| MGMadden Galvanizing, LLC | Hockley | TX | — | ◇ UNVERIFIED |
| MIMadix, INC. - Goodwater | Goodwater | AL | — | ◇ UNVERIFIED |
| MFMagic Finishing CO. | Grand Rapids | MI | — | ◇ UNVERIFIED |
| MEMagnesium Elektron North America INC. (0332010060) | Findlay | OH | — | ◇ UNVERIFIED |
| MIMagnetic Inspection Lab INC | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| MWMagnet Wave Products INC | Hardwick | MA | — | ◇ UNVERIFIED |
| MIMaine Industrial Tire | Gorham | ME | — | ◇ UNVERIFIED |
| MHMann & Hummel USA INC. | South Bend | IN | — | ◇ UNVERIFIED |
| MEManufacturers Enameling CORP | Toledo | OH | — | ◇ UNVERIFIED |
| MBMar Bal INC | Cuba | MO | — | ◇ UNVERIFIED |
| MIMar-bal INC | Chagrin Falls | OH | — | ◇ UNVERIFIED |
| MIMar-bal INC. (0243112019) | Painesville | OH | — | ◇ UNVERIFIED |
| MPMar-bal Pultrusion, INC. | Willoughby | OH | — | ◇ UNVERIFIED |
| MCMarble Connection/cabinet Connection | Port Saint Lucie | FL | — | ◇ UNVERIFIED |
| MPMarble Palace | Stockton | CA | — | ◇ UNVERIFIED |
| MCMarch Coatings INC | Brighton | MI | — | ◇ UNVERIFIED |
| MCMarch Coatings Plant 2 | Brighton | MI | — | ◇ UNVERIFIED |
| MEMarine Electrical Products | Lebanon | MO | — | ◇ UNVERIFIED |
| MIMark I Molded Plastics of Tennessee | Henry | TN | — | ◇ UNVERIFIED |
| MRMark Richey Woodworking & Design INC | Newburyport | MA | — | ◇ UNVERIFIED |
| MIMarlock INC | Maynardville | TN | — | ◇ UNVERIFIED |
 Marsam Metal Finishing | New Britain | CT | — | ◇ UNVERIFIED |
| MSMarshalls Sandblasting and Painting | Willis | VA | — | ◇ UNVERIFIED |
| MCMartin Container Service INC | Wilmington | CA | — | ◇ UNVERIFIED |
| MMMartin Marietta Composites INC Sparta Facility | Sparta | NC | — | ◇ UNVERIFIED |
| MSMartin Specialty Coatings LLC | Shreveport | LA | — | ◇ UNVERIFIED |
| MPMaryland Plastics | Federalsburg | MD | — | ◇ UNVERIFIED |
| MRMasco Retail Cabinet Group | Waverly | OH | — | ◇ UNVERIFIED |
| MCMass Container CORP | Marlborough | MA | — | ◇ UNVERIFIED |
| MPMastercraft Pattern and Model Works INC / Fiberglass Reinforced Plastic Mfg Faci | North Miami | OK | — | ◇ UNVERIFIED |
| MIMasterfab INC | Goshen | IN | — | ◇ UNVERIFIED |
| MFMaster Finishing and Restorat | Needham | MA | — | ◇ UNVERIFIED |
| MMMaster Molded Products | Elgin | IL | — | ◇ UNVERIFIED |
| MCMasters Corporation | Lowell | MA | — | ◇ UNVERIFIED |
| MPMaterial Processing and Handling CO | Fostoria | OH | — | ◇ UNVERIFIED |
| MPMaterial Processing INC | Riverview | MI | — | ◇ UNVERIFIED |
| MIMatlab Incorporated Ramseur Facility | Ramseur | NC | — | ◇ UNVERIFIED |
| MIMatlab, INC. - Plants 1-4, 5, 7, 8 and 11 | Asheboro | NC | — | ◇ UNVERIFIED |
| MPMato Plastics INC. | Valencia | CA | — | ◇ UNVERIFIED |
| MPMauser Packaging Solutions | Charlotte | NC | — | ◇ UNVERIFIED |
| MPMaverick Powder Coat & Sandblast | Anaheim | CA | — | ◇ UNVERIFIED |
| MMMaxpro Manufacturing | Whiteville | NC | — | ◇ UNVERIFIED |
| MMMayfair Molded Products CORP | Schiller Park | IL | — | ◇ UNVERIFIED |
| MFMay Foundry & Machine | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MEMayville Engineering Company | Wytheville | VA | — | ◇ UNVERIFIED |
| MBMccann Barrel | Milwaukee | WI | — | ◇ UNVERIFIED |
| MPMcclarin Plastics LLC | Hanover | PA | — | ◇ UNVERIFIED |
| MMMccormick & Mccormick Investments, LLC | Little Rock | AR | — | ◇ UNVERIFIED |
| MPMcmaster Plating | Longview | TX | — | ◇ UNVERIFIED |
| MEMcneal Enterprises | San Jose | CA | — | ◇ UNVERIFIED |
