Lidl, Dia, and Consum lead the growth, but Mercadona remains the undisputed Spanish leader

Lidl, Dia, and Consum have solidified their position as the chains that have gained the most market share in Spain during the first eight months of 2026. Although Mercadona continues to lead the sector with 27.4%, the three discount chains have made significant gains in a market marked by economic uncertainty.

Lidl, Dia, and Consum: winners of changing consumer habits

According to data presented by Worldpanel by Numerator, Mercadona has seen a slight decline in shoppers (-0.8 percentage points), but maintains its dominance thanks to the strengthening of its private label, despite losing ground in key categories such as large shopping baskets and families with children—areas traditionally dominated by the retailer.