Denis Defforey (July 7, 1925 - February 6, 2006) was a French businessman.
[2] At the dawn of the 1960s, the Defforey family managed a food wholesale business in the French Ain region.
[2] With his brother Jacques Defforey and Marcel Fournier, Denis Defforey traveled to the United States in the early 1960s to study and export the new models of superstores.
[4] With the explicit goal to go after the new E.Leclerc stores,[2] they opened the first Carrefour superstore in 1963 in Sainte-Geneviève-des-Bois.
[4] The Defforey family remained minor shareholders of the group Carrefour until 2004.