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ClinicalTrials.gov public records Last synced Oct 17, 2026, 2:16 AM EDT

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Showing 1–24 of 59 matching trials from the live ClinicalTrials.gov search.
Filters: Sponsor: argenx Clear all
Completed Phase 2Phase 3 Interventional Results available

A Phase 2/3 Study of Efgartigimod PH20 SC in Adult Participants With Bullous Pemphigoid

NCT05267600
View directory record Official record
Conditions
Bullous Pemphigoid
Interventions
efgartigimod PH20 SC, placebo, Prednisone
Biological · Other · Drug
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
21
States / cities
Phoenix, Arizona • Fountain Valley, California • Redwood City, California + 18 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2025 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 3 Interventional Results available

Evaluating the Long-Term Safety and Tolerability of Efgartigimod PH20 SC Administered Subcutaneously in Patients With Generalized Myasthenia Gravis

NCT04818671
View directory record Official record
Conditions
Generalized Myasthenia Gravis
Interventions
efgartigimod PH20 SC
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
13
States / cities
Carlsbad, California • Palo Alto, California • Boca Raton, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 2Phase 3 Interventional

A Study to Investigate the Efficacy and Safety of Efgartigimod PH20 SC in Adult Participants With Active Idiopathic Inflammatory Myopathy.

NCT05523167
View directory record Official record
Conditions
Active Idiopathic Inflammatory Myopathy, Myositis, Dermatomyositis, Polymyositis, Immune-Mediated Necrotizing Myopathy, Antisynthetase Syndrome
Interventions
EFG PH20 SC, PBO
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
265 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
40
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Beverly Hills, California + 35 more
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Terminated Phase 3 Interventional

A Study of Efgartigimod PH20 SC Given by Prefilled Syringe in Adults With Thyroid Eye Disease

NCT06307613
View directory record Official record
Conditions
Thyroid Eye Disease
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Combination Product · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
16
States / cities
Beverly Hills, California • Irvine, California • Los Angeles, California + 13 more
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 2 Interventional Results available

A Clinical Trial to Investigate the Safety and Tolerability, Efficacy, Pharmacokinetics, Pharmacodynamics and Immunogenicity of 2 Dose Regimens of ARGX-117 in Adults With Multifocal Motor Neuropathy

NCT05225675
View directory record Official record
Conditions
Multifocal Motor Neuropathy
Interventions
ARGX-117, Placebo
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
13
States / cities
Scottsdate, Arizona • San Francisco, California • Washington D.C., District of Columbia + 10 more
Source: ClinicalTrials.gov public record
Updated May 8, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Recruiting No phase listed Observational

ADAPT Forward - Master Protocol of a Platform Study to Evaluate the Safety and Efficacy of Multiple Regimens in Participants With Myasthenia Gravis

NCT07294170
View directory record Official record
Conditions
Myasthenia Gravis, MG, gMG, Generalized Myasthenia Gravis, Generalized Myasthenia Gravis (gMG), AChR-Ab Seropositive Generalized Myasthenia Gravis
Interventions
Efgartigimod IV, Empasiprubart IV, Placebo IV, Efgartigimod PH20 SC PFS
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
15
States / cities
Carlsbad, California • Miami, Florida • Tampa, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Not yet recruiting Phase 2 Interventional

A Study to Evaluate the Effect of ARGX-121 on the Change in Proteinuria in Adult Participants With IgAN

NCT07773727
View directory record Official record
Conditions
Immunoglobulin A Nephropathy (IgAN)
Interventions
ARGX-121, Placebo
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
5
States / cities
Miami, Florida • Pontiac, Michigan • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Recruiting Phase 2 Interventional

A Study to Assess the Safety, Tolerability, Efficacy, Pharmacokinetics, and Immunogenicity of Intravenous Administration of ARGX-119 in Pediatric Participants Aged 5 to Less Than 18 Years With Spinal Muscular Atrophy

NCT07287982
View directory record Official record
Conditions
Spinal Muscular Atrophy (SMA)
Interventions
ARGX-119 IV, Placebo IV
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
5 Years to 17 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
16
States / cities
Little Rock, Arkansas • San Diego, California • Stanford, California + 13 more
Source: ClinicalTrials.gov public record
Updated Oct 8, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Terminated Phase 3 Interventional

A Study of Efgartigimod PH20 SC Given by Prefilled Syringe in Adults With Thyroid Eye Disease.

NCT06307626
View directory record Official record
Conditions
Thyroid Eye Disease
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Combination Product · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
11
States / cities
Los Angeles, California • Mission Hills, California • Rancho Cordova, California + 8 more
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Efficacy and Safety of Efgartigimod PH20 Subcutaneous in Adult Patients With Primary Immune Thrombocytopenia

NCT04687072
View directory record Official record
Conditions
Primary Immune Thrombocytopenia
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
207 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
14
States / cities
Springdale, Arkansas • Los Angeles, California • Washington D.C., District of Columbia + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 31, 2024 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 3 Interventional Results available

Evaluating the Pharmacodynamic Noninferiority of Efgartigimod PH20 SC Administered Subcutaneously as Compared to Efgartigimod Administered Intravenously in Patients With Generalized Myasthenia Gravis

NCT04735432
View directory record Official record
Conditions
Generalized Myasthenia Gravis
Interventions
efgartigimod PH20 SC, efgartigimod IV
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
14
States / cities
Carlsbad, California • Orange, California • Boca Raton, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Feb 28, 2023 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety Study of Efgartigimod in Adults With Post-COVID-19 POTS

NCT05633407
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Efgartigimod, Placebo
Drug
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
11
States / cities
La Jolla, California • Palo Alto, California • Glenview, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated May 23, 2025 · Synced Oct 17, 2026, 2:16 AM EDT
Active, not recruiting Phase 2 Interventional

ARGX-117 in Deceased Donor Kidney Transplant Recipients at Risk for Delayed Graft Function

NCT05907096
View directory record Official record
Conditions
Delayed Graft Function
Interventions
ARGX-117, Placebo
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years to 70 Years
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2030
U.S. locations
8
States / cities
Los Angeles, California • Tampa, Florida • Chicago, Illinois + 5 more
Source: ClinicalTrials.gov public record
Updated Oct 14, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Active, not recruiting Phase 2 Interventional

A Clinical Trial to Investigate the Long-term Safety and Tolerability, Efficacy, Pharmacodynamics, Pharmacokinetics, and Immunogenicity of ARGX-117 in Adults With Multifocal Motor Neuropathy

NCT05405361
View directory record Official record
Conditions
Multifocal Motor Neuropathy (MMN)
Interventions
ARGX-117, Placebo
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
6
States / cities
Scottsdale, Arizona • Glenview, Illinois • Minneapolis, Minnesota + 3 more
Source: ClinicalTrials.gov public record
Updated Mar 11, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 3 Interventional Results available

An Efficacy and Safety Study of ARGX-113 in Patients With Myasthenia Gravis Who Have Generalized Muscle Weakness

NCT03669588
View directory record Official record
Conditions
Generalized Myasthenia Gravis
Interventions
ARGX-113, Placebo
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
25
States / cities
Phoenix, Arizona • Carlsbad, California • Los Angeles, California + 21 more
Source: ClinicalTrials.gov public record
Updated Feb 8, 2022 · Synced Oct 17, 2026, 2:16 AM EDT
Active, not recruiting Phase 2 Interventional

A Study to Evaluate Safety and Efficacy of Empasiprubart in Adults With Dermatomyositis

NCT06284954
View directory record Official record
Conditions
Dermatomyositis, Myositis
Interventions
Empasiprubart IV, Placebo IV
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
9
States / cities
Oceanside, California • DeBary, Florida • Gainesville, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 2 Interventional Results available

A Study to Assess the Safety and Efficacy of a Subcutaneous Formulation of Efgartigimod in Adults With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP, an Autoimmune Disorder That Affects the Peripheral Nerves)

NCT04281472
View directory record Official record
Conditions
Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
Interventions
efgartigimod PH20 SC in stage B, placebo in stage B
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
322 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
45
States / cities
Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 38 more
Source: ClinicalTrials.gov public record
Updated Aug 20, 2024 · Synced Oct 17, 2026, 2:16 AM EDT
Recruiting Phase 2Phase 3 Interventional

A Study of Efgartigimod PH20 SC in Children Between 2 and Less Than 18 Years of Age With Generalized Myasthenia Gravis

NCT06392386
View directory record Official record
Conditions
Generalized Myasthenia Gravis
Interventions
Efgartigimod PH20 SC
Biological
Lead sponsor
argenx
Industry
Eligibility
2 Years to 17 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
3
States / cities
Charlotte, North Carolina • Denton, Texas • Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Recruiting Phase 3 Interventional

A Study to Assess Efficacy and Safety of Efgartigimod PH20 SC PFS in Adult Participants With Graves' Disease

NCT07570316
View directory record Official record
Conditions
Graves' Disease, Graves Disease
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
230 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
27
States / cities
Orange, California • Pasadena, California • San Jose, California + 22 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Active, not recruiting Phase 1 Interventional

A Phase 1b Study to Investigate Safety and Tolerability of ARGX-119 in Adult Participants With DOK7-Congenital Myasthenic Syndromes (CMS)

NCT06436742
View directory record Official record
Conditions
Congenital Myasthenic Syndrome, CMS
Interventions
ARGX-119, Placebo
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
2
States / cities
Sacramento, California • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 24, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Not yet recruiting Phase 2 Interventional

A Study to Learn About How Well the Medicine Efgartigimod Works to Treat Autoimmune Encephalitis In Children 12 Years or Older and Adults

NCT07583641
View directory record Official record
Conditions
Autoimmune Encephalitis (AE)
Interventions
Efgartigimod PH20 (ARGX-113) SC, Placebo PH20 SC
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
12 Years and older
Enrollment
170 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2030
U.S. locations
2
States / cities
Tucson, Arizona • Sherman, Texas
Source: ClinicalTrials.gov public record
Updated Sep 22, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Completed Phase 3 Interventional

A Long-term Study to Assess the Safety and Efficacy of Efgartigimod in Adult Patients With Primary Immune Thrombocytopenia (ITP).

NCT04225156
View directory record Official record
Conditions
Primary Immune Thrombocytopenia
Interventions
efgartigimod
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
4
States / cities
Washington D.C., District of Columbia • Ocala, Florida • Iowa City, Iowa + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Active, not recruiting Phase 3 Interventional

A Study to Assess the Efficacy and Safety of Empasiprubart Versus IVIg in Adults With Multifocal Motor Neuropathy

NCT06742190
View directory record Official record
Conditions
Multifocal Motor Neuropathy (MMN), MMN
Interventions
Empasiprubart, IVIG (Intravenous Immunoglobulin), Empasiprubart-placebo, IVIg-placebo
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
154 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
24
States / cities
Scottsdale, Arizona • Pomona, California • Rancho Mirage, California + 20 more
Source: ClinicalTrials.gov public record
Updated Sep 22, 2026 · Synced Oct 17, 2026, 2:16 AM EDT
Withdrawn Phase 2 Interventional

Evaluating Efgartigimod in Patients With Guillain-Barré Syndrome

NCT05701189
View directory record Official record
Conditions
Guillain-Barre Syndrome
Interventions
Efgartigimod Alfa-Fcab, Intravenous Immunoglobulin (IVIg)
Drug
Lead sponsor
Chafic Karam
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 17, 2026, 2:16 AM EDT