| MEManning Equipment Company | Louisville | KY | — | ◇ UNVERIFIED |
| MOMap of Easton, INC. | Granger | IN | — | ◇ UNVERIFIED |
| MIMarathon Industries INC | Santa Clarita | CA | — | ◇ UNVERIFIED |
| MIMarathon Industries INC | Palmdale | CA | — | ◇ UNVERIFIED |
| MIMarathon Industries INC | Saugus | CA | — | ◇ UNVERIFIED |
| MAMarcums Auto Sales | Irvine | KY | — | ◇ UNVERIFIED |
| MEMarro's Equipment & Trucks INC. | Waterloo | NY | — | ◇ UNVERIFIED |
| MMartin | San Diego | CA | — | ◇ UNVERIFIED |
| MHMartinrea Hopkinsville LLC | Hopkinsville | KY | — | ◇ UNVERIFIED |
| MVMayflower Vehicle Systems, LLC | Kings Mountain | NC | — | ◇ UNVERIFIED |
 Mayville Engineering Company, INC. (mec) - Virginia Main Plant - Wytheville | Wytheville | VA | — | ◇ UNVERIFIED |
 Mclaughlin Body CO | East Moline | IL | — | ◇ UNVERIFIED |
| MTMcneilus Truck and Manufacturing, INC. | Dodge Center | MN | — | ◇ UNVERIFIED |
| MTMcneilus Truck and Mfg INC | Villa Rica | GA | — | ◇ UNVERIFIED |
| MTMcneilus Truck & Manufacturing | Colton | CA | — | ◇ UNVERIFIED |
| MTMcneilus Truck - Manufacturing INC | Dodge Center | MN | — | ◇ UNVERIFIED |
| MTMcneilus Truck & Manufacturing Truck Sales/service Center | Villa Rica | GA | — | ◇ UNVERIFIED |
| MMMedlin Material Handling Equipment,inc. | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| MAMedtec Ambulance CORP | White Pigeon | MI | — | ◇ UNVERIFIED |
| MLMelleck LLC | Hopkinsville | KY | — | ◇ UNVERIFIED |
| MUMercedes-benz US International - Bibb County Campus | Woodstock | AL | — | ◇ UNVERIFIED |
| MMMercy Medical Transp INC | Mariposa | CA | — | ◇ UNVERIFIED |
| MHMeritor Heavy Vehicle Systems, LLC | Forest City | NC | — | ◇ UNVERIFIED |
| MSMetalsa Sa De Cv | Owensboro | KY | — | ◇ UNVERIFIED |
| MTMetro Truck Body INC | Corona | CA | — | ◇ UNVERIFIED |
| MTMeyer Truck Equipment | Jasper | IN | — | ◇ UNVERIFIED |
| MTMickey Truck Bodies INC | High Point | NC | — | ◇ UNVERIFIED |
| MTMickey Truck Bodies INC | Dallas | TX | — | ◇ UNVERIFIED |
| MTMickey Truck Bodies INC | Bloomington | IL | — | ◇ UNVERIFIED |
| MTMickey Truck Body INC | Freehold | NJ | — | ◇ UNVERIFIED |
| MBMidwest Bedliners & Truck Toys | Coal City | IL | — | ◇ UNVERIFIED |
| MMMighty Mover Trailers INC | Corona | CA | — | ◇ UNVERIFIED |
| MTMillennium Transit Services | Roswell | NM | — | ◇ UNVERIFIED |
| MIMiller Ind/chevron | Mercer | PA | — | ◇ UNVERIFIED |
 Miller Industries Towing Equipment, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| MKMitsui Kinzoku Catalysts America INC | Frankfort | KY | — | ◇ UNVERIFIED |
| MWMobility Works (driverge Vehicle Innovations) | Chico | CA | — | ◇ UNVERIFIED |
| MWMobility Works INC | Madison Heights | MI | — | ◇ UNVERIFIED |
| MMModine Mfg Company | Trenton | MO | — | ◇ UNVERIFIED |
| MNMojave Nissan of Barstow | Barstow | CA | — | ◇ UNVERIFIED |
| MCMonroe Custom Utility Bodies | Greenfield | IN | — | ◇ UNVERIFIED |
| MTMonroe Truck Equipment | Janesville | WI | — | ◇ UNVERIFIED |
| MTMonroe Truck Equipment (conversion Shop) | Monroe | WI | — | ◇ UNVERIFIED |
 Monroe Truck Equipment, INC. | Louisville | KY | — | ◇ UNVERIFIED |
| MAMonty's Auto Salvage | Cullman | AL | — | ◇ UNVERIFIED |
| MCMorgan Corporation | Corsicana | TX | — | ◇ UNVERIFIED |
| MCMorgan Corporation | Denver | CO | — | ◇ UNVERIFIED |
| MOMorgan Olson, LLC | Sturgis | MI | — | ◇ UNVERIFIED |
| MOMorgan Olson North Charleston | N Charleston | SC | — | ◇ UNVERIFIED |
| MTMorgan Truck Body Ephrata | Ephrata | PA | — | ◇ UNVERIFIED |
