| MHMarvel Holdings LLC | Orchard | TX | — | ◇ UNVERIFIED |
| MMMaryland Metals Processing, INC. | Sparrows Point | MD | — | ◇ UNVERIFIED |
| MSMaryland Structural Fabricators INC | Millington | MD | — | ◇ UNVERIFIED |
| MLMascoat LLC | West Monroe | LA | — | ◇ UNVERIFIED |
| MCMason Corporation | Jemison | AL | — | ◇ UNVERIFIED |
| MMMason Machine and Fab, LLC | Lafayette | LA | — | ◇ UNVERIFIED |
| MSMason Structural Steel INC. | Walton Hills | OH | — | ◇ UNVERIFIED |
| MWMason West, INC | Placentia | CA | — | ◇ UNVERIFIED |
| MWMaspeth Welding, INC | New York | NY | — | ◇ UNVERIFIED |
| MIMasport Incorporated | Lincoln | NE | — | ◇ UNVERIFIED |
| MLMasses LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| MMMassey Metals INC. | Tampa | FL | — | ◇ UNVERIFIED |
| MMMass Machine & Fabricating Company | Washington | PA | — | ◇ UNVERIFIED |
| MBMaster Bilt Products Site 2 | New Albany | MS | — | ◇ UNVERIFIED |
| MFMaster Fabrication LLC | Knoxville | IA | — | ◇ UNVERIFIED |
| MMMaster Magnetics, INC. | Castle Rock | CO | — | ◇ UNVERIFIED |
| MSMaster Sheet Metal | New York | NY | — | ◇ UNVERIFIED |
| MSMaster Sheet Metal, INC. | Schofield Barracks | HI | — | ◇ UNVERIFIED |
| MHMastic Home Exteriors, INC. | Sidney | OH | — | ◇ UNVERIFIED |
| MCMasto Contractor Services INC | Albuquerque | NM | — | ◇ UNVERIFIED |
| MMMatcor Metal Fabrication | Morton | IL | — | ◇ UNVERIFIED |
| MCMaterial Control | Croswell | MI | — | ◇ UNVERIFIED |
| MCMaterial Control INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| MCMaterial Control, INC. | Arlington | TX | — | ◇ UNVERIFIED |
| MCMaterial Control Systems, INC. | Cordova | IL | — | ◇ UNVERIFIED |
| MHMaterial Handling Technologies, INC. | North Syracuse | NY | — | ◇ UNVERIFIED |
| MHMaterial Handling Technology | Fair Haven | MI | — | ◇ UNVERIFIED |
| MSMaterial Supply INC. | Las Vegas | NV | — | ◇ UNVERIFIED |
| MHMat Holdings INC. Dba Midwest Air Technologies | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| MMMatrix Manufacturing, INC. | Springfield | MO | — | ◇ UNVERIFIED |
| MIMattessich Iron, LLC | Memphis | NY | — | ◇ UNVERIFIED |
| MIMattessich Iron, LLC | Baldwinsville | NY | — | ◇ UNVERIFIED |
| MBMatthews Blow Pipe CO INC | Memphis | TN | — | ◇ UNVERIFIED |
 Matthews International Corporation | San Jacinto | CA | — | ◇ UNVERIFIED |
| MMMatthews Manufacturing INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| MEMatzke Enterprises, INC. | Salem | WI | — | ◇ UNVERIFIED |
| MAMaumee Assembly & Stamping | Maumee | OH | — | ◇ UNVERIFIED |
| MBMaura Buildings, Incorporated | Lebanon | PA | — | ◇ UNVERIFIED |
| MMMaurice Mesple Dba Mesples Machine Shop and Pump | Fresno | CA | — | ◇ UNVERIFIED |
 Maverick Manufacturing LLC | Lakeville | MN | — | ◇ UNVERIFIED |
| MSMaverick Sheet Metal LLC | Conroe | TX | — | ◇ UNVERIFIED |
| MMMaxco Manufacturing LLC | Ona | WV | — | ◇ UNVERIFIED |
| MMMaxco Manufacturing LLC | Ona | WV | — | ◇ UNVERIFIED |
| MLMaximus-3 LLC | Auburn Hills | MI | — | ◇ UNVERIFIED |
 Max Machining, LLC | Perkasie | PA | — | ◇ UNVERIFIED |
| MMMax Manufacturing INC | Bend | OR | — | ◇ UNVERIFIED |
| MEMayoni Enterprises | Pacoima | CA | — | ◇ UNVERIFIED |
| MSMay Specialty Fabricators, INC. | Register | GA | — | ◇ UNVERIFIED |
| MLMaysteel, LLC | Allenton | WI | — | ◇ UNVERIFIED |
| MPMaysteel Porters | Garland | TX | — | ◇ UNVERIFIED |
