Genzyme Corporation is an American biotechnology company based in Cambridge, Massachusetts. Since its acquisition in 2011, Genzyme has been a fully owned subsidiary of Sanofi. In 2010 Genzyme was the world’s third-largest biotechnology company, employing more than 11,000 people around the world. As a subsidiary of Sanofi, Genzyme has a presence in approximately 65 countries, including 17 manufacturing facilities and 9 genetic-testing laboratories, its products are sold in 90 countries.