| 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 |
| ALAnthony Liftgates INC | Pontiac | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| APArlington Plating CO | Palatine | IL | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ 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 |
| 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 |
| 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 |
| 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 |
| ETEklind Tool CO | Franklin Park | IL | Fabricated Metal Product Manufacturing332216 | 100-499 | ◐ 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 |
| GEG E Mathis | Chicago | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| HHHausner Hard Chrome | Elk Grove Village | IL | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| IHIndustrial Hard Chrome LTD | Geneva | IL | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| LFLarson Forgings | Chicago | IL | Fabricated Metal Product Manufacturing332111 | — | ◐ LIKELY ACTIVE |
| LMLaystrom Manufacturing CO. | Chicago | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MOMorgan Ohare INC | Addison | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| NPNobert Plating CO | Chicago | IL | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| PCParsons CO INC | Roanoke | IL | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| PPPerfection Plating INC | Elk Grove Village | IL | Fabricated Metal Product Manufacturing332813 | 100-499 | ◐ LIKELY ACTIVE |
| PPPrecision Plating CO | Chicago | IL | Fabricated Metal Product Manufacturing332813 | 100-499 | ◐ LIKELY ACTIVE |
| RSRockford Spring CO | Rockford | IL | Fabricated Metal Product Manufacturing332613 | 20-99 | ◐ LIKELY ACTIVE |
| RCRollex CORP | Elk Grove Village | IL | Primary Metal Manufacturing331524 | 100-499 | ◐ LIKELY ACTIVE |
| RPRovanco Piping System Inc-treatment Plant | Joliet | IL | Fabricated Metal Product Manufacturing332996 | 20-99 | ◐ LIKELY ACTIVE |
| SISwd INC | Addison | IL | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| SSSwenson Spreader CO | Lindenwood | IL | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| TITc Industries | Crystal Lake | IL | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| TCThyssenkrupp Crankshaft CO | Danville | IL | Fabricated Metal Product Manufacturing332111 | 100-499 | ◐ LIKELY ACTIVE |
| TATower Automotive Operations USA I LLC | Chicago | IL | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| UCUS Chrome CORP of Illinois | Kingston | IL | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| WTWauconda Tool & Engineering | Algonquin | IL | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| WMWieland Metals INC | Wheeling | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| ZCZenith Cutter INC | Loves Park | IL | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| AEAble Electro-polishing CO | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| AIAgri-fab INC | Sullivan | IL | Fabricated Metal Product Manufacturing332119 | 100-499 | ◐ LIKELY ACTIVE |
| ASAlco Spring Industries INC | Chicago Heights | IL | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| BTBruder Tank | Sullivan | IL | Fabricated Metal Product Manufacturing332420 | 100-499 | ◐ LIKELY ACTIVE |
| BCBunn-o-matic CORP | Springfield | IL | Fabricated Metal Product Manufacturing332999 | 500+ | ◐ LIKELY ACTIVE |
| BCBway CORP | Chicago | IL | Fabricated Metal Product Manufacturing332431 | — | ◐ LIKELY ACTIVE |
| CMCapron Mfg Co-capron P/t | Capron | IL | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| CECircuit Engineering LLC | Elk Grove Village | IL | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| CRClad Rex LLC | Franklin Park | IL | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| CRCmc Rebar - Belvidere | Belvidere | IL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| CSCmc Steel Fabricators INC Dba Cmc Paving Solutions | Kankakee | IL | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |