Costco Wholesale Corporation—commonly known as Costco—is a membership-based warehouse club retailer headquartered in Issaquah, Washington. The company operates hundreds of large, no-frills warehouse stores globally under the “Costco Wholesale” name, offering members a remarkably broad range of brand-name merchandise at competitive wholesale prices. Costco’s unique value proposition is driven by its membership model, which generates a significant portion of its profits and supports low retail margins. The company also emphasizes private-label offerings through its Kirkland Signature brand, often outperforming even major consumer product giants in terms of sales.