TGT — Target Corporation

Amazon is the world's largest online retailer and a dominant cloud computing provider through Amazon Web Services (AWS). The company also operates a massive advertising business, Prime Video streaming, Whole Foods grocery, and various devices (Alexa, Kindle, Ring).

Walmart is the world's largest retailer by revenue, operating over 10,500 stores and clubs globally. The company has been aggressively growing its e-commerce and advertising businesses while maintaining its core position as the low-price leader in groceries and general merchandise.

Costco operates a chain of membership-only warehouse clubs selling bulk goods at the lowest possible prices. With its Kirkland Signature private label and fiercely loyal member base, Costco has one of the most unique and defensive business models in retail.

Dollar Tree operates two value retail chains: Dollar Tree (fixed price-point stores) and Family Dollar (multi-price discount stores). The company acquired Family Dollar in 2015 for $8.5 billion in a controversial deal that has underperformed expectations, leading to write-downs and strategic reviews. Dollar Tree is now considering separating or selling Family Dollar to focus on its higher-performing core banner. Both chains serve value-oriented consumers seeking everyday essentials at low prices, appealing particularly to lower-income households.

Dollar General is the largest dollar store chain in the United States by store count with over 19,000 locations, primarily serving small and rural communities that lack convenient access to large supermarkets or discount retailers. The company's stores are small (typically 9,000 sq ft) and stocked primarily with consumable goods including food, health and beauty products, cleaning supplies, and seasonal merchandise at low price points. Dollar General has been expanding into fresh produce and DG Market format to capture more grocery spending.