GlaxoSmithKline plc is a global pharmaceutical company headquartered in London, UK. It is the 3rd largest pharmaceutical company by revenue and has leading market share in anti-infectives, central nervous system, respiratory, and gastrointestinal drugs. GSK spends over $450,000 per hour on research and development and has acquired several companies in recent years to expand its product portfolio. The company's business model focuses on several therapeutic areas with respiratory, central nervous system, and vaccines being the largest segments by revenue.