| KWKrazy Wills | Rockford | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| LTLeavitt Tube Co., LLC | Northbrook | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| LMLouis Meskan Brass Foundry, INC. | Chicago | IL | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| LLLyon LLC | Paris | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| MMMagnus Metal INC | East Peoria | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MMMan-sea Metal, INC. | Mount Zion | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MAMapes and Sprowl Steel, LTD. | Elk Grove Village | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MMMarble Machine, INC. | Danville | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| MGMarion Gardner Jr | Dennison | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| MMMaster Machine & Repair Corporation | Bedford Park | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MFMercedes Fabricating, INC. | Chicago Heights | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| MRMerdian Rail Products CORP | Cicero | IL | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| MPMetal Partners Rebar, LLC | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MRMetal Resource INC. | Hinsdale | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MIMgf Industries | Rockford | IL | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| MIMid-state Industries Operating, INC. | Arcola | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| MZMidwest Zinc-hillsboro INC | Hillsboro | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| MCModern Custom Casting | Rockford | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| MWMoffat Wire & Display, INC. | Addison | IL | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| MWMomentum Wheels & More | Petersburg | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| MTMonski Tool* | Elmhurst | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| NMNational Material CO | Elk Grove Village | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| NMNational Material Processing, LLC | Chicago | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| NPNational Processing Company | Chicago | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NPNew Process Steel - Nps | Alsip | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| NVNew Vermillion Iron Works, INC. | Hoopeston | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NPNorthern Partners Cooperative | Mendota | IL | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| NSNorthwestern Steel & Wire CO | Rock Falls | IL | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| PDParagon Die Casting CO | Chicago | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| PAPenn Aluminum Industries | Murphysboro | IL | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| PAPetersen Aluminum Corporation Dba Pac-clad | Elk Grove Village | IL | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| PSPoffy's Scrap Metal | Shannon | IL | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| PMPrecious Metal Refining Services Inc/progressive Env Svcs | Wauconda | IL | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| PWP & W Foundry, INC. | Plano | IL | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| QCQuad City Die Casting CO | Moline | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| QTQuadrant Tool and Manufacturing Company | Schaumburg | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RERepublic Engineered Steel, INC | Naperville | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| RCRockbridge Castings | Rockbridge | IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SCSandwich Casting and Machine | Sandwich | IL | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| SMS&n Manufacturing & Stl, INC. | Peoria | IL | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| SCSouthwire CO | Flora | IL | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| SLSpartan Light Metal Products / Team Tech | Sparta | IL | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| STStarbrite Technologies Inc., | South Chicago Heights | IL | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| TSThornton Salvage | Kankakee | IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| TMThyssenkrupp Materials NA | Bolingbrook | IL | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| TDTop Die Casting CO | Marengo | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| TMTransMachine MTT Inc. | Aurora | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| UHUltimate Highway Sales, INC. | Palos Heights | IL | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| UPUltra Play Systems, INC | Red Bud | IL | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| USUnited States Aluminum CORP. | Cicero | IL | Primary Metal Manufacturing331319 | — | ◇ UNVERIFIED |
