Vendors - S
- S. C. Anderson Inc.
- San Fernando Valley Girl Scout
- San Fernando Valley Pallet Company
- San Joaquin Chemicals Inc.
- Santa Catalina Island Co. d/b/a Two Harbors Enterprises
- Sartorius Corporation d/b/a Denver Instrument
- SAS Institute Inc.
- SBC Communications Inc.
- Schermeister, Phil
- SCMH Inc. / Southern California Material Handling - Caterpillar
- Scott Health & Safety / Tyco Safety Products
- Scott Sound
- Scoutware, LLC
- Screamline Investment Corporation d/b/a Tour Coach Transportation
- Self Stik Labels Inc.
- Sempra Energy and Southern California Gas Company
- Sequoia Concepts Inc. / Sequoia Financial Services
- SGD Enterprises dba Four Seasons Landscaping
- Shaw Contract Flooring Services Inc. d/b/a Spectra Contract Flooring
- Shivarayan Inc. d/b/a Speed Pro Signs Plus - Paul Muru
- Show Gear Productions Inc.
- Shred-It USA c/o HUB International Illinois
- Siemens Building Technologies, Inc.
- Siemens Water Technologies Corp
- Sierra School Equipment Company
- Simplex Grinnell / Simplex Time Recorder Company
- Sinclair Printing & Litho Inc.
- Skaug Truck Body Works
- SKC - West Inc.
- SMS - Systems Maintenance Services
- So Cal Fitness Servive Inc.
- So Cal Tractor Sales Inc.
- Software Shelf International Inc.
- Sony Electronics
- South Coast Industrial Door, Inc.
- Southern California Boiler Inc. d/b/a Central Boiler
- Southern California Boiler Inc. d/b/a Central Boiler
- Southwest Coatings Inc.
- Southwinds School Activity Service d/b/a Southwinds Transportation
- Spectris Inc. Including Bruel & Kjaer North America
- SPG Holdings d/b/a Sagon-Phior
- Sport Chalet
- Sprint Spectrum L.P.
- Stan A. Huber Consultants Inc.
- Standard Register Company
- Stanley Works
- Starwood Hotels & Resorts Worldwide dba Sheraton Universal Hotel, Universal City, Ca
- Stelter Company
- Ste-Man Inc.
- Stericycle, Inc.
- Steris Corporation
- Stonefire Grill Inc.
- Student Voice LLC
- Studio City Custom Frame
- Studio City Music, Inc.
- Suburban Propane Partners Inc.
- Sumal Management Inc. d/b/a Subway
- Sun Microsystems, Inc.
- Sun-Ex Venetian Blind Company
- Sunbelt Equipment & Rentals (formerly Northridge Equipment Rentals)
- Superior Scientific Inc.
- SuperShuttle International Inc. aka SuperShuttle Los Angeles
- Susan Sheppard d/b/a Sheppard Associates
- System One Business Products Inc.
- Systems Technology Associates Inc.