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GlaxoSmithKline (GSK)

GlaxoSmithKline plc (GSK) is a British multinational pharmaceutical, biologics, vaccines and consumer healthcare company headquartered in Brentford, London. It is the world's fourth-largest pharmaceutical company after Pfizer, Novartis and Sanofi, measured by 2009 prescription drug sales. The company was established in 2000 by the merger of Glaxo Wellcome plc (formed from the acquisition of Wellcome plc by Glaxo plc) and SmithKline Beecham plc (formed from the merger of Beecham plc and SmithKline Beckman Corporation, which in turn was formed by combining the Smith Kline French and Beckman companies). The company has a primary listing on the London Stock Exchange and is a constituent of the FTSE 100 Index. As of 6 July 2012 it had a market capitalisation of £74.8 billion, the fifth-largest of any company listed on the London Stock Exchange. It has a secondary listing on the New York Stock Exchange. Andrew Witty has been the chief executive officer since May 2008. GSK manufactures drugs for major disease areas such as asthma, cancer, infections, diabetes, digestive and mental health conditions. Many medicines were historically discovered or developed at GSK and its legacy companies and are now sold as generics.