Marathon Pharmaceuticals LLC is a privately held biopharmaceuticals company focused on drugs for people with rare diseases. The Northbrook, Illinois-based company develops and manufactures therapeutics and brings them to market. It employs 100 people in four global locations. Marathon produces medicines for high-need, small patient populations, including patients with rare diseases as outlined by the U.S. Food and Drug Administration’s (FDA) Orphan Drug Act. The Act defines rare diseases as impacting fewer than 200,000 patients in the U.S. Marathon develops late-stage drugs, earns regulatory approvals, and then manufactures and commercializes medicines with input from patient advocacy groups. Marathon’s regulatory efforts center on gaining FDA approval of New Drug Applications (NDA) or Biologic License Applications (BLA).