ALDI is a leading global discount supermarket chain with over 9,000 stores in over 18 countries, and an estimated turnover of more than €50bn

ASDA is the UK based subsidiary of US retail giant Wal-mart Stores, Inc.

Auchan SA is a French international retail group and multinational corporation headquartered in Croix, France. It is one of the world's principal distribution groups with a presence in 12 countries and 175,000 employees.

Carrefour is one of the world's largest retailers. By December 31, Carrefour was operating 12.296 stores in more than 30 countries in Europe, Latin America and Asia.

Colruyt Group is a family business that has grown over three generations into a retail group with more than 30.000 employees and a diverse portfolio of food and non-food formats, in Belgium, France and Luxembourg.

Iceland is a privately owned supermarket chain in the United Kingdom with a strong focus on frozen foods

Lidl Stiftung & Co. KG is a German global discount supermarket chain that operates over 10,000 stores across Europe.

Mercadona, a family company, is one of the leading physical supermarket and online shopping companies in Spain.

Ocado Group is a UK based technology company admitted to trading on the London Stock Exchange. It provides end-to-end online grocery fulfillment solutions to some of the world's largest grocery retailers

Sainsbury's is the second largest chain of supermarkets in the United Kingdom, with a 16.9% share (2015) of the supermarket sector in the United Kingdom.