- Savoy Medical Center
- Sawgrass Marriott Golf Resort and Spa
- Saxonburg Coffee & Tea
- SBC - Houston
- SBC - San Antonio
- SCCI Hospital, Lima
- Scenic Bluffs Community Health Center
- Schack-Findlay Honda
- Schemmer Associates
- Schenck Price Smith and King
- Schering-Plough
- Schering-Plough Corp.
- Schipul Technologies Inc.
- Schneck Medical Center
- Schneider Downs and Company Inc.
- Schneider Regional Medical Center
- ScholarOne, Inc
- Scholastic, Inc
- School District of Oakfield
- School Employees Lorain County Credit Union
- School Nutrition Association
- School of Public Health at the University at Albany
- School Sisters of Saint Francis
- Schooley Mitchell Telecom Consultants
- Schooley Mitchell TelecomConsultants of Chatham-SBS
- Schowalter Villa
- Schuck and Sons Construction Co.
- Schulman, Ronca, and Bucuualas, Inc.
- Schumaker Lighting, Inc.
- Schuyler Hospital
- Schuylkill Medical Center
- Schuylkill Medical Center South
- Schuylkill United Way
- Schwans Bakery, Inc.
- Schwarzschild Jewelers
- Schwenckfeld Manor Apartments
- Science and Engineering Associates
- Science Care
- Scientific Applications and Research Associates, Inc.
- Scientific Applications and Research Associates, Inc. - Colorado Office
- Scientific Equipment and Furniture Association
- Scientific Testing Laboratories, Inc.
- Scion Cardio-Vascular
- Scios, Inc.
- SCODE
- Scotland Memorial Hospital
- Scott A. Leckman MD, Office of
- Scott and Stringfellow Inc.
- Scott Insurance
- Scott Regional Hospital