- Warehousing & Storage, Wilmington - Warehouse Services
- Waste & Refuse Services & Sites, Wilmington
- Waste Container Rental, Wilmington
- Waste Management, Waste Sanitation & Safety Equipment, Wilmington
- Water & Utility Related Industrial Equipment, Wilmington
- Water Filters & Purification Systems, Equipment & Supplies, Wilmington - Water Filtration Systems Companies
- Water Testing Labs, Wilmington
- Welding & Welder, Wilmington - Welding Supplies, Machines, Equipment, Services & Contractors
- Window & Blind Cleaning, Wilmington
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- Windows, Wilmington - Single & Double Hung, Casement, Sliding, Glass Block, Basement Windows & More
- Windows and Doors, Wilmington - Wholesale, Manufacturers & Suppliers
- Wines - Wholesale, Wilmington
- Wines, Brandy & Brandy Spirits, Wilmington
- Wire Conduit & Cable, Wilmington
- Wire, Cable & Rope, Wilmington
- Wireless & Cellular Communications Equipment & Supplies, Wilmington
- Wrecking & Demolition Contractors, Wilmington - House & Building Demolition Companies
- Writing Services, Wilmington
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