Eli Lilly and Company is an American global pharmaceutical company with headquarters located in Indianapolis, Indiana, in the United States. The company also has offices in Puerto Rico and 17 other countries. Their products are sold in approximately 125 countries. The company was founded in 1876 by Col. Eli Lilly, a pharmaceutical chemist and veteran of the American Civil War, after whom the company was named. Among other specialties, Lilly was the first company to mass-produce penicillin, the Salk polio vaccine, and insulin, including one of the first pharmaceutical companies to produce human insulin using recombinant DNA. Lilly is also the world’s largest manufacturer and distributor of psychiatric medications.