| MPMicro Plastics INC | Flippin | AR | — | ◇ UNVERIFIED |
| MMMidwest Metallurgical Laboratory INC | Marshall | MI | — | ◇ UNVERIFIED |
| MMMidwest Metallurgical Laboratory Site | Marshall | MI | — | ◇ UNVERIFIED |
| MIMikron Industries | Kent | WA | — | ◇ UNVERIFIED |
| MIMikron Industries INC | Richmond | KY | — | ◇ UNVERIFIED |
| MWMilgard Windows and Doors | Tualatin | OR | — | ◇ UNVERIFIED |
| MMMiller Manufacturing | Washougal | WA | — | ◇ UNVERIFIED |
| MCMillison Casting Technology, LLC | Sallisaw | OK | — | ◇ UNVERIFIED |
 Miniature Precision Components Janesville | Janesville | WI | — | ◇ UNVERIFIED |
| MMMinnesota Medtec INC | Osseo | MN | — | ◇ UNVERIFIED |
| MPMi Profiles LLC - Millersburg | Millersburg | PA | — | ◇ UNVERIFIED |
| MPMi Profiles Llc/millersburg Plt | Millersburg | PA | — | ◇ UNVERIFIED |
| MPMission Plastics INC | Ontario | CA | — | ◇ UNVERIFIED |
| MKMitsui Kinzoku Die-casting Technology America, INC | Griffin | GA | — | ◇ UNVERIFIED |
 M&l Precision Machining INC | Morgan Hill | CA | — | ◇ UNVERIFIED |
| MMM & M Die Cast | Bridgman | MI | — | ◇ UNVERIFIED |
| MNM & N Plastics | El Paso | TX | — | ◇ UNVERIFIED |
| MPModern Pro Packaging INC | Compton | CA | — | ◇ UNVERIFIED |
| MFMolded Fiber Glass Alabama LLC | Opp | AL | — | ◇ UNVERIFIED |
| MBMolecular Bioproducts INC Dba Thermo Fishier Scientific-petaluma | Petaluma | CA | — | ◇ UNVERIFIED |
| MMMonarch Manufacturing, INC. | Belcamp | MD | — | ◇ UNVERIFIED |
| MAMonotrac Articulation LLC | Midvale | UT | — | ◇ UNVERIFIED |
| MCMonroe Custom Utility Bodies, INC. | Greenfield | IN | — | ◇ UNVERIFIED |
| MMMontague Machine CO | Montague (turners Falls) | MA | — | ◇ UNVERIFIED |
| MHMorgan Hill Plastics | Morgan Hill | CA | — | ◇ UNVERIFIED |
| MCMorton Custom Plastics | Saint Matthews | SC | — | ◇ UNVERIFIED |
| MCMorton Custom Plastics | Saint Matthews | SC | — | ◇ UNVERIFIED |
| MAMoundhouse Aluminum Foundry | Carson City | NV | — | ◇ UNVERIFIED |
| MCMpg Casting Technologies | Kingsford | MI | — | ◇ UNVERIFIED |
| MLMr Longarm INC | Greenwood | MO | — | ◇ UNVERIFIED |
| MMMsi Molding Solutions, INC. | Rome | NY | — | ◇ UNVERIFIED |
| MUMultina USA | Plattsburgh | NY | — | ◇ UNVERIFIED |
| MCMunicipal Castings INC | Madison | MN | — | ◇ UNVERIFIED |
| MCMuskegon Castings Corporation/port City Metal Products | Muskegon | MI | — | ◇ UNVERIFIED |
| MFMvp Food Packaging | Mount Vernon | KY | — | ◇ UNVERIFIED |
| MCMwm Corporation | Phoenix | AZ | — | ◇ UNVERIFIED |
| MFMyers Fiberglass | Visalia | CA | — | ◇ UNVERIFIED |
| MSMyers & Sons Hi-way Safety INC | Napa | CA | — | ◇ UNVERIFIED |
| MAMzd Acquisitions INC Dba Moz Designs INC | Oakland | CA | — | ◇ UNVERIFIED |
| NMNakanishi Manufacturing Corporation | Winterville | GA | — | ◇ UNVERIFIED |
| NCNc Coatings, LLC | Staley | NC | — | ◇ UNVERIFIED |
| NFNeenah Foundry CO - Plants 2 and 3 (w2179) | Neenah | WI | — | ◇ UNVERIFIED |
| NCNelipak Corporation | Cranston | RI | — | ◇ UNVERIFIED |
 New Bedford Technology LLC | Winchester | VA | — | ◇ UNVERIFIED |
| NCNew Castings Incorporated | Spokane | WA | — | ◇ UNVERIFIED |
| NCNew Castle Foundry/new Castle | New Castle | PA | — | ◇ UNVERIFIED |
| NHNew Haven Foundry | New Haven | MI | — | ◇ UNVERIFIED |
| NSNew Surface-odessa | Odessa | MO | — | ◇ UNVERIFIED |
| NVNew Vermillion Iron Works, INC. | Hoopeston | IL | — | ◇ UNVERIFIED |
| NKNifco Ktw | Toccoa | GA | — | ◇ UNVERIFIED |
