Costco Stock Falls Amid Amazon's Expansion of Same-Day Grocery Delivery

Amazon is expanding its same-day grocery delivery service to over 1,000 cities and towns, increasing competition for Costco in the fresh grocery and household staples market. Costco shares are trading lower as a result, potentially losing customers to Amazon's added convenience of same-day delivery for Prime members.

Amazon (NASDAQ:AMZN) has announced a significant expansion of its same-day grocery delivery service, a move that is likely to intensify competition in the fresh grocery and household staples market, particularly for Costco. The e-commerce giant has revealed that over 1,000 cities and towns in the United States now offer same-day delivery for fresh groceries, with plans to expand this service to over 2,300 cities by the end of the year [1].

This expansion includes the introduction of thousands of perishable food items such as produce, dairy, meat, seafood, baked goods, and frozen foods. Amazon Prime members can now order these items alongside millions of other items, including electronics, fashion, and home and garden products, and have everything delivered to their doorstep within hours [1].

The convenience of same-day delivery for perishable items has been well-received by customers in regions like Phoenix, Orlando, and Kansas City. Amazon Prime members can enjoy free same-day delivery for orders over $25, while non-Prime members can choose the service for a $2.99 fee [1].

The expansion is part of Amazon's broader strategy to compete with other grocery delivery services such as Walmart+ (WMT) and Instacart (CART). Walmart has also been investing heavily in its delivery services, aiming to offer delivery within three hours to 95% of the U.S. population by the end of the year [2]. This increased competition is likely to impact the market share of established retailers like Costco, which has traditionally focused on bulk purchasing and high-quality products.

Costco shares have traded lower in response to this news, potentially due to concerns about losing customers to Amazon's added convenience. Amazon's ability to offer same-day delivery for a wide range of products, including perishable items, could attract price-sensitive and convenience-seeking shoppers who might otherwise opt for Costco's bulk offerings [1].

Amazon's investment in expanding its delivery network, including a $4 billion commitment to bring same-day and next-day delivery services to rural areas, underscores its commitment to making grocery delivery more accessible [2]. This move is likely to reshape the competitive landscape in the grocery sector, with implications for retailers and consumers alike.

References:
[1] https://seekingalpha.com/news/4484645-amazon-rocks-the-grocery-sector-with-a-major-expansion-of-its-same-day-delivery-service-that-includes-perishable-food
[2] https://www.tradingview.com/news/reuters.com,2025:newsml_L1N3U50EZ:0-amazon-adds-perishable-foods-to-same-day-delivery-to-take-on-instacart-walmart/