U
- UnHide
- Ubiquiti
- Universal Store
- UWorld
- UGA Bookstore
- University of Nebraska Lincoln Bookstore
- U-Haul
- UYN SPORTS
- UPERFECT
- Ultima Replenisher
- Utoya Organics
- Unagi Scooters
- Unibuyplus
- Uahpet
- Urban Beard
- Unionbay
- Ultahost UK
- UPPER Bag
- Utimi
- Utopiat
- UTA Bookstore
- Udacity
- Udemy
- UNGER-FASHION.COM
- Ulike
- UND Bookstore
- UTSA Bookstore
- Under 510
- UK Breakaways
- UrthBox
- University of Cincinnati Bookstore
- University of Florida Bookstore
- University of Miami Bookstore
- Urban Outfitters UK
- Unify Health Lab
- Urban Planet
- Ultimate Ears
- Upper 90
- Urban Originals
- Unreal Fur