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Costco Wholesale Corporation is an American multinational corporation that operates a chain of membership-only big-box warehouse club retail stores. As of 2025, Costco is the third-largest retailer in the world, and as of August 2024, the world's largest retailer of beef, poultry, organic produce, and wine, with just under a third of American consumers regularly shopping at Costco warehouses. As of 2026, Costco is ranked 12th on the Fortune 500 rankings of the largest United States corporations by total revenue. Costco originally began with a wholesale business model aimed at enrolling businesses as members, and later began enrolling individual consumers and selling products intended for them, including its own private-label brand. As of March 2026, Costco operates 924 warehouses worldwide, with 85% of them being in North America (United States, Canada, and Mexico).