J Sainsbury plc is the parent company of Sainsbury's Supermarkets Ltd, commonly known as Sainsbury's, the second largest chain of supermarkets in the United Kingdom with a share of the UK supermarket sector of 16.6%. The group's head office is in the Sainsbury's Store Support Centre in Holborn Circus, City of London. The group also has interests in property and banking.Sainsbury's was founded in 1869 by John James Sainsbury and his wife Mary Ann Sainsbury (née Staples), in London, England, and grew rapidly during the Victorian era. It grew to become the largest grocery retailer in 1922, pioneered self-service retailing in the UK, and had its heyday during the 1980s. In 1995, Tesco overtook Sainsbury's to become the market leader, and Asda became the second largest in 2003, demoting Sainsbury's into third place. In October 2013, Sainsbury's overtook Asda to become the second largest supermarket.