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Fianlimab

Phase 3

Melanoma | Small molecule | Oncology |Regeneron Pharmaceuticals, Inc.|Last Updated: May 6, 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
RandomizedDouble-BlindACTIVE_CONTROLLEDDMCBiomarker
Total Trials4
Total Enrollment3,718
FDA Designations
No designations recorded
Clinical Trials (4)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06246916A Study With Combinations of Anti-LAG-3 and Anti-PD-1 Antibodies in Adult Participants With Advanced or Metastatic Melanoma (Harmony Head-to-Head)PHASE3 RECRUITING 560Sep 9, 2024Jul 10, 2033May 6, 2026109 United States, Canada
NCT05608291A Trial to See if the Combination of Fianlimab With Cemiplimab Works Better Than Pembrolizumab for Preventing or Delaying Melanoma From Coming Back After it Has Been Removed With SurgeryPHASE3 ACTIVE NOT_RECRUITING 1,564Jan 16, 2023Feb 15, 2030May 13, 2025211 United States, Argentina +20
NCT05352672Clinical Study of Fianlimab in Combination With Cemiplimab Versus Pembrolizumab in Adolescent and Adult Patients With Previously Untreated Unresectable Locally Advanced or Metastatic MelanomaPHASE3 ACTIVE NOT_RECRUITING 1,546Jul 14, 2022Sep 16, 2031Apr 22, 2026210 United States, Argentina +22
NCT06848088A Study to Learn About the Long-Term Health of Adult Participants From a Previous Study of a New Melanoma TreatmentPHASE2 ENROLLING BY_INVITATION 48Apr 14, 2025Oct 10, 2029Jan 12, 20268 United States, Ireland
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Study Endpoints
Primary Endpoints
Objective response rate (ORR) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 based on blinded independent central review (BICR)
Up to 72 months
Relapse free survival (RSF)
Up to 5 Years

Time from randomization to the first documented recurrence of disease at any site (excluding new primary melanomas) or death from any cause, whichever occurs first.

Progression-free survival (PFS)
Approximately 27 months

Per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 based on Blinded Independent Central Review (BICR)

Death from any cause starting at time of initial treatment with fianlimab and cemiplimab in study R3767-ONC-1613
Up to 4 years
Secondary Endpoints
Progression free survival (PFS) RECIST version 1.1 based on BICR
Up to 72 months
Death from any cause
Up to 72 months
Overall survival (OS)
Up to 72 months
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
fianlimab+cemiplimabEXPERIMENTALRandomized 1:1
relatlimab+nivolumabACTIVE_COMPARATORRandomized 1:1
Fianlimab HD + CemiplimabEXPERIMENTALPatients will be administered one combination dose of fianlimab high dose (HD) and cemiplimab
Fianlimab LD + CemiplimabEXPERIMENTALPatients will be administered one combination dose of fianlimab low dose (LD) and cemiplimab
PembrolizumabACTIVE_COMPARATORPatients will be administered one dose of pembrolizumab co-infused with saline/dextrose placebo
A: fianlimab+cemiplimab dose 1EXPERIMENTALAs defined in Protocol Amendment 5
A1: fianlimab+cemiplimab dose 2EXPERIMENTALAs defined in Protocol Amendment 5
B: pembrolizumab+placeboEXPERIMENTALAs defined in Protocol Amendment 5
C: cemiplimab+placeboEXPERIMENTALAs defined in Protocol Amendment 5
With Disease Progression at EnrollmentOTHER -
No Progressive Disease at EnrollmentOTHER -
Interventions
NameTypeDescription
fianlimabDRUGIntravenous (IV) administration every 3 weeks (Q3W) in combination with cemiplimab
cemiplimabDRUGIV administration Q3W in combination with fianlimab
relatlimab+nivolumabDRUGIV administration every 4 weeks (Q4W)
PembrolizumabDRUGPembrolizumab will be administered by IV infusion Q 3 weeks
PlaceboDRUGMatching placebo co-infused with pembrolizumab IV, will be administered by IV infusion Q 3 weeks
Fianlimab+cemiplimabDRUGNo study drug administered in this observational study.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites109

Key Inclusion Criteria: 1. Participants with histologically confirmed unresectable stage III and stage IV (metastatic) melanoma per American Joint Committee on Cancer (AJCC), eighth revised edition. 2. Participants must not have received prior systemic therapy for unresectable or metastatic melanom...

Countries:United StatesCanadaArgentinaAustraliaBelgiumBrazilChileCzechiaFranceGeorgiaGermanyGreeceIrelandIsraelItalyMexicoPolandRomaniaSouth AfricaSpainTurkey (Türkiye)United KingdomAustriaHungaryNetherlandsPeru
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Competitive Landscape -Melanoma 127 trials
CompanyTickerTrialsLead PhaseDrugs
Merck & Co., Inc.MRK6PHASE3Intismeran autogene, Pembrolizumab, pembrolizumab, Pembrolizumab Berahyaluronidase alfa
Bristol-Myers Squibb CompanyBMY7PHASE3Nivolumab, Nivolumab + Relatlimab, rHuPH20, Relatlimab, relatlimab+nivolumab
Regeneron Pharmaceuticals, Inc.REGN8PHASE3Fianlimab, Cemiplimab, Pembrolizumab, fianlimab, cemiplimab
Pfizer Inc.PFE4PHASE3Encorafenib, Binimetinib, Pembrolizumab, PF-08046049, PF-07799933
IDEAYA Biosciences, Inc.IDYA4PHASE3Darovasertib, IDE196, Crizotinib, Pembrolizumab, Ipilimumab
Iovance Biotherapeutics IncIOVA6PHASE3Lifileucel plus Pembrolizumab, Pembrolizumab with Optional Crossover Period, Lifileucel, LN-145/LN-144, Cyclophosphamide
Replimune Group, Inc.REPL5PHASE3Vusolimogene Oderparepvec, Nivolumab, Pembrolizumab, Single-agent chemotherapy, RP1
Amgen Inc.AMGN1PHASE3ABP 206, Nivolumab
Immunocore Holdings Plc Shs Sponsored American Depositary Shares Repr 1 ShIMCR3PHASE3Tebentafusp, Brenetafusp, Nivolumab
Immatics N.V.IMTX2PHASE3IMA203, nivolumab plus relatlimab, lifileucel, pembrolizumab, ipilimumab
Aura Biosciences IncAURA4PHASE3Bel-sar
Novartis AG Sponsored ADRNVS6PHASE2LXH254, LTT462, Trametinib, Ribociclib, DYP688
IO Biotech, Inc.IOBT2PHASE3IO102-IO103, Pembrolizumab, Pembrolizumab KEYTRUDA
Erasca, Inc.ERAS1PHASE3Naporafenib, Dacarbazine, Temozolomide, Trametinib
AstraZeneca PLCAZN3PHASE2Ceralasertib, Durvalumab, AZD6750, rilvegostomig, Trastuzumab deruxtecan
Eikon Therapeutics, Inc.EIKN2PHASE2EIK1001, Pembrolizumab, Association atezolizumab + BDB001 + RT
Moderna, Inc.MRNA1PHASE2mRNA-4157, Pembrolizumab
Genmab A/S Sponsored ADRGMAB2PHASE2Acasunlimab, Pembrolizumab, GEN1042, Cisplatin, Carboplatin
Agenus Inc.AGEN1PHASE2Botensilimab, Balstilimab
ImmunityBio IncIBRX1PHASE2N-803 + Pembrolizumab
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06246916primaryCompletionDate: changed
LOWMay 26, 2026NCT06848088primaryCompletionDate: changed
LOWMay 26, 2026NCT05352672primaryCompletionDate: changed
LOWMay 26, 2026NCT05608291primaryCompletionDate: changed
LOWMay 24, 2026NCT06246916studyFirstPostDate: changed
LOWMay 24, 2026NCT06848088studyFirstPostDate: changed
LOWMay 24, 2026NCT05608291studyFirstPostDate: changed
LOWMay 24, 2026NCT05352672studyFirstPostDate: changed