Aldi, the Germany-based discount supermarket chain, is rapidly expanding its presence in the U.S. grocery sector, posing a significant challenge to established giants like Walmart and The Kroger Company. Aldi plans to add more than 800 stores across the United States by 2028, with its growth trajectory fueled by tight cost control and a value-driven private-label approach. This expansion is forcing larger incumbents to reassess their operational flexibility and pricing strategies, especially in suburban and exurban areas where Aldi is actively gaining market share from both Walmart and other regional grocers.
Aldi's strategy starkly contrasts with those of its larger American competitors. While Walmart invests in omnichannel distribution and digital infrastructure, and Kroger focuses on loyalty programs and higher-margin categories, Aldi concentrates on essentials. The company operates smaller-format stores, limits its product assortment to under 2,000 SKUs, and boasts a private-label penetration rate exceeding 90%. This lean, price-focused model allows Aldi to make aggressive pricing moves without the same constraints faced by publicly traded grocery companies, such as balancing digital transformation, labor pressures, and shareholder expectations.
Aldi's commitment to low prices is particularly impactful. Internal studies by Aldi show its prices are 21% lower than those of its lowest-priced rivals, including Walmart. While Walmart still dominates the U.S. grocery market with a 22% share compared to Aldi's approximate 1.5% and much higher total revenue ($298 billion in U.S. revenue from 3,500 superstores), Aldi's rapid growth at 15% annually is undeniable. Market data indicates that Aldi is stealing market share from Walmart, particularly in areas with growing working-class populations. Furthermore, price comparisons show Aldi's overall pricing to be approximately 14% cheaper than Walmart, which is already 9% lower than Kroger Plus Card prices.
Walmart and Kroger are responding to this pressure. Walmart has been running price tests in 11 states, pushing vendors to undercut Aldi and other rivals by 15%, and is expected to spend around $6 billion to regain its low-price leader title. Walmart has also rebuilt its Great Value private label with cleaner packaging and broader fresh coverage, and is expanding "bettergoods," a premium private label. Kroger has expanded its Smart Way opening price line to compete. Despite these efforts, analysts confirm that Aldi maintains the lowest prices in private label consumer products in the states where it operates, and its aggressive expansion remains an existential challenge to traditional grocers.
