| IEIDEX Energy AFS - Wheeling | Wheeling | IL | Machinery Manufacturing333913 | 1-19 | ◐ LIKELY ACTIVE |
| IIllinois | Saint Charles | IL | Chemical Manufacturing325910 | 1-19 | ◐ LIKELY ACTIVE |
| IIllinois | St. Charles | IL | Chemical Manufacturing325910 | 1-19 | ◐ LIKELY ACTIVE |
| IIllinois | Aurora | IL | Miscellaneous Manufacturing339950 | 1-19 | ◐ LIKELY ACTIVE |
| ISIllinois South Suburban General | Mokena | IL | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| IIIpsen, Inc. Pecatonica | Pecatonica | IL | Machinery Manufacturing333994 | 1-19 | ◐ LIKELY ACTIVE |
| JJackson | Chicago | IL | Food Manufacturing311340 | 1-19 | ◐ LIKELY ACTIVE |
| JWJMA Wireless Chicago | Chicago | IL | Computer and Electronic Product Manufacturing334220 | 1-19 | ◐ LIKELY ACTIVE |
| JCJohnson County Highway Department | Vienna | IL | Machinery Manufacturing333120 | 1-19 | ◐ LIKELY ACTIVE |
| JTJuno Therapeutics - Libertyville | Libertyville | IL | Chemical Manufacturing325414 | 1-19 | ◐ LIKELY ACTIVE |
| KEKamps Elwood | Elwood | IL | Wood Product Manufacturing321920 | 1-19 | ◐ LIKELY ACTIVE |
| LILaFox IL | Elburn | IL | Chemical Manufacturing325180 | 1-19 | ◐ LIKELY ACTIVE |
| LLemont | Lemont | IL | Plastics and Rubber Products Manufacturing326130 | 1-19 | ◐ LIKELY ACTIVE |
| LALenze Americas - Schaumburg | Schaumburg | IL | Machinery Manufacturing333612 | 1-19 | ◐ LIKELY ACTIVE |
| LILibertyville, IL | Libertyville | IL | Computer and Electronic Product Manufacturing334419 | 1-19 | ◐ LIKELY ACTIVE |
| LLincolnshire | Lincolnshire | IL | Miscellaneous Manufacturing339116 | 1-19 | ◐ LIKELY ACTIVE |
| LLisle | Lisle | IL | Computer and Electronic Product Manufacturing334220 | 1-19 | ◐ LIKELY ACTIVE |
| LRLittle Rock Wilbert Burial Vault | Decatur | IL | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| MRMacLean-Fogg Richmond | Richmond | IL | Fabricated Metal Product Manufacturing332722 | 1-19 | ◐ LIKELY ACTIVE |
| MMMacLean - Mallard IC | Sterling | IL | Machinery Manufacturing333922 | 1-19 | ◐ LIKELY ACTIVE |
| MOMain Office | Elk Grove Village | IL | Machinery Manufacturing333995 | 1-19 | ◐ LIKELY ACTIVE |
| MMarengo | Marengo | IL | Electrical Equipment, Appliance & Component Manufacturing335312 | 1-19 | ◐ LIKELY ACTIVE |
| MMarseilles | Marseilles | IL | Wood Product Manufacturing321999 | 1-19 | ◐ LIKELY ACTIVE |
| MMarshall | Marshall | IL | Fabricated Metal Product Manufacturing332439 | 1-19 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear Des Plaines | Des Plaines | IL | Machinery Manufacturing333613 | 1-19 | ◐ LIKELY ACTIVE |
| MAMasters & Alloy | Alsip | IL | Primary Metal Manufacturing331491 | 1-19 | ◐ LIKELY ACTIVE |
| MRMattoon Ready Mix | Mattoon | IL | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| MLMazzella Lifting Technologies (Granite City) | Granite City | IL | Fabricated Metal Product Manufacturing332618 | 1-19 | ◐ LIKELY ACTIVE |
| MMcLean | Mclean | IL | Wood Product Manufacturing321999 | 1-19 | ◐ LIKELY ACTIVE |
| MBMidwest Blow Molding LLC | Vandalia | IL | Machinery Manufacturing333111 | 1-19 | ◐ LIKELY ACTIVE |
| MSMillipore Sigma Distribution | Kankakee | IL | Chemical Manufacturing325412 | 1-19 | ◐ LIKELY ACTIVE |
| MMMold-Tech Midwest | Carol Stream | IL | Fabricated Metal Product Manufacturing332812 | 1-19 | ◐ LIKELY ACTIVE |
| MMonmouth | Monmouth | IL | Primary Metal Manufacturing331210 | 1-19 | ◐ LIKELY ACTIVE |
| MCMoultrie County Ready Mix | Sullivan | IL | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| MMpp | Chicago | IL | Food Manufacturing311340 | 1-19 | ◐ LIKELY ACTIVE |
| NENaperville-3mus-il Elmo Tech | Naperville | IL | Miscellaneous Manufacturing339113 | 1-19 | ◐ LIKELY ACTIVE |
| NFNaperville Field Office | Naperville | IL | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| NINascote Industries - Mockingbird 3 | Nashville | IL | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| NHNew Hudson Facades - IL | Chicago | IL | Fabricated Metal Product Manufacturing332323 | 1-19 | ◐ LIKELY ACTIVE |
| NJNexpera Joliet | Channahon | IL | Chemical Manufacturing325180 | 1-19 | ◐ LIKELY ACTIVE |
| NANORTH AMERICAN STAINLESS-Minooka | Minooka | IL | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| NBNoTrax Bedford Park | Bedford Park | IL | Plastics and Rubber Products Manufacturing326299 | 1-19 | ◐ LIKELY ACTIVE |
| NSNRE Silvis | Silvis | IL | Transportation Equipment Manufacturing336510 | 1-19 | ◐ LIKELY ACTIVE |
| NBNSA Belleville | Belleville | IL | Electrical Equipment, Appliance & Component Manufacturing335999 | 1-19 | ◐ LIKELY ACTIVE |
| NFNuway Fab | Troy | IL | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| OIOakley Industrial Machinery INC. | Elk Grove Village | IL | Machinery Manufacturing333994 | 1-19 | ◐ LIKELY ACTIVE |
| ONOakley - Normal | Normal | IL | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| OTOrd - T1 | Chicago | IL | Food Manufacturing311340 | 1-19 | ◐ LIKELY ACTIVE |
| ODOttawa Dental Laboratory, LLC - Chicago Location | Chicago | IL | Miscellaneous Manufacturing339116 | 1-19 | ◐ LIKELY ACTIVE |
| ODOttawa Dental Laboratory, LLC - Wheaton Location | Wheaton | IL | Miscellaneous Manufacturing339116 | 1-19 | ◐ LIKELY ACTIVE |