| MHMassdot Highway Division | Boston | MA | — | ◇ UNVERIFIED |
| MCMasterbrand Cabinets INC | Auburn | AL | — | ◇ UNVERIFIED |
| MDMaterials Development Corpora | Andover | MA | — | ◇ UNVERIFIED |
| MEMathis Excavating | Du Quoin | IL | — | ◇ UNVERIFIED |
| MIMat INC - Floodwood | Floodwood | MN | — | ◇ UNVERIFIED |
| MLMatt Leigh | Pontiac | IL | — | ◇ UNVERIFIED |
| MPMcdowell Panel & Components | Marion | NC | — | ◇ UNVERIFIED |
| MPMchenry Public Works Garage | Mchenry | IL | — | ◇ UNVERIFIED |
| MWMcneilly Wood Products, INC. | Hamptonburgh | NY | — | ◇ UNVERIFIED |
| MWMd Wood Llc/oklahoma City Mfg Fa | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MIMeadowvale INC | Sandwich | IL | — | ◇ UNVERIFIED |
| MFMedora Fs, INC. | Medora | IL | — | ◇ UNVERIFIED |
| MLMedranos Landscape INC | Rockford | IL | — | ◇ UNVERIFIED |
| MUMedrano USA INC | Saint Louis | MO | — | ◇ UNVERIFIED |
| MTMeioco Terminal | Ashkum | IL | — | ◇ UNVERIFIED |
| MIMerkle-korff Industries- Plant 3 | Des Plaines | IL | — | ◇ UNVERIFIED |
| MBMerritt Brothers Lumber | Athol | ID | — | ◇ UNVERIFIED |
| MAMerryman Aggregates | Harvard | IL | — | ◇ UNVERIFIED |
| MAMerryman Aggregates LLC | Woodstock | IL | — | ◇ UNVERIFIED |
| MEMerryman Excavation INC | Woodstock | IL | — | ◇ UNVERIFIED |
| MMMetal Management Midwest INC | Bedford Park | IL | — | ◇ UNVERIFIED |
| MTMetrolink Transit | Rock Island | IL | — | ◇ UNVERIFIED |
| MAMetropolis Airport | Metropolis | IL | — | ◇ UNVERIFIED |
| MPMetropolitan Pier & Exposition Authority | Chicago | IL | — | ◇ UNVERIFIED |
| MMMeyer Materials CO | Crystal Lake | IL | — | ◇ UNVERIFIED |
| MWMf Wiggins LLC | Wiggins | MS | — | ◇ UNVERIFIED |
| MGMich Gypsum CO | Whittemore | MI | — | ◇ UNVERIFIED |
| MPMichigan Pallet INC | Charlotte | MI | — | ◇ UNVERIFIED |
| MPMichigan Prestain | Wyoming | MI | — | ◇ UNVERIFIED |
| MWMichigan Wood Fuels LLC | Holland | MI | — | ◇ UNVERIFIED |
| MAMicrotron Abrasives, INC. | Pineville | NC | — | ◇ UNVERIFIED |
| MAMid America Frame Incorporated | Plattsburg | MO | — | ◇ UNVERIFIED |
| MAMid America Sand & Gravel CO | Mahomet | IL | — | ◇ UNVERIFIED |
| MAMid America Sand & Gravel CO | Champaign | IL | — | ◇ UNVERIFIED |
| MRMiddleboro Recycling | Middleborough | MA | — | ◇ UNVERIFIED |
| MAMidway Airport Amc Buildings | Chicago | IL | — | ◇ UNVERIFIED |
| MCMidwest Cement Products | Woosung | IL | — | ◇ UNVERIFIED |
| MEMidwest Electronic | Ellsworth | IL | — | ◇ UNVERIFIED |
| MRMidwest Rem Enterprises INC | Chicago | IL | — | ◇ UNVERIFIED |
| MSMidwest Sanitary Service INC | Wood River | IL | — | ◇ UNVERIFIED |
| MSMidwest Soil Remediation | Lockport | IL | — | ◇ UNVERIFIED |
| MFMike Fuhrman, Village President | Waynesville | IL | — | ◇ UNVERIFIED |
| MRMilam Recycling & Disposal | East Saint Louis | IL | — | ◇ UNVERIFIED |
| MDMiller Door and Trim, INC. | Goshen | IN | — | ◇ UNVERIFIED |
| MDMiller Door & Trim Incorporated | Goshen | IN | — | ◇ UNVERIFIED |
| MIMillwood INC | New Hope | MN | — | ◇ UNVERIFIED |
| MIMillwood INC | North Haven | CT | — | ◇ UNVERIFIED |
| MIMillwood Inc-melrose Park Fsc | Melrose Park | IL | — | ◇ UNVERIFIED |
| MMMinee Monesse Golf Course | Momence | IL | — | ◇ UNVERIFIED |
 Mini Systems Incorporated | Plainville | MA | — | ◇ UNVERIFIED |
| MSMinnesota Sawdust & Shavings CO INC | Sauk Centre | MN | — | ◇ UNVERIFIED |
| MVMinton Ventures, LLC | Lenoir | NC | — | ◇ UNVERIFIED |
| MFMissouri Fibre Corporation Chip Mill | Scott City | MO | — | ◇ UNVERIFIED |
| MMMissouri Meerschaum Company | Washington | MO | — | ◇ UNVERIFIED |
| MLMixonsite LLC | Chicago | IL | — | ◇ UNVERIFIED |
| MAMizzonis Auto Body INC. | Lodi | NJ | — | ◇ UNVERIFIED |
| MFMj Finishing | Bremen | IN | — | ◇ UNVERIFIED |
| MLM & L Oil CO INC | Cisne | IL | — | ◇ UNVERIFIED |
| MWMobilcraft Wood Products | Elkhart | IN | — | ◇ UNVERIFIED |
| MWModern Woodcrafts, LLC | Lewiston | ME | — | ◇ UNVERIFIED |
| MIMonarch Industries | Warren | RI | — | ◇ UNVERIFIED |
| MHMontec Hydraulics/carmichaels | Carmichaels | PA | — | ◇ UNVERIFIED |
| MPMoore Painting CO | Alton | IL | — | ◇ UNVERIFIED |
| MTMoorestown Twp Water Pollution Control Plant | Moorestown | NJ | — | ◇ UNVERIFIED |
| MEMorgan Electro Ceramics (1318031627) | Bedford | OH | — | ◇ UNVERIFIED |
| MCMorris Community Landfill | Morris | IL | — | ◇ UNVERIFIED |
| MGMorrison Grease Recycling INC | Morrison | IL | — | ◇ UNVERIFIED |
| MSMorton Supplies INC | Morton | IL | — | ◇ UNVERIFIED |
| MFMountaineer Furniture Mfg | Isom | KY | — | ◇ UNVERIFIED |
| MWMountain West Bark | Rexburg | ID | — | ◇ UNVERIFIED |
| MWMountain West LLC | Superior | MT | — | ◇ UNVERIFIED |
| MWMountain Wood Products, LLC | Evensville | TN | — | ◇ UNVERIFIED |
| MPMrc Polymers INC | Chicago | IL | — | ◇ UNVERIFIED |
| MFMr. Foamer, INC. | Tamarac | FL | — | ◇ UNVERIFIED |
| MRMrf Recycling | Sparta | TN | — | ◇ UNVERIFIED |
| MRM&r Rubber CO | Belvidere | IL | — | ◇ UNVERIFIED |
| MMMtn Mulch Sassamansville/sassamansville | Sassamansville | PA | — | ◇ UNVERIFIED |
| MPMt Prospect Mail Pharmacy | Mount Prospect | IL | — | ◇ UNVERIFIED |
| MCMulch Center the | North Chicago | IL | — | ◇ UNVERIFIED |
| MCMulti / County Landfill | Villa Grove | IL | — | ◇ UNVERIFIED |
 Mustang Survival Mfg., INC. | Elizabeth | WV | — | ◇ UNVERIFIED |
| MWM W Carr CO INC | Somerville | MA | — | ◇ UNVERIFIED |
| NLNathan Lagin CO INC | Westbury | NY | — | ◇ UNVERIFIED |
| NCNational Chemical | Plainfield | IL | — | ◇ UNVERIFIED |
| NCNational Container Group LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| NGNational Gypsum Co-tawas City | Tawas City | MI | — | ◇ UNVERIFIED |
| NGNational Gypsum-national City Plant and Wwsl | National City | MI | — | ◇ UNVERIFIED |
| NPNational Pallet | Miami | FL | — | ◇ UNVERIFIED |
| NSNational Scale Technology | Huntsville | AL | — | ◇ UNVERIFIED |
| NWNational Wood Products of Maine, INC. | Oxford | ME | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply Corp/henderson Sta | Stoneboro | PA | — | ◇ UNVERIFIED |
| NENatural Environmental Protection | Pomona | CA | — | ◇ UNVERIFIED |
| NGNatural Gas Pipeline CO of America | Chicago Heights | IL | — | ◇ UNVERIFIED |
| NGNatural Gas Pipeline CO Station 206a | Altamont | IL | — | ◇ UNVERIFIED |
| NBNature's Best Organics of Tennessee, LLC Dba Living Earth - Middlebrook Pike (mi | Knoxville | TN | — | ◇ UNVERIFIED |
| NENature's Earth Pellets LLC | Reform | AL | — | ◇ UNVERIFIED |
| NDNc Dps - Johnston Paint Plant | Smithfield | NC | — | ◇ UNVERIFIED |
| NINc Industries INC | Arley | AL | — | ◇ UNVERIFIED |
| NPNefab Packaging INC | Compton | CA | — | ◇ UNVERIFIED |
| NPNefab Packaging West LLC | Newark | CA | — | ◇ UNVERIFIED |
