Coresight: Walmart, Amazon cross major market-share milestone
Accelerating market-share consolidation among top-tier retailers has become a “defining story” of the U.S. retail competitive landscape.
That's according to new data from Coresight Research, which found that for the first time, two retailers crossed the threshold of capturing more than 10% of total U.S. retail sales. The frontrunner was Walmart, accounting for 11.08% of U.S. retail sales in 2025.
Amazon was a close second, at 10.34%, up from 8.35% in 2021 — a gain of nearly two full percentage points over four years that no other retailer comes close to matching, Coresight said. (Amazon is measured on estimated gross merchandise volume rather than revenue.)
The gap between the top two performers and the next tier is substantial, according to the report. Costco, in third place, held 3.82% of total retail sales in 2025. The company’s membership warehouse format, with its built-in loyalty economics and disciplined SKU count, continues to insulate Costco from the share erosion affecting some of its peers, noted Coresight.
Rounding out the top five for share of total retail sales are the The Home Depot and Kroger, at 2.90% and 2.82% respectively. Other market-share leaders include CVH Health, pharmacy & consumer wellness (2.66%); Walgreen, U.S. retail pharmacy (2.35%); Target (2.0%); Lowe’s Cos. (1.64%); and Albertsons Cos. (1.59%).
Other insights from the Coresight Research’s “Preview: US Retail Market Forecast and Market Share” report are below.
•Off-price and discount formats were among the more consistent market-share gainers in recent years, with several posting meaningful gains against a broader retail backdrop where most mid-tier players lost ground. Aggressive store expansion has supported sales growth at a selection of predominantly offline retailers.
•TJX Cos., Burlington Stores and Ross stores will open a little over 300 U.S. stores this year. Consensus revenue estimates indicate that these companies will exceed $100 billion in worldwide sales for the first time in 2026.
*Total retail sales growth will accelerate to a solid 4.4% in 2026, up from a 4.0% increase in 2025, taking total sales to $5.5 trillion.
The Coresight report is a preview the company’s upcoming 50-page deep dive on U.S. retailing. It will include thematic discussion, market segmentation, e-commerce data and projections, consumer data, store metrics and company revenue analysis.
