| ATAtlas Tube INC | Chicago | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| IZImperial Zinc CORP | Chicago | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| MBMeskan Brass Foundry | Chicago | IL | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| NPNaylor Pipe CO | Chicago | IL | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| SMSoudan Metals Company INC. | Chicago | IL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| WTWheatland Tube CO - Chicago Div | Chicago | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| MIMidland Industries INC | Chicago | IL | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| OKO & K American CORP. | Chicago | IL | Primary Metal Manufacturing331111 | 100-499 | ◐ LIKELY ACTIVE |
| MLMaruichi Leavitt Pipe & Tube | Chicago | IL | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| UEUniversal Electric Foundry INC | Chicago | IL | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |
| CACentury Aluminum CO | Chicago | IL | Primary Metal Manufacturing331313 | — | ◐ LIKELY ACTIVE |
| LBLeitelt Brothers Foundry, INC | Chicago | IL | Primary Metal Manufacturing331525 | 1-19 | ◐ LIKELY ACTIVE |
| ADAndy's Deli & Mikolajczk | Chicago | IL | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SMSipi Metals CORP | Chicago | IL | Primary Metal Manufacturing331492 | 100-499 | ◐ LIKELY ACTIVE |
| AMAllied Metal CO | Chicago | IL | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| FFulton | Chicago | IL | Primary Metal Manufacturing331491 | 100-499 | ◐ LIKELY ACTIVE |
| OAO&k American - Chicago Plant | Chicago | IL | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| SWSteel Warehouse of Illinois | Chicago | IL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |