Maine Source Machining Co, INC | West Newfield | ME | — | ● ACTIVE |
| MEMaitland Engineering Inc. Bldg#1 | South Bend | IN | 20–99 | ● ACTIVE |
| MTMajestic Tool & Machine, LLC | Solon | OH | — | ● ACTIVE |
Maloney Precision Manufacturing LLC | Lowell | MA | — | ● ACTIVE |
Malux Machine LLC | Stratford | CT | — | ● ACTIVE |
M & a Metals INC | Staten Island | NY | — | ● ACTIVE |
Manderscheid, INC | Plano | TX | — | ● ACTIVE |
Manhattan Beach Labs, INC | El Segundo | CA | — | ● ACTIVE |
Manufacture Design Innovation, INC | Gilberts | IL | — | ● ACTIVE |
Manufacturers Service Company, Incorporated | Woodbridge | CT | — | ● ACTIVE |
Manufacturing Solutions Industries, INC | Beaumont | TX | — | ● ACTIVE |
Manufacturing Standard, LLC | Poway | CA | — | ● ACTIVE |
| MTManufacturing Technology Group, INC | Westfield | MA | — | ● ACTIVE |
Manufacturing Technology LLC | Birmingham | AL | — | ● ACTIVE |
Manutek Mfg LLC | Estacada | OR | — | ● ACTIVE |
Mar Aerospace LLC | Wethersfield | CT | — | ● ACTIVE |
Marcu Manufacturing of Georgia, LLC | Buford | GA | — | ● ACTIVE |
| MIMarian Inc. HQ | Indianapolis | IN | 100–499 | ● ACTIVE |
| MMMarian Monticello | Monticello | IN | 20–99 | ● ACTIVE |
| MIMarina Island Holding LLC | Surfside | FL | — | ● ACTIVE |
Marinette Machine LLC | Marinette | WI | — | ● ACTIVE |
| MMMarin Manufacturing Services LLC | Albuquerque | NM | — | ● ACTIVE |
Marion Tool & Die INC | West Terre Haute | IN | — | ● ACTIVE |
Mark Beesley Manufacturing INC | Blairstown | NJ | — | ● ACTIVE |
Markforged INC | Waltham | MA | 100–499 | ● ACTIVE |
Markins Enterprise, LLC | Tolleson | AZ | — | ● ACTIVE |
Markley Enterprises LLC | Cincinnati | OH | — | ● ACTIVE |
Mark Schwager INC | Imlay City | MI | — | ● ACTIVE |
| MMMarlin Machine Products | Riverside | CA | — | ● ACTIVE |
Maro & Associates INC | Gwinner | ND | — | ● ACTIVE |
Marquee Machining & Engineering LLC | Leesburg | IN | — | ● ACTIVE |
Marsam Metal Finishing CO | New Britain | CT | — | ● ACTIVE |
| MIMarsan INC | Germantown | WI | — | ● ACTIVE |
Marshall Metal Products INC | Marshall | MI | — | ● ACTIVE |
| MPMarshall Precision Manufacturing, INC. | Guntersville | AL | — | ● ACTIVE |
Marsol Technologies, INC. | Houston | TX | — | ● ACTIVE |
Mars Technologies INC | Sarver | PA | — | ● ACTIVE |
Martin Mechanical Design LLC | Pittsburgh | PA | — | ● ACTIVE |
Marvel Manufacturing LLC | Lewiston | ID | — | ● ACTIVE |
Marzilli Machine CO | Seekonk | MA | — | ● ACTIVE |
Mascon, INC. | Woburn | MA | — | ● ACTIVE |
Masha Manufacturing, INC | Albuquerque | NM | — | ● ACTIVE |
Massivit 3d INC | Alpharetta | GA | — | ● ACTIVE |
Master Fog LLC | West Chicago | IL | — | ● ACTIVE |
Master Lock Company LLC | Deerfield | IL | — | ● ACTIVE |
Master Machine INC | Ham Lake | MN | — | ● ACTIVE |
Master Machine & Tool CO INC | Newport News | VA | — | ● ACTIVE |
Master Sheetmetal Works INC | Hanahan | SC | — | ● ACTIVE |
Master Tool & Machine, LLC | Morrison | TN | — | ● ACTIVE |
| MAMatdan Aerospace Corporation | Blue Ash | OH | — | ● ACTIVE |
Materials Fabrication and Testing Services, INC. | Oak Ridge | TN | — | ● ACTIVE |
Materials Science International INC | Columbus | OH | — | ● ACTIVE |
Material System INC | Childersburg | AL | — | ● ACTIVE |
Matern Metal Works, INC | Mansfield | OH | — | ● ACTIVE |
Mathew Wallace | Grimes | CA | — | ● ACTIVE |
Mathtopian Preparation, INC. | Los Angeles | CA | — | ● ACTIVE |
Matrix Machine INC | Tempe | AZ | — | ● ACTIVE |
Mat-tech LLC | Sayville | NY | — | ● ACTIVE |
Matterhackers, INC. | Lake Forest | CA | — | ● ACTIVE |
Matthew Warren, INC | Fenton | MO | — | ● ACTIVE |
Matthew Warren, INC | Santa Maria | CA | — | ● ACTIVE |
Mattis Aerospace INC | Indian Land | SC | — | ● ACTIVE |
Maumee Pattern CO | Toledo | OH | — | ● ACTIVE |
Maverick Fasteners LLC | Frisco | TX | — | ● ACTIVE |
Maverick Machine Co., LLC | Tamaqua | PA | — | ● ACTIVE |
Maverick Manufacturing LLC | Spartanburg | SC | — | ● ACTIVE |
| MLMax3, LLC | Benton Harbor | MI | — | ● ACTIVE |
Maxcam CORP | Saint Paul | MN | — | ● ACTIVE |
Max Machine, LLC | Elizabethtown | PA | — | ● ACTIVE |
Max Machining LLC | Telford | PA | — | ● ACTIVE |
Maxx/american Industrial, INC. | Santa Rosa | CA | — | ● ACTIVE |
Mayville Engineering Company, INC. | Milwaukee | WI | — | ● ACTIVE |
| MAMb Aerospace East Granby, Limited Partnership | East Granby | CT | 100–499 | ● ACTIVE |
| MAM&b Assembly CORP | Gardena | CA | — | ● ACTIVE |
Mb Machine, LLC | Sanford | ME | — | ● ACTIVE |
Mbs Manufacturing INC. | Franklin Park | IL | — | ● ACTIVE |
Mbt Product Design & Manufacturing INC | Waynesboro | PA | — | ● ACTIVE |
| MTMcallister Tool & Machine INC | Huntsville | AL | — | ● ACTIVE |
Mccormick Industries INC | Appleton | WI | — | ● ACTIVE |
Mc Engineering, INC | Mesa | AZ | — | ● ACTIVE |
Mcflusion INC | Twinsburg | OH | — | ● ACTIVE |
| MLMcgard, LLC | Orchard Park | NY | 100–499 | ● ACTIVE |
Mcgraw Manufacturing, INC. | Gainesville | GA | — | ● ACTIVE |
| MMMcgregor Metal Holdings LLC | Springfield | OH | — | ● ACTIVE |
Mckiney Manufacturing and Sales, LLC | Mitchell | NE | — | ● ACTIVE |
Mcmillan Design, INC. | Gig Harbor | WA | — | ● ACTIVE |
Mcquillen Manufacturing LLC. | Honeoye Falls | NY | — | ● ACTIVE |
Mdf Enterprises LLC | Dayton | OH | — | ● ACTIVE |
Meadville Tool Grinding, INC | Conneaut Lake | PA | — | ● ACTIVE |
Measured Fabrication, LLC | Memphis | TN | — | ● ACTIVE |
Mecha, INC. | Raleigh | NC | — | ● ACTIVE |
Mechanical Industries Wi LLC | Milwaukee | WI | — | ● ACTIVE |
Mechanical Manufacturing CORP | Sunrise | FL | — | ● ACTIVE |
Medaxis LLC | Plano | TX | — | ● ACTIVE |
Meld Printworks Corporation | Christiansburg | VA | — | ● ACTIVE |
Memac Industries INC. | Lancaster | OH | — | ● ACTIVE |
Menco LLC | Wallace | MI | — | ● ACTIVE |
Menke Industries, LLC | Wayland | MI | — | ● ACTIVE |
Mennie's Machine CO | Mark | IL | — | ● ACTIVE |
Mercer Machine Company, INC | Camby | IN | — | ● ACTIVE |