AstraZeneca is a British-Swedish multinational pharmaceutical and biopharmaceutical company with its headquarters in Cambridge, United Kingdom and Södertälje, Sweden. Its R&D is concentrated in Cambridge in United Kingdom, Södertälje in Sweden, and Maryland and Toronto in North America. AstraZeneca has a portfolio of products for major disease areas including cancer, cardiovascular, gastrointestinal, infection, neuroscience, respiratory and inflammation. AstraZeneca AB, the Swedish arm of the company, is a subsidiary of AstraZeneca PLC.
The company was founded in 1999 through the merger of the Swedish Astra AB and the British Zeneca Group (itself formed by the demerger of the pharmaceutical operations of Imperial Chemical Industries in 1993). Since the merger it has been among the world's largest pharmaceutical companies and has made numerous corporate acquisitions, including Cambridge Antibody Technology (in 2006), MedImmune (in 2007), Spirogen (in 2013) and Definiens (by MedImmune in 2014).
AstraZeneca has a primary listing on the London Stock Exchange and is a constituent of the FTSE 100 Index. It has secondary listings on the Nasdaq, the Bombay Stock Exchange, National Stock Exchange of India and the OMX exchange.