Madison Defense Research LLC | Waunakee | WI | — | ● ACTIVE |
| MIMagline INC | Standish | MI | 100–499 | ● ACTIVE |
Magna Tool INC. | Cypress | CA | — | ● ACTIVE |
Magnetic Systems International, INC | Boyne City | MI | — | ● ACTIVE |
| MMMagnum Machine INC. | Raymond | NH | — | ● ACTIVE |
Malone Industrial Machine, L.l.c. | Deer Park | TX | 20–99 | ● ACTIVE |
Maney Aircraft, INC. | Ontario | CA | — | ● ACTIVE |
| MTManitowoc Tool & Machining LLC | Manitowoc | WI | 100–499 | ● ACTIVE |
Mantel Machine Products INC. | Menomonee Falls | WI | 20–99 | ● ACTIVE |
Manufacturing Sciences Corporation | Oak Ridge | TN | — | ● ACTIVE |
| MSManufacturing Solutions, INC | Newton | KS | 20–99 | ● ACTIVE |
M.a.r.'s Engineering Company, INC. | San Leandro | CA | — | ● ACTIVE |
| MMMarten Machining, INC. | Stevens Point | WI | 20–99 | ● ACTIVE |
Martinez and Turek, INC. | Rialto | CA | — | ● ACTIVE |
Martin Machine & Welding INC | Halstead | KS | — | ● ACTIVE |
Marton Precision Manufacturing, LLC | Fullerton | CA | 20–99 | ● ACTIVE |
Marx Digital Mfg. INC. | Santa Clara | CA | — | ● ACTIVE |
Masterbilt INC | South Bend | IN | — | ● ACTIVE |
Master Machining, INC | Castle Hayne | NC | — | ● ACTIVE |
Master Precision Machining | Santa Clara | CA | — | ● ACTIVE |
Master Research & Manufacturing, INC. | Norwalk | CA | — | ● ACTIVE |
Masters Machine Company | Bristol | ME | 20–99 | ● ACTIVE |
Matenaer CORP | West Bend | WI | — | ● ACTIVE |
Material Alteration Company, LLC | Houston | TX | — | ● ACTIVE |
Mauell CORP | Dillsburg | PA | 20–99 | ● ACTIVE |
Maynard INC | Fayetteville | AR | — | ● ACTIVE |
May Tool and Mold Co., INC. | Kansas City | MO | — | ● ACTIVE |
M & B Machine, INC. | Carlisle | PA | 20–99 | ● ACTIVE |
Mckenzie Machining INC | San Jose | CA | — | ● ACTIVE |
| MBMcmellon Bros., Incorporated | Stratford | CT | 20–99 | ● ACTIVE |
Mcnally Industries, LLC | Grantsburg | WI | — | ● ACTIVE |
Mcneil Industries INC | Painesville | OH | 20–99 | ● ACTIVE |
| MPMdc Precision LLC | Hayward | CA | — | ● ACTIVE |
Md Plastics INC. | Columbiana | OH | — | ● ACTIVE |
Mechanical Analysis/repair, INC. | Lodi | CA | — | ● ACTIVE |
Mechanical Development Company, Incorporated | Salem | VA | 20–99 | ● ACTIVE |
| MDMechanical Devices CO | Bloomington | IL | 100–499 | ● ACTIVE |
Mega Precision LLC | Newington | CT | — | ● ACTIVE |
Megatech Manufacturing LLC | Westminster | CA | — | ● ACTIVE |
Memcor INC | Huntington | IN | — | ● ACTIVE |
Menze Precision Machining, LLC | Winter Haven | FL | — | ● ACTIVE |
Mercury Machine Works LLC | Spring | TX | — | ● ACTIVE |
Mercury Products CORP | Schaumburg | IL | — | ● ACTIVE |
Merit Gage INC | Minneapolis | MN | — | ● ACTIVE |
Mesa Custom Machining CORP | Gilbert | AZ | — | ● ACTIVE |
Meta Fab, INC | Hillsboro | OR | — | ● ACTIVE |
Metal Essence, INC. | Longwood | FL | — | ● ACTIVE |
| MEMetal Etch Services INC | San Marcos | CA | 20–99 | ● ACTIVE |
Metalex Manufacturing INC | Cincinnati | OH | 100–499 | ● ACTIVE |
Metalform Industries, INC. | Wichita | KS | — | ● ACTIVE |
Metal Forming & Coining LLC | Maumee | OH | — | ● ACTIVE |
Metalid Manufacturing INC | Pacoima | CA | — | ● ACTIVE |
Metal Impact LLC | Elk Grove Village | IL | — | ● ACTIVE |
Metallic Ladder Manufacturing CORP. | Randolph | NY | — | ● ACTIVE |
Metalmite CORP | Rochester | MI | — | ● ACTIVE |
| MPMetal Processing, INC | Radford | VA | — | ● ACTIVE |
Metalquest Unlimited, INC | Hebron | NE | — | ● ACTIVE |
Metal Tech INC | Gulfport | MS | — | ● ACTIVE |
Meta Manufacturing CORP | Blue Ash | OH | — | ● ACTIVE |
| MIMetamora Industries, LLC | Metamora | IL | 20–99 | ● ACTIVE |
Met International Trading Company, INC. | Houston | TX | — | ● ACTIVE |
Metplas INC | Natrona Heights | PA | 20–99 | ● ACTIVE |
Metro Machine, INC. | Englewood | CO | 20–99 | ● ACTIVE |
Metron Machining LLC | Lakewood | CO | — | ● ACTIVE |
| MTMeyer Tool, INC. | Cincinnati | OH | 500+ | ● ACTIVE |
Mfc Netform LLC | Shelby Township | MI | — | ● ACTIVE |
M & H Machining, INC | Georgetown | TX | — | ● ACTIVE |
Mica-tron Products CORP | Holbrook | MA | — | ● ACTIVE |
| MPMicron Precision Machining INC | Saginaw | MI | — | ● ACTIVE |
Microtech Machine CO INC | Wheeling | IL | — | ● ACTIVE |
Mid-continent Engineering, LLC | Minneapolis | MN | — | ● ACTIVE |
Mid-continent Machining INC | Kansas City | KS | — | ● ACTIVE |
Mid Valley Industries, LLC | Kaukauna | WI | — | ● ACTIVE |
Midway Machine & Instrument Company INC | South Houston | TX | — | ● ACTIVE |
Midwest Metal Fabrication LLC | Manitowoc | WI | — | ● ACTIVE |
Midwest Tool, INC. | Joplin | MO | — | ● ACTIVE |
Mike Gibson Manufacturing INC | Caldwell | ID | — | ● ACTIVE |
| MSMikro Systems, INC | Charlottesville | VA | 100–499 | ● ACTIVE |
Millennium Precision LLC | Manchester | NH | — | ● ACTIVE |
Miller-leaman, INC. | Daytona Beach | FL | — | ● ACTIVE |
Milliflect Company LLC | Newark | CA | — | ● ACTIVE |
Millrite Machine INC. | Westfield | MA | — | ● ACTIVE |
Mill Rose CO | Mentor | OH | — | ● ACTIVE |
Milton, Vermont Sheet Metal, INC | Milton | VT | — | ● ACTIVE |
| MMMinden Machine Shop INC | Minden | NE | 20–99 | ● ACTIVE |
Minerva Welding and Fabricating, INC. | Minerva | OH | — | ● ACTIVE |
Mini-flex Corporation | Ventura | CA | — | ● ACTIVE |
| MFMinitec Framing Systems, LLC | Farmington | NY | 20–99 | ● ACTIVE |
Minnesota Industrial Tooling INC. | Lonsdale | MN | — | ● ACTIVE |
Minter Industries, LLC | Lakewood | WA | — | ● ACTIVE |
Mmlj INC | Houston | TX | — | ● ACTIVE |
Mobile Component, INC | Boise | ID | — | ● ACTIVE |
Modelcraft Company, Incorporated | Plymouth | CT | — | ● ACTIVE |
Modern Advanced Manufacturing LLC | Rockford | IL | 20–99 | ● ACTIVE |
Modern Engineering Solutions LLC | Rockford | MI | 20–99 | ● ACTIVE |
| MFModern Forge Texas, LLC | Hurst | TX | 20–99 | ● ACTIVE |
| MIModern Industries, INC. | Phoenix | AZ | — | ● ACTIVE |
Modular Container Systems, INC. | Lavonia | GA | 20–99 | ● ACTIVE |
| MIMoldpro, Inc. | Swanzey | NH | 20–99 | ● ACTIVE |
Moldtech LLC | Lancaster | NY | — | ● ACTIVE |