Costco Wholesale Corporation operates a membership-based warehouse retail model offering a curated selection of products at scale. The company sells groceries, consumer goods, electronics, appliances, and seasonal items through large-format warehouse locations and online platforms. Costco was founded by James Sinegal and Jeffrey Brotman and is known for its focus on operational efficiency, limited product assortment, and membership-driven revenue. The company generates income from both merchandise sales and annual membership fees. Costco operates warehouses across multiple countries, adapting its product mix to local markets while maintaining a consistent operating model. The company emphasises supply chain efficiency, private-label products, and vendor partnerships. Costco’s leadership oversees merchandising, logistics, and international expansion initiatives.