Mercadona, is a Spanish family-owned supermarket chain. Francisco Roig Ballester and his wife, Trinidad Alfonso Mocholi, founded the company in 1977, which began as a small butcher shop in a village in Valencia. Juan Roig assumed the role of CEO in 1981 and the company has since expanded nationwide.

In the 1990s, Juan Roig oversaw a series of changes companywide and revealed the new façade of Mercadona which was able to compete with its French competitor Carrefour and the co-operative Eroski.

Mercadona has 1,636 stores in all the 17 autonomous communities of Spain, Ceuta, Melilla and in northern Portugal. Today it holds 13.5% of Spain's total food retail space and brought in more than €508 million in profits for the 2012 fiscal year.

Mercadona was the first Spanish company to use barcodes in its stores. The system has since permitted increased monitoring of product movement, in addition to an increase in the speed of customer checkout times. Mercadona also has an automated distribution center, in the outskirts of Madrid, where computer monitors keep track of orders, while robot arms do all the work.

Mercadona aims to create products that taste as close as possible to their mainstream counterparts while keeping the costs as low as possible. Products for the wheat-intolerant at Mercadona include yogurt, instant potato for making 'tortilla', or Spanish omelet, beans, sauces, hot chocolate powder, snack mixes, sliced bread, and even iced lollies and drinkable sorbets.

According to Statista, Mercadona holds the largest share of the grocery retail market with 24.7 percent in Spain as of December 29, 2019.

According to statista and en.wikipedia