 Mayville Engineering Company, INC. (mec) - Virginia Main Plant - Wytheville | Wytheville | VA | — | ◇ UNVERIFIED |
| MVMay-wilbert Vault-pt Huron | Port Huron | MI | — | ◇ UNVERIFIED |
| MIMccullough Industries | Kenton | OH | — | ◇ UNVERIFIED |
| MMMcdonald Mfg INC | Artesia | CA | — | ◇ UNVERIFIED |
| MIMcgill INC | Marengo | IL | — | ◇ UNVERIFIED |
| MMMcmillan Mechanical & Machine Co., INC. | Shreveport | LA | — | ◇ 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 |
| MPMedford Plating INC | Medford | OR | — | ◇ UNVERIFIED |
| MIMedicote, INC. | Bristol | RI | — | ◇ UNVERIFIED |
| MBMedina Blanking INC. | Valley City | OH | — | ◇ UNVERIFIED |
| MPMedina Plating CORP Plant 2 | Medina | OH | — | ◇ UNVERIFIED |
| MCMedin CORP | Totowa | NJ | — | ◇ UNVERIFIED |
| MMMegawatt Machine Services | Somerset | NJ | — | ◇ UNVERIFIED |
| MBMel Bernie & CO INC | Burbank | CA | — | ◇ UNVERIFIED |
| MMMeminger Metal Finishing INC | Aledo | IL | — | ◇ UNVERIFIED |
| MMMercury Manufacturing Company | Wyandotte | MI | — | ◇ UNVERIFIED |
| MMMerit Metal Finishing Company, INC. | Bridgeport | CT | — | ◇ 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 |
| MFMessick Farm Equipment | Elizabethtown | PA | — | ◇ 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 |
| MFMetal Finishing CO | Passaic | NJ | — | ◇ UNVERIFIED |
| MFMetal Finishing Incorporated | Marysville | WA | — | ◇ UNVERIFIED |
 Metal Industries, INC. | Marion | NC | — | ◇ 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 |
| MRMetal Recovery Sys INC | Saint Louis | MO | — | ◇ UNVERIFIED |
| MSMetal Spinners | Angola | IN | — | ◇ UNVERIFIED |
| MSMetal Spinners | Angola | IN | — | ◇ UNVERIFIED |
| MUMetals USA Mobile | Mobile | AL | — | ◇ UNVERIFIED |
| MTMetal Touch Plating and Bumper Exchange | San Antonio | TX | — | ◇ UNVERIFIED |
| MMetalution | Holland | MI | — | ◇ UNVERIFIED |
| MLMetavation, LLC | Traverse City | MI | — | ◇ UNVERIFIED |
| MIMet-cycle INC | Middlesex | NJ | — | ◇ UNVERIFIED |
| MCMetform CORP | Savanna | IL | — | ◇ UNVERIFIED |
| MLMetform LLC | Mount Carroll | IL | — | ◇ UNVERIFIED |
| MPMetro Plating and Polishing Group INC. | Kensington | MD | — | ◇ UNVERIFIED |
| MPMetro Plating INC | Mesa | AZ | — | ◇ 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 |
| MCMichigan Chrome & Chemical Company | Detroit | MI | — | ◇ UNVERIFIED |
| MMicro | Largo | FL | — | ◇ UNVERIFIED |
| MLMicrobac Laboratories | Harrisburg | PA | — | ◇ UNVERIFIED |
| MIMicrobest INC | Waterbury | CT | — | ◇ UNVERIFIED |
| MIMicrofabrica INC | Van Nuys | CA | — | ◇ UNVERIFIED |
| MCMicrofin CORP | Providence | RI | — | ◇ UNVERIFIED |
| MOMicromatic Operations INC | Berne | IN | — | ◇ UNVERIFIED |
| MMMicron Manufacturing CO | Grand Rapids | MI | — | ◇ UNVERIFIED |
| MPMicro Platers Sales ( Dba Hajjar Plating Service) | Wayne | MI | — | ◇ UNVERIFIED |
| MMMicro-poise Measurements Systems LLC (1667080054) | Streetsboro | OH | — | ◇ UNVERIFIED |
| MMicrosemi | Scottsdale | AZ | — | ◇ UNVERIFIED |
| MAMid America Plating | Denver | CO | — | ◇ UNVERIFIED |
| MMMiddletown Metal Works, INC. | Berea | KY | — | ◇ UNVERIFIED |
| MDMi Dept/natural Resources and Environment | Paw Paw | MI | — | ◇ UNVERIFIED |
| MMMidland Metals Products | Chicago | IL | — | ◇ UNVERIFIED |
| MBMid-south Bolt & Screw CO INC | Nashville | TN | — | ◇ UNVERIFIED |
| MFMid-south Fabrications INC | Jemison | AL | — | ◇ UNVERIFIED |
| MPMidsouth Paving, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| MPMidsouth Paving, INC. - Montgomery Shop | Montgomery | AL | — | ◇ UNVERIFIED |
| MSMid South Plating | Wedowee | AL | — | ◇ UNVERIFIED |
| MMMidstate Manufacturing | Galesburg | IL | — | ◇ UNVERIFIED |
| MIMidstates Industrial Group INC | Clinton Township | MI | — | ◇ UNVERIFIED |
| MVMid Valley Anodizing | Burbank | CA | — | ◇ UNVERIFIED |
| MEMidwest Electric Products INC | Mankato | MN | — | ◇ UNVERIFIED |
| MSMidwestern Steel Fabricators Chicago LLC | Hammond | IN | — | ◇ UNVERIFIED |
| MIMidwest Ind & Dev LTD | Mcpherson | KS | — | ◇ UNVERIFIED |
| MPMidwest Plating CO INC | Saint Louis | MO | — | ◇ UNVERIFIED |
| MTMidwest Tankworks a Div Mississippi Tank CO | Vincennes | IN | — | ◇ UNVERIFIED |
| MAMike's Anodizing CO | Chicago | IL | — | ◇ UNVERIFIED |
| MAMikron Assembly Technology | Aurora | CO | — | ◇ UNVERIFIED |
| MPMillenium Plating Company | Lowell | MA | — | ◇ UNVERIFIED |
| MIMiller Industrial | Kokomo | IN | — | ◇ UNVERIFIED |
| MPMiller Plating & Metal Finishing LLC | Evansville | IN | — | ◇ UNVERIFIED |
 Miller Welding & Machine CO | Brookville | PA | — | ◇ UNVERIFIED |
| MCMills Chrome Plating & Polishing | Sophia | WV | — | ◇ UNVERIFIED |
| MCMills CO | Upper Sandusky | OH | — | ◇ UNVERIFIED |
| MMMinnesota Metal Finishing INC - Plant 1 | Minneapolis | MN | — | ◇ UNVERIFIED |
| MMMinnesota Metal Finishing Pla | Maple Grove | MN | — | ◇ UNVERIFIED |
| MUMinova USA INC | Grundy | VA | — | ◇ UNVERIFIED |
| MIMirror Industries | Houston | TX | — | ◇ UNVERIFIED |
| MCMission Custom Extrusions INC | Fontana | CA | — | ◇ UNVERIFIED |
| MMMissouri Mpp CORP | Kansas City | KS | — | ◇ UNVERIFIED |
| MUMitek USA INC | Tampa | FL | — | ◇ UNVERIFIED |
| MTMitsubishi Turbocharger-engine America | Franklin | IN | — | ◇ UNVERIFIED |
| MKM K Chambers Co-north Branch | North Branch | MI | — | ◇ UNVERIFIED |
| MDMk Diamond Products | Torrance | CA | — | ◇ UNVERIFIED |
| MMM & M Metals INC | Cincinnati | OH | — | ◇ UNVERIFIED |
