Annexon, Inc. is a clinical-stage biopharmaceutical company, which develops a pipeline of novel therapies for patients with classical complement-mediated disorders of the body, eye and brain. The company is headquartered in Brisbane California, California and currently employs 80 full-time employees. The company went IPO on 2020-07-24. The firm is engaged in developing complement medicines for patients suffering from serious complement-mediated autoimmune, neurodegenerative and ophthalmic disorders. Its pipeline includes three clinical-stage assets across three therapeutic franchises: Autoimmune, Neurodegeneration and Ophthalmology. Its lead candidate, ANX005, is a monoclonal antibody formulated for intravenous administration for several autoimmune indications. ANX005 is being evaluated in a Phase II/III clinical trial for the treatment of patients with Guillain-Barre Syndrome and a Phase II trial in patients with warm autoimmune hemolytic anemia. The company ANX009 clinical candidate is a subcutaneous formulation of an antigen-binding fragment, which is evaluates in a Phase I trial. The company is also developing ANX005, which is in Phase II trials in Huntington’s disease and amyotrophic lateral sclerosis. The firm's ANX007 program is a Fab formulated.

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