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ARGX-124

Phase 1

Undisclosed | Monoclonal antibody | Other |argenx SE|Trials Updated: Mar 6, 2026

ARGX-124 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Jan 2026

ARGX-124 target and mechanism

Molecular targetFcRn
Target classProtein
ModalityMonoclonal antibody

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment104

FDA Designations

No designations recorded

ARGX-124 clinical trials

ARGX-124 · 1 trial · 1 indication

Phase 1 1
NCT07377396A Study to Assess the Safety of ARGX-124 in Healthy VolunteersHealthy Volunteers
RECRUITING104 Analytics
PHASE1RECRUITING
A Study to Assess the Safety of ARGX-124 in Healthy Volunteers
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Study Endpoints

Primary Endpoints

Incidence of AEs, SAEs and AEs leading to ARGX-124 discontinuation
Up to 23 weeks

AE : adverse event ; SAE : serious adverse event.

Secondary Endpoints

Maximum observed serum concentration (Cmax)
Up to 23 weeks
Percent change from baseline in total IgG levels in serum over time
Up to 23 weeks
Incidence of ADA against ARGX-124 in serum
Up to 23 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ARGX-124EXPERIMENTALParticipants receiving the experimental drug
PlaceboPLACEBO_COMPARATORParticipants receiving placebo

Interventions

NameTypeDescription
ARGX-124BIOLOGICALAdministrations of ARGX-124
PlaceboOTHERAdministrations of placebo comparator
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Is at least the local legal age of consent and aged 18 to 65 years, inclusive, when signing the ICF. * Is a female of Nonchildbearing Potential (postmenopausal or surgically sterilized) or a male. * Has a body weight between 50 and 120 kg and a BMI between 18 and 30.5 kg/m2, i...

Countries:Canada
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Frequently asked questions about ARGX-124

What is ARGX-124?

ARGX-124 is an investigational monoclonal antibody being developed by argenx SE. It is in Phase 1 clinical development and is currently being studied in healthy adult volunteers. The specific diseases or conditions it may eventually treat have not been disclosed.

What does ARGX-124 target?

ARGX-124 targets FcRn, the neonatal Fc receptor. FcRn is a protein that recycles immunoglobulin G antibodies and extends their circulation time in the body. By binding FcRn, ARGX-124 is designed to interact with this recycling pathway, which is the mechanism argenx is evaluating in early clinical testing.

Who is developing ARGX-124?

ARGX-124 is being developed by argenx SE, a biotechnology company that trades under the ticker symbol ARGX. Argenx is the sponsor of the clinical program evaluating ARGX-124 and holds the asset within its pipeline of FcRn-directed antibody candidates.

What phase is ARGX-124 in?

ARGX-124 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA or any other regulatory authority. The Phase 1 program is designed to assess safety in healthy volunteers before any later-stage studies in patients.

What clinical trials is ARGX-124 in?

ARGX-124 is being evaluated in one clinical trial, NCT07377396, titled A Study to Assess the Safety of ARGX-124 in Healthy Volunteers. The trial is a Phase 1, randomized, double-blind, placebo-controlled study recruiting 104 healthy adult participants in Canada.

Is ARGX-124 tested in healthy volunteers?

Yes. The ongoing Phase 1 trial of ARGX-124, NCT07377396, enrolls healthy volunteers rather than patients. It is a randomized, double-blind, placebo-controlled study of 104 participants aged 18 years and older, including all sexes, and it is currently recruiting in Canada.