| FMFillip Metal Cabinet CO | Chicago | IL | Furniture and Related Product Manufacturing337124 | — | ◇ UNVERIFIED |
| FBFitzpatrick Bros INC | Chicago | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| FCFmc Corporation | Chicago | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| FGFoote-jones/illinois Gear | Chicago | IL | Machinery Manufacturing333612 | — | ◇ UNVERIFIED |
| FCFrederick Cooper Lamps INC | Chicago | IL | Electrical Equipment, Appliance & Component Manufacturing335110 | — | ◇ UNVERIFIED |
| FMFreeport Mcmoron Chicago Rod INC | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| FIFutura INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GCGem Coat INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GBGeneral Bandages CO | Chicago | IL | Textile Mills313310 | — | ◇ UNVERIFIED |
 General Packaging Products INC | Chicago | IL | Paper Manufacturing322221 | — | ◇ UNVERIFIED |
| General Packaging Products INC | Chicago | IL | Plastics and Rubber Products Manufacturing326111 | — | ◇ UNVERIFIED |
| GPGeorgia Pacific Corrugated Ii LLC | Chicago | IL | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| GLGoes Lithographing CO INC | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| GSGold Standard Bakery | Chicago | IL | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| GBGonnella Baking CO | Chicago | IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| GBGonnella Baking CO | Chicago | IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| GBGonnella Baking CO - South | Chicago | IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| GCGpi Converting LLC | Chicago | IL | Paper Manufacturing322212 | — | ◇ UNVERIFIED |
| GPGraham Packaging Plastic Products INC | Chicago | IL | Plastics and Rubber Products Manufacturing326160 | — | ◇ UNVERIFIED |
| GPGraham Paint & Varnish CO INC | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| GPGravure Process CO | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GMGreenway Metal Recycling | Chicago | IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| GBGreif Bros CORP Seymour & Peck Div | Chicago | IL | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| GIGtc International | Chicago | IL | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| GLGutmann Leather CO INC | Chicago | IL | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
| HDHafner Duplicating CO INC | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| HDHarbortown Division, Ibr CORP | Chicago | IL | Furniture and Related Product Manufacturing337125 | — | ◇ UNVERIFIED |
| HMHarris Marcus Furniture | Chicago | IL | Electrical Equipment, Appliance & Component Manufacturing335121 | — | ◇ UNVERIFIED |
| HMHeckett Multiserv-plant 45 | Chicago | IL | Nonmetallic Mineral Product Manufacturing327000 | — | ◇ UNVERIFIED |
| HFHenry Frerk Sons INC | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HHH H Howard CORP | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| HSHinckley Springs | Chicago | IL | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| 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 |
| 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 |
