Largest Warehouses and Fulfillment Centers in 2025

The past few years have seen a surge in new warehouses across the U.S., as companies rush to build larger and more advanced facilities to keep pace with the evolving retail and e-commerce landscape. Many of these projects are true megawarehouses — massive fulfillment and distribution centers built with automation and robotics to move products quickly and reliably.

In 2025, that trend has only accelerated. Retailers, grocers, and manufacturers are opening some of their largest facilities yet — from high-tech grocery distribution centers to robotics-powered fulfillment hubs — reshaping how products move from ports and suppliers to stores and doorsteps.

In June 2025, Amazon opened a new fulfillment center in Woodburn, Oregon, its largest warehouse in the Pacific Northwest. The $500 million facility spans 3.8 million square feet, three times the size of Portland’s Lloyd Center mall, and is designed to handle tens of millions of customer orders with a mix of advanced automation and human labor.

The Woodburn site can store up to 40 million products and relies on 30 miles of conveyors, 6,000 robots, and AI-driven software to keep operations running. About 1,500 people currently work at the site, but Amazon expects that number to grow to 2,800 once fully staffed and to swell to 3,500 during the holiday season

The facility serves as a regional hub, receiving goods from long-haul trucks and moving them on to smaller warehouses in Portland, Hillsboro, and soon Redmond.

Stellantis has announced plans for a major investment in its North American logistics network with a new $388 million megahub in Van Buren Township, Michigan, scheduled to open in 2027. The site will serve as a central distribution hub for parts, consolidating several existing facilities into a single automated center.

The new hub will feature AutoStore technology, a high-density automated storage and retrieval system where robots deliver parts directly to workstations. Employees will handle the final processing and shipping, a setup aimed at improving speed, accuracy, and efficiency. Once operational, the facility will employ about 488 unionized workers represented by the UAW.

Jewelry brand Pandora is expanding its U.S. logistics network with a new 107,000-square-foot distribution center in Anne Arundel County, Maryland, set to open in the first half of 2026. The site will replace Pandora’s existing Columbia, Md., facility and increase its U.S. distribution footprint by nearly 80 percent.

The new center is being built as a state-of-the-art, LEED Silver-certified facility designed to support both retail and e-commerce channels. It will include advanced warehouse and transport management systems, with more efficient “pick-and-pass” fulfillment methods, upgraded safety features, and ergonomic workstations for employees.

This move comes as the U.S. has become Pandora’s largest and fastest-growing market. The U.S. now accounts for a significant share of Pandora’s global workforce, with around 8,000 employees and 500 stores nationwide.

In September 2025, Walmart opened a new 725,000-square-foot perishable distribution center in the Lyman area of Spartanburg County, South Carolina. The facility is part of Walmart’s nationwide investment in modernizing its supply chain, with a focus on speed and freshness for grocery delivery and in-store replenishment.

The new site is the third of five high-tech perishable centers Walmart has planned across the U.S. and will supply around 180 stores across the region with fresh produce, meat, dairy, eggs, and frozen foods. Walmart says the automated systems inside allow the center to handle more than twice the volume of a traditional distribution center.

Amazon officially opened a new 2.8 million-square-foot robotics fulfillment center in Charlton, Massachusetts, in June 2025. The four-story facility, known as ORH3, represents Amazon’s largest single investment in the state at more than $300 million.

The site houses approximately 32 million items across categories like books, electronics, toys, and housewares. Operations are powered by hundreds of robots, each capable of lifting up to 1,500 pounds, working alongside more than 1,000 employees to fulfill tens of thousands of orders daily.

Construction on the facility began in March 2022, with operations quietly starting in late 2024 before the official launch in June 2025. The project reflects Amazon’s broader push into robotics as a way to reduce manual work, increase efficiency, and accelerate order processing.

In early 2025, H-E-B opened a new 100,000-square-foot e-commerce fulfillment center in Houston, its third in the city. The facility is stocked with the same items carried in H-E-B stores and is dedicated to handling online pickup and home delivery orders across the greater metropolitan area.

Unlike many grocers that continue to rely on in-store order picking, H-E-B has been steadily building a network of standalone e-commerce facilities to support its digital growth. Since 2018, the company has opened nine dedicated fulfillment centers, each designed to reduce congestion inside stores, improve product availability, and speed up order fulfillment with the help of automation.

The new Houston site complements H-E-B’s broader expansion in the area, which also includes large-format store openings such as the 128,000-square-foot Cypress location launched in late 2024.

In April 2025, Walmart opened a 1-million-square-foot distribution center in Jacksonville, Florida, marking another major investment in its Southeast supply chain. The facility, located at 1511 Zoo Parkway near the Port of Jacksonville, is designed to service 18 Sam’s Club locations across Florida, Georgia, and South Carolina, as well as seven clubs in Puerto Rico. It also acts as a staging hub for imported goods, which are stored and sorted before being distributed to four other regional centers. The new warehouse created 250 local jobs

In July 2025, Ace Hardware opened a massive 1.5 million-square-foot retail support center in Kansas City, Missouri — the largest facility in its supply chain. At half a mile end-to-end, the center is nearly twice the size of a typical Ace distribution hub and is designed to keep the company’s 5,000 locally owned stores stocked and competitive.

The centrally located site enables faster delivery across the U.S., providing independent Ace retailers with access to the same scale and efficiency as larger chains. Advanced automation systems inside the building streamline product movement while also reducing environmental impact, according to the company.

CEO John Venhuizen described the purpose of the facility simply: “to help our locally owned stores serve their neighbors.” While Ace did not disclose the cost of the investment, executives called it a significant long-term commitment to the cooperative’s growth.

United Natural Foods, Inc. (UNFI) opened a new 1-million-square-foot distribution center in Sarasota, Florida, in September 2025, marking a major step in its multiyear plan to modernize its supply chain. The facility is the company’s first to fully integrate Pick-it-Easy robotic systems from Austrian logistics firm Knapp, which use AI to identify and grip products during order fulfillment.

The Sarasota site employs more than 400 workers and combines robotics with advanced automation that delivers products directly to employees, improving both accuracy and working conditions. UNFI says the technology will reduce operating costs while helping grocers restock faster and more reliably.

This new facility reflects UNFI’s larger “transformation agenda,” announced in 2023 after forecasting errors sharply hurt profitability. Since then, the wholesaler has been investing in automation across its network, including upgrades at sites in Centralia, Washington, and Carlisle and Manchester, Pennsylvania.

In May 2025, The Lego Group announced a $366 million investment to build a two-million-square-foot regional distribution center in Prince George's County, Virginia. The new site will support Lego’s growing North American business by shortening lead times, improving flexibility, and reducing environmental impact. The project is expected to create 305 jobs and is being backed by state incentives, including a $2.53 million grant from the Commonwealth’s Development Opportunity Fund.

The facility is scheduled to open in 2027 and will work in tandem with Lego’s new 1.7 million-square-foot manufacturing plant under construction in nearby Chesterfield, Virginia. Together, the two sites will form a production-and-distribution hub for the Americas, positioned to cut supply chain distances and strengthen Lego’s resilience against global trade disruptions.

What is considered a megawarehouse?

A megawarehouse is generally defined as a warehouse or distribution center that spans over 1 million square feet. These large facilities are designed to handle high volumes of goods and often feature automation, robotics, and advanced logistics systems.

Why are companies building more megawarehouses in 2025?

Retailers, grocers, and manufacturers are expanding their supply chains to meet the rising demand for e-commerce, speed up delivery, and reduce costs. Megawarehouses enable companies to centralize operations, increase efficiency through automation, and serve larger regions from a single location.

What companies opened or announced new megawarehouses in 2025?

What companies opened or announced new megawarehouses in 2025?
Major names include Amazon, Walmart, Macy’s, Lego, UNFI, and Ace Hardware. These companies either opened or announced new fulfillment centers and distribution hubs across the U.S., many of them over 1 million square feet.

How do fulfillment centers differ from distribution centers?

Fulfillment centers are focused on e-commerce and direct-to-consumer orders, handling picking, packing, and shipping for online customers. Distribution centers (DCs) typically serve retail stores or regional hubs, replenishing inventory in bulk.