Founders Of Top 50 Supermarkets Founder of Walmart Founder: Sam Walton Year of Formation: 1962 Additional Context: Sam Walton opened the first Walmart Discount City store in Rogers, Arkansas, which eventually grew into the world’s largest retailer. Founder of Costco Founders: James Sinegal and Jeffrey Brotman Year of Formation: 1983 Additional Context: Costco started as […]