| MTMasterform Tool Company | Franklin Park | IL | — | ◇ UNVERIFIED |
| MDMathias Die Company, Inc. | Golden Valley | MN | — | ◇ UNVERIFIED |
| MDMathias Die Company INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| MMMatt's Metal Stitch LLC | Hamburg | NY | — | ◇ UNVERIFIED |
| MMaudlin | Kemah | TX | — | ◇ UNVERIFIED |
 Mayville Engineering Company, INC. | Beaver Dam | WI | — | ◇ UNVERIFIED |
| MIM-b Industries, INC. | Rosman | NC | — | ◇ UNVERIFIED |
| MTMekra Tool and Mold LLC | Ridgeway | SC | — | ◇ UNVERIFIED |
| MMMetal Masters | San Antonio | TX | — | ◇ UNVERIFIED |
| MIMetalon Industries INC | Croswell | MI | — | ◇ UNVERIFIED |
| MPMetal Punch Corporation | Cadillac | MI | — | ◇ UNVERIFIED |
| MQMetal Quest INC | Portland | TN | — | ◇ UNVERIFIED |
| MWMetal Works INC. | Londonderry | NH | — | ◇ UNVERIFIED |
| MWMetal Works of High Point, Inc. | High Point | NC | — | ◇ UNVERIFIED |
| MTMet-pro Technologies, LLC | Telford | PA | — | ◇ UNVERIFIED |
| MMMetro Mold & Design LLC - Building 1 | Rogers | MN | — | ◇ UNVERIFIED |
| MFM & F Machine & Tool INC | Temperance | MI | — | ◇ UNVERIFIED |
| MEMichalski Enterprises INC Dba Tool Craft | Lansing | MI | — | ◇ UNVERIFIED |
| MMMic-ray Metal Products INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| MMMicron Machine CO | Poway | CA | — | ◇ UNVERIFIED |
| MPMicron Precision, LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| MIMicrotenths INC Dba Detail Tool & Engineering INC | Blaine | MN | — | ◇ UNVERIFIED |
| MTMidland Technologies INC | Otsego | MN | — | ◇ UNVERIFIED |
| MMMid-Michigan Machine Tool, LLC | Gladwin | MI | — | ◇ UNVERIFIED |
| MFMidwest Forging Die Dba Water Works of Rockford | Rockford | IL | — | ◇ UNVERIFIED |
| MMMidwest Machining INC Dba Self Lube Mold and Die Components | Coopersville | MI | — | ◇ UNVERIFIED |
| MSMidwest Steel Rule Cutting Die, INC. | Indianapolis | IN | — | ◇ UNVERIFIED |
| MEMind's Eye Companies Worlwide, INC. | Marietta | GA | — | ◇ UNVERIFIED |
| MUMitek Usa, INC. | Tolleson | AZ | — | ◇ UNVERIFIED |
| MIMjolnir Industries, LLC | Oxnard | CA | — | ◇ UNVERIFIED |
| MJM & J Sqd. LLC | Floyd | VA | — | ◇ UNVERIFIED |
| MTMk Tooling INC | Portland | OR | — | ◇ UNVERIFIED |
| MAMmgc Acquisition, LLC | Elmhurst | IL | — | ◇ UNVERIFIED |
| MJM&m Jig Grinding INC | Santa Clara | CA | — | ◇ UNVERIFIED |
| MLMpi LLC | Southfield | MI | — | ◇ UNVERIFIED |
| MRM R Mold & Engineering Corporation | Brea | CA | — | ◇ UNVERIFIED |
| MMMueller Machine & Tool CO | Saint Louis | MO | — | ◇ UNVERIFIED |
| MMMultisource Manufacturing LLC | Chisago City | MN | — | ◇ UNVERIFIED |
| MMMurray Machine Tool CO | Gallatin | TN | — | ◇ UNVERIFIED |
| MAMwc Acquisitions, LLC | Atkinson | NE | — | ◇ UNVERIFIED |
| NCNas Cp CORP | College Point | NY | — | ◇ UNVERIFIED |
| NPNational Precision Machining Service, INC. | Franklin | TN | — | ◇ UNVERIFIED |
| NSNational Sintered Alloys Incorporated | Clinton | CT | — | ◇ UNVERIFIED |
| NWNational Wire & Metal Technologies, INC. | Jamestown | NY | — | ◇ UNVERIFIED |
| NINci INC Dba Unique Tool | Hutchinson | MN | — | ◇ UNVERIFIED |
| NBNewell Brands - Fishers | Fishers | IN | — | ◇ UNVERIFIED |
| NLNewest LLC | Waukesha | WI | — | ◇ UNVERIFIED |
 New York Stampings,inc. | Lima | NY | — | ◇ UNVERIFIED |
| NMNexgen Mold and Tool | New Albany | IN | — | ◇ UNVERIFIED |
| NMNichols Mold, Inc. | Ravenna | OH | — | ◇ UNVERIFIED |
