AstraZeneca plc is a Swedish–British multinational pharmaceutical and biotechnology company with its headquarters at the Cambridge Biomedical Campus in Cambridge, UK. It has a portfolio of products for major diseases in areas including oncology, cardiovascular, gastrointestinal, infection, neuroscience, respiratory, and inflammation. The company was founded in 1999 through the merger of the Swedish Astra AB and the British Zeneca Group. Zeneca shareholders received 53.5% of the shares, while Astra shareholders received the remaining 46.5%. Its portfolio includes primary and speciality care, coverage for rare diseases, and a robust global presence across various regions. Since the merger it has been among the world's largest pharmaceutical companies and has made numerous corporate acquisitions, including Cambridge Antibody Technology, MedImmune, Spirogen and Definiens. It has its research and development concentrated in three strategic centres: Cambridge, UK; Gothenburg, Sweden; and Gaithersburg, Maryland, US. AstraZeneca traces its earliest corporate history to 1913, when Astra AB was formed by a large group of doctors and apothecaries in Södertälje. Wikipedia