- Save Our Youth Chicago NFP
- Saybrook Fund Advisors, LLC
- Sb Friedman Development Advisors, LLC
- Sb Polk Street Development LLC
- Sbarro
- Sbarro
- Sbarros
- Sby Rg2-1101, LLC
- Sc Diamonds
- Scaredy Kat Oddities
- Scash
- Schmude Optical Inc, DBA Town & Country Optical Company
- Schneider Transportation Management
- School Of The Art Institute Of Chicago
- Scripps Networks, LLC
- Scripps News
- Sdi Presence LLC
- Sdlcgenix
- Sears Tower Gift Shop
- Seaspire Advisors LLC
- Second Sense
- Secure Parking Usa, LLC
- Securitas Security Services, Usa, INC.
- Security Capital Research & Management Incorporated
- Sedgwick Claims Management Services, INC.
- See Chicago Dance
- Seedos Levantine Bakery
- Seeskin Law LLC
- Segal Advisors INC
- Selbert Perkins Design
- Select Cut Steakhouse, INC.
- Selective Search Holdings, LLC
- Seminars International, Incorporated
- Senior Lifestyle Management Corporation
- Senior Lifestyle Management LLC
- Senior Suites Chicago Corporation
- Senoritas Cantina
- Sensirion INC.
- Sentinel Strategies
- Sentral
- Sentral
- Sentry Safety Solutions
- Seoulspice
- Sep Jewelry Tools Of Chicago
- Sephora # 662
- Serene Wise
- Serrano's Shoe Repair
- Sersha Jewelry & Company
- Server Central Network
- Service In Bloom INC
- Service Payment Plan, INC.
- Servicemaster Of Lakeshore
- Set In Stone Chicago, LLC
- Seven
- Seville
- Sg Cap Trading, LLC.
- Shabtai Trading, INC.
- Shadow Ball
- Shahida Amin
- Shaily's Rasoi
- Shake Shack
- Shake Shack
- Shalom Wholesale LLC.
- Shapiro + Raj
- Shared Roots Mediation
- Shatkin Arbor, LLC
- Shaw's Unlimited
- Shen Milsom & Wilke
- Shi International Corp
- Shine Box
- Shiori Advisors, LLC
- Shivani Food INC.
- Shoe Hospital
- Shoe Hospital, INC.
- Shoppertrak Rct Corporation
- Shore Capital Partners
- Shorehill Capital
- Shorenstein Realty Servicers
- Showpad, INC.
- Shriver Center On Poverty Law
- Shure Incorporated
- Siam Rice Thai Cuisine
- Siemens Industry, INC.
- Sigma Engineering, INC.
- Signoria Di Firenze, LLC
- Sila Solutions Group, INC.
- Sila's Mediterranean
- Silk Road Lasalle
- Silk Road Of Chicago
- Silk Road Rising
- Silkroad Technology, INC.
- Simon, Kucher & Partners Strategy & Marketing Consultants, LLC
- Simply Elegant Catering
- Simply Thalia
- Simpson Gumpertz & Heger, INC.
- Singh Design INC.
- Singlehop LLC
- Sisvel Us, INC.
- Site Design Group LTD
- Sixt Rent A Car, LLC
- Sixth Street Services Us, LLC
- Siyu Yu
- Sjb Advertising & Marketing
- Skechers
- Sklar & Associates,ltd
- Sku Corporation
- Sky Bird Travel & Tours, INC
- Sky Lyte Candle Co.
- Sky Ride Tap
- Skylight Body Therapy
- Skyline Asset Management LP
- Skyline Construction Il
- Skyline Headshots
- Skyway Concession Company LLC
- Sl Civic Wacker LLC
- Slack Technologies, INC.
- Slalom
- Slayton Lewis
- Slayton Search Partners
- Sleepy Hollow Immersive Experience
- Smallcakes Cupcakery
- Smallcakes Cupcakery And Creamery
- Smart Resources
- Smartdept. INC.
- Smashburger #1733
- Smb Equity LLC
- Smoothie King
- Smoothie King
- Smoque, LLC
- Snappy Painting
- Snarfs
- Sneakerhead University LLC
- Snips Media, LLC
- Sociale And Cafe Press
- Sodexo
- Sodexo America, LLC
- Sodexo@federal Reserve Bank--61029001
- Sodexomagic At Federal Reserve
- Sofi Italian
- Sol & Stone
- Solette
- Solving It International
- Somercor 504 INC
- Somes-nick & Company
- Sonder USA
- Sonic Wave Lounge
- Sophia Shao
- Sopraffina
- Sopraffina Market Cafe
- Sopraffina Marketcaffe
- Sopraffina Marketcaffe
- Soular Powered
- Soulcraft Diamonds INC.
- Soulcycle
- Soulsight, LLC
- South Branch
- South Loop Club INC
- South Loop Market
- South Loop Strength & Conditioning
- Southwest Foodservice Excellence, LLC
- Sp Murphy, INC.
- Sp Plus Corporation
- Spa Anjou
- Spa Di La Fronza Salon LTD
- Spa Nails
- Spa Nails
- Spa Pro Co
- Spaan Tech, INC.
- Spac Research
- Spanglish Mexican Kitchen INC.
- Spantree
- Spark Data, LLC
- Sparkle Gems, INC.
- Spc Educational Solutions
- Special Children's Charities
- Special Counsel, INC.
- Spectrum Communications & Consulting, INC.
- Spectrum Investors Group
- Speer Financial, INC.
- Sperco Associates, INC.
- Sperco Technology Group, LLC
- Spertus Institute For Jewish Learning And Leadership; Venue Six10
- Spinder Industries, LLC
- Spliff Society
- Sport Clips Haircuts
- Spothero
- Spr Consulting
- Sprocket Sports
- Sprout Social, INC.
- Spv Gold Valet
- Sqn Associates, LLC
- Squeeze INC.
- Srd Lobby Shop
- Srs Services Group
- Ss & C Technologies, INC.
- St Roger Abbey
- St. Regis Chicago
- St. Regis, Chicago Hotel
- Stacey-theory L.L.C.
- Stan's Donuts & Coffee