Recent Updates
Recently added Catalysts

DB-1303/BNT323

Phase 3

HER2-positive Breast Cancer | Small molecule | Oncology |BioNTech SE|Last Updated: Oct 20, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedCONTROLLEDBiomarker
Total Trials1
Total Enrollment228
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06265428A Study to Compare DB-1303/BNT323 Versus T-DM1 in Breast CancerPHASE3 ACTIVE NOT_RECRUITING 228Jan 29, 2024Feb 1, 2026Oct 20, 202548 China
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Progression Free Survival (PFS) by Blinded Independent Central Review (BICR) assessment per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1)
Up to approximately 24 months.

Defined as the time from randomization to the first documented disease progression per RECIST 1.1 as assessed by BICR or death due to any cause, whichever occurs first

Secondary Endpoints
Overall Survival (OS)
Up to approximately 24 months.
Progression Free Survival (PFS) by Investigator assessment per RECIST 1.1
Up to approximately 24 months.
Objective response rate (ORR) by BICR and investigator assessment per RECIST 1.1
Up to approximately 24 months.
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
DB-1303/BNT323EXPERIMENTALEnrolled patients will receive DB-1303/BNT323 by intravenous (I.V.) infusion
T-DM1EXPERIMENTALEnrolled patients will receive T-DM1 by I.V. infusion
Interventions
NameTypeDescription
DB-1303/BNT323DRUGAdministered I.V.
T-DM1DRUGAdministered I.V.
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites48

Inclusion Criteria: * Male or female adults ≥ 18 years at the time of voluntary signing of informed consent. * Pathologically confirmed unresectable or metastatic HER2 positive breast cancer previously treated with trastuzumab and taxane * Eastern Cooperative Oncology Group (ECOG) performance statu...

Countries:China
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06265428primaryCompletionDate: changed
LOWMay 24, 2026NCT06265428studyFirstPostDate: changed