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ZL-1109

Phase 3

Thyroid Eye Disease (TED) | Small molecule | Endocrine |Zai Lab Limited|Last Updated: Dec 29, 2025

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-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment99
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07211776A Study to Assess the Efficacy and Safety of ZL-1109 in Chinese Participants With Active Thyroid Eye DiseasePHASE3 RECRUITING 99Dec 5, 2025Jan 29, 2028Dec 29, 202527 China
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Study Endpoints
Primary Endpoints
Proptosis Responder Rate in the study eye
At Week 24

Proportion of participants with a ≥2 mm reduction from baseline in proptosis in the study eye \[without a corresponding increase of ≥2 mm in the fellow eye\]

Secondary Endpoints
Change from baseline in proptosis in the study eye
At Week 24
Overall Responder Rate in the study eye
At Week 24
Change from baseline in Clinical Activity Score (CAS) in the study eye
At Week 24
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Study Design & Arms
AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Randomized controlled period: ZL-1109 every 4 weeksEXPERIMENTALParticipants will receive ZL-1109 per protocol defined dosing regimen.
Randomized controlled period: ZL-1109 every 8 weeksEXPERIMENTALParticipants will receive ZL-1109 and placebo per protocol defined dosing regimen.
Randomized controlled period: Placebo every 4 weeksPLACEBO_COMPARATORParticipants will receive placebo per protocol defined dosing regimen.
OLE treatment period: ZL-1109 every 4 weeksOTHERParticipants who not responded would receive ZL-1109 per protocol defined dosing regimen.
Interventions
NameTypeDescription
ZL-1109 (VRDN-003)DRUGZL-1109 subcutaneous injection
PlaceboDRUGMatching placebo subcutaneous injection
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites27

Key Inclusion Criteria: 1. Have moderate to severe TED 2. Must meet the clinical diagnosis criteria of active TED 3. Must agree to use highly effective contraception as specified in the protocol 4. Female TED participants must have a negative serum pregnancy test at screening Key Exclusion Criteri...

Countries:China
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT07211776primaryCompletionDate: changed
LOWMay 24, 2026NCT07211776studyFirstPostDate: changed