An unrivalled advantage. Own brands directly contribute to every Group format's performance – i.e. sales and operating margins. This gives us. Casino Group competitive positions in Asia. Casino Group: Leader in Retail in South America. Casino Group competitive positions in Europe. Groupe Casino (or Casino Guichard-Perrachon) is a French mass retailer with operations around the world. The company is listed on the NYSE Euronext Paris History · Positioning and strategy · International markets · Brands.