Walmart opens Stockton fulfilment centre; third-party start date not set

Walmart opens Stockton, California, fulfilment centre on 8 October 2026

Walmart opened its fifth next-generation fulfilment centre in Stockton, California, on 8 October 2026, according to its own release of that date². The more than 900,000-square-foot facility will create more than 1,000 jobs and expand the retailer's ability to provide faster shipping and delivery across California and the West Coast². Digital Commerce 360 reported the opening on 9 October 2026 and attributed the figures to the retailer¹.

Walmart Fulfillment Services (WFS) is Walmart's end-to-end third-party fulfilment service². Walmart says WFS will also use the Stockton space to fulfil third-party Marketplace items². Digital Commerce 360 reports that this makes the opening relevant to brands and distributors selling on Walmart.com¹.

What the sources say changes for sellers, and what they do not

None of the sources reviewed states a change to inbound requirements, delivery windows or fees for WFS sellers or suppliers shipping into California^1,2,3. None gives a date for when third-party Marketplace volume begins at the site.

Under WFS, Walmart picks, packs and ships the item to the customer on the seller's behalf when an order is placed on Walmart.com. It also handles all customer support and returns for those orders³.

Walmart says that, combined with the rest of its network, its next-generation fulfilment centres will enable it to reach 95% of the US population with next- or two-day shipping². The release does not say how that applies to Stockton, and it does not set a delivery window for California sellers. It also does not mention supplier (vendor) shipments to Walmart's stores.

What the automation changes inside the building

The Stockton site uses an automated, high-density storage and retrieval system that brings products directly to associates. Walmart says this reduces the traditional 12-step fulfilment process to five steps². Digital Commerce 360 reports the same step count¹.

Walmart says the technology enables it to materially improve storage capacity and increase the number of customer orders the facility can fulfil each day, compared with a traditional fulfilment centre². The release gives no numeric figures for either measure.

Digital Commerce 360 reported that Walmart now processes more than half of its ecommerce fulfilment volume through automated facilities, according to figures it shared with investors¹. These are Walmart's own operating claims.

Walmart says it is continuing to hire a variety of positions, including tech-focused jobs, as operations ramp up². The release does not say when ramp-up will finish.

Inbound rules: what Walmart's guides say

The sources reviewed do not say whether any inbound rule was revised for the Stockton opening. The rules below are as stated in the Walmart guides reviewed, dated 24 July and 6 August 2026.

Walmart's packing guide says items must be protected in a sealed or closed container, ready for sale, and that packaging must reasonably protect the item from damage during shipping⁵. It says WFS “won't accept units that require assembly of multiple pieces by associates”⁵. Items that do not meet WFS requirements “may be corrected for an additional fee or returned at your expense”⁵.

Fragile items must be packed in a six-sided rigid box so the item is not exposed⁵.

Walmart's WFS overview lists product limits: up to 500 lb including packaging, maximum dimensions of 120 x 105 x 93 inches including packaging, no regulated or perishable items that require temperature control, and shipment from within the US or after customs clearance³.

Walmart says receiving typically takes 2 business days after a shipment arrives. Items arriving during sales events, holidays or peak months, which it defines as 1 October to 31 December, may take up to 10 business days³.

Walmart's developer documentation lists a page titled “Create an inbound shipment order”⁴, but the excerpt reviewed contains only navigation and does not set out the rules.

Fees and delivery windows

None of the sources reviewed states a change to WFS fees, supplier fees or regional delivery windows as a result of the Stockton opening.

Walmart's published WFS fee structure has no signup or monthly subscription fees. It includes a fixed monthly storage fee based on item dimensions and weight, and a fulfilment price based on dimensions and weight³. Apparel, hazardous materials, oversized items and items with low retail prices incur add-on fees, and slow-moving inventory may carry a higher storage fee during peak season³. Walmart says WFS rates “average 15% less than the competition”³.

When third-party volume starts is not announced

Walmart says the Stockton facility will fulfil third-party Marketplace items². The sources reviewed do not give a start date for that volume or say when third-party orders will begin to route to the site. Sellers should not assume Stockton will handle their WFS inventory until Walmart or Seller Center confirms it.

What sellers should do before peak season

What follows is our own advice, not Walmart's.

• Check current WFS inbound requirements in Walmart Seller Center before shipping peak inventory. Walmart's WFS overview refers to Seller Center for shipping plans and tracking³.
• Allow for receiving time. Walmart says items arriving in peak months may take up to 10 business days to process³.
• Re-check packing against the guide, especially items with loose parts that need assembly and fragile items not in a six-sided rigid box⁵.
• Ask your Walmart account or WFS contact in writing whether any inbound or fee change applies to California inventory, whether Stockton will receive third-party items, and from when.
• If you ship to Walmart as a supplier into California or the West Coast, check supplier requirements directly, because the sources reviewed do not cover supplier shipments.
• Keep copies of any written confirmation, so you can trace any change made during ramp-up.

The WFS overview was last updated on 6 August 2026³, and the packing guide on 24 July 2026⁵. We checked these pages on 11 October 2026. Walmart's rules can change, so confirm current requirements on Walmart's Marketplace Learn site before you ship. For more on Walmart's marketplace performance, see our earlier report on Walmart's US marketplace sales growth in Q2 FY27.

What is not yet known

• The go-live date for third-party Marketplace volume at Stockton.
• Whether any WFS or supplier fee changes will follow the opening.
• Whether inbound requirements or packing rules will change for facilities in California or the West Coast.
• Whether regional delivery windows will change, and for which ZIP codes.
• The actual throughput and storage gains, because Walmart has released no numeric figures.
• How, and by when, the 95% next- or two-day shipping capability will apply to California sellers¹.