U: 76 stores

• U.S. Navy Memorial Store
• UFC
• UGG
• UK2 Group
• ULTA
• UMI
• UNEEDIT.com
• UPrinting
• US Appliance
• US Armorment
• US Cavalry
• US Medical Supplies
• US Olympic Shop
• US Outdoor
• US Search
• US Toy
• USA Canvas Art
• USA Florist
• USA TODAY
• USA Western Wear
• USABride.com
• USbeds.com
• USinsurance.com
• USpets
• UberPrints
• Ubid
• UgradShop
• Uh Medical Supply
• Ulla Popken
• Ultimate Back Store
• The Ultimate Green Store
• Ultimate Paintball
• Ultimate Wine Shop
• Ultra Diamonds
• Ultra Fragrances
• UltraHosting
• Ultralingua
• UnbeatableSale
• Uncle Sams
• UnclesGames.com
• Uncorked.com
• Under Armour
• Undergear
• Underground Station
• Uniform City
• Union Diamond
• Union Pen Company
• Unique Glass Works
• Unique Soles
• Unique Squared
• Unique Vintage
• UniquePearl.com
• United Vacations
• Universal Sports
• Universal Studios Hollywood
• University of Nebraska Press
• Uno Alla Volta
• Up and Riding
• UpDown
• Upper Deck
• Upscale Lighting
• Upurea
• The Urban Armory
• Urban Minx
• Urban Original
• Urban Outfitters
• Urban Posters
• Urban Scooters
• Urinozinc
• Us Weekly
• Userful.com
• Utrecht
• Utsav
• Uxsight.com
• usa4ink.com
• usamallmasters