| BABuilders Asphalt LLC | Algonquin | IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BABuilders Asphalt LLC | Elk Grove Village | IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BSBuilders Sand & Cement CO | Silvis | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BPBuilding Products CORP | Belleville | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BWBulaw Welding | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| BMBull Moose Tube CO | Chicago Heights | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| BNBunge North America INC | Cairo | IL | Food Manufacturing311224 | — | ◇ UNVERIFIED |
| BNBunge North America INC | Old Shawneetown | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| BNBurgess Norton Mfg CO | Dekalb | IL | Machinery Manufacturing333112 | — | ◇ UNVERIFIED |
| BFBurkart Foam INC | Cairo | IL | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| BCBurpee CO | Cary | IL | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| BABusiness Advisors Dba Entech Fabrications | Posen | IL | Machinery Manufacturing333993 | 1-19 | ◇ UNVERIFIED |
| BLBusse LLC | Mt Prospect | IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BMButler Manufacturing CO | Galesburg | IL | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| BCBway Corporation | Chicago | IL | Fabricated Metal Product Manufacturing332431 | — | ◇ UNVERIFIED |
| BPBway Packaging | Franklin Park | IL | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| BWB & W CORP | Bensenville | IL | Furniture and Related Product Manufacturing337214 | — | ◇ UNVERIFIED |
| CICabery, Il | Cabery | IL | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| CMCabot Microelectronics CORP | Aurora | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CCCaddell Construction | Rockford | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CCCadie Car Hauling | Belvidere | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CPCalco Plating CO | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| CPCalibrated Power Solutions | Marengo | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CMCallen Manufacturing CORP | Northlake | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| CACalumet Armature & Electric LLC | Riverdale | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| CLCalumet Lubricants CO LP | Burnham | IL | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| CRCalumet River Terminal | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CGCameron Great Lakes | Batavia | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CICamryn Industries LLC | Belvidere | IL | Transportation Equipment Manufacturing336320 | — | ◇ UNVERIFIED |
| CCCandy & CO | Chicago | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CCCandy & CO | Chicago | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CPCannon Precision Manufacturing | Keithsburg | IL | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CECapitol Engineering & Manufacturing CO | Harvey | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| CWCapitol Wholesale Meats | Chicago | IL | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| CLCapstone Logistics | Joliet | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CPCarbit Paint CO | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| CCCardinal Colorprint Printing | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| CHCardinal Health Logistics Center | Channahon | IL | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| CRCardinal Red-e-mix | East Moline | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CRCardinal Red-e-mix CO | Carbon Cliff | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCargill-decatur | Decatur | IL | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| CICargill INC | Goodfield | IL | Food Manufacturing311111 | — | ◇ UNVERIFIED |
| CICargill INC | Flora | IL | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| CMCargill Meat Solutions Corporation, Swift Pork Company | Beardstown | IL | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| CICarlith Il | Carpentersville | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| CSCarri Scharf Materials INC | Bartonville | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CLCarr Lumber & Manufacturing CO | Bedford Park | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CCCartex CORP | Addison | IL | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CCCarus Chemical CO | Ottawa | IL | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| CCCase CORP | East Moline | IL | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
