| AMAllied Metal CO | Chicago | IL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| EPElastomer Processing Group - Chicago | Chicago | IL | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| RCRyerson Coil Pickling | Chicago | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| VPVcna Prairie Illinois INC Yard 1005 | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BBBimbo Bakeries USA | Chicago | IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| BSBio Star Films LLC | Chicago | IL | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| COCudner & O'connor CO | Chicago | IL | Chemical Manufacturing325910 | 1-19 | ◇ UNVERIFIED |
| FUFervalue USA INC | Chicago | IL | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| LILang Ice CO | Chicago | IL | Beverage and Tobacco Product Manufacturing312113 | 20-99 | ◇ UNVERIFIED |
| OFOriginal Ferrara INC | Chicago | IL | Food Manufacturing311812 | 1-19 | ◇ UNVERIFIED |
| PIPace Industries INC | Chicago | IL | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| AFAbbey Finishing CORP | Chicago | IL | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| APAce Plating CO | Chicago | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ADAction Disposal | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ARAction Rack & Mfg CO | Chicago | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ACAdjustable Clamp CO | Chicago | IL | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| AMAdm Milling CO | Chicago | IL | Food Manufacturing311211 | — | ◇ UNVERIFIED |
| APAero Plating Works | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| AFA Finkl & Sons CO | Chicago | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| AUAirgas USA LLC | Chicago | IL | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAkers Packaging Service INC | Chicago | IL | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| ARA-korn Roller INC | Chicago | IL | Machinery Manufacturing333998 | — | ◇ UNVERIFIED |
| ABAl-amir Bakery INC D/b/a Sanabel Bakery | Chicago | IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| AHAllied Hastings Barrel Drum Service | Chicago | IL | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| AKAltman & Koehler Foundry CO INC | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| ARAltman Ron | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| AAlumetco | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| APAmber Plating Works INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| AAAmcor American Metal Chem CORP | Chicago | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ADAmerican Decal & Mfg CO | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| AMAmerican Midwest Chrome Plating & Polishing | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| APAmerican Precision Castings INC | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| ARAmerican Rack CO | Chicago | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ASAmerican Sugar Refining INC | Chicago | IL | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| ATAmerican Thiessen LLC | Chicago | IL | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
 American Wilbert Vault CORP | Chicago | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| AMAmes Metal Products CO | Chicago | IL | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| AAnderson | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ADApco Deburring & Polishing INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| APApollo Plastics | Chicago | IL | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AAAppetizers and INC | Chicago | IL | Food Manufacturing311412 | — | ◇ UNVERIFIED |
| ACArchibald Candy Company | Chicago | IL | Food Manufacturing311330 | — | ◇ UNVERIFIED |
| ASArchitectural Specialty Products INC | Chicago | IL | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| ATArmstrong Tools INC | Chicago | IL | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| AFAtk Foods INC | Chicago | IL | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| AWAt&t Wireless Navy Pier-water | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ABAuto Bumper House & Parts INC | Chicago | IL | Paper Manufacturing322221 | — | ◇ UNVERIFIED |
| AIAwmco INC | Chicago | IL | Nonmetallic Mineral Product Manufacturing327120 | — | ◇ UNVERIFIED |
| AAztec | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BPBarnes Plating CORP | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
