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CSL Behring

Drugmaker with rare disease work · based in Melbourne, Australia · founded 1916 · ticker CSL · cslbehring.com

CSL Behring works on 17 rare diseases we track, including Acute Myeloid Leukemia, Alpha-1 Antitrypsin Deficiency and 15 more. It has 14 active clinical trials, and 13 are looking for volunteers now. It also has 11 FDA-approved rare disease drugs.

CSL Behring is a global leader in plasma-derived and recombinant therapies for rare diseases including bleeding disorders, immune deficiencies, and hereditary angioedema. Key products include Hemgenix (etranacogene dezaparvovec), the first gene therapy for hemophilia B, Idelvion (Factor IX) for hemophilia B, Haegarda (C1 esterase inhibitor) for hereditary angioedema, and Hizentra (subcutaneous immunoglobulin) for primary immunodeficiency and CIDP.

CSL Behring pipeline

Each row lists the diseases CSL Behring is studying at that stage, from the ones closest to approval down to the earliest work.

Approved
Drugs the FDA has approved.

Andembry (garadacimab) · AFSTYLA Antihemophilic Factor (Recombinant), Single Chain (antihemophilic factor, human recombinant) · Berinert (human c1-esterase inhibitor) · HAEGARDA C1 Esterase Inhibitor Subcutaneous (Human) (human c1-esterase inhibitor) · Hemgenix (etranacogene dezaparvovec) · Hizentra (human immunoglobulin g) · Humate-P (antihemophilic factor/von willebrand factor complex (human)) · Idelvion (coagulation factor ix recombinant human) · Privigen (human immunoglobulin g) · Rhophylac (human rho(d) immune globulin) · 1 more

Phase 3
Large studies, usually the last step before a company asks the FDA for approval.

Hemophilia B 2 trials recruiting

Phase 2
Mid-size studies that check whether a drug works and at what dose.

Sickle Cell Disease 2 trials recruiting · Non-cystic Fibrosis Bronchiectasis recruiting · Eosinophilic Esophagitis recruiting

After approval
Studies that follow people already taking an approved drug.
Other studies
Studies with no phase listed, such as registries and natural history studies.

Hemophilia B 2 trials recruiting · Hematologic Disorder recruiting · Hereditary Angioedema recruiting · Chronic Inflammatory Demyelinating Polyneuropathy recruiting

CSL Behring clinical trials

These are CSL Behring trials for the rare diseases we track, from ClinicalTrials.gov. Statuses there can lag behind company news, so confirm with the study team before you plan around one.

13 trials looking for volunteers now

Looking for volunteersPhase 2Recently updatedNCT07224360

Safety of Anumigilimab (CSL324) in Adults With Sickle Cell Disease (SCD)

Tests Anumigilimab, Placebo

For Sickle Cell Disease

This is a phase 2a, global, multicenter, randomized, double-blind, placebo-controlled study investigating the safety of anumigilimab administered subcutaneously (SC) at the maximum tolerated dose (MTD) in adult participants with SCD. The primary aim of the study is to assess the safety of anumigilimab in participants with SCD. Participants will be treated for 64 weeks: for 12 weeks in the dose escalation period, where the dose will be escalated to each participant's individual MTD; and for 52 weeks at the MTD in the maintenance period.

Ages 18 Years+38 locations
View full study
Looking for volunteersPhase 3Recently updatedNCT07080905

Phase 3, Open-label, Single-dose Study of CSL222 in Adolescent Male Subjects (≥ 12 to < 18 Years of Age) With Severe or Moderately Severe Hemophilia B

Tests CSL222 (Adeno-associated viral vector serotype 5 [AAV5]-hFIXco-Padua)

For Hemophilia B

This is a phase 3, prospective, open-label, single-arm, single-dose, multicenter study investigating the efficacy, safety, and tolerability of CSL222 (AAV5-hFIXco-Padua) in adolescent male participants with severe or moderately severe hemophilia B.

Ages 138 Months - 206 Months17 locations
View full study
Looking for volunteersPhase 2Recently updatedNCT07048262

Dose Range Finding, Efficacy, and Safety Study of Nebulized CSL787 in Adults With Non-cystic Fibrosis Bronchiectasis (NCFB)

Tests CSL787, Placebo, Nebulizer

For Non-cystic Fibrosis Bronchiectasis

This study is a proof-of-concept phase 2b, multicenter, randomized, double-blind, placebo-controlled, parallel-group, dose selection study designed to explore the efficacy, safety, and tolerability of 2 active treatment regimens of CSL787 (human normal immunoglobulin G \[IgG\] inhalation solution) compared with placebo over 52 weeks. The primary aim of the study is to characterize the overall effect of CSL787 as well as the dose response of 2 active treatment regimens of inhaled CSL787 administered to participants with NCFB toward prolonging the time to first (TTF) exacerbation.

Ages 18 Years - 85 Years13 locations
View full study
Looking for volunteersPhase 4Recently updatedNCT07326592

Phase 4, Double-blind Study Evaluating the Response on Computed Tomography (CT) Lung Density Decline Rates of Respreeza / Zemaira Weekly for 3 Years in Adults With alpha1 Antitrypsin Deficiency (AATD)

Tests CE1226

For Alpha1 Antitrypsin Deficiency, Alpha1-Proteinase Inhibitor Deficiency and Emphysema

This is a multicenter, parallel-group, double-blind, randomized phase 4 study designed to identify the optimal dose of CE1226 (2 active doses) to slow disease progression as assessed by reduced rates of annual lung density decline in alpha-1 antitrypsin (AAT) deficient participants over 3 years as compared with the marketed dose 60 milligrams per kilogram (mg/kg).

Ages 18 Years - 65 Years2 locations
View full study
Looking for volunteersPhase 2Recently updatedNCT06699849

Safety, Efficacy, and Pharmacokinetics of CSL889 in Adults and Adolescents With Sickle Cell Disease During Vaso-Occlusive Crisis

Tests CSL889, Placebo

For Sickle Cell Disease Vaso-occlusive Crisis

This is a phase 2, randomized, multiple-dose, placebo-controlled study designed to evaluate the safety, efficacy, and pharmacokinetics (PK) of CSL889 (human hemopexin) when given intravenously (IV) to adults and adolescents with sickle cell disease (SCD) experiencing vaso-occlusive crises (VOC). The main objectives of the study are to evaluate the safety and tolerability of CSL889 in study participants, and to assess how CSL889 affects the time it takes for VOC to resolve in participants with SCD.

Ages 12 Years+30 locations
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Looking for volunteersPhase 3Recently updatedNCT06003387

Efficacy and Safety of CSL222 (Etranacogene Dezaparvovec) Gene Therapy in Adults With Hemophilia B With Pretreatment Adeno-associated Virus Serotype 5 (AAV5) Neutralizing Antibodies (Nabs)

Tests CSL222 (AAV5-hFIXco-Padua)

For Hemophilia B

The purpose of this study is to assess the risk of bleeding due to failure of expected pharmacological action of CSL222 in adults with severe or moderately severe hemophilia B with detectable pretreatment AAV5 Nabs.

Ages 18 Years+32 locations
View full study
Looking for volunteersRecently updatedNCT04398628

ATHN Transcends: A Natural History Study of Non-Neoplastic Hematologic Disorders

For Hematologic Disorder, Bleeding Disorder, Connective Tissue Disorder, Hemophilia and Thrombosis

In parallel with the growth of ATHN's clinical studies, the number of new therapies for all blood disorders is increasing significantly. Some of the recently FDA-approved therapies for congenital and acquired hematologic conditions have not yet demonstrated long-term safety and effectiveness beyond the pivotal trials that led to their approval. In addition, results from well controlled, pivotal studies often cannot be replicated once a therapy has been approved for general use.2,3,4,5 In 2019 alone, the FDA has issued approvals for 24 new therapies for congenital and acquired hematologic conditions.6 In addition, almost 10,000 new studies for hematologic diseases are currently registered on www.clinicaltrials.gov.7 With this increase in potential new therapies possible, it is imperative that clinicians and clinical researchers in the field of non-neoplastic hematology have a uniform, secure, unbiased, and enduring method to collect long-term safety and efficacy data. As emphasized in a recently published review, accurate, uniform and quality national data collection is critical in clinical research, particularly for longitudinal cohort studies covering a lifetime of biologic risk.8

Ages not specified76 locations
View full study
Looking for volunteersUpdated a few months agoNCT07001280

A Study Investigating the Effectiveness and Safety of Garadacimab for Treating Patients With Hereditary Angioedema (HAE)

Tests No intervention

For Hereditary Angioedemas

This is a multinational, multicenter, prospective, observational cohort study of patients with HAE in the real-world setting. The study will include patients newly initiating garadacimab in routine clinical practice. Each participant will be followed for 48 months after index date (date of the first administration of garadacimab). Patient data will be collected from the HAE eDiary, patient medical records (MRs) and/or during a routine clinical visit and will be entered into the electronic case report form (eCRF) via an electronic data capture (EDC) system. Data pertaining to HAE attacks, prior HAE treatments, retrospective focused safety data collection, and healthcare resource utilization (HCRU) over a look-back period of 12 months prior to the enrollment will be extracted from the MR, and patients will also record retrospective HAE attack related data over a look-back period of 3 months prior to enrollment in the HAE eDiary. The primary aim of this study is to investigate the real-world effectiveness of garadacimab as measured by HAE attack rate before and after garadacimab initiation in patients with HAE over 24 months of follow-up. The study will aim to complement the data available from the clinical development program on the efficacy, safety, and health-related quality-of-life (HRQoL) in patients with HAE taking garadacimab.

Ages 12 Years+22 locations
View full study
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FDA-approved drugs from CSL Behring

From the openFDA database. Tap a drug for side effects, dosing and help paying.

Andembry garadacimab

For Hereditary Angioedema. Approved Jun 16, 2025. Taken by subcutaneous route.

AFSTYLA Antihemophilic Factor (Recombinant), Single Chain antihemophilic factor, human recombinant

For Hemophilia A.

Berinert human c1-esterase inhibitor

For Hereditary Angioedema.

HAEGARDA C1 Esterase Inhibitor Subcutaneous (Human) human c1-esterase inhibitor

For Hereditary Angioedema.

Hemgenix etranacogene dezaparvovec

For Hemophilia B.

Hizentra human immunoglobulin g

For Chronic Inflammatory Demyelinating Polyneuropathy, Common Variable Immunodeficiency and Wiskott-Aldrich Syndrome. Taken by subcutaneous route.

Humate-P antihemophilic factor/von willebrand factor complex (human)

For Hemophilia A and Von Willebrand Disease.

Idelvion coagulation factor ix recombinant human

For Hemophilia B.

Rhophylac human rho(d) immune globulin

For Immune Thrombocytopenia. Taken by intramuscular, intravenous route.

Zemaira alpha-1-proteinase inhibitor human

For Alpha-1 Antitrypsin Deficiency.

More about CSL Behring

CSL Behring is part of CSL Limited, which also acquired Vifor Pharma in 2022 to expand into nephrology and iron deficiency.

Where CSL Behring trials take place

The trials above run at 309 study sites in 26 countries. Tap a country to see its states, cities and hospitals.

United States
140▼
France
64▼
United Kingdom
19▼
Turkey (Türkiye)
14▼
Japan
11▼
Germany
10▼
Australia
8▼
Italy
6▼
Taiwan
5▼
Belgium
3▼
Austria
3▼
Spain
3▼

Rare diseases CSL Behring works on

Each disease page lists every open trial, not only CSL Behring's, plus approved treatments.

Acute Myeloid Leukemia

Acute myeloid leukemia (AML) is a fast-growing cancer of the bone marrow in which immature white blood cells called blasts crowd out normal blood cells, causing fatigue, infections and bleeding...

How common: The National Cancer Institute's SEER program estimates 22,720 new US cases and 11,500 deaths in 2026, about 1.1% of new cancers, and 83,311 people were living with AML in 2023

Alpha-1 Antitrypsin Deficiency

Alpha-1 antitrypsin deficiency is a genetic disorder affecting the lungs and liver, caused by insufficient production of the protective protein alpha-1 antitrypsin.

How common: 1 in 1,500 to 3,500 people of European ancestry; about 100,000 people in the U.S

Ataxia-Telangiectasia

Ataxia-telangiectasia (A-T) is a rare inherited disorder in which the ATM gene, which coordinates DNA repair, does not work.

How common: 1 in 40,000 to 100,000 people worldwide

Chronic Inflammatory Demyelinating Polyneuropathy

Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) is an autoimmune disorder affecting the peripheral nerves, causing progressive weakness and impaired function in the legs and arms.

How common: About 2.8 per 100,000 people in a 2019 pooled analysis of 9 studies (Broers et al., Neuroepidemiology); NORD estimates 5 to 7 per 100,000, and NIH's GARD estimates about 50,000 people in the U.S

Common Variable Immunodeficiency

Common variable immunodeficiency is a primary immunodeficiency disorder characterized by low levels of immunoglobulins and impaired antibody responses.

How common: 1 in 25,000 to 50,000 people

Cystic Fibrosis

Cystic fibrosis is an autosomal recessive genetic disorder affecting the CFTR protein, which normally regulates chloride transport.

How common: Nearly 40,000 children and adults in the U.S.; 1 in 2,500 to 3,500 births among Caucasians

Dermatomyositis

Dermatomyositis is a rare autoimmune inflammatory disease causing muscle weakness and distinctive skin rashes, particularly over joints.

How common: About 9.6 new cases per million people a year, according to NORD; juvenile-onset incidence about 0.4 cases per 100,000 children

Eosinophilic Esophagitis

Eosinophilic Esophagitis is a rare allergic/immune-mediated inflammatory disease of the esophagus characterized by eosinophil infiltration causing progressive narrowing and dysfunction.

How common: About 142.5 per 100,000 people in the United States, about 1 in 700 or an estimated 472,380 people, in a 2025 insurance claims study (Thel et al., Clin Gastroenterol Hepatol 2025)

Hemophilia A

Hemophilia A is an X-linked bleeding disorder caused by deficiency or dysfunction of clotting factor VIII.

How common: 1 in 4,000 to 5,000 males worldwide; very rare in females

Hemophilia B

Hemophilia B is an X-linked bleeding disorder caused by deficiency or dysfunction of clotting factor IX.

How common: 1 in 25,000 to 33,000 males; very rare in females

Hereditary Angioedema

Hereditary Angioedema is a rare genetic disorder characterized by sudden, severe swelling (angioedema) of skin and mucous membranes affecting the face, hands, feet, gastrointestinal tract, and...

How common: About 1 in 50,000 people worldwide (MedlinePlus Genetics); NORD gives 1 in 50,000 to 150,000

Idiopathic Pulmonary Fibrosis

Idiopathic pulmonary fibrosis is a chronic, progressive lung disease characterized by scarring (fibrosis) of lung tissue.

How common: About 100,000 people in the U.S., with 30,000 to 40,000 new cases a year (MedlinePlus Genetics)

Immune Thrombocytopenia

Immune thrombocytopenia (ITP) is a rare autoimmune disorder in which the immune system destroys platelets, the blood cells that stop bleeding, and slows their production.

How common: Estimated 9 to 20 per 100,000 people; children often have a temporary form that resolves within months

Myasthenia Gravis

Myasthenia gravis is a chronic autoimmune neuromuscular disorder causing muscle weakness and rapid fatigue.

How common: 1 in 5,000 people

Sickle Cell Disease

Sickle cell disease is an inherited blood disorder where hemoglobin polymerizes under low oxygen, causing red blood cells to become rigid, sickle-shaped, and prone to hemolysis and vaso-occlusion.

How common: About 100,000 Americans with SCD; about 1 in 365 Black or African American births and 1 in 16,300 Hispanic American births

Systemic Sclerosis

Systemic sclerosis (scleroderma) is a rare autoimmune disease in which the immune system triggers scarring (fibrosis) of the skin and internal organs while also damaging small blood vessels.

How common: About 276 per million U.S. adults in a large Detroit-area study; about 19 new cases per million adults each year

Von Willebrand Disease

Von Willebrand disease is the most common inherited bleeding disorder, caused by quantitative or qualitative deficiency of von Willebrand factor.

How common: 1-3% of the general population; 1 in 10,000 with clinically significant disease

Where to get support

Patient groups can explain a diagnosis, point you to specialists and tell you about trials before they open. CSL Behring's own site is cslbehring.com, and our help paying for treatment page lists drugmaker programs and charity funds.

Questions about CSL Behring