This timeline depicts Tesco's number of stores worldwide from 2008 to 2013. In 2010, Tesco operated 4,836 stores worldwide. Tesco, founded in 1919 by Jack Cohen (1898-1979), is a British multinational grocery and general merchandise retailer. It is headquartered in Cheshunt, United Kingdom where it is the grocery market leader. Further products are consumer goods, financial services, and telecoms.