| MMMackay Manufacturing INC | Spokane | WA | 100–499 | ● ACTIVE |
Mackenzie Machine & Design INC | Pembroke | MA | — | ● ACTIVE |
Mac Products, INC | Kearny | NJ | — | ● ACTIVE |
Mactech Incorporated | Red Wing | MN | — | ● ACTIVE |
Madison Defense Research LLC | Waunakee | WI | — | ● ACTIVE |
| MIMagline INC | Standish | MI | 100–499 | ● ACTIVE |
| MCMagna-matic CORP | Waldo | WI | — | ● 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 |
Manasota Optics, INC. | Sarasota | FL | — | ● ACTIVE |
Maney Aircraft, INC. | Ontario | CA | — | ● ACTIVE |
| MTManitowoc Tool & Machining LLC | Manitowoc | WI | 100–499 | ● ACTIVE |
Mantec Services INC | Saint Charles | IL | — | ● 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 |
Manufacturing Solutions, INC | Morrisville | VT | 100–499 | ● 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 |
Martin-ray Laundry Systems, INC | Denver | CO | 1–19 | ● 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 |
| MPMaterion Precision Optics and Thin Film Coatings INC | Westford | MA | — | ● ACTIVE |
Mauell CORP | Dillsburg | PA | 20–99 | ● ACTIVE |
Maynard INC | Fayetteville | AR | — | ● ACTIVE |
May Tool and Mold Co., INC. | Kansas City | MO | — | ● ACTIVE |
Maztech Industries LLC | Irvine | CA | — | ● 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 |
| MEMechanical Equipment Company, INC. | Mandeville | LA | 100–499 | ● ACTIVE |
Mega Precision LLC | Newington | CT | — | ● ACTIVE |
Megatech Manufacturing LLC | Westminster | CA | — | ● ACTIVE |
Melton Machine & Control CO | Washington | MO | 100–499 | ● ACTIVE |
Memcor INC | Huntington | IN | — | ● ACTIVE |
Menze Precision Machining, LLC | Winter Haven | FL | — | ● ACTIVE |
Mercer International, INC. | Albany | NY | — | ● 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 |
Metalcraft, INC | Baltimore | MD | 20–99 | ● 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 |
Metal Improvement Company, LLC | Addison | 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 |
| MRMeyercord Revenue INC | Carol Stream | IL | 20–99 | ● 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 |
| MQMicro Q, INC | San Diego | CA | — | ● ACTIVE |
Microtech Machine CO INC | Wheeling | IL | — | ● ACTIVE |
Mid-america Taping & Reeling INC | Glendale Heights | IL | — | ● ACTIVE |
Mid-continent Engineering, LLC | Minneapolis | MN | — | ● ACTIVE |
Mid-continent Machining INC | Kansas City | KS | — | ● ACTIVE |
| MTMid-state Tank CO INC | Sullivan | IL | — | ● 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 |
Millennium Precision LLC | Manchester | NH | — | ● ACTIVE |
Miller-leaman, INC. | Daytona Beach | FL | — | ● ACTIVE |
Milliflect Company LLC | Newark | CA | — | ● ACTIVE |