| MMMid-State Metal Works | Blaine | MN | — | ◇ UNVERIFIED |
| MHMidwesco Holdings, Inc. | Joliet | IL | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing and Mechanical INC | Nashwauk | MN | — | ◇ UNVERIFIED |
 Midwest Metal Fabrication LLC | Alda | NE | — | ◇ UNVERIFIED |
| MMMidwest Metal Fabricators, LLC | Wapakoneta | OH | — | ◇ UNVERIFIED |
| MMMidwest Metal Works, LLC | Sparta | MO | — | ◇ UNVERIFIED |
| MSMidwest Stairs & Iron, Inc. | Milwaukee | WI | — | ◇ UNVERIFIED |
| MWMidwest Welding Solutions CORP | Waukesha | WI | — | ◇ UNVERIFIED |
| MWMidwest Wrought Iron INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| MBMike Boone Properties, LLC, a California Limited Liability Company | Garden Grove | CA | — | ◇ UNVERIFIED |
| MOMike Owen Fabrication | Bakersfield | CA | — | ◇ UNVERIFIED |
| MIMikris, INC. | Menomonee Falls | WI | — | ◇ UNVERIFIED |
| MMMiktin Metals, Inc. | Twinsburg | OH | — | ◇ UNVERIFIED |
| MIMiller Industrial | Kokomo | IN | — | ◇ UNVERIFIED |
| MMMiller & Mapco Hi Tech Fab, LLC | Lexington | OH | — | ◇ UNVERIFIED |
| MMMiller Method Imports INC. | Miami Beach | FL | — | ◇ UNVERIFIED |
| MMMiller Mfg CORP | Nappanee | IN | — | ◇ UNVERIFIED |
| MCMills CO | Upper Sandusky | OH | — | ◇ UNVERIFIED |
| MIMillville Iron Works Co., INC. | Millville | NJ | — | ◇ UNVERIFIED |
 Mil Spec Heat Treating | Huntington Beach | CA | — | ◇ UNVERIFIED |
| MWMineral Wells | Mineral Wells | TX | — | ◇ UNVERIFIED |
| MMMinnesota Metal Fabrications INC. | Minneapolis | MN | — | ◇ UNVERIFIED |
| MMMinnesota Metals INC | Spring Valley | MN | — | ◇ UNVERIFIED |
| MTMission Tool & Mfg CO INC | Hayward | CA | — | ◇ UNVERIFIED |
| MLMississippi Laser, Inc. | Stockton | IA | — | ◇ UNVERIFIED |
| MPMissouri Pressed Metals INC. | Sedalia | MO | — | ◇ UNVERIFIED |
| MMMisty Mountain Industries INC. | Mountain Home | AR | — | ◇ UNVERIFIED |
| MMiswaco | Tulsa | OK | — | ◇ UNVERIFIED |
| MDMitchell & Duce INC Dba Mitchell Bros | Buena Park | CA | — | ◇ UNVERIFIED |
| MMMitten Manufacturing | Syracuse | NY | — | ◇ UNVERIFIED |
| M1MK 1 Studio, LLC | West Jordan | UT | — | ◇ UNVERIFIED |
| MMMk Middleton INC. | Hereford | TX | — | ◇ UNVERIFIED |
| MIMks Instruments INC Broomfield | Broomfield | CO | — | ◇ UNVERIFIED |
| MTMk Tools & Abrasives INC | Bell | CA | — | ◇ UNVERIFIED |
| MTMK Trempe Corporation | Sidney | OH | — | ◇ UNVERIFIED |
| MEMl & Es Ventures LLC | Troutdale | OR | — | ◇ UNVERIFIED |
| MEMl & Es Ventures LLC | Wood Village | OR | — | ◇ UNVERIFIED |
| MLM - L Industries INC | Rogers | MN | — | ◇ UNVERIFIED |
| MEMLM Enterprises LLC | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MIMm Industries, INC. | Salem | OH | — | ◇ UNVERIFIED |
| MMM & M Manufacturing, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| MMM & M Manufacturing, INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| MPMobile Pulley Marine Services | Mobile | AL | — | ◇ UNVERIFIED |
| MLMobilitybridge LLC | Dayton | OH | — | ◇ UNVERIFIED |
| MIMocorp INC | Anoka | MN | — | ◇ UNVERIFIED |
| MIMocorp INC | Elk River | MN | — | ◇ UNVERIFIED |
| MFModel Finishing Co/phila | Philadelphia | PA | — | ◇ UNVERIFIED |
| MEModern Equipment Company | Omaha | NE | — | ◇ UNVERIFIED |
| MFModern Fabricating INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| MFModern Faucet Mfg Company | Los Angeles | CA | — | ◇ UNVERIFIED |
 Modern Machine and Metal Fabricators, INC. | Winston Salem | NC | — | ◇ UNVERIFIED |
| MMModern Mechanical Fabrication INC | Champlain | NY | — | ◇ UNVERIFIED |
| MCModineer Coatings Division South | South Bend | IN | — | ◇ UNVERIFIED |
 Modine Manufacturing CO | Clinton | TN | — | ◇ UNVERIFIED |
| MMModular Mining Systems, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| MMMoffat Mine Service INC. | Craig | CO | — | ◇ UNVERIFIED |
| MMMohawk Metal Company | Eugene | OR | — | ◇ UNVERIFIED |
| MMMolt Manufacturing, INC. | Spalding | NE | — | ◇ UNVERIFIED |
| MPMonitor Products INC | Hauppauge | NY | — | ◇ UNVERIFIED |
| MSMonroe Staffing Services, LLC | Hudson | MA | — | ◇ UNVERIFIED |
| MLMonrreal-Macias LLC | Bell Gardens | CA | — | ◇ UNVERIFIED |
| MFMontell Fabrication and Rebuild, LLC | Deming | NM | — | ◇ UNVERIFIED |
| MMMontel Metals | Jeffersonville | IN | — | ◇ UNVERIFIED |
| MDMoore Dry Kiln Company of Ore* | Memphis | TN | — | ◇ UNVERIFIED |
| MMMorehead Machining, INC. | Morehead | KY | — | ◇ UNVERIFIED |
| MFMorgan Fabrication | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MPMorgan Performance | Spring | TX | — | ◇ UNVERIFIED |
| MIMoritz International INC. (0370010048) | Mansfield | OH | — | ◇ UNVERIFIED |
| MIMorrill Industries, INC | Escalon | CA | — | ◇ UNVERIFIED |
| MMMorris Metal Shaping LLC | Emeryville | CA | — | ◇ UNVERIFIED |
| MMMortech Manufacturing | Azusa | CA | — | ◇ UNVERIFIED |
| MCMotor City Racks, LLC | Laurens | SC | — | ◇ UNVERIFIED |
| MFMountain Forge Inc, the | Truckee | CA | — | ◇ UNVERIFIED |
| MPMountain Performance INC | Draper | UT | — | ◇ UNVERIFIED |
| MWMpack Winthrop Corporation | Alsip | IL | — | ◇ UNVERIFIED |
| MMM.P.H. Metals Processing Inc. | Mechanicville | NY | — | ◇ UNVERIFIED |
| MMMp Magnetics | Fort Worth | TX | — | ◇ UNVERIFIED |
| MSMp Steel Corporation | Monaca | PA | — | ◇ UNVERIFIED |
| MAMpt America Corporation Dba Metal Plasma Technology | Valencia | CA | — | ◇ UNVERIFIED |
| MBMr. Bronze CO. LLC | Miami Springs | FL | — | ◇ UNVERIFIED |
| MLMsatt, LLC | Richmond | IL | — | ◇ UNVERIFIED |
| MSM. Swift & Sons Gold Leaf | Hartford | CT | — | ◇ UNVERIFIED |
| MSMulich Services LLC | Bonner Springs | KS | — | ◇ UNVERIFIED |
| MIMunroe, Incorporated | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MLMurphree Leasing LLC | Bristol | WI | — | ◇ UNVERIFIED |
| MTMuskogee Technology | Atmore | AL | — | ◇ UNVERIFIED |
| MWM - W Fab INC. Dba Ace Fabrication and Machine, in | Smithfield | NC | — | ◇ UNVERIFIED |
| MIMyrtle Industries INC | Jackson | MI | — | ◇ UNVERIFIED |
| MIMy-signguy.com, INC. | Glenview | IL | — | ◇ UNVERIFIED |
| NMNambe Mills, INC. | Espanola | NM | — | ◇ UNVERIFIED |
| NMN.a. Metal Services INC. | Rockland | MA | — | ◇ UNVERIFIED |
| NMNano Manufacturing INC | North Branch | MN | — | ◇ UNVERIFIED |
| NPNanoprecision Products | El Segundo | CA | — | ◇ UNVERIFIED |
| NCNapa County Roads | Napa | CA | — | ◇ UNVERIFIED |
| NMNational Metal Fabrication INC | Ontario | CA | — | ◇ UNVERIFIED |
| NMNational Metal Processing INC | Richmond | KY | — | ◇ UNVERIFIED |
| NPNational Products INC 1025 S Elmgrove St | Seattle | WA | — | ◇ UNVERIFIED |
| NPNational Products S Elmgrove | Seattle | WA | — | ◇ UNVERIFIED |
| NSNational Sintered Alloys Incorporated | Clinton | CT | — | ◇ UNVERIFIED |
| NSNational Sintered Alloys Incorporated | Clinton | CT | — | ◇ UNVERIFIED |
