| MAMetropolis Airport | Metropolis | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MMMeyer Materials CO | Crystal Lake | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MAMicrotron Abrasives, INC. | Pineville | NC | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MAMid America Sand & Gravel CO | Champaign | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MAMid America Sand & Gravel CO | Mahomet | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MRMiddleboro Recycling | Middleborough | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MAMidway Airport Amc Buildings | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MCMidwest Cement Products | Woosung | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MEMidwest Electronic | Ellsworth | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MSMidwest Sanitary Service INC | Wood River | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MSMidwest Soil Remediation | Lockport | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MFMike Fuhrman, Village President | Waynesville | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MRMilam Recycling & Disposal | East St Louis | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MMMinee Monesse Golf Course | Momence | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
 Mini Systems Incorporated | Plainville | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MVMinton Ventures, LLC | Lenoir | NC | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MMMissouri Meerschaum Company | Washington | MO | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MCMitchell Container Services INC | Saraland | AL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MLMixonsite LLC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MAMizzonis Auto Body INC. | Lodi | NJ | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MLM & L Oil CO INC | Cisne | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MHMontec Hydraulics/carmichaels | Carmichaels | PA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MPMoore Painting CO | Alton | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MTMoorestown Twp Water Pollution Control Plant | Moorestown | NJ | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MCMorris Community Landfill | Morris | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MGMorrison Grease Recycling INC | Morrison | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MSMorton Supplies INC | Morton | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MPMrc Polymers INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MFMr. Foamer, INC. | Tamarac | FL | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
| MRM&r Rubber CO | Belvidere | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MPMt Prospect Mail Pharmacy | Mount Prospect | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MCMulch Center the | North Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MCMulti / County Landfill | Villa Grove | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
 Mustang Survival Mfg., INC. | Elizabeth | WV | Textile Mills313320 | — | ◇ UNVERIFIED |
| NLNathan Lagin CO INC | Westbury | NY | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NCNational Chemical | Plainfield | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NSNational Scale Technology | Huntsville | AL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NENatural Environmental Protection | Pomona | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NGNatural Gas Pipeline CO of America | Chicago Heights | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NGNatural Gas Pipeline CO Station 206a | Altamont | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NPNavy Pier INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NDNc Dps - Johnston Paint Plant | Smithfield | NC | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NCNeri Contractors & Excavators INC | Lake in the Hills | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NCNestle Clinical Nutrition | Hopkins Park | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NENew England Tele | Lawrence | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NCNichem CORP | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NTNoah's Trading Post | Rockford | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NCNorco Cleaners INC | Dolton | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NANorth American Fastener CORP | Bridgeport | WV | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NANorth American Sterilization & Packaging CO INC | Hardyston Twp | NJ | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
