Grupo Mateus

Independent, publicly traded (B3: GMAT3, IPO 2020), headquartered in São Luís (MA); no controlling parent group. Third-largest Brazilian food retailer by revenue after Carrefour/Atacadão and Assaí, and the largest retail chain in the North/Northeast per the 2026 ABRAS ranking. Its own atacarejo banner is 'Mix Atacarejo' (kept out of this catalog's Wholesale subcategory to avoid brand confusion with the main supermarket banner tracked here). No public status page found.