Marks and Spencer plc is a major British multinational retailer based in London, England, that specialises in selling clothing, beauty products, home products and food products. It is listed on the London Stock Exchange (LSE) and is a constituent of the FTSE 100 Index.

The Financial Times Stock Exchange 100 Index, also called the FTSE 100 Index, FTSE 100, FTSE, or, informally, the "Footsie", is the United Kingdom's best-known stock market index of the 100 most highly capitalised blue chip companies listed on the London Stock Exchange. Founded in 1984 by the Stock Exchange to better reflect activity on the market, it replaced the Financial Times own FT 30.