AstraZeneca plc is a British-Swedish multinational pharmaceutical and biologics company headquartered in London, United Kingdom. It is the world's seventh-largest pharmaceutical company measured by 2012 prescription drug sales and has operations in over 100 countries
1993 the British chemicals company ICI demerged its pharmaceuticals businesses and its agrochemicals and specialties businesses, to form Zeneca Group plc,.
1999 Astra and Zeneca Group merged to form AstraZeneca plc, with its headquarters in London.
1999 AstraZeneca identified as a new location for the company's US base the "Fairfax-plus" site in North Wilmington, Delaware
2000 The Novartis Agribusiness and Zeneca Agrochemicals businesses were merged as Syngenta.
2015 AstraZeneca has a workforce of more than 6,700 employees across seven sites in the UK.[1]