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BNT329

Phase 1

Advanced Solid Cancers | Small molecule | Oncology |BioNTech SE|Last Updated: Aug 27, 2026

Target and mechanism

Molecular targetCA19-9
Target classAntigen
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment245

FDA Designations

No designations recorded

Clinical trial landscape

BNT329 · 1 trial · 1 indication

Phase 1 1
NCT07186842A Clinical Trial to Test if the Investigational Drug BNT329 is Safe and Potentially Beneficial for People With Advanced Solid Tumors Known to Express the Tumor Marker CA19-9Advanced Solid Cancers
RECRUITING245 Analytics
PHASE1RECRUITING
A Clinical Trial to Test if the Investigational Drug BNT329 is Safe and Potentially Beneficial for People With Advanced Solid Tumors Known to Express the Tumor Marker CA19-9
Advanced Solid CancersUnlock trial analytics

Study Endpoints

Primary Endpoints

Parts A and B - Occurrence of dose-limiting toxicities within a participant
First 21 days (Part A) or 28 days (Part B) after the first dose of BNT329.

Per dose level.

Parts A, B, and D - Occurrence of treatment-emergent adverse events (TEAEs), Grade ≥3 TEAEs, serious adverse events (SAEs), treatment-related TEAEs, treatment-related Grade ≥3 TEAEs, and treatment-related SAEs
From first dose of BNT329 until 60 days after the last dose of BNT329 (up to 26 months).

Per dose level.

Parts A, B, and D - Occurrence of dose interruptions, reductions, and discontinuation of BNT329 due to TEAEs
From the time of initiation of the first dose of BNT329 until 60 days after the last dose of BNT329 (up to 26 months).

Per dose level.

Part D - Objective response rate (ORR)
From first dose of BNT329 until end of study (up to approximately 36 months).

Per dose level. Defined as the proportion of participants in whom a confirmed complete response (CR) or partial response (PR) (based on the investigator's assessment) is observed as best overall response.

Secondary Endpoints

Parts A, B, and D - Assessment of area under the curve derived from serum/plasma concentrations of CA19-9-unbound ADC, CA19-9-unbound total anti-CA19-9 antibody, and unconjugated YL0010014 payload
First 21 days (Part A) or 28 days (Part B) after the first dose of BNT329.
Parts A, B, and D - Assessment of maximum concentration derived from serum/plasma concentrations of CA19-9-unbound ADC, CA19-9-unbound total anti-CA19-9 antibody, and unconjugated YL0010014 payload
First 21 days (Part A) or 28 days (Part B) after the first dose of BNT329.
Parts A, B, and D - Assessment of time to reach maximum concentration derived from serum/plasma concentrations of CA19-9-unbound ADC, CA19-9-unbound total anti-CA19-9 antibody, and unconjugated YL0010014 payload
First 21 days (Part A) or 28 days (Part B) after the first dose of BNT329.
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose Escalation - Part AEXPERIMENTALBNT329 administered once every 3 weeks at protocol-defined dose levels
Dose Escalation - Part BEXPERIMENTALBNT329 administered once every 2 weeks at protocol-defined dose levels
Dose Escalation: Part CEXPERIMENTALBNT329 administered after pre-dosing with a CA19-9 targeting monoclonal antibody
Dose Expansion - Part DEXPERIMENTALParticipants will be randomized to one of two arms evaluating two different doses as selected from Parts A, B, and/or C

Interventions

NameTypeDescription
BNT329DRUGIntravenous (IV) infusion
CA19-9-targeting monoclonal antibodyDRUGMonoclonal antibody
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites17

Key Inclusion Criteria All participants and parts: * Have an Eastern Cooperative Oncology Group performance score of 0 to 1 * Have measurable disease per RECIST v1.1, except for ovarian cancer where participants will be evaluated according to Gynecologic Cancer InterGroup criteria. * Have a life e...

Countries:United StatesAustraliaGermanySpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWAug 27, 2026NCT07186842lastUpdatePostDate: changed
LOWAug 27, 2026NCT07186842lastUpdatePostDate: changed
LOWJul 17, 2026NCT07186842lastUpdatePostDate: changed
LOWJul 17, 2026NCT07186842lastUpdatePostDate: changed

Frequently asked questions about BNT329

What is BNT329 used for?

BNT329 is an investigational small molecule being developed for the treatment of advanced solid cancers. It is designed for patients whose tumors express the tumor marker CA19-9. The drug is currently being evaluated in a Phase 1 clinical trial to assess its safety and potential benefit in this patient population.

What does BNT329 target?

BNT329 targets CA19-9, a tumor-associated antigen that is expressed on the surface of certain cancer cells. By targeting this antigen, the drug aims to selectively attack tumors that carry the CA19-9 marker, potentially offering a treatment option for patients with advanced solid cancers that express this antigen.

Who makes BNT329?

BNT329 is being developed by BioNTech SE, a biotechnology company publicly traded under the ticker symbol BNTX. BioNTech is conducting clinical research on this investigational drug to evaluate its safety and efficacy in patients with advanced solid cancers.

What phase is BNT329 in?

BNT329 is currently in Phase 1 clinical development. It is an investigational drug that has not yet been approved by regulatory authorities. The ongoing Phase 1 trial is designed to evaluate the safety, tolerability, and potential clinical benefit of BNT329 in patients with advanced solid tumors expressing CA19-9.

What clinical trials is BNT329 in?

BNT329 is being studied in a Phase 1 clinical trial with the identifier NCT07186842. This trial is currently recruiting participants and aims to enroll approximately 245 patients with advanced solid cancers. The study is being conducted at sites in the United States, Australia, Germany, Spain, and the United Kingdom.