Sainsbury's, officially known as J Sainsbury plc, is the second-largest chain of supermarkets in the United Kingdom and a well-known public limited corporation. John James Sainsbury established the business in 1869, and it has since expanded to run more than 1,400 stores throughout the United Kingdom. Sainsbury's has its headquarters in London, England, and offers a wide selection of goods, including supermarkets, convenience stores, and forecourt shop items. The main brands of the corporation are Argos, Habitat, Nectar, and TU.

Sainsbury's has built a solid reputation for excellence and affordability over time. The founding principle of the business was "Perfect quality, lower prices." Since the company's beginnings, this dedication to quality and affordability has been a pillar of Sainsbury's operations. The company has also demonstrated a strong commitment to innovation by setting the bar for own-brand product creation and being a forerunner in the UK's adoption of self-service supermarkets.

Additionally, Sainsbury's has expanded its business beyond retail. Sainsbury's Supermarkets Ltd. (which includes convenience stores), Sainsbury's Bank, and Argos are the three divisions that make up the holding company, J Sainsbury plc. The Qatar Investment Authority, the nation's sovereign wealth fund, is the company's largest overall shareholder, owning 14.99% of the business. Sainsbury's is an index component and has a listing on the London Stock Exchange.