| CFCerro Flow Products LLC | Sauget | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| CMCharter Manufacturing CO INC | Woodstock | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CCColeman Cable INC | Waukegan | IL | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| CSCorey Steel CO | Cicero | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| ESElgiloy Specialty Metals | Hampshire | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| HSHanna Steel CORP | Pekin | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HWHorning Wire CORP | Lake Zurich | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| MCMaclean-fogg Component Systems | Mundelein | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MIMetal-matic INC | Bedford Park | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MIMidland Industries INC | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| MCMueller CO | Decatur | IL | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| MCMueller CO | Decatur | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NENehring Electrical Works CO | Dekalb | IL | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
| NTNucor Tubular Products INC | Marseilles | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| PAPrecision Aluminum - Foundry Division | Rock Island | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| RRRock River Fabrications | Lyndon | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SPSims Precious Metals | Franklin Park | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| UEUniversal Electric Foundry INC | Chicago | IL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| UMUniversal Metal Service CORP | South Holland | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| WMWh Maze CO | Peru | IL | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| WRWieland Rolled Products NA - East Alton Casting Plant | East Alton | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| BCBillco CORP | Addison | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| GLGreat Lakes Precision Tube, INC. | Aurora | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| ASArlington Structural Steel | Arlington Heights | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| TCTricast/presfore CORP | Crystal Lake | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| APAlcast- Peoria | Peoria | IL | Primary Metal Manufacturing331524 | 100-499 | ◐ LIKELY ACTIVE |
American Aluminum Extrusion HQ (Roscoe IL) | Roscoe | IL | Primary Metal Manufacturing331316 | 100-499 | ◐ LIKELY ACTIVE |
| ADAndy's Deli & Mikolajczk | Chicago | IL | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| BFBatavia Foundry & Machine CO | Batavia | IL | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| BIBehr Iron & Metal | Rockford | IL | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| BTBluewater Thermal Solutions - Chicago 3 | Melrose Park | IL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| CDCharter Dura-bar, INC. | Woodstock | IL | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| CChemetco | Hartford | IL | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
Chicago Magnesium Casting CO | Blue Island | IL | Primary Metal Manufacturing331524 | — | ◐ LIKELY ACTIVE |
| CWChicago White Metal Castings, INC. | Bensenville | IL | Primary Metal Manufacturing331523 | 100-499 | ◐ LIKELY ACTIVE |
| CSClingan Steel INC. | Elk Grove Village | IL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| CICoilplus IL | Plainfield | IL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| CECom Ed - United Scrap Metal INC | Cicero | IL | Primary Metal Manufacturing331420 | — | ◐ LIKELY ACTIVE |
| CLCurto Ligonier Foundries CO | Melrose Park | IL | Primary Metal Manufacturing331524 | — | ◐ LIKELY ACTIVE |
| DCDuro Cast | Somonauk | IL | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| EBE.h. Baare CORP | Robinson | IL | Primary Metal Manufacturing331222 | — | ◐ LIKELY ACTIVE |
| EMExcel Machine Technology, INC. | Elk Grove Village | IL | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| FIFarmweld INC. | Teutopolis | IL | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| IEIms-amco Engineered Products LLC | Des Plaines | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| JEJet Enterprises & Holding CO LLC | Sauget | IL | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| LIL&n Industries | Rushville | IL | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| MEMagnesium Elektron North America | Madison | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| MLMaruichi Leavitt Pipe & Tube | Chicago | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| MRMid-States Recycling & Refining | Des Plaines | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| MAM.s. Action Machining CORP | Mchenry | IL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |