| JIJernberg Industries INC | Chicago | — | ◇ UNVERIFIED |
 JM Industries, LLC | Chicago | — | ◇ UNVERIFIED |
| Jm Industries LLC | Chicago Heights | — | ◇ UNVERIFIED |
| KIKaylen Industries, INC. Dba Mohawk Spring Corporation | Schiller Park | — | ◇ UNVERIFIED |
| KBKD Buyer LLC | Chicago | — | ◇ UNVERIFIED |
| KCK-display CORP | Chicago | — | ◇ UNVERIFIED |
| KIKeefaffer Industries Corporation | Schaumburg | — | ◇ UNVERIFIED |
| KTKhi Technologies, LLC | Franklin Park | — | ◇ UNVERIFIED |
| KSKirby Sheet Metal Works, INC. | Chicago | — | ◇ UNVERIFIED |
| KTKlein Tool INC | Skokie | — | ◇ UNVERIFIED |
 Kocsis Brothers Machine CO | Alsip | — | ◇ UNVERIFIED |
| KPKonstant Products, INC. | Rolling Meadows | — | ◇ UNVERIFIED |
| KIKora Industries INC. | Chicago | — | ◇ UNVERIFIED |
| LELang Exterior, INC. | Chicago | — | ◇ UNVERIFIED |
| LSLarson Steel Products, LLC | Bedford Park | — | ◇ UNVERIFIED |
| LSLb Steel, LLC | Harvey | — | ◇ UNVERIFIED |
| LILdr Industries, INC. | Chicago | — | ◇ UNVERIFIED |
| LMLitho-graphic Metal CORP | Bedford Park | — | ◇ UNVERIFIED |
| LML & M Welding, Inc. | Chicago | — | ◇ UNVERIFIED |
| LPLo-ko Performance Coatings INC | Oak Lawn | — | ◇ UNVERIFIED |
| LMLorbern MFG. Inc. | Schaumburg | — | ◇ UNVERIFIED |
| LWLpi Worldwide INC | Chicago | — | ◇ UNVERIFIED |
| MIMace Iron Works, INC. | Chicago | — | ◇ UNVERIFIED |
| MMMachined Metals Manufacturing, INC. | Elk Grove Village | — | ◇ UNVERIFIED |
| MSMadon Sheet Metal LLC | Elk Grove Village | — | ◇ UNVERIFIED |
| MSMaestranzi Sons, LLC | Stone Park | — | ◇ UNVERIFIED |
| MSMagnus Screw Products | Chicago | — | ◇ UNVERIFIED |
| MMMarcres Manufacturing, INC. Dba Macres Metal Works | Mount Prospect | — | ◇ UNVERIFIED |
| MMMarv-O-Lus Manufacturing Company | Chicago | — | ◇ UNVERIFIED |
| MWMatthew Warren, INC. Dba Automatic Spring Coiling, CO. | Chicago | — | ◇ UNVERIFIED |
| MMM.D. Metals, Inc. | Bedford Park | — | ◇ UNVERIFIED |
| MCMel Cor Sheet Metal, INC | Lyons | — | ◇ UNVERIFIED |
| MWMetal Work US, Inc. | Des Plaines | — | ◇ UNVERIFIED |
| MSMeyer Steel Drum, INC. | Chicago | — | ◇ UNVERIFIED |
| MMMichael Marhofer | Cicero | — | ◇ UNVERIFIED |
| MSMicromatic Spring CO | Franklin Park | — | ◇ UNVERIFIED |
| MTMicro Thread Corporation | Chicago | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing and Distributing, INC. Dba Midwest Metal Forming | Chicago | — | ◇ UNVERIFIED |
| MRMidwest Remanufacturing, LLC | Bedford Park | — | ◇ UNVERIFIED |
| MIMifab INC | Chicago | — | ◇ UNVERIFIED |
| MIMifab Inc-kamflex Facility | Des Plaines | — | ◇ UNVERIFIED |
| MQM&m Quality Grinding | Hodgkins | — | ◇ UNVERIFIED |
| MWMonda Window & Door, CORP. | Chicago | — | ◇ UNVERIFIED |
| MIMorey Industries, Inc., Dba Westmont Engineering Company | Broadview | — | ◇ UNVERIFIED |
| MGMor-Sel Group LLC | Wheeling | — | ◇ UNVERIFIED |
| MWMpack Winthrop Corporation | Alsip | — | ◇ UNVERIFIED |
| MOMueller Ornamental Iron Works, INC. | Elk Grove Village | — | ◇ UNVERIFIED |
| MIMy-signguy.com, INC. | Glenview | — | ◇ UNVERIFIED |
| NCNational Coating Technologies | Northbrook | — | ◇ UNVERIFIED |
| NPNational Plating Solutions LLC | Melrose Park | — | ◇ UNVERIFIED |
