It is Switzerland's third-largest supermarket chain after Migros and Coop with 11.4% market share.

In 2005 Denner acquired its rival discount chain Pick Pay.

[3] In January 2007, it was announced that Migros has purchased a majority stake in Denner.

[4] After the entrance of the worldwide-known retailers Aldi and Lidl (2004 and 2009), Denner successfully defended its leading role in the discount category.

Net sales in 2016 were 2.97 billion Swiss francs and 138.3 million purchases were registered.