Investitor web portal has published a list of the largest supermarket chains in the world: Headquarters: Bentonville, Arkansas, USA Overview: Walmart is the world's largest retailer by revenue, operating over 11,000 stores under multiple brands in 27 countries. It offers a wide range of products, including groceries, electronics, clothing and household items. Key advantages: Low prices, wide store network and strong supply chain management.

Headquarters: Issaquah, Washington, USA Overview: Costco is a membership-based warehouse system that offers a wide selection of merchandise, including groceries, electronics and bulk merchandise, at competitive prices. It operates in over 800 locations worldwide. Key benefits: Membership model, bulk purchasing and high-quality private label products.

Headquarters: Cincinnati, Ohio, USA Overview: Kroger is one of the largest supermarket chains in the United States, operating over 2,700 stores under various brands. It offers a wide range of products, including groceries, pharmacy services and general merchandise. Key strengths: Wide store network, strong private label brands and focus on fresh food.

Headquarters: Essen and Mullheim, Germany Overview: Aldi is a global discount supermarket chain with over 10,000 stores in 20 countries. Known for its low prices and efficient operations, Aldi offers a limited range of high-quality products, primarily private labels. Key strengths: Cost-effectiveness, focus on private label and international pres.