The story
1959: Opened first supermarket in Bagneux Doc
1985: Creation of the first supermarket Atac
1996: Selling of the Docks de France group to Auchan
1998: Birth of the Atac group, a sibling of the Auchan Group.
2005: Launch of the brand Simply Market: opening of its first supermarket in Bagneux
2009: Launch of website 42 stores in Île-de-France, home delivery or removed
2009/2010: Transformation of Atac supermarkets to Simply Market
2016-2019: Transformation from Simply Market to Auchan Supermarche
From Wikipedia’s article on Simply Market, shared under CC BY-SA 4.0.4