IMS Health is an American company that provides information, services and technology for the healthcare industry. It is the largest vendor of U.S. physician prescribing data. IMS Health was founded in 1954 by Bill Frohlich and David Dubow. In 2010, IMS Health was taken private by TPG Capital, CPP Investment Board and Leonard Green & Partners. The company went public on April 4, 2014 and began trading on the NYSE under the symbol IMS. Ari Bousbib is IMS Health’s Chairman and CEO. Bousbib, formerly a longtime senior executive at United Technologies Corporation, joined the company in September 2010. IMS Health is headquartered in Danbury, Connecticut.