtabrutinib.
Panel AEXPERIMENTALParticipants with moderate hepatic impairment will receive a single oral dose of 25 mg nemtabrutinib on Day 1.
Panel BEXPERIMENTALHealthy control participants will receive a single oral dose of 25 mg nemtabrutinib on Day 1.
DigoxinEXPERIMENTALParticipants receive a single oral dose of digoxin (Treatment A).
Digoxin + NemtabrutinibEXPERIMENTALParticipants receive a single oral dose of digoxin coadministered with a single oral dose of nemtabrutinib (Treatment B).
Period 2: Nemtabrutinib + ItraconazoleEXPERIMENTALParticipants receive oral doses of itraconazole once daily on Days 1 to 13 with a single oral dose of nemtabrutinib given with itraconazole on Day 4.
Nemtabrutinib Treatment AEXPERIMENTALParticipants receive a single dose of nemtabrutinib on Day 1 under fasted conditions (on an empty stomach after a 10-hour overnight fast)
Nemtabrutinib Treatment BEXPERIMENTALParticipants receive a single dose of nemtabrutinib on Day 1 under fed conditions (after a high-fat meal)
Nemtabrutinib Form AEXPERIMENTALParticipants receive nemtabrutinib form A orally.
Nemtabrutinib Form BEXPERIMENTALParticipants receive nemtabrutinib form B orally.
Nemtabrutinib Form CEXPERIMENTALParticipants receive nemtabrutinib form C orally.
Period 2: Nemtabrutinib + EfavirenzEXPERIMENTALParticipants receive oral doses of efavirenz once daily on Days 1 to 24 with a single oral dose of nemtabrutinib given with efavirenz on Day 11.
Phase 1: Dose Escalation and Determination of RP2DEXPERIMENTALPhase I: Dose Escalation and determination of RP2D, multiple dose levels of nemtabrutinib to be evaluated (Up to approximately 22 months).
Phase 2: Expansion Cohort AEXPERIMENTALRelapsed/Refractory chronic lymphocytic leukemia/small lymphocytic lymphoma (R/R CLL/SLL) participants with at least 2 prior systemic therapies and previously treated with a covalent Bruton's tyrosine kinase inhibitor (BTKi) who must have a documented BTK mutation on C481 residue receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until progressive disease (PD), unacceptable adverse events (AEs), or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Cohort BEXPERIMENTALR/R CLL/SLL participants who have failed or were intolerant to a BTKi with documentation of the absence of BTK mutation on C481 residue receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Cohort CEXPERIMENTALRichter's transformation (RT) participants who have failed at least one prior therapy receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Cohort DEXPERIMENTALFollicular Lymphoma (FL) participants who have failed at least 2 prior systemic therapies and are histology grade 1, 2, or 3A receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Cohort EEXPERIMENTALMantle Cell Lymphoma (MCL) participants who have failed at least 2 prior systemic therapies receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Cohort FEXPERIMENTALMarginal Zone Lymphoma (MZL) participants who have failed at least 2 prior systemic therapies receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Cohort GEXPERIMENTALHigh-grade B-cell lymphoma (BCL) participants who have failed at least 2 prior systemic therapies and have known MYC and BCL2 and/or BCL6 translocations confirmed by flourescence in situ hybridization (FISH) or overexpression by immunohistochemistry (IHC) receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Cohort HEXPERIMENTALWaldenström macroglobulinemia (WM) participants who have failed at least 2 prior systemic therapies receive up to 65 mg of nemtabrutinib per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Phase 2: Expansion Food Effect Cohort IEXPERIMENTALB-cell Non-Hodgkin's lymphoma (NHL), CLL/SLL and WM participants receive up to 65 mg of nemtabrutinib fasted (1 hour prior to or 2 hours after meal) and non-fasted per day orally in each cycle (Cycle length = 28 days) until PD, unacceptable AEs, or discontinuation at investigator's discretion (up to approximately 64 months).
Interventions
NameTypeDescription
NemtabrutinibDRUGAdministered orally
IbrutinibDRUGAdministered orally
AcalabrutinibDRUGAdministered orally
VenetoclaxDRUG10, 50, and 100 mg tablets
RituximabBIOLOGICAL100 mg/10 mL, 500 mg/50 mL (10 mg/mL) IV Infusion
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.
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.
Biospecimen CollectionPROCEDUREUndergo blood sample collection
Bone Marrow AspirationPROCEDUREUndergo bone marrow aspiration and biopsy
Bone Marrow BiopsyPROCEDUREUndergo bone marrow aspiration and biopsy
Computed TomographyPROCEDUREUndergo CT
Questionnaire AdministrationOTHERAncillary studies
DiltiazemDRUGOral administration
DigoxinDRUGOral administration
ItraconazoleDRUGOral administration
EfavirenzDRUGOral administration
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Eligibility Criteria
Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites200

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...

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