- Bradford Jay Harris
- Bradley Associates Limited Partnership
- Bradshaw Consultants
- Brain Injury Association Of Illinois
- Brainsurf
- Brandmuscle
- Brando's
- Braviant Consumer, LLC
- Bre 312 Skydeck
- Brewlee, LLC
- Briana Rhodes
- Brianna Jordan
- Briar Hall LLC
- Bridgeport Coffee
- Bridgeport Window Washing
- Bridges Court Reporting
- Bridget Christian Designs
- Bright Horizons
- Brighton Leadership Group
- Brightwok Kitchen
- Brightwok Kitchen
- Brightwork Financial Services, LLC
- Brilliant Solutions Group, INC.
- Brink's Global Services Usa, INC.
- Brito's Jewelry Corp
- Brixton R.e.d.
- Broadway Cafe
- Broken English Taco Pub
- Bronner Group LLC
- Brookfield Public Securities Group LLC
- Brooks Brothers # 6003
- Brown Bag Seafood Co.
- Brown Bag Seafood Co.
- Brown Bag Seafood Co.
- Brown Bag Seafood Company
- Brown Brothers Harriman & Co.
- Brownson, Rehmus & Foxworth, INC.
- Bru Chicago Wash
- Bruce & Co.,inc.
- Bryan Kilfoy Designs
- Bt Americas INC.
- Bubble&brew Corp.
- Bubblelicious Milk Tea And Fruit Tea
- Buck Development 200 LLC
- Buck Development LLC
- Buck Management Group LLC
- Buck Services LLC
- Bucketmate
- Buckingham Cleaners
- Buckingham Cleaners
- Buckingham Hotel
- Bucksbaum Retail Properties
- Buddy Guy's Legends
- Budget Rent A Car System
- Budlong Southern Chicken Hayden Hall
- Buffalo Creek Oil & Gas, LLC
- Buildcentral, INC.
- Buildcore Agency
- Building Permits
- Built In
- Bulldog Protection
- Bullocks Butters & Soy Scented Candles And More
- Bureau Pizza Co
- Burg Translation Bureau INC.
- Burger Alley Chicago
- Burger Bar Chicago
- Burger Consulting Group, INC.
- Burger King
- Burlington Coat Factory
- Burnham Park Animal Hospital
- Burnham Plaza Mart
- Burns & Mcdonnell Engineering
- Burrell Communications Group, LLC
- Burrito Beach
- Burrito Beach
- Burwood Group
- Business Sweden
- Business Wire, INC.
- Businessish
- Bwyb Products
- By The Way
- Bye Bye Chicago
- C A Jewelers Co
- C M Jeweler's
- C. C. Johnson & Malhotra, P.C.
- C.e.w Enterprise LLC
- C.z.'s INC
- C&l Printing Co.
- C&w Facility Services INC
- C2 Graphics
- Cabrera Capital Markets LLC
- Cabrera Capital Partners, LLC
- Cachefly
- Cafe Aroma De Mexico
- Cafe Deko
- Cafe Descartes Company
- Cafe Michelle
- Cafecito
- Cafecito
- Caffecafe
- Cai Food Group
- Cakes & Pastries By Lara
- Cali Jewelry Repair
- Call Me I Clean
- Call One
- Callan Associates, LLC
- Callisonrtkl INC.
- Cambria Hotel & Suites
- Cambridge Realty Capital
- Cambridge Realty Capital LTD. Of Illinois
- Cambridge Systematics INC
- Camiros, LTD.
- Candle Time Block 37
- Canna Consultants Incorporated
- Canncare, LLC
- Cantina On Madison
- Capgemini
- Capriotti's Sandwich Shop
- Capsim Management Simulations, INC.
- Captrust
- Capx Partners
- Caramagno & Associates, LTD.
- Cardno Chemrisk
- Cardozo's Pub
- Carecenter Pharmacy #2590
- Careerbuilder.com
- Careers In Nonprofits
- Cargill INC
- Caribbean Jerk Palace
- Carlson Wagonlit Travel
- Carlucci
- Carmen Lasandra Butler
- Carminati Consulting
- Carol H Williams Advertising
- Carpls
- Carr Workplaces
- Carr Workplaces
- Carranza Cleaning Service
- Cash Or Card LLC
- Casteel Coffee
- Casting House
- Castle Credit
- Castle Creek Arbitrage, LLC
- Castleark Management, LLC
- Catalpa Systems INC
- Catalyst Consulting Group
- Catch Thirty Five
- Cateloose Studio
- Cathedral Counseling Center
- Catherine M Keebler
- Cathy's Jewelry INC
- Cava Willis Tower
- Caware Purist USA LLC
- Caxy Consulting
- Cb & Son LLC
- Cbd Kratom
- Cboe Bats, LLC
- Cboe Livevol, LLC
- Cbre, INC.
- Cc Industries INC
- Ccjm Engineers, LTD.
- Ccs Inteior Design Group, INC.
- Cdm Federal Programs Corporation
- Ceco INC.
- Celadon Holdings, LLC
- Celine's Jewelry, INC.
- Cengage Learning INC
- Centaman, INC.
- Center For Confilict Resolution
- Center For Disability And Elder Law, INC.
- Central Camera Co
- Central Watch Co.
- Central Watch Service
- Centre For Sustainability And Excellence - North America, LLC
- Centrio Energy USA Holdings LLC
- Centro, INC.
- Century Aluminum Company
- Century City Baths, LLC
- Ceres Cafe
- Cerise
- Ces Travel Ga INC
- Cfi Partners, LLC
- Cg Parking
- Chaloner Associates, INC.
- Champs # 15074
- Chandler Cleaners &tailor, LLC
- Changing Worlds
- Channing Capital Management
- Chapman Strategic Advisors LLC
- Chapmans Jewelry
- Charles Sweet Brands LLC
- Charles Tyrwhitt
- Chas. Engelhart Company, INC.
- Chazzel Construction INC.
- Cheiron, INC.
- Chen Site Design Studio LLC
- Chengdu Bistro Chicago
- Cherry Bekaert Advisory LLC
- Cheryl Hurst
- Chesas Bistro & Bar