Costco Wholesale Corporation operates a chain of membership-only big-box warehouse club retail stores. As of 2025, Costco is ranked 12th on the Fortune 500 rankings of the largest United States corporations by total revenue. Costco is known for providing quality, brand-name merchandise at substantially lower prices than typically found at conventional wholesale or retail sources. The company's warehouses are designed to help small- to medium-sized businesses reduce costs in purchasing for resale and for everyday business use, while individuals can also purchase for their personal needs.