- Upper Dublin Friends Meeting
- Urban Media Labs Inc
- Vascular Disease Intervention
- VIP Laboratories
- Vision Lens Express Inc
- Visscher Labs Div Of Technical
- Vista Lab Technologies
- Vita-Med Laboratories LTD
- Wang Xi MD Path & Lab Medicine
- Water Laboratory Grants Pass
- Weather Info Line-Ponca City
- Weather Lab
- West Unity Waste Water Lab
- Wyeast Laboratories
- Wyeth-Ayerst Laboratories
- Wyle Labs
- X Cell Labortories
- Xeron Clinical Laboratories
