| IBIdeal Bakery Enterprises, Inc. | Chicago | IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| IBIllinois Biodiesel CO LLC | Chicago | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| IMIllinois & Michigan Oil LLC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ITIllinois Tool Works Chronomatic | Chicago | IL | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| ICIm Crushing LLC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| IDIMMI Digital Imaging Inc | Chicago | IL | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| IUImr USA INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ITInnovative Technology & Materials INC | Chicago | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| ICInternational Casings Group, INC. | Chicago | IL | Food Manufacturing311613 | — | ◇ UNVERIFIED |
| ITInternational Truck & Engine CORP | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ISIom Svcs Bp | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| IPIowa & Pulaski Auto Body | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ISItw Shakeproof Industrial Threaded Products | Chicago | IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| JHJacob & Hefner Associates INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| JPJames Precious Metals Plating, INC. | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| JIJarck Industries, INC. | Chicago | IL | Miscellaneous Manufacturing339994 | — | ◇ UNVERIFIED |
| JPJensen Plating Works INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| JIJernberg Industries INC | Chicago | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| JIJernberg Industries, LLC Dba Aam Metal Forming | Chicago | IL | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| JMJhelsa Metal Polishing & Fabrication INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| JPJimenez Pallets, INC | Chicago | IL | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| JJJ & J Woodwork Furniture, INC. | Chicago | IL | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| JSJmc Steel Group | Chicago | IL | Electrical Equipment, Appliance & Component Manufacturing335932 | — | ◇ UNVERIFIED |
 JM Industries, LLC | Chicago | IL | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| JHJohn Hancock Ctr - American Tower | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| JRJohn R Morreale, INC. | Chicago | IL | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| JCJohnson Controls, INC. | Chicago | IL | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| JLJones Lang Lasalle Americas Il LP | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| JLJones Lang Lasalle/metlife | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| JHJRL Holdings, LLC | Chicago | IL | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| JTJ&R T.C., Inc. | Chicago | IL | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| JLJuul Labs (p&k Research) | Chicago | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| KLKanzler Landscape Contractor INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| KHKazko Holdings, LLC | Chicago | IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| KBKD Buyer LLC | Chicago | IL | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| KCK-display CORP | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| KKelloggs | Chicago | IL | Food Manufacturing311230 | — | ◇ UNVERIFIED |
| KKKennedy & Kimball Svc INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| KAKen's Amoco | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| KCKimberly Clark Chicago | Chicago | IL | Paper Manufacturing322291 | — | ◇ UNVERIFIED |
| K8King 83rd INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| KSKirby Sheet Metal Works, INC. | Chicago | IL | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| KPKms Petro Mart INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| KIKora Industries INC. | Chicago | IL | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| KFKraft Foods INC | Chicago | IL | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| LDLagomorph Design Inc | Chicago | IL | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| LSLake Street Pallet and Recycling, INC. | Chicago | IL | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| LSLamination Specialties Corporation | Chicago | IL | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| LELang Exterior, INC. | Chicago | IL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LSLangs Svc | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
