| LCLynar Corporation | Allentown | PA | — | ◇ UNVERIFIED |
| LNLyn Nudd | Manitowoc | WI | — | ◇ UNVERIFIED |
| LILyons Industries INC. | Ebensburg | PA | — | ◇ UNVERIFIED |
| LILysander, Inc | Columbia | SC | — | ◇ UNVERIFIED |
| LILysander, Inc | Columbia | SC | — | ◇ UNVERIFIED |
| LILyten INC. | Lancaster | CA | — | ◇ UNVERIFIED |
| MAMachine and Fabrication Indust | Kent | WA | — | ◇ UNVERIFIED |
| MAMachine and Hydraulics, INC. | Gardendale | AL | — | ◇ UNVERIFIED |
| MCMachine Casting INC | Melrose | MN | — | ◇ UNVERIFIED |
| MCMachine Craft Northwest INC | Lebanon | OR | — | ◇ UNVERIFIED |
| MDMachine Design Services, Inc. | South Hutchinson | KS | — | ◇ UNVERIFIED |
| MMMachined Metals Manufacturing, INC. | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| MDMachine Dynamics Ultra Precision Cnc Machining, INC. | Westminster | CA | — | ◇ UNVERIFIED |
| MLMachine+ LLC | Green Bay | WI | — | ◇ UNVERIFIED |
| MPMachine Pro Technologies, INC. | Celina | OH | — | ◇ UNVERIFIED |
| MSMachinery Spare Parts & Supplies INC | Independence | MO | — | ◇ UNVERIFIED |
 Machine Tech, INC. | Adel | GA | — | ◇ UNVERIFIED |
| MTMachine Technology, INC. | Fenton | MO | — | ◇ UNVERIFIED |
| MTMachine Tool Design & Fab LLC | Fostoria | OH | — | ◇ UNVERIFIED |
| MTMachine Tool Technologies Research Foundation | Berkeley | CA | — | ◇ UNVERIFIED |
| MWMachine Worx of Cincinnati | Cincinnati | OH | — | ◇ UNVERIFIED |
| MMachinex | Bensenville | IL | — | ◇ UNVERIFIED |
| MIMachinex INC | Chula Vista | CA | — | ◇ UNVERIFIED |
| MCMachining & Coating Specialists, INC. | Leeds | AL | — | ◇ UNVERIFIED |
| MSMachining Specialists, INC. | Pearland | TX | — | ◇ UNVERIFIED |
 Machining Technologies INC | Long Lake | MN | — | ◇ UNVERIFIED |
| Machining Technologies LLC | Webster | MA | — | ◇ UNVERIFIED |
| MWMachining - Welding By Olsen INC | Cokato | MN | — | ◇ UNVERIFIED |
| MIMachinists INC | Seattle | WA | — | ◇ UNVERIFIED |
| MMachmotion | Newburg | MO | — | ◇ UNVERIFIED |
| MLMachprop LLC | Everett | WA | — | ◇ UNVERIFIED |
| MIMachtron INC | Fridley | MN | — | ◇ UNVERIFIED |
| MFMACI Fabricators, LLC | Columbiana | OH | — | ◇ UNVERIFIED |
| MPMaclean Power Systems | Trenton | TN | — | ◇ UNVERIFIED |
| MBMacomb Battery Service, LLC | Chesterfield | MI | — | ◇ UNVERIFIED |
 Maddox Industries, INC. | Monroe | GA | — | ◇ UNVERIFIED |
| MLMadewell, LLC | Houston | TX | — | ◇ UNVERIFIED |
| MLMadhuram, LLC | San Jose | CA | — | ◇ UNVERIFIED |
| MMMadison-smith Machine & Tool CO LLC | Glasgow | KY | — | ◇ UNVERIFIED |
| MIMadruga Iron Works, INC. | Tracy | CA | — | ◇ UNVERIFIED |
| MSMad Science Machining, LLC | Conroe | TX | — | ◇ UNVERIFIED |
| MMMagna Mirrors | Grand Rapids | MI | — | ◇ UNVERIFIED |
| MNMagnatron NC Pattern & Mfg, Inc. | Howell | MI | — | ◇ UNVERIFIED |
| MIMagnelink INC | Hillsboro | OR | — | ◇ UNVERIFIED |
| MSMagnetic Screw Machine Products, INC. | Marysville | OH | — | ◇ UNVERIFIED |
| MMMagnum Machine, INC. | Grand Junction | CO | — | ◇ UNVERIFIED |
| MAMagoo's Auto Parts | Hilo | HI | — | ◇ UNVERIFIED |
| MLMahaan LLC | Plain City | OH | — | ◇ UNVERIFIED |
| MMMainline Machine, INC. | Lafayette | LA | — | ◇ UNVERIFIED |
| MMMain Machine INC | Concord | CA | — | ◇ UNVERIFIED |
| MMMainstream Manufacturing LLC | Beaumont | TX | — | ◇ UNVERIFIED |
| MSMain Street Machining LLC | Kersey | PA | — | ◇ UNVERIFIED |
| MMMajaskis Machine Shop INC | Royalton | MN | — | ◇ UNVERIFIED |
| MMMajestic Machine & Engineering, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MMMajor Maintenance & Repair Building N1 | Kodiak Base | AK | — | ◇ UNVERIFIED |
| MMMajor Metals, INC. | Houston | TX | — | ◇ UNVERIFIED |
| MLMakjohn, L.L.C. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MEMalmberg Engineeringna INC. | Livermore | CA | — | ◇ UNVERIFIED |
| MLM & L Precision Machining, Inc. | Morgan Hill | CA | — | ◇ UNVERIFIED |
| MDMan Diesel & Turbo North America, INC. | Prattville | AL | — | ◇ UNVERIFIED |
| MLManitowoc Lifts and Manufacturing, LLC | Dekalb | IL | — | ◇ UNVERIFIED |
| MEManiva Engineering | Miami Gardens | FL | — | ◇ UNVERIFIED |
| MRManufacturing Resources International INC | Alpharetta | GA | — | ◇ UNVERIFIED |
| MTManufacturing Techniques INC | Ham Lake | MN | — | ◇ UNVERIFIED |
| MIManzke Investments, Inc. | Escondido | CA | — | ◇ UNVERIFIED |
| MMMaplewood Machine | North Dartmouth | MA | — | ◇ UNVERIFIED |
| MMMarble Machine, INC. | Danville | IL | — | ◇ UNVERIFIED |
| MTMarca Technologies LLC | Gorham | ME | — | ◇ UNVERIFIED |
| MHMarc Holt | San Diego | CA | — | ◇ UNVERIFIED |
| MMMarco Machine LLC | Morgantown | WV | — | ◇ UNVERIFIED |
| MMMarco Manufacturing CO. | Akron | OH | — | ◇ UNVERIFIED |
| MMMari Manufacturing & Engineering, INC. | West Chicago | IL | — | ◇ UNVERIFIED |
| MEMarine Equipment Supply LLC | Chula Vista | CA | — | ◇ UNVERIFIED |
| MPMarine Parts House | San Dimas | CA | — | ◇ UNVERIFIED |
| MMMarkco Machine Works INC. | Odessa | TX | — | ◇ UNVERIFIED |
| MMMark Manufacturing | Saint Paul | MN | — | ◇ UNVERIFIED |
| MCMark's Casa Chrysler / Jeep Mitsubishi | Albuquerque | NM | — | ◇ UNVERIFIED |
| MPMarlton Pike Precision | Cherry Hill | NJ | — | ◇ UNVERIFIED |
| MMMaro Manufacturing, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| MMMarquardt & Mueller Machining, INC | Woodstock | IL | — | ◇ UNVERIFIED |
| MRMarshall Ruby INC | Frostburg | MD | — | ◇ UNVERIFIED |
| MMMarshal Machinery INC | San Clemente | CA | — | ◇ UNVERIFIED |
| MPMartek Power, INC. | Torrance | CA | — | ◇ UNVERIFIED |
| MIMartin Interconnect Services, Inc. | Wichita | KS | — | ◇ UNVERIFIED |
| MTMarvell Technologies Group | San Jose | CA | — | ◇ UNVERIFIED |
| MMMarvel Machining Enterprises LLC | Bensenville | IL | — | ◇ UNVERIFIED |
| MDMarx Digital Mfg, Inc | Las Vegas | NV | — | ◇ UNVERIFIED |
| MMMason Machinings INC | Morristown | TN | — | ◇ UNVERIFIED |
| MLMasonmarine.net LLC | San Dimas | CA | — | ◇ UNVERIFIED |
| MOMason & Overstreet Welding & Machine Works, INC. | Pearl | MS | — | ◇ UNVERIFIED |
| MMMass. Machine, INC. | Westwood | MA | — | ◇ UNVERIFIED |
| MMMasteq Manufacturing, LLC | New Berlin | WI | — | ◇ UNVERIFIED |
| MMMastercraft Machine INC | West Valley City | UT | — | ◇ UNVERIFIED |
| MMMaster Machine, INC. | Houston | TX | — | ◇ UNVERIFIED |
| MMMaster Machine, INC. | Blaine | MN | — | ◇ UNVERIFIED |
| MMMaster Matic INC | Osseo | MN | — | ◇ UNVERIFIED |
 Masters Machine, LLC | Richmond | MI | — | ◇ UNVERIFIED |
| Masters Machine Shop INC | Mankato | MN | — | ◇ UNVERIFIED |
| MPMasters Precision Machining Inc. | Kent | OH | — | ◇ UNVERIFIED |
| MSMaster Swaging, INC. | Jackson Center | OH | — | ◇ UNVERIFIED |
