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Obrixtamig

Phase 1

Extensive-stage Small Cell Lung Carcinoma | Small molecule | Oncology |BioNTech SE|Last Updated: Sep 30, 2026

Development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Jul 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment55

FDA Designations

No designations recorded

Clinical trial landscape

Obrixtamig · 1 trial · 2 indications

Phase 1 1
NCT07843940A Study to Test Obrixtamig in Combination With Pumitamig in People With Advanced Small Cell Lung Cancer (Dareon®-Rosetta35)Extensive-stage Small Cell Lung Carcinoma
NOT YET_RECRUITING55 Analytics
PHASE1NOT YET_RECRUITING
A Study to Test Obrixtamig in Combination With Pumitamig in People With Advanced Small Cell Lung Cancer (Dareon®-Rosetta35)
Extensive-stage Small Cell Lung CarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Occurrence of treatment-emergent adverse events (AEs) leading to trial medication discontinuation or dose modification
up to 27 months

Secondary Endpoints

Occurrence of dose-limiting toxicities (DLTs) during the DLT evaluation period
up to 27 months
Occurrence of treatment-emergent DLTs
up to 27 months
Occurrence of treatment-emergent adverse events of special interest (AESIs)
up to 27 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort 1EXPERIMENTALCombination of obrixtamig and pumitamig in patients with extensive stage small cell lung carcinoma (ES-SCLC) who progressed on or after a platinum-containing first line (1L) treatment or on or after one additional line of therapy (second line (2L) or third line (3L) patients).
Cohort 2EXPERIMENTALCombination of obrixtamig, pumitamig and chemotherapy (i.e., carboplatin and etoposide) in 1L ES-SCLC patients.

Interventions

NameTypeDescription
ObrixtamigDRUGObrixtamig
PumitamigDRUGPumitamig
CarboplatinDRUGCarboplatin
EtoposideDRUGEtoposide
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites27

Inclusion criteria: 1. Signed and dated written informed consent in accordance with ICH-GCP and local legislation prior to any trial-specific procedures, sampling, or analyses. 2. Male or female participants ≥18 years old and at least at the legal age of consent in countries where it is greater tha...

Countries:United StatesAustraliaBelgiumChinaFranceGermanyJapanNetherlandsPolandSpain
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Recent Changes (Last 90 Days)

LOWSep 30, 2026NCT07843940startDate: changed
LOWSep 30, 2026NCT07843940startDate: changed
LOWSep 28, 2026NCT07843940NEW_TRIAL: changed
LOWSep 28, 2026NCT07843940NEW_TRIAL: changed

Frequently asked questions about Obrixtamig

What is Obrixtamig?

Obrixtamig is an investigational small molecule therapeutic being developed by BioNTech SE for extensive-stage small cell lung carcinoma and advanced small cell lung cancer. It is currently in Phase 1 clinical development and is being studied in combination with another agent called pumitamig.

What is Obrixtamig used for in small cell lung cancer?

Obrixtamig is being evaluated for the treatment of extensive-stage small cell lung carcinoma and advanced small cell lung cancer. It is not yet approved for any indication and remains an investigational therapy in Phase 1 testing. The clinical program enrolls adults aged 18 years and older.

Who makes Obrixtamig?

Obrixtamig is developed by BioNTech SE, which trades under the ticker BNTX. BioNTech is sponsoring the Phase 1 clinical program evaluating the agent in advanced small cell lung cancer, including the Dareon-Rosetta35 study.

What phase is Obrixtamig in?

Obrixtamig is in Phase 1 clinical development. It is an investigational agent and has not been approved by the FDA or any other regulatory authority. One Phase 1 trial is currently active, and no trials have been completed to date.

What clinical trials is Obrixtamig in?

Obrixtamig is being studied in the Phase 1 Dareon-Rosetta35 trial, registered as NCT07843940. The study evaluates obrixtamig in combination with pumitamig in people with advanced small cell lung cancer, plans to enroll 55 participants, and is not yet recruiting. Trial sites span the United States, Australia, Belgium, China, France, Germany, Japan, the Netherlands, Poland, and Spain.