- Sleep Inn
- Sleep Inn Jackson
- Sleep Inn, Florence
- SLEH-THI
- Slidell Memorial Hospital
- Slimfast Nutritional Foods
- Slosman Corp.
- Slovenian Savings and Loan Assoc., Franklin-Conemaugh
- SMACTIP
- Small Business School
- Small Market Meetings, Pioneer Publishing, Inc.
- Smart Brief
- SMART Caregiver Corporation
- Smart Kids Software
- SME Steel
- Smith Anderson Law Firm
- Smith Appraisals
- Smith Food and Drug
- Smith International Inc.
- Smith Street Church
- Smith Travel Research
- SmithBucklin
- Smiths
- Smoky Mountain Machining Inc.
- SMS Demag, Inc.
- SMUD
- Smurfit-Stone Container Corp - Missoula
- Smyth County Community Hospital
- Snavely Forest Products Inc.
- SNC Lavalaw
- Snechma USA
- Snelling Staffing Personnel
- Snerma USA Inc.
- SNL Coaching
- Snohomish County
- Snohomish County Council
- Snohomish County Council-District 2
- Snow Ball Foods, LLC
- Snow Cap Inn
- Snow College
- Snow Lake Lodge, West Dover VT
- Snowbird Corp.
- SOC for Biomolecular Screening
- Society for Protective Coatings
- Society for the Preservation and Encouragement of Barber Shop Quartet in America SPEBSQSA)
- Society of Actuaries
- Society of Association Executives of Puerto Rico
- Society of Consumer Affair Professionals in Business
- Society of Critical Care Medicine
- Society of Economics Geologists