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. It offers drugs that control or target huntington’s and alzheimer’s disease, multiple sclerosis, glaucoma, parkinson’s disease, and spinal muscular atrophy. The company was founded by Ben Barres and Arnon Rosenthal on March 3, 2011 and is headquartered in Brisbane, CA.