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GEN1042

Phase 1/2

Malignant Solid Tumor | Monoclonal antibody | Oncology |Genmab A/S|Trials Updated: Oct 6, 2026

GEN1042 development status

Highest phase Phase 1/2 (NCT05491317)
Phase scored for GMABPhase 1
Registered trials 3 across 1 sponsor since Sep 2019

GEN1042 target and mechanism

Molecular targetCD40 and 4-1BB
Target classBispecific Antibody
ModalityMonoclonal antibody

Also known as GEN1042 (DuoBody®-CD40x4-1BB)

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials2
Total Enrollment358

FDA Designations

No designations recorded

GEN1042 clinical trials

GEN1042 · 2 trials · 6 indications

Phase 1 2
NCT06057038A Safety Trial of GEN1042 in Japanese Subjects With Malignant Solid TumorsMalignant Solid Tumor
ACTIVE NOT_RECRUITING8 Analytics
NCT04083599GEN1042 Safety Trial and Anti-tumor Activity in Participants With Malignant Solid TumorsMalignant Solid Tumor
ACTIVE NOT_RECRUITING350 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Safety Trial of GEN1042 in Japanese Subjects With Malignant Solid Tumors
Malignant Solid TumorUnlock trial analytics
PHASE1ACTIVE NOT_RECRUITING
GEN1042 Safety Trial and Anti-tumor Activity in Participants With Malignant Solid Tumors
Malignant Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants with Dose Limiting Toxicities (DLTs)
During the first cycle (Cycle length = 21 days)

Toxicities will be graded for severity according to the National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE), version (v) 5.0.

Percentage of Participants with Adverse Events (AEs)
From first dose until the end of the treatment (approximately 3 years)

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

Dose Escalation and Safety Run-in Parts: Number of Participants With Dose-Limiting Toxicities (DLTs)
First Cycle (21 days)

Toxicities will be graded for severity according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) criteria version 5.0

Dose Expansion: Objective Response Rate (ORR)
Up to approximately 2 years and 4 months

ORR is defined as the percentage of participants with best overall response (BOR) \[complete or partial response (PR or CR)\] based on Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 as assessed by the investigator.

Secondary Endpoints

Maximum (Peak) Plasma Concentration (Cmax) of GEN1042
Predose and postdose at multiple timepoints up to end of treatment (approximately 3 years)
Area Under the Concentration-time Curve (AUC) From Time Zero to Last Quantifiable Sample (AUClast) of GEN1042
Predose and postdose at multiple timepoints up to end of treatment (approximately 3 years)
Time to Reach Cmax (Tmax) of GEN1042
Predose and postdose at multiple timepoints up to end of treatment (approximately 3 years)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Monotherapy (non-CNS Malignant Solid Tumors): GEN1042EXPERIMENTAL -
Combination Therapy Cohort 1 [HNSCC]: GEN1042+Pembro+ChemotherapyEXPERIMENTAL -
Combination Therapy Cohort 2 [HNSCC and NSCLC]: GEN1042+PembroEXPERIMENTAL -
Combination Therapy Cohort 3 [HNSCC]: GEN1042+Pembro+ChemotherapyEXPERIMENTAL -
Combination Therapy Cohort 4 [HNSCC and NSCLC]: GEN1042+PembroEXPERIMENTAL -
Monotherapy - Dose Escalation and Dose Expansion PartsEXPERIMENTAL -
Combination Therapy - Safety Run-in and Expansion PartsEXPERIMENTAL -

Interventions

NameTypeDescription
GEN1042BIOLOGICALIntravenous
PembrolizumabDRUGIntravenous
CisplatinDRUGIntravenous
CarboplatinDRUGIntravenous
5-FluorouracilDRUGIntravenous
5-FUDRUGIntravenous
GemcitabineDRUGIntravenous
Nab paclitaxelDRUGIntravenous
PemetrexedDRUGIntravenous
PaclitaxelDRUGIntravenous
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites3

Key Inclusion Criteria: 1. Must have measurable disease according to RECIST v1.1. 2. Eastern Cooperative Oncology Group (ECOG) performance status score of 0-1. 3. Acceptable organ and bone marrow function. 4. Participant must have a life expectancy of at least 3 months. Key Exclusion Criteria: 1....

Countries:JapanUnited StatesDenmarkFranceGeorgiaGermanyIsraelItalyMoldovaSouth KoreaSpainTaiwanUnited Kingdom
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Recent Changes (Last 90 Days)

LOWOct 6, 2026NCT06057038lastUpdatePostDate: changed
LOWOct 6, 2026NCT06057038lastUpdatePostDate: changed
LOWSep 10, 2026NCT06057038lastUpdatePostDate: changed
LOWSep 10, 2026NCT06057038lastUpdatePostDate: changed
LOWAug 4, 2026NCT04083599lastUpdatePostDate: changed
LOWAug 4, 2026NCT06057038lastUpdatePostDate: changed
LOWAug 4, 2026NCT04083599lastUpdatePostDate: changed
LOWAug 4, 2026NCT06057038lastUpdatePostDate: changed

Frequently asked questions about GEN1042

What is GEN1042 used for?

GEN1042 is an investigational bispecific monoclonal antibody being studied for the treatment of malignant solid tumors. It is in Phase 1 clinical development for oncology indications, including non-small cell lung cancer, colorectal cancer, melanoma, head and neck squamous cell carcinoma, and pancreatic ductal adenocarcinoma.

What does GEN1042 target?

GEN1042 targets CD40 and 4-1BB, which are immune cell receptors. As a bispecific antibody, it is designed to engage both targets simultaneously, potentially modulating immune responses against tumors. This mechanism is under investigation in early-stage clinical trials for solid tumors.

Who is developing GEN1042?

GEN1042 is being developed by Genmab A/S, a biotechnology company listed on the Nasdaq under the ticker GMAB. The company is conducting Phase 1 clinical trials to evaluate the safety and anti-tumor activity of GEN1042 in patients with malignant solid tumors.

What phase is GEN1042 in?

GEN1042 is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Two Phase 1 trials are currently active, though not recruiting participants, to assess its safety and preliminary efficacy in solid tumor patients.

What clinical trials is GEN1042 in?

GEN1042 is being studied in two Phase 1 trials. NCT04083599 is a safety and anti-tumor activity trial enrolling 350 participants with various solid tumors across multiple countries. NCT06057038 is a safety trial enrolling 8 Japanese participants with malignant solid tumors.

Is GEN1042 the same as other names?

GEN1042 is the primary name used in clinical trials and development. No alternative names have been reported for this investigational bispecific antibody. It is distinct from other Genmab pipeline assets and is specifically being evaluated for solid tumor indications.