- UCSF - University of California San Francisco
- UCSF Benioff Children's Hospital Oakland
- UCSF Fresno Medical Education Program
- UCSF Health, Transplant Services
- UCSF Mission Bay
- UCSF School of Denistry
- Ukiah Valley Medical Center
- ULTREX
- UNI-Solar
- Union Pacific Railroad
- United Way Bay Area
- United Way of Imperial County
- United Way of Indian Wells Valley
- United Way of Kern County, Inc.
- United Way of Merced County
- United Way of Nevada County
- United Way of Northern California
- United Way of San Diego County
- United Way of San Joaquin County, Inc.
- United Way of San Luis Obispo County
- United Way of Santa Cruz County
- United Way of the Inland Valleys
- United Way of the Wine Country
- United Way of Tulare County
- United Way of Ventura County
- United Way Silicon Valley
- University of California - San Francisco
- University of California - Santa Cruz
- University of California San Francisco Medical Center
- University of California San Francisco Tissue Bank
- University of California-Davis
- University of California-San Francisco UCSF), Department of MedicineDGIM)
- University of Redlands
- University of the Pacific
- URS Corporation
- USC Norris Comprehensive Cancer Center
- USC Verdugo Hills Hospital
- USCF Health
- USI Connects
- VA Loma Linda Healthcare System
- VA Long Beach Healthcare System
- VA Palo Alto Health Care System
- Vaden High School
- Valley Children's Hospital
- Valley Presbyterian Hospital
- Van Dyke Fabrication
- VANIR
- Vascular Architects
- Ventura County Medical Center
- Vibra Hospital of Sacramento