| MMMagna Mirrors Corporation | Grand Haven | MI | — | ◇ UNVERIFIED |
| MFMagnat Fairview INC | Chicopee | MA | — | ◇ UNVERIFIED |
| MBMahle Behr USA INC | Troy | MI | — | ◇ UNVERIFIED |
| MEMahle Engine Components USA INC | Caldwell | OH | — | ◇ UNVERIFIED |
| MEMahle Engine Components USA INC | Franklin | KY | — | ◇ UNVERIFIED |
| MEMahle Engine Components USA Inc-manchester | Manchester | MO | — | ◇ UNVERIFIED |
 Mahle Industrial Thermal Systems America | Grand Rapids | MI | — | ◇ UNVERIFIED |
| MIMaine Ind Tire Llc/red Lion | Red Lion | PA | — | ◇ UNVERIFIED |
| MMMajestic Machine & Engineering, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MMMa Metal | Edinburgh | IN | — | ◇ UNVERIFIED |
| MEMan Energy Solutions USA INC | Pompano Beach | FL | — | ◇ UNVERIFIED |
| MDMann Distribution LLC | Warwick | RI | — | ◇ UNVERIFIED |
| MEManning Equipment Company | Louisville | KY | — | ◇ UNVERIFIED |
| MTMapp Technologies, L.l.c. | Joplin | MO | — | ◇ UNVERIFIED |
| MIMarada Industries | Westminster | MD | — | ◇ UNVERIFIED |
| MPMarch Performance INC | Naples | FL | — | ◇ UNVERIFIED |
| MAMarcums Auto Sales | Irvine | KY | — | ◇ UNVERIFIED |
| MPMarion Process Solutions | Marion | IA | — | ◇ UNVERIFIED |
| MVMark Vii Equipment Incorporated | Arvada | CO | — | ◇ UNVERIFIED |
| MCMarox CORP | Holyoke | MA | — | ◇ UNVERIFIED |
| MTMarquette Tool & Die | Saint Louis | MO | — | ◇ UNVERIFIED |
| MCMars Company | Ocala | FL | — | ◇ UNVERIFIED |
| MTMartin Technologies | New Hudson | MI | — | ◇ UNVERIFIED |
| MTMatco Tools | Lakewood | NY | — | ◇ UNVERIFIED |
| MTMaterials Technology INC | Somerset | NJ | — | ◇ UNVERIFIED |
| MBMaterion Brush INC | Fremont | CA | — | ◇ UNVERIFIED |
| MMMathy Machine INC | Santee | CA | — | ◇ UNVERIFIED |
 Matrix Machine and Repair INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MAMatsu Alabama, INC | Huntsville | AL | — | ◇ UNVERIFIED |
| MCMauell Corporation-utility Room | Dillsburg | PA | — | ◇ UNVERIFIED |
| MMMaxcor Manufacturing INC | Colorado Springs | CO | — | ◇ UNVERIFIED |
 Mayville Engineering Company, INC. (mec) - Virginia Main Plant - Wytheville | Wytheville | VA | — | ◇ UNVERIFIED |
| MVMay-wilbert Vault-pt Huron | Port Huron | MI | — | ◇ UNVERIFIED |
| MGMcclain Galion | Winesburg | OH | — | ◇ UNVERIFIED |
| MIMccullough Industries | Kenton | OH | — | ◇ UNVERIFIED |
| MIMcgill INC | Marengo | IL | — | ◇ UNVERIFIED |
 Mclaughlin Body CO | East Moline | IL | — | ◇ UNVERIFIED |
| MMMcmillan Mechanical & Machine Co., INC. | Shreveport | LA | — | ◇ UNVERIFIED |
| MTMcneilus Truck and Mfg INC | Villa Rica | GA | — | ◇ UNVERIFIED |
| MEMcstowe Engineering | East Bridgewater | MA | — | ◇ UNVERIFIED |
| MSMd Stainless Services INC | Downey | CA | — | ◇ UNVERIFIED |
| MFMeadville Forging CO | Cambridge Springs | PA | — | ◇ UNVERIFIED |
| MTMeca & Technology Machine INC | Green Bay | WI | — | ◇ UNVERIFIED |
| MBMedina Blanking INC. | Valley City | OH | — | ◇ UNVERIFIED |
| MCMedin CORP | Totowa | NJ | — | ◇ UNVERIFIED |
| MAMedtec Ambulance CORP | White Pigeon | MI | — | ◇ UNVERIFIED |
| MMMegawatt Machine Services | Somerset | NJ | — | ◇ UNVERIFIED |
| MLMelleck LLC | Hopkinsville | KY | — | ◇ UNVERIFIED |
| MMMercury Manufacturing Company | Wyandotte | MI | — | ◇ UNVERIFIED |
| MHMeritor Heavy Vehicle Systems, LLC | Forest City | NC | — | ◇ UNVERIFIED |
| MIMeritor Industrial Products LLC | Chicago | IL | — | ◇ UNVERIFIED |
| MSMerit Specialities-merit Specialities | Saint Louis | MO | — | ◇ UNVERIFIED |
| MBMetal Bellows Corporation | Moorpark | CA | — | ◇ UNVERIFIED |
| MBMetal Box International INC | Franklin Park | IL | — | ◇ UNVERIFIED |
| MCMetal Components INC | Paterson | NJ | — | ◇ UNVERIFIED |
| MTMetalcraft Technologies INC. | Cedar City | UT | — | ◇ UNVERIFIED |
| MCMetal Cutting CORP | Cedar Grove | NJ | — | ◇ UNVERIFIED |
| MIMetal-fab INC | Champaign | IL | — | ◇ UNVERIFIED |
| MBMetallic Bonds LTD | Beloit | WI | — | ◇ UNVERIFIED |
| MIMetalogic Industries LLC | Southbridge | MA | — | ◇ UNVERIFIED |
 Metalor Technologies USA | Port Huron | MI | — | ◇ UNVERIFIED |
| MPMetal Processors INC | Jackson | MS | — | ◇ UNVERIFIED |
| MSMetal Spinners | Angola | IN | — | ◇ UNVERIFIED |
| MSMetal Spinners | Angola | IN | — | ◇ UNVERIFIED |
| MUMetals USA Mobile | Mobile | AL | — | ◇ UNVERIFIED |
| MMetalution | Holland | MI | — | ◇ UNVERIFIED |
| MLMetavation, LLC | Traverse City | MI | — | ◇ UNVERIFIED |
| MCMetform CORP | Savanna | IL | — | ◇ UNVERIFIED |
| MLMetform LLC | Mount Carroll | IL | — | ◇ UNVERIFIED |
| MTMgk Technologies INC | Homer City | PA | — | ◇ UNVERIFIED |
| MHM & H Industries INC | Livonia | MI | — | ◇ UNVERIFIED |
| MGMic Group | Brenham | TX | — | ◇ UNVERIFIED |
| MAMichael Anthony Jewelers Incorporated | Mount Vernon | NY | — | ◇ UNVERIFIED |
| MTMickey Truck Bodies INC | High Point | NC | — | ◇ UNVERIFIED |
| MTMickey Truck Bodies INC | Bloomington | IL | — | ◇ UNVERIFIED |
| MTMickey Truck Body INC | Freehold | NJ | — | ◇ UNVERIFIED |
| MMicro | Largo | FL | — | ◇ UNVERIFIED |
| MIMicrobest INC | Waterbury | CT | — | ◇ UNVERIFIED |
| MMMicron Manufacturing CO | Grand Rapids | MI | — | ◇ UNVERIFIED |
| MMMiddletown Metal Works, INC. | Berea | KY | — | ◇ UNVERIFIED |
| MMMidland Metals Products | Chicago | IL | — | ◇ UNVERIFIED |
| MBMid-south Bolt & Screw CO INC | Nashville | TN | — | ◇ UNVERIFIED |
| MFMid-south Fabrications INC | Jemison | AL | — | ◇ UNVERIFIED |
| MMMidstate Manufacturing | Galesburg | IL | — | ◇ UNVERIFIED |
| MSMidwestern Steel Fabricators Chicago LLC | Hammond | IN | — | ◇ UNVERIFIED |
| MIMidwest Ind & Dev LTD | Mcpherson | KS | — | ◇ UNVERIFIED |
| MIMiller/greeneville INC. | Greeneville | TN | — | ◇ UNVERIFIED |
| MIMiller Industrial | Kokomo | IN | — | ◇ UNVERIFIED |
 Miller Industries Towing Equipment INC. (lee Hwy.) | Chattanooga | TN | — | ◇ UNVERIFIED |
 Miller Welding & Machine CO | Brookville | PA | — | ◇ UNVERIFIED |
| MCMills CO | Upper Sandusky | OH | — | ◇ UNVERIFIED |
| MUMinova USA INC | Grundy | VA | — | ◇ UNVERIFIED |
| MCMission Custom Extrusions INC | Fontana | CA | — | ◇ UNVERIFIED |
| MUMitek USA INC | Tampa | FL | — | ◇ UNVERIFIED |
| MTMitsubishi Turbocharger-engine America | Franklin | IN | — | ◇ UNVERIFIED |
| MKM K Chambers Co-north Branch | North Branch | MI | — | ◇ UNVERIFIED |
| MIModern Industries, - Roosevelt Facility | Tempe | AZ | — | ◇ UNVERIFIED |
| MMModern Machine & Tool Co., INC. | Newport News | VA | — | ◇ UNVERIFIED |
| MMModern Mechanical Fabrication INC | Champlain | NY | — | ◇ UNVERIFIED |
| MSModern Screw Products - Modern Screw Products | Saint Louis | MO | — | ◇ UNVERIFIED |
