| MDM & D Machine Company | Linthicum | MD | — | ◇ UNVERIFIED |
| MDM - D Machining | Truman | MN | — | ◇ UNVERIFIED |
| MMMeadow Manufacturing, Inc. | Berlin | CT | — | ◇ UNVERIFIED |
| MDMechanical Designs of Virginia | Stuart | VA | — | ◇ UNVERIFIED |
| MRMechanical Repair & Engineering, L.p. | La Porte | TX | — | ◇ UNVERIFIED |
| MCMechanovent Corporation Dba the New York Blower Company | Effingham | IL | — | ◇ UNVERIFIED |
| MMMechura Machine Works, LLC | Victoria | TX | — | ◇ UNVERIFIED |
| MIMecpro INC | Santa Clara | CA | — | ◇ UNVERIFIED |
| MMMedley Machine Shop INC. | Medley | FL | — | ◇ UNVERIFIED |
| MIMedplast INC. | West Berlin | NJ | — | ◇ UNVERIFIED |
| MTMedway Tool Machining, LLC | Troy | OH | — | ◇ UNVERIFIED |
| MTMega Tool & Mfg CORP | Elmira | NY | — | ◇ UNVERIFIED |
| MLMelAnna LLC | Cambridge | MN | — | ◇ UNVERIFIED |
| MMMelissa M Riley | Portland | OR | — | ◇ UNVERIFIED |
| MLMenco, LLC | Wausaukee | WI | — | ◇ UNVERIFIED |
| MTMendeola Transaxles INC | San Diego | CA | — | ◇ UNVERIFIED |
| MFMercer Forge Corporation | Wheatland | PA | — | ◇ UNVERIFIED |
| MMMercer Machine and Tool LLC | Hamilton | NJ | — | ◇ UNVERIFIED |
| MMMerchant Mfg INC | Maple Grove | MN | — | ◇ UNVERIFIED |
| MIMeritor Industrial Products LLC | Chicago | IL | — | ◇ UNVERIFIED |
| MSMerit Specialities-merit Specialities | Saint Louis | MO | — | ◇ UNVERIFIED |
| MTMeritt Tool & Die | Vermontville | MI | — | ◇ UNVERIFIED |
| MTMeriwether Tool | Fort Wayne | IN | — | ◇ UNVERIFIED |
| MMMerrick Machine CO | Alda | NE | — | ◇ UNVERIFIED |
| MTMerritt Tool & Manufacturing, INC. | Sussex | WI | — | ◇ UNVERIFIED |
| MPMeschkat Precision Machining INC | Valencia | CA | — | ◇ UNVERIFIED |
| MAMetal Arc INC | Muskegon | MI | — | ◇ UNVERIFIED |
| MEMetalcraft Enterprises | Decatur | IN | — | ◇ UNVERIFIED |
| MMMetalcraft Machining | Southbridge | MA | — | ◇ UNVERIFIED |
| MFMetal Fab Products, Inc. | Odessa | TX | — | ◇ UNVERIFIED |
| MCMetalite Corporation | Fort Worth | TX | — | ◇ UNVERIFIED |
| MLMetal Line CORP | Manistee | MI | — | ◇ UNVERIFIED |
| MMMetal & Machinery, INC. | La Fayette | GA | — | ◇ UNVERIFIED |
| MIMetalogic Industries LLC | Southbridge | MA | — | ◇ UNVERIFIED |
| MPMetal Parts | Cypress | CA | — | ◇ UNVERIFIED |
| MLMetalpro LLC | Old Saybrook | CT | — | ◇ UNVERIFIED |
| MIMetal-Tech, Inc. | New Castle | DE | — | ◇ UNVERIFIED |
| MTMetal Tech Midwest Incorporated | Joplin | MO | — | ◇ UNVERIFIED |
| MIMetco Incorporated | Anderson | SC | — | ◇ UNVERIFIED |
| MCMetem Corporation | Parsippany | NJ | — | ◇ UNVERIFIED |
| MDMethods Distributors and Manufacturers, INC. | Fox Lake | IL | — | ◇ UNVERIFIED |
| MMMetro Machine - Engineering CORP | Eden Prairie | MN | — | ◇ UNVERIFIED |
| MSMetro South Machining INC | Burnsville | MN | — | ◇ UNVERIFIED |
| MWMetro Welding & Fabricating, INC. | Big Bend | WI | — | ◇ UNVERIFIED |
| MPMetz Properties LLC | New River | AZ | — | ◇ UNVERIFIED |
| MMM.g. Manufacturing LLC | Blanding | UT | — | ◇ UNVERIFIED |
| MVMiami Valley Manufacturing & Assembly, INC. | Dayton | OH | — | ◇ UNVERIFIED |
| MJMichael James Properties, LLC | Gainesville | GA | — | ◇ UNVERIFIED |
| MMMichael Marhofer | Cicero | IL | — | ◇ UNVERIFIED |
| MMMichael Mccrorey | Myrtle Point | OR | — | ◇ UNVERIFIED |
| MMMichael Mccrorey | Myrtle Point | OR | — | ◇ UNVERIFIED |
| MPMichael Piazza, LLC | Tampa | FL | — | ◇ UNVERIFIED |
| MSMichael Spencer and Karen Spencer, Trustees of the Michael Alan Spencer and Kare | Temecula | CA | — | ◇ UNVERIFIED |
| MSMichael Steiro | Lebanon | MO | — | ◇ UNVERIFIED |
| MTMichael Tareski | Medical Lake | WA | — | ◇ UNVERIFIED |
| MWMichael Wynakos | Monroe | WA | — | ◇ UNVERIFIED |
 Microcast Technologies | Avenel | NJ | — | ◇ UNVERIFIED |
| MOMicrocoat of Santa Rosa | Santa Rosa | CA | — | ◇ UNVERIFIED |
| MLMicro-fab LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| MFMicro Finish & Coating INC. | Kansas City | MO | — | ◇ UNVERIFIED |
| MAMicroflex Automotive | Ormond Beach | FL | — | ◇ UNVERIFIED |
| MMMicro Machine INC | Greenfield | MN | — | ◇ UNVERIFIED |
| MMMicromatics Machine CO | Hollis | NH | — | ◇ UNVERIFIED |
| MMMicro Mfg. INC. | Caledonia | MI | — | ◇ UNVERIFIED |
| MMicromist | Calimesa | CA | — | ◇ UNVERIFIED |
| MPMicron Precision LLC Dba King Machine Fayetteville | Fayetteville | NC | — | ◇ UNVERIFIED |
| MPMicro Parts INC | Eagan | MN | — | ◇ UNVERIFIED |
| MSMicro Space Products | Torrance | CA | — | ◇ UNVERIFIED |
 Microteq Engineering INC | San Antonio | TX | — | ◇ UNVERIFIED |
 Microtool INC. | Shawnee Mission | KS | — | ◇ UNVERIFIED |
| MMMid-american Machine & Equipment, INC. | Le Roy | KS | — | ◇ UNVERIFIED |
| MCMid City Precision INC | Saint Louis Park | MN | — | ◇ UNVERIFIED |
| MCMid City Precision LLC | Wausau | WI | — | ◇ UNVERIFIED |
| MMMiddleton Machining & Welding, INC. | Middleton | WI | — | ◇ UNVERIFIED |
| MKMid Kansas Machine INC. | Mcpherson | KS | — | ◇ UNVERIFIED |
| MPMidsouth Power Equipment Company, INC. | Greensboro | NC | — | ◇ UNVERIFIED |
| MMMid-state Machine & Fabricating Corporation | Bartow | FL | — | ◇ UNVERIFIED |
| MMMid-state Machine Shop, INC. | East Dublin | GA | — | ◇ UNVERIFIED |
| MMMid-state Manufacturing, LLC | Mt. Ulla | NC | — | ◇ UNVERIFIED |
| MMMidway Machine & Welding Shop, INC. | Burleson | TX | — | ◇ UNVERIFIED |
| MMMidwest Machine, LLC | Beloit | WI | — | ◇ UNVERIFIED |
| MMMidwest Machining INC. | Harper | KS | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing Corporation | Omaha | NE | — | ◇ UNVERIFIED |
| MMMidwest Metal Works INC | Grove City | MN | — | ◇ UNVERIFIED |
 Midwest Precision Tooling and Manufacturing LLC | Hutchinson | MN | — | ◇ UNVERIFIED |
| Midwest Precision Tooling and Manufacturing LLC | Buffalo | MN | — | ◇ UNVERIFIED |
| Midwest Precision Tooling and Manufacturing LLC | New Ulm | MN | — | ◇ UNVERIFIED |
| MPMidwest Production Solutions | Moran | KS | — | ◇ UNVERIFIED |
| MPMidwest Pro Manufacturing INC. | Rock Valley | IA | — | ◇ UNVERIFIED |
| MRMidwest Remanufacturing, LLC | Bedford Park | IL | — | ◇ UNVERIFIED |
| MDMike Dyell Machine Shop & Hydraulics, in | Rialto | CA | — | ◇ UNVERIFIED |
| MMMike's Machine Shop | Licking | MO | — | ◇ UNVERIFIED |
| MPMike's Performance & Machine Shop | Las Cruces | NM | — | ◇ UNVERIFIED |
| MHMilans Holdings Enterprises LLC | Doral | FL | — | ◇ UNVERIFIED |
| MMMile-hi Machine, INC. | Arvada | CO | — | ◇ UNVERIFIED |
| MMMiles Machine LLC | Waterboro | ME | — | ◇ UNVERIFIED |
| MMMillcraft Mfg INC | San Jose | CA | — | ◇ UNVERIFIED |
| MMMillennium Machining, INC | Lewiston | UT | — | ◇ UNVERIFIED |
| MPMillennium Power Services, Inc. | Westfield | MA | — | ◇ UNVERIFIED |
| MMMiller Machined Products, INC. | Endeavor | WI | — | ◇ UNVERIFIED |
