- Uintah School District
- UK Healthcare
- Ukiah Valley Medical Center
- Ukrop's Super Markets, Inc.
- Ultradent Products, Inc.
- Ultrasound Diagnostic School
- ULTREX
- UM Capital Region Medical Center
- UM Prince George's Hospital Center
- UMass Amherst Residential Life Student Services
- UMass Memorial - HealthAlliance Hospital
- Umass Memorial HealthAlliance-Clinton Hospital
- UMASS Memorial Medical Center - Memorial Campus
- UMASS Memorial Medical Center - University Campus
- Umatilla County
- UMBC
- UMDNJ
- UNC - TV
- UNC Caldwell
- UNC Hospital Hillsborough Campus
- UNC Medical Center
- UNC Medical Center Transplant Care
- UNC Rex Healthcare
- UNC Rex Holly Springs Hospital
- UNC Rockingham Health Care
- UNC-A Literature and Language
- UNC-TV
- Underwood's Landscaping
- Ungerboeck Systems International, Inc.
- Uni Boring Company, Inc.
- Uni-First
- UNI-Solar
- Unicoi County Hospital
- Unicomm, LLC
- UNICUS Incorporated
- Unified Government of Wyandotte County
- Unifirst
- Unifocus
- Union Bank and Trust Credit Administration
- Union Center National Bank
- Union County
- Union County
- Union County Board of Commissioners
- Union County Care Committee
- Union Hospital
- Union Hospital
- Union Hospital
- Union Pacific Railroad
- Union Planters Corp
- Union Switch and Signal