| JAJoliet Army Ammunition Plant | Wilmington | — | ◇ UNVERIFIED |
| KRKankakee Renewable Energy LLC | Kankakee | — | ◇ UNVERIFIED |
| KAK. a . Steel Chemicals, INC. D/b/a Olin Chlor Alkalai Products and Vinyls | Lemont | — | ◇ UNVERIFIED |
| KAKaufman Ag Service INC | Cissna Park | — | ◇ UNVERIFIED |
| KCKenny Construction CO | Bedford Park | — | ◇ UNVERIFIED |
| KSKester Solder | Des Plaines | — | ◇ UNVERIFIED |
| KMKohl & Madden Printing Ink CORP | Elk Grove Village | — | ◇ UNVERIFIED |
| KCKolorcure CORP | Batavia | — | ◇ UNVERIFIED |
| KCKorex Chicago LLC | Chicago | — | ◇ UNVERIFIED |
| LCLaidlaw CORP | Metropolis | — | ◇ UNVERIFIED |
| LTLambent Technologies CORP | Skokie | — | ◇ UNVERIFIED |
| LILinde INC | Sterling | — | ◇ UNVERIFIED |
| LALubrizol Advanced Materials | Countryside | — | ◇ UNVERIFIED |
| LALubrizol Advanced Materials INC | Mccook | — | ◇ UNVERIFIED |
| LPLuster Prod INC | Chicago | — | ◇ UNVERIFIED |
| MNMarco Npk INC | Clinton | — | ◇ UNVERIFIED |
| MIMarquis INC | Hennepin | — | ◇ UNVERIFIED |
| MOMartin Operating Partnership LP | Seneca | — | ◇ UNVERIFIED |
| MSMarubenl Specialty Chemicals | Vandalia | — | ◇ UNVERIFIED |
| MMMatchless Metal Polish CO | Chicago | — | ◇ UNVERIFIED |
| MPMeda Pharmaceuticals INC | Decatur | — | ◇ UNVERIFIED |
| MIMenard INC | Chicago | — | ◇ UNVERIFIED |
| MBMept Bedford Park LLC | Bedford Park | — | ◇ UNVERIFIED |
| MFMetal Finishing Research CORP | Chicago | — | ◇ UNVERIFIED |
| MAMid America Coatings | Addison | — | ◇ UNVERIFIED |
| MAMid America Protective Coatings | Franklin Park | — | ◇ UNVERIFIED |
| MAMid America Protective Coatings INC | Elk Grove Village | — | ◇ UNVERIFIED |
| MBMidwest Biodiesel Products | South Roxana | — | ◇ UNVERIFIED |
| MMMidwest Micronutrients LLC | Ford Heights | — | ◇ UNVERIFIED |
| MGMorton Grove Pharmaceuticals Incorporated | Morton Grove | — | ◇ UNVERIFIED |
| MIMpg Industries INC | Joliet | — | ◇ UNVERIFIED |
| MHMrc Holdings | Alton | — | ◇ UNVERIFIED |
| MPMrc Polymers INC | Chicago | — | ◇ UNVERIFIED |
| MSMulticolor Specialties INC | Cicero | — | ◇ UNVERIFIED |
| NSNanochem Solutions INC | Peru | — | ◇ UNVERIFIED |
| NCNarchem CORP | Chicago | — | ◇ UNVERIFIED |
| NBNational Bronze Powder CO INC | Franklin Park | — | ◇ UNVERIFIED |
| NCNational Casein CO | Chicago | — | ◇ UNVERIFIED |
| NINational Interchem CORP | Chicago | — | ◇ UNVERIFIED |
| NSNational Starch & Chemical CO | Meredosia | — | ◇ UNVERIFIED |
| NTNational Trail Biodiesel Group LLC | Newton | — | ◇ UNVERIFIED |
| NCNazdar Chicago | Chicago | — | ◇ UNVERIFIED |
| NCNew Cie Opco LLC | Canton | — | ◇ UNVERIFIED |
| NANorth American Polymer Company LTD | Skokie | — | ◇ UNVERIFIED |
| NANorth American Salt CO | Chicago | — | ◇ UNVERIFIED |
| NFNorthern Fs, INC. - Marengo | Marengo | — | ◇ UNVERIFIED |
| NPNorthwestern Plating Works | Chicago | — | ◇ UNVERIFIED |
| NCNova Chemicals | Channahon | — | ◇ UNVERIFIED |
 Novartis Gene Therapies INC | Libertyville | — | ◇ UNVERIFIED |
| NTNsr Technologies INC | Decatur | — | ◇ UNVERIFIED |
