Since 2007, Regeneron and Sanofi have collaborated to help people with debilitating and complex conditions that are
often difficult to diagnose and treat, using fully-human monoclonal antibodies. Regeneron is a leading science-based
biopharmaceutical company based in Tarrytown, New York that discovers, invents, develops, manufactures, and
commercializes medicines for the treatment of serious medical conditions. Sanofi Genzyme, the specialty care business
unit of Sanofi, focuses on rare diseases, multiple sclerosis, oncology, and immunology. ONC.21.01.0029 2/21