| AAAlpha Assembly Solutions INC | Itasca | IL | Chemical Manufacturing325199 | 100-499 | ◐ LIKELY ACTIVE |
| AHAmerican Highway | Kankakee | IL | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| ABAnchor Brake Shoe CO | West Chicago | IL | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| ATAtlas Tube INC | Chicago | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| AGAzz Galvanizing Peoria | Peoria | IL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| CPCast Products INC | Norridge | IL | Primary Metal Manufacturing331522 | 100-499 | ◐ LIKELY ACTIVE |
Combined Metals Company LLC - Hampshire | Hampshire | IL | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| CLCurto Ligonier Foundries CO | Melrose Park | IL | Primary Metal Manufacturing331524 | 1-19 | ◐ LIKELY ACTIVE |
| DFDecatur Foundry, INC. | Decatur | IL | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| GDG&m Die Casting CO INC | Wood Dale | IL | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| GLGreat Lakes Precision Tube, INC. | Aurora | IL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| IZImperial Zinc CORP | Chicago | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| IDInland Die Casting INC | Wheeling | IL | Primary Metal Manufacturing331521 | 100-499 | ◐ LIKELY ACTIVE |
| LILemfco INC | Galena | IL | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| LIL&n Industries INC | Rushville | IL | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| MBMeskan Brass Foundry | Chicago | IL | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| MIMidland Industries INC | Chicago | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| MIMorton Industries LLC | Morton | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| NPNaylor Pipe CO | Chicago | IL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| POPeerless of America INC | Effingham | IL | Primary Metal Manufacturing331316 | 20-99 | ◐ LIKELY ACTIVE |
| PTPtc Tubular Products LLC | Fairbury | IL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| RCRollex CORP | Elk Grove Village | IL | Primary Metal Manufacturing331524 | 100-499 | ◐ LIKELY ACTIVE |
| SMSoudan Metals Company INC. | Chicago | IL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| TMTazewell Machine Works INC | Pekin | IL | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| TDTop Die Casting CO | South Beloit | IL | Primary Metal Manufacturing331521 | 100-499 | ◐ LIKELY ACTIVE |
| TFTrio Foundry Inc | Montgomery | IL | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
Tri-star Metals LLC | Freeport | IL | Primary Metal Manufacturing331222 | 100-499 | ◐ LIKELY ACTIVE |
| UWUnified Wire and Cable, INC. | Dekalb | IL | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| VFVermont Foundry CO | Vermont | IL | Primary Metal Manufacturing331522 | 20-99 | ◐ LIKELY ACTIVE |
| WTWheatland Tube CO - Chicago Div | Chicago | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| WMWieland Metals INC | Wheeling | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| ASArlington Structural Steel | Arlington Heights | IL | Primary Metal Manufacturing331111 | 1-19 | ◐ LIKELY ACTIVE |
| BIBerkshire Investments LLC Dba Chicago Extruded Metals Company | Cicero | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| HWHorning Wire CORP | Lake Zurich | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| MMMaass Midwest Manufacturing INC | Huntley | IL | Primary Metal Manufacturing331529 | 1-19 | ◐ LIKELY ACTIVE |
| MIMetal-matic INC | Bedford Park | IL | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| OKO & K American CORP. | Chicago | IL | Primary Metal Manufacturing331111 | 100-499 | ◐ LIKELY ACTIVE |
Quality Metal Finishing | Byron | IL | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| RFRockford Foundries | Rockford | IL | Primary Metal Manufacturing331524 | 1-19 | ◐ LIKELY ACTIVE |
| SLState Line Foundries INC | Roscoe | IL | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| WMWh Maze CO | Peru | IL | Primary Metal Manufacturing331222 | 1-19 | ◐ LIKELY ACTIVE |
| ADAallied Die Casting CO of Illinois | Franklin Park | IL | Primary Metal Manufacturing331523 | — | ◐ LIKELY ACTIVE |
| ARArcelormittal Riverdale, INC. - Riverdale Facility | Riverdale | IL | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| CICaterpillar INC - Mapleton Facility | Mapleton | IL | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| CECom Ed - United Scrap Metal INC | Cicero | IL | Primary Metal Manufacturing331420 | 500+ | ◐ LIKELY ACTIVE |
| CSCustom Steel Processing (2) | Madison | IL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| DCDart Casting, Inc. Lombard Lane | Alsip | IL | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| DCDuro Cast INC | Somonauk | IL | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| EFExcel Foundry & Machine a Dba of Flsmidth INC | Pekin | IL | Primary Metal Manufacturing331529 | — | ◐ LIKELY ACTIVE |
| GCGranite City Works of United States Steel CORP | Granite City | IL | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |