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IMCgp100

Phase 2

Uveal Melanoma | Small molecule | Oncology |Immunocore Holdings plc|Last Updated: Mar 17, 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 Trials2
Total Enrollment524
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03070392Safety and Efficacy of IMCgp100 Versus Investigator Choice in Advanced Uveal MelanomaPHASE2 COMPLETED 378Oct 16, 2017Sep 17, 2025Mar 17, 202657 United States, Australia +12
NCT02570308A Study of the Intra-Patient Escalation Dosing Regimen With IMCgp100 in Patients With Advanced Uveal MelanomaPHASE1 COMPLETED 146Feb 29, 2016Oct 17, 2022Mar 21, 202326 United States, Canada +3
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Study Endpoints
Primary Endpoints
Efficacy: Overall Survival
From randomization to the data cut off date of 13-Oct-2020; median follow-up duration was 14.1 months.

Overall survival is defined as the time from randomization to date of death due to any cause.

Number of Participants With a Dose Limiting Toxicity (DLT) in Phase 1
Up to 49 months

Number of participants with a dose limiting toxicity, defined as an adverse event (AE) or abnormal laboratory value assessed as having a suspected relationship to study drug, and unrelated to disease, disease progression, inter-current illness, or concomitant medications that occurs within the first cycle of treatment and meets any of the pre-specified criteria.

Objective Response Rate in Phase 2
Up to 38 months

Objective response rate (ORR) is defined as the percentage of participants with measurable disease with at least 1 visit response of complete response (CR) or partial response (PR) that is confirmed at least 4 weeks later, as defined in RECIST v.1.1 and assessed by an independent central review (ICR). The denominator in the calculation of the ORR is the number of participants in the full analysis set with measurable disease at baseline.

Secondary Endpoints
Safety: Number of Participants With Treatment Emergent Adverse Events
Safety was assessed from informed consent through 90 days after end of treatment, up to 36 months.
Efficacy: Progression Free Survival (PFS)
PFS was assessed every 3 months from randomization until disease progression or death, up to 36 months.
Quality-of-Life: Change From Baseline in EQ-5D,5L Domain Scores
EQ-5D,5L was assessed at baseline (Cycle 1 Day 1) and on Day 1 of every other cycle to Cycle 5 Day 1, every fourth cycle thereafter, beginning with Cycle 9 Day 1 and End of Treatment (EOT), up to 36 months. Each cycle is 21 days.
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
IMCgp100 (tebentafusp, Kimmtrak)EXPERIMENTALBiologic:IMCgp100 (Soluble gp 100-specific T cell receptor with anti - CD3 scFV: IMCgp100)
Investigator's ChoiceACTIVE_COMPARATOR1 of 3 Investigator's Choice options: Systemic Dacarbazine 1 of 3 Investigator's Choice options: Systemic Ipilimumab 1 of 3 Investigator's Choice options: Systemic Pembrolizumab
Dose escalationEXPERIMENTALDose escalation cohorts of the intra-patient escalation regimen.
Dose expansionEXPERIMENTALDose expansion cohort with the recommended phase 2 dose of the intra-patient dose escalation regimen.
Interventions
NameTypeDescription
IMCgp100BIOLOGICALIMCgp100 is to be administered at 20 mcg cycle 1 day1, then 30 mcg cycle 1 day 8, then 68 mcg cycle 1 day 15 and weekly thereafter by IV infusion over 15 minutes until confirmed disease progression or unacceptable toxicity
DacarbazineDRUGDacarbazine is to be administered at 1,000 mg/m2 of body surface area IV infusion every 3 weeks until disease progression or unacceptable toxicity
IpilimumabBIOLOGICALIpilimumab is to be administered at 3 mg/kg IV infusion over 90 minutes every 3 weeks for a total of 4 treatments
PembrolizumabBIOLOGICALPembrolizumab is to be administered at 2 mg/kg IV infusion up to a maximum of 200 mg administered Intravenously over 30 minutes every 3 weeks or 200 mg fixed dose administered intravenously every 3 weeks where approved locally until confirmed disease progression or unacceptable toxicity
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Eligibility Criteria
Age Range18 Years — 99 Years
SexALL
Healthy VolunteersNo
Study Sites57

Inclusion Criteria 1. Male or female participants age ≥ 18 years of age at the time of informed consent 2. Ability to provide and understand written informed consent prior to any study procedures 3. Histologically or cytologically confirmed metastatic UM 4. Must meet the following criteria related ...

Countries:United StatesAustraliaBelgiumCanadaFranceGermanyItalyNetherlandsPolandRussiaSpainSwitzerlandUkraineUnited Kingdom
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