Associated British Foods plc (ABF) is a British multinational food processing and retailing company headquartered in London, England. Its ingredients division is the world's second-largest producer of both sugar and baker's yeast and a major producer of other ingredients including emulsifiers, enzymes and lactose. Its grocery division is a major manufacturer of both branded and private label grocery products and includes the brands Mazola, Ovaltine, Ryvita, Jordans and Twinings. Its retail division, Primark, has some 384 stores across several countries, predominantly Germany, Ireland, Netherlands, Spain, and the UK. ACH Food Companies is an American subsidiary.

Associated British Foods is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.