- Source One
- South Beach Tanning
- South Carolina Bank and Trust
- South Carolina Electric & Gas
- South Central Bank
- South Central District
- South China Restaurant
- South Florida Jewelry Buyers
- South Florida Pediatric Partners
- South Florida Water Management District
- South Mississippi Homecare & Hospice
- South of the Border
- South Pacific Rehabilitation Services
- South Park Apartments
- South Park Welding Supplies
- South Pointe Apartments
- South Side Auto
- South Texas Dental
- South Western Communications
- Southbank
- Southbridge Savings Bank
- Southeast Alabama Gas District
- Southeast Head Start
- Southeast Service Corporation
- Southeast Wyoming Mental Health Center
- Southeastern Bank
- Southeastern Equipment
- Southeastern Printing
- Southeastern Telecom
- Southern Accents
- Southern Air
- Southern Assisted Living
- Southern Auto Brokers
- Southern Auto Parts
- Southern Auto Sales
- Southern Automotive
- Southern Bank & Trust
- Southern Bank and Trust Company
- Southern Builders