- Surgery Center, UC
- Surgical Associates
- Surgical Associates, Inc.
- Surgical Heart Transplant, Yale University of Medicine
- Surgical Specialty Hospital of Arizona
- SurModics, Inc.
- Surry Community College
- Susquehanna Health Systems
- Susquehanna Technologies
- Sussex Bank
- Sussex County Board of Supervisors
- 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
- Sutter Santa Rosa Medical Center
- Sutter Solano Medical Center
- Sutura
- Suwannee River Area Health Education Center
- SW Florida Regional Medical Center
- Swain Community Hospital
- Swainsboro-Emanuel County Chamber of Commerce
- Swan Point Yacht and Country Club, Issue MD
- Swana Solid Waste Association
- Swannanoa Valley Youth Development Center
- Swarthmore College
- SWBR Architure
- Swedish Hospital
- Swedish Match North America
- Swedish Medical Center
- Swedish Medical Center Organ Transplant Program
- Sweetwater Tavern, Centreville
- Sweetwater Tavern, Falls Church
- Sweetwater Tavern, Sterling
- Swift Company
- Swift Denim Group
- Swift Spinning Mills
- Swinerton Builders, Inc.
- Swire Coca-Cola USA
- SWLA Center for Health Services
- Sycamore Medical Center
- Sycamore Shoals Hospital
- SyCom Technologies
- Sylmar Conference Grounds
- Synagro