| AFAdvanced Filtration Systems INC | Champaign | IL | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| AAldrich-apl | Urbana | IL | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| AAAlpha Assembly Solutions INC | Itasca | IL | Chemical Manufacturing325199 | 100-499 | ◐ LIKELY ACTIVE |
| AHAmerican Highway | Kankakee | IL | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| AMAmerican Metal Fiber INC | Lake Bluff | IL | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| ANAmerican Ntn Bearing Mfg CORP | Elgin | IL | Fabricated Metal Product Manufacturing332991 | 500+ | ◐ LIKELY ACTIVE |
| AEAnamet Electrical INC | Mattoon | IL | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| ABAnchor Brake Shoe CO | West Chicago | IL | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| ALAnthony Liftgates INC | Pontiac | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| ACApollo Colors INC | Rockdale | IL | Chemical Manufacturing325130 | 20-99 | ◐ LIKELY ACTIVE |
| AMArdent Mills LLC | Alton | IL | Food Manufacturing311211 | 100-499 | ◐ LIKELY ACTIVE |
| APArlington Plating CO | Palatine | IL | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| ARAtlas Roofing CORP | East Moline | IL | Plastics and Rubber Products Manufacturing326140 | 20-99 | ◐ LIKELY ACTIVE |
| ATAtlas Tube INC | Chicago | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| AGAzz Galvanizing-joliet | Joliet | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| AGAzz Galvanizing Peoria | Peoria | IL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| BABci Acrylic | Libertyville | IL | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| BCB. C. Mathews CO. | Crystal Lake | IL | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| BWBernard Welding | Beecher | IL | Machinery Manufacturing333992 | 100-499 | ◐ LIKELY ACTIVE |
| BTBluewater Thermal Solutions-rockford | Rockford | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| BSBradley Services INC | Morton | IL | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| BCBrewster Cheese CO | Stockton | IL | Food Manufacturing311513 | 20-99 | ◐ LIKELY ACTIVE |
| CPCarbit Paint CO | Melrose Park | IL | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| CWCardwell Westinghouse | Chicago | IL | Transportation Equipment Manufacturing336510 | 20-99 | ◐ LIKELY ACTIVE |
| CMCci Manufacturing Illinois CORP | Lemont | IL | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| CPChampion Packaging & Dist INC | Woodridge | IL | Chemical Manufacturing325612 | 100-499 | ◐ LIKELY ACTIVE |
| CSChicago Steel Container CORP | Chicago | IL | Fabricated Metal Product Manufacturing332439 | 20-99 | ◐ LIKELY ACTIVE |
| CIChromium Industries LLC | Chicago | IL | Fabricated Metal Product Manufacturing332410 | 1-19 | ◐ LIKELY ACTIVE |
| DPDanfoss Power Solutions (us) CO | Freeport | IL | Machinery Manufacturing333995 | 100-499 | ◐ LIKELY ACTIVE |
Daubert Cromwell, LLC | Alsip | IL | Paper Manufacturing322220 | — | ◐ LIKELY ACTIVE |
| DLDriv - Lok INC | Sycamore | IL | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| DCDs Containers INC | Batavia | IL | Fabricated Metal Product Manufacturing332111 | 100-499 | ◐ LIKELY ACTIVE |
| DADutch American Foods | Beecher | IL | Food Manufacturing311999 | 100-499 | ◐ LIKELY ACTIVE |
| ETEklind Tool CO | Franklin Park | IL | Fabricated Metal Product Manufacturing332216 | 100-499 | ◐ LIKELY ACTIVE |
| EIElgin Industries | Elgin | IL | Food Manufacturing311911 | 20-99 | ◐ LIKELY ACTIVE |
| FLFiberteq LLC | Danville | IL | Nonmetallic Mineral Product Manufacturing327211 | 20-99 | ◐ LIKELY ACTIVE |
| FAFic America CORP | Carol Stream | IL | Fabricated Metal Product Manufacturing332116 | 500+ | ◐ LIKELY ACTIVE |
| FGForge Group Star LLC | Freeport | IL | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| FFFrigid Fluid CO | Northlake | IL | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| FLFuchs Lubricants CO | Harvey | IL | Petroleum and Coal Products Manufacturing324191 | 100-499 | ◐ LIKELY ACTIVE |
| GGatesair | Quincy | IL | Computer and Electronic Product Manufacturing334220 | — | ◐ LIKELY ACTIVE |
| GAGcp Applied Technologies INC | Bedford Park | IL | Petroleum and Coal Products Manufacturing324121 | 20-99 | ◐ LIKELY ACTIVE |
| GEG E Mathis | Chicago | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| GDG&m Die Casting CO INC | Wood Dale | IL | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| GBGold Bond Building Products LLC | Waukegan | IL | Nonmetallic Mineral Product Manufacturing327420 | 20-99 | ◐ LIKELY ACTIVE |
| GEGold Eagle CO | Chicago | IL | Petroleum and Coal Products Manufacturing324191 | 100-499 | ◐ LIKELY ACTIVE |
Grayhill INC | La Grange | IL | Computer and Electronic Product Manufacturing334418 | — | ◐ LIKELY ACTIVE |
| HHHausner Hard Chrome | Elk Grove Village | IL | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| HEHella Electronics CORP | Flora | IL | Transportation Equipment Manufacturing336320 | 100-499 | ◐ LIKELY ACTIVE |
Hentzen Coatings INC | Batavia | IL | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |