| HSHinckley Springs | Chicago | IL | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| HBHobson Brothers INC | Chicago | IL | Computer and Electronic Product Manufacturing334417 | — | ◇ UNVERIFIED |
| HIHoughton International INC | Chicago | IL | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| HEHrr Enterprises INC | Chicago | IL | Food Manufacturing311613 | — | ◇ UNVERIFIED |
| IBIdeal Box CO | Chicago | IL | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| IBIl Bell Telephone CO Dba At&t Illinois | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| IBIl Bell Telephone CO Dba At&t Illinois | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| IMIllinois Meat CO | Chicago | IL | Food Manufacturing311611 | — | ◇ UNVERIFIED |
| IPImage Packaging | Chicago | IL | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| IPIngersoll Products | Chicago | IL | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| IEInglot Electronics CORP | Chicago | IL | Electrical Equipment, Appliance & Component Manufacturing335311 | — | ◇ UNVERIFIED |
| IMInjecto Mold INC | Chicago | IL | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| IMInjecto Mold INC | Chicago | IL | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| IIInnophos INC | Chicago | IL | Chemical Manufacturing325131 | — | ◇ UNVERIFIED |
| IPInternational Paper | Chicago | IL | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| IIInx International Ink CO | Chicago | IL | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| JAJacobs Anodizing | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| JMJavo Mex Corporation | Chicago | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| JFJays Foods INC | Chicago | IL | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| JPJensen Plating Works INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| JMJlo Metal Products INC | Chicago | IL | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| JFJoe & Frank's Homemade Sausages CO | Chicago | IL | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| JEJonas Enterprises INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| JMJoslyn Manufacturing CO | Chicago | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| JMJoslyn Mfg - Electrical Apparatus Div | Chicago | IL | Electrical Equipment, Appliance & Component Manufacturing335931 | — | ◇ UNVERIFIED |
| JCJp Custom Metal Finishing | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| JMJp Morgan Chase | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| KCK-5 Construction CORP | Chicago | IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| KGKap Graphics INC | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| KPKappa Products CORP | Chicago | IL | Food Manufacturing311223 | — | ◇ UNVERIFIED |
| KLKeywell LLC | Chicago | IL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| KCK-five Construction CO | Chicago | IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| KPKnight Packing Group INC | Chicago | IL | Paper Manufacturing322212 | — | ◇ UNVERIFIED |
| KMKoch Material CO | Chicago | IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| KCKorex Chicago LLC | Chicago | IL | Chemical Manufacturing325000 | — | ◇ UNVERIFIED |
| KLKrel Laboratories INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| LCLa-capannina-coffee/alacavannia Coffee | Chicago | IL | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| LCLa Casa Del Pueblo | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| LPLake Point Foods INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| LLLakeside Lithography LLC | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| LELakewood Engineering & Mfg CO | Chicago | IL | Machinery Manufacturing333412 | — | ◇ UNVERIFIED |
| LGLakin General CORP | Chicago | IL | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| LGLakin General CORP - Roller Division | Chicago | IL | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| LSLamination Specialties | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| LILang Ice CO | Chicago | IL | Beverage and Tobacco Product Manufacturing312113 | — | ◇ UNVERIFIED |
| LPLashore Press INC | Chicago | IL | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| LPLiberty Photo Engraving CO | Chicago | IL | Printing and Related Support Activities323122 | — | ◇ UNVERIFIED |
| LILifoam Industries LLC | Chicago | IL | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| LPLuster Prod INC | Chicago | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| MOMarine Oil Terminal | Chicago | IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
