| BBBath & Body Fusion | Rockford | IL | Chemical Manufacturing325611 | 1-19 | ◇ UNVERIFIED |
| BDBest Diamond Plastics, LLC | Chicago | IL | Plastics and Rubber Products Manufacturing326199 | 1-19 | ◇ UNVERIFIED |
| BCBestmetal Corporation | Woodstock | IL | Fabricated Metal Product Manufacturing332999 | 1-19 | ◇ UNVERIFIED |
| BHBig Horse Vineyards LLC | Lewistown | IL | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◇ UNVERIFIED |
| BTBig Thorn Brewery LLC | Georgetown | IL | Beverage and Tobacco Product Manufacturing312120 | 1-19 | ◇ UNVERIFIED |
| BBBob Barnett Ready-mix | Harrisburg | IL | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◇ UNVERIFIED |
| BUBoreded Up Productions, LLC | Rockford | IL | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |
| BMBright Metal Finishing CO | Chicago | IL | Fabricated Metal Product Manufacturing332813 | 1-19 | ◇ UNVERIFIED |
| BBBrummel Beef and Locker LLC | Rock Falls | IL | Food Manufacturing311612 | 1-19 | ◇ UNVERIFIED |
| BMBuell Manufacturing Company | Lyons | IL | Fabricated Metal Product Manufacturing332999 | 1-19 | ◇ UNVERIFIED |
| BBByers Brewing LLC | DeKalb | IL | Beverage and Tobacco Product Manufacturing312120 | 1-19 | ◇ UNVERIFIED |
| BOByer's Operating LLC | Springfield | IL | Paper Manufacturing322220 | 1-19 | ◇ UNVERIFIED |
| BIBypak, INC. | Bradley | IL | Paper Manufacturing322121 | 1-19 | ◇ UNVERIFIED |
| CPCambridge Pattern Works | Cambridge | IL | Primary Metal Manufacturing331111 | 1-19 | ◇ UNVERIFIED |
| CRCanton Ready-mix INC | Canton | IL | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◇ UNVERIFIED |
| CCCarver Custom Millworks, INC | Milan | IL | Furniture and Related Product Manufacturing337212 | 1-19 | ◇ UNVERIFIED |
| CSCentral Sheet Metal Products, INC. | Skokie | IL | Fabricated Metal Product Manufacturing332322 | 1-19 | ◇ UNVERIFIED |
| CMChicago Metal Polishing | Chicago | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| CPChicago Print Group Inc | Calumet Park | IL | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |
| CSChicago Semiconductor LLC | Barrington | IL | Computer and Electronic Product Manufacturing334413 | 1-19 | ◇ UNVERIFIED |
| CCClassic Carpentry & Finishing | Westmont | IL | Furniture and Related Product Manufacturing337110 | 1-19 | ◇ UNVERIFIED |
| CGClassic Garden Ornaments, LTD. | Pomona | IL | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◇ UNVERIFIED |
| CPClover Plastics LLC | West Chicago | IL | Chemical Manufacturing325211 | 1-19 | ◇ UNVERIFIED |
| CSCnc Swiss INC. | Addison | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| CSCoady Supply Co., INC. | Springfield | IL | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◇ UNVERIFIED |
| CPColeman Printing Company | Peoria | IL | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |
| CMCommander Machining Company, LLC | Springfield | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| CHComponent Hardware, INC. | Gilberts | IL | Fabricated Metal Product Manufacturing332510 | 1-19 | ◇ UNVERIFIED |
| CDComputer Digital Imaging, CORP. | Chicago | IL | Printing and Related Support Activities323115 | 1-19 | ◇ UNVERIFIED |
| CAConover Area Fabricators Inc | Coatsburg | IL | Fabricated Metal Product Manufacturing332312 | 1-19 | ◇ UNVERIFIED |
| CSConstruction Solutions of Chicago Inc | Villa Park | IL | Machinery Manufacturing333999 | 1-19 | ◇ UNVERIFIED |
| CTCon Temp Cabinets | North Aurora | IL | Furniture and Related Product Manufacturing337212 | 1-19 | ◇ UNVERIFIED |
| CGCorporate Graphics of America, Incorporated. | Chicago | IL | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |
| CSCorPro Screentech Services, Inc. | Loves Park | IL | Miscellaneous Manufacturing339950 | 1-19 | ◇ UNVERIFIED |
| CICraftedwild Inc. | Elk Grove Village | IL | Wood Product Manufacturing321999 | 1-19 | ◇ UNVERIFIED |
| CMC&r Metal Finishing INC | Machesney Park | IL | Fabricated Metal Product Manufacturing332813 | 1-19 | ◇ UNVERIFIED |
| CSCryogenic Systems Equipment, INC. | Blue Island | IL | Fabricated Metal Product Manufacturing332420 | 1-19 | ◇ UNVERIFIED |
| CCCustom Color Ink & Coating, Inc. | Elgin | IL | Chemical Manufacturing325998 | 1-19 | ◇ UNVERIFIED |
| CCCustom Crafted Door, INC. | El Paso | IL | Wood Product Manufacturing321911 | 1-19 | ◇ UNVERIFIED |
| CPCustom Product Innovations, Inc. | Lebanon | IL | Fabricated Metal Product Manufacturing332312 | 1-19 | ◇ UNVERIFIED |
| CWCustom Woodworks & Interiors, LTD. | Springfield | IL | Furniture and Related Product Manufacturing337110 | 1-19 | ◇ UNVERIFIED |
| DDDairy Dynamics LLC | Union | IL | Chemical Manufacturing325611 | 1-19 | ◇ UNVERIFIED |
| DPDario's Pallets, CORP. | Chicago | IL | Wood Product Manufacturing321920 | 1-19 | ◇ UNVERIFIED |
| DTDart Technology, INC. | Schaumburg | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| DLDct/precision LLC | Decatur | IL | Machinery Manufacturing333512 | 1-19 | ◇ UNVERIFIED |
| DLDe Luca Visual Solutions, Inc. | Schaumburg | IL | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |
| DIDeMarco Industrial Vaccum Corporation | Crystal Lake | IL | Machinery Manufacturing333249 | 1-19 | ◇ UNVERIFIED |
| DHDer Hotzmacher, Ltd. | Sycamore | IL | Furniture and Related Product Manufacturing337212 | 1-19 | ◇ UNVERIFIED |
| DSDiamond Screen Process Inc. | Elk Grove Village | IL | Printing and Related Support Activities323113 | 1-19 | ◇ UNVERIFIED |
| DPDKB Partners Inc dba AAA Tool and Machine Co. | O Fallon | IL | Machinery Manufacturing333318 | 1-19 | ◇ UNVERIFIED |
