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BGB-26808

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |BeOne Medicines Ltd.|Last Updated: Jun 3, 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 Trials1
Total Enrollment217
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05981703A Study Investigating BGB-26808 Alone or in Combination With Tislelizumab in Participants With Advanced Solid TumorsPHASE1 RECRUITING 217Sep 21, 2023Sep 30, 2027Jun 3, 202628 United States, Australia +2
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Study Endpoints
Primary Endpoints
Phase 1a: Number of Participants with Adverse Events (AEs) and Serious Adverse Events (SAEs)
From the first dose of study drug(s) to 90 days after the last dose or initiation of a new anticancer therapy, whichever occurs first; up to approximately 12 months

Number of participants with AEs and SAEs, including findings from physical examinations, electrocardiograms (ECGs), laboratory assessments, and that meet protocol-defined dose-limiting toxicity criteria.

Phase 1a: Maximum Tolerated Dose (MTD) or Maximum Administered Dose (MAD) of BGB-26808
Approximately 1 month

MTD is defined as the highest dose evaluated for which estimated toxicity rate is the closest to the target toxicity rate. MAD is defined as the highest dose administered if MTD is not reached.

Phase 1a: Recommended Dose for Expansion (RDFE) of BGB-26808
Approximately 1 month

RDFE of BGB-26808 alone or in combination with tislelizumab will be determined based upon the MTD or MAD.

Phase 1b: Overall Response Rate (ORR)
Approximately 6 months

ORR is defined as the percentage of participants who had confirmed complete response (CR) or partial response (PR) assessed by the investigator using Response Evaluation Criteria in Solid Tumors (RECIST) v1.1.

Secondary Endpoints
Phase 1a: ORR
Approximately 6 months
Phase 1a and 1b: Duration of Response (DOR)
Approximately 9 months
Phase 1a and 1b: Disease Control Rate (DCR)
Approximately 6 months
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Phase 1a: Dose EscalationEXPERIMENTALSequential cohorts of increasing dose levels of BGB-26808 will be evaluated as monotherapy and in combination with tislelizumab.
Phase 1b: Dose ExpansionEXPERIMENTALRecommended doses for expansion (RDFEs) for BGB-26808 from Phase 1a in combination with tislelizumab plus chemotherapy will be evaluated.
Interventions
NameTypeDescription
BGB-26808DRUGPlanned doses administered orally as a tablet daily.
TislelizumabDRUGPlanned doses administered by intravenous infusion.
ChemotherapyDRUGAdministered in accordance with relevant local guidelines and/or prescribing information.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites28

Inclusion Criteria: 1. Able to provide a signed and dated written informed consent prior to any study-specific procedures, sampling, or data collection. 2. Eastern Cooperative Oncology Group (ECOG) Performance Status ≤ 1. 3. Phase 1a: Participants with histologically or cytologically confirmed adva...

Countries:United StatesAustraliaChinaNew Zealand
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Recent Changes (Last 90 Days)
LOWJun 3, 2026NCT05981703lastUpdatePostDate: changed
LOWJun 3, 2026NCT05981703lastUpdatePostDate: changed
LOWMay 26, 2026NCT05981703primaryCompletionDate: changed
LOWMay 24, 2026NCT05981703studyFirstPostDate: changed