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Efgartigimod PH20 - prefilled syringe

Phase 2

Antibody-mediated Rejection | Small molecule | Other |argenx SE|Last Updated: Mar 18, 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-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment30
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06503731A Study to Evaluate the Safety and Tolerability of Efgartigimod PH20 SC Given by Prefilled Syringe in Kidney Transplant Recipients With Antibody-Mediated Rejection (AMR)PHASE2 RECRUITING 30Aug 30, 2024Sep 1, 2027Mar 18, 202623 United States, Austria +6
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Study Endpoints
Primary Endpoints
Incidence of Adverse Events (AEs)
Up to 78 weeks
Percentage of participants with permanent treatment discontinuation due to adverse events (AEs)
Up to 48 weeks
Secondary Endpoints
Changes from baseline (slope) of the estimated glomerular filtration rate (eGFR)
Up to 72 weeks
Histological changes in kidney biopsy
Up to 72 weeks
Urine protein creatinine ratio (UPCR)
Up to 72 weeks
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Treatment arm 1EXPERIMENTALParticipants receiving Efgartigimod PH20 SC on top of optimized standard background immunosuppression therapy (tacrolimus, mycophenolate mofetil, and optionally steroids)
Treatment arm 2EXPERIMENTALParticipants receiving Efgartigimod PH20 SC on top of optimized standard background immunosuppression therapy (tacrolimus, mycophenolate mofetil, and optionally steroids) up to week 24 followed by placebo PH20 SC on top of optimized standard background immunosuppression therapy from weeks 24 to 48
Treatment arm 3PLACEBO_COMPARATORParticipants receiving Placebo PH20 SC on top of optimized standard background immunosuppression therapy (tacrolimus, mycophenolate mofetil, and optionally steroids)
Interventions
NameTypeDescription
Efgartigimod PH20 SC - prefilled syringeCOMBINATION_PRODUCTSubcutaneous efgartigimod PH20 SC given by prefilled syringe
Placebo PH20 SC - prefilled syringeOTHERSubcutaneous placebo PH20 SC given by prefilled syringe
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Eligibility Criteria
Age Range18 Years — 80 Years
SexALL
Healthy VolunteersNo
Study Sites23

Inclusion Criteria: * The participant is within the ages of 18 and 80 years old * The participant had a kidney transplant (living or deceased donor) at least 6 months before the study * The participant has received a diagnosis of active or chronic active antibody-mediated rejection (AMR) with detec...

Countries:United StatesAustriaBelgiumCanadaCzechiaFranceGermanySpain
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06503731primaryCompletionDate: changed
LOWMay 24, 2026NCT06503731studyFirstPostDate: changed