- Sonoma State University
- Source Diversified, Inc.
- South Asian Bar Association Foundation
- South Asian Network
- South East Asian Assistance Center
- South Natomas Transportation Management Association
- South Valley Auto Plaza
- Southeast Asian Community Center - San Francisco
- Southern California Hospital at Culver City
- Southern California Hospital at Hollywood
- Spindrift Inn, Monterey, CA
- Sprint
- St. Agnes Medical Center
- St. Bernardine Medical Center
- St. Francis Medical Center
- St. James Church
- St. John's Pleasant Valley Hospital
- St. John's Regional Medical Center
- St. Joseph Health
- St. Joseph Hospital Eureka
- St. Joseph Hospital Kidney Transplant Center
- St. Joseph Hospital of Orange
- St. Joseph's Medical Center
- St. Jude Medical Center
- St. Louise Regional Hospital
- St. Mary Medical Center
- St. Mary Medical Center Long Beach
- St. Regis Hotel and Spa
- St. Rose Hospital
- St. Vincent Medical Center
- Stanford Healthcare
- Stanford Hospital and Clinics
- Stanford Pediatric Liver Transplant Program
- Stanford University
- Stanyan Park Hotel, San Francisco
- Stone and Youngberg LLC
- Students for Organ Donation
- Suburban Ford
- Suburban Motors
- Sundt Senior Living
- Superior Services, Inc.
- Sutter Amador Hospital
- Sutter Auburn Faith Hospital
- Sutter Davis Hospital
- Sutter Eden Medical Center
- Sutter General Medical Center Hospital
- Sutter Health Support Services
- Sutter Medical Center Sacramento
- Sutter Memorial Hospital
- Sutter Roseville Medical Center