| AMAllied Metal CO | Chicago | IL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MIMidland Industries INC | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| UEUniversal Electric Foundry INC | Chicago | IL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| AFA Finkl & Sons CO | Chicago | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| AKAltman & Koehler Foundry CO INC | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| ARAltman Ron | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| AAlumetco | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| APAmerican Precision Castings INC | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| AMAmes Metal Products CO | Chicago | IL | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| CDCentral Die Casting | Chicago | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| CSCentral Steel & Wire CO | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| CAChicago Aluminum Castings CO INC | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| FCFederal Chicago CORP | Chicago | IL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| FMFreeport Mcmoron Chicago Rod INC | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| KLKeywell LLC | Chicago | IL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MDModern Die Casting CORP | Chicago | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| RMReserve Marine Terminal | Chicago | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| SASmall Assemblies INC | Chicago | IL | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| SISpecialloy INC | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| UAUnited American Metal | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| UDUS Diecasting INC | Chicago | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| USUS Steel - Gary Works | Chicago | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| WFWagner Foundry INC | Chicago | IL | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| AMAllied Metal CO | Chicago | IL | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| ASAmazon.com Svcs LLC | Chicago | IL | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| ACAnderson Casting Co., INC. | Chicago | IL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| ATArcher Tinning and Re-tinning | Chicago | IL | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| BFBrumund Foundry INC | Chicago | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| CSCharter Steel Trading | Chicago | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| CVChicago Vacuum Castings CORP | Chicago | IL | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| CCCopperweld Chicago Division | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| FNFrancis & Nygren Foundry CO | Chicago | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GIGrand Iron Work INC. | Chicago | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| HDHeick Die Casting CORP | Chicago | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| JIJernberg Industries INC | Chicago | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| KTKazmier Tooling Inc., | Chicago | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| LBLeitelt Brothers Foundry, INC | Chicago | IL | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| LMLouis Meskan Brass Foundry, INC. | Chicago | IL | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| MPMetal Partners Rebar, LLC | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NMNational Material Processing, LLC | Chicago | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| NPNational Processing Company | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OKO & K American CORP. | Chicago | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| PDParagon Die Casting CO | Chicago | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| WMWheeling Metal Processing, LTD. | Chicago | IL | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ZIZekelman Industries Wheatland Tube CO | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
