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- Shauna Heltzel
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- Shawarman, Corp.
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- Shepherd Outsourcing, LLC
- Sheree Hoffman
- Shereen Gerrasch
- Sheridan Hair Salon
- Sheridan Plumbing & Sewer, INC.
- Sherloq Financial
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- Sherri Cooper
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- Shield Hvac Solutions LLC
- Shikara
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- Shiv Chibber
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- Show Services, INC.
- Showalter Roofing Services, INC.
- Shrimpys Cajun Seafood Kitchen
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- Shyora Tolbert
- Siam House
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- Signature Flight Support
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- Sihyun Ha
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- Silva Refrigeration INC.
- Silver Hill Capital, LLC
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- Simm Associates, INC.
- Simon's Agency, INC.
- Simon's Design Hardwood Flooring
- Simon's Heating & A C
- Simone Bells
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- Simply Removal Incorporated
- Sinbad's Castle Arcade Limited
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- Sitco Systems INC
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- Sitepro Services INC.
- Six Points Market
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- Sk Heating & Cooling Corp.
- Sk Hvac INC.
- Skokie Valley Air Control INC
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- Skyway Cement Company LLC
- Skyway Yacht Works
- Sls Consulting, INC.
- Sls Energy Solutions
- Sm Heating & Cooling Corp.
- Smart Choice Hvac
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- Smart Solutions Heating & Cooling, INC
- Smarte Carte INC
- Smarty Of Illinois
- Smb Contracting INC .,
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- Smith Training Solutions
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- Sn Servicing Corporation
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- Sno Daze Tropical Sno
- Snobbish LLC
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- So Ill Apparel And Decals, LLC
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- Social Que South Loop LLC
- Sofoklis Vasiliades
- Sofy' S Construction LLC
- Sol Chimney Sweep
- Sola Salon Studios
- Solartech Heating & Air Conditioning INC.
- Solid Platforms INC
- Solidarity Enterprises LLC
- Solutions Mechanical
- Solux Med Spa
- Solvent Plus LLC
- Solvent Point LLC
- Sonia Ponce
- Sonifi Solutions, INC.
- Sonitrol Chicago North
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- Sonja Metcalf
- Sonja Roper
- Sonora Dogz
- Sorto's Climate Solutions, LLC
- Sorto's Temperature Control, INC.
- Soul & Smoke Vin # 1f64f5kn7n0a04806 Plate 187403f
- Soul Kantina
- Soul Reviver LLC
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- South Side Material Co
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- Southeast Toyota Finance
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- Southwood Financial LLC
- Sovain Mechanical
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- Sp Curations
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- Spanailsupply Chicago INC.
- Sparks Exteriors
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- Spartemp , LLC
- Spaulding Decon
- Specialized Loan Servicing LLC
- Speedy G Towing Service, INC.
- Speedy Gonzalez Painting INC
- Spencer Dunn
- Spicy Desi Chicago
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- Spoiled Tummy LLC
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- Sprintax, INC.
- Sprovieri's Custom Counters
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- Stacey Hibler
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