Amazon recently announced that Prime Day 2026 will be held simultaneously in June on more than 20 major marketplaces worldwide, including core markets such as the US, UK, Germany, and France, while the Japanese marketplace will be postponed to July. For cross-border sellers, this not only means an earlier start to the promotional period but also a simultaneous increase in pressure regarding inventory preparation, warehousing, and fulfillment.
Prime Day has always been considered one of the most important sales events of the year for cross-border e-commerce. According to official Amazon data, during Prime Day 2025, global Prime members purchased over 300 million items, with several categories breaking sales records. As the scale of the event continues to expand, logistics fulfillment capabilities have become a crucial factor affecting store rankings, conversion rates, and customer experience.
Against this backdrop, US overseas warehouses are gradually shifting from an "optional" to a "standard" for more and more sellers.
The earlier start of Prime Day further compresses the window for sellers to prepare inventory.
Compared to previous years, the overall timing of Prime Day this year is significantly earlier. For sellers, the biggest change is not just the event date, but the need to plan the entire operational chain in advance.
Typically, shipping from China to a US FBA warehouse via sea freight can take 20-40 days, and during peak seasons, issues such as port congestion, booking delays, and warehouse overload are common. If restocking isn't timely, sellers can easily miss the Prime Day traffic surge.
Amazon has also been continuously strengthening its inventory management in recent years. For example, Amazon has repeatedly emphasized inventory turnover efficiency and implemented stricter management of warehouse capacity and inefficient inventory. This means that sellers who still rely entirely on the FBA model will face greater uncertainty during major sales events.
Therefore, more and more sellers are adopting a dual-warehouse model of "FBA + overseas warehouse": leveraging FBA for Prime traffic and delivery advantages, while using US-based overseas warehouses for stocking, transshipment, and replenishment, improving overall fulfillment flexibility. This model is especially important during major sales events.
US overseas warehouses are becoming a "buffer zone" for cross-border sellers.
For concentrated, explosive events like Prime Day, logistical stability directly impacts order conversion rates and store performance.
The core value of US overseas warehouses is mainly reflected in the following aspects:
Advance inventory preparation reduces peak season logistics risks
Sellers can ship goods in bulk to local US warehouses in advance, avoiding the impact of rising international logistics prices and delivery time fluctuations during peak seasons. When FBA inventory is insufficient, it can be quickly replenished, reducing the risk of stockouts. This advantage is particularly pronounced for categories with high transportation requirements, such as large items, heavy goods, and pure electrical products.
Improved last-mile delivery efficiency
Consumers' demands for delivery speed are constantly increasing. Data shows that, according to Amazon's "2025 Small Business Empowerment Report," fast delivery remains one of the key factors influencing consumer orders. Using local overseas warehouses for dropshipping can effectively shorten delivery time, improve user experience, and increase repurchase rates. For sellers on platforms such as TikTok Shop, TEMU semi-managed, and SHEIN semi-managed, local fulfillment capabilities are also becoming one of the platform's key performance indicators.
More efficient returns and relabeling
Cross-border returns have always been a pain point for many sellers. If returned goods are directly sent back to China, it is not only costly but also time-consuming. Using US overseas warehouses for return inspection, relabeling, and restocking can effectively reduce losses and improve the efficiency of secondary sales of inventory. Especially during the peak return period after Prime Day, localized processing capabilities directly impact cash flow efficiency.
Beyond Prime Day, multi-platform sellers also need local warehousing capabilities.
It's worth noting that the value of US overseas warehouses is no longer limited to Amazon. In recent years, platforms such as TEMU, TikTok Shop, and SHEIN semi-managed warehouses have developed rapidly, and their requirements for local shipping and fulfillment timeliness are increasing. Especially after the continued expansion of TikTok e-commerce in the US market, more and more sellers are starting to adopt a "one inventory, multi-platform sales" model.
This means that sellers not only need warehousing capabilities but also local warehousing services that can simultaneously connect to multiple platform systems. It is precisely under this industry trend that more and more cross-border sellers are beginning to focus on more stable and flexible third-party overseas warehousing services.
Why are more and more sellers choosing U-Speed US overseas warehouses?
For sellers preparing for Prime Day and those operating on multiple platforms, overseas warehouses not only need "warehouses," but more importantly, they need system support, timeliness, and operational capabilities.
U-Speed currently operates two major overseas warehouses in the US, located in the East and West coasts, to meet the order fulfillment needs of different regions. It supports semi-managed fulfillment for platforms such as SHEIN, TEMU, and TikTok, and can handle various types of goods including general merchandise, electronics, and cosmetics.
Regarding warehousing efficiency, a key concern for cross-border sellers, U-Speed's US overseas warehouses cover 20,000 square meters and have a daily parcel handling capacity of up to 100,000 pieces, better managing peak order periods such as Prime Day.
Furthermore, its US overseas warehouse dropshipping system is integrated with platforms such as TEMU, TikTok, SHEIN, and AE, supporting platform order pushes and facilitating order synchronization, reducing manual workload.
In actual operation, many sellers prioritize stability. U-Speed uses its proprietary WMS warehouse management system, supporting multi-platform API integration, and ensuring real-time synchronization of inventory and order data. The warehouses are managed by a Chinese team, with standardized SOP processes to improve inbound and outbound accuracy and delivery time stability.
For returns, U-Speed supports return and replenishment services, completing relabeling and data upload within 48 hours to help sellers quickly resell goods and reduce inventory losses.
In addition, the warehouse is equipped with light and heavy-duty shelving, forklifts, PDAs, electronic scales, 24-hour monitoring, and fire safety facilities to meet the warehousing needs of different types of goods.
Intensified competition during major sales events means cross-border logistics capabilities are determining growth ceilings.
The earlier timing of this year's Prime Day indicates an accelerating pace of competition in cross-border e-commerce. For sellers, the future competition will not only focus on product selection and operations but also on supply chain and fulfillment capabilities. Especially in the US market, consumers are increasingly demanding faster delivery times, better return experiences, and more stable local fulfillment. Those who can establish local warehousing infrastructure earlier will have a greater advantage in Prime Day and throughout the peak season.
For sellers looking to operate on platforms such as Amazon, TikTok Shop, TEMU, and SHEIN, a stable, efficient, and responsive US overseas warehouse is becoming a crucial infrastructure for cross-border business growth.
