| MMMair-mac Machine Company, INC. | Brockton | — | ● ACTIVE |
Maloney Precision Manufacturing LLC | Lowell | — | ● ACTIVE |
Manning Way Capital Partners LLC | Bellingham | — | ● ACTIVE |
| MTManufacturing Technology Group, INC | Westfield | — | ● ACTIVE |
Marzilli Machine CO | Seekonk | — | ● ACTIVE |
Metalogic Industries LLC | Southbridge | — | ● ACTIVE |
| MHM & H Engineering Co., INC. | Danvers | 20–99 | ● ACTIVE |
M. H. Sanborn, INC. | Andover | — | ● ACTIVE |
Micro Machine & Electronics, INC. | Leominster | — | ● ACTIVE |
| MCMicrowave Components Specialists, INC. | Orleans | — | ● ACTIVE |
| MCMiddlesex Commercial Sales, INC. | Tyngsboro | — | ● ACTIVE |
Mills Machine Works, INC. | Lawrence | — | ● ACTIVE |
Mk Services CORP. | Middleton | — | ● ACTIVE |
Naushon Engineering LLC | Winchester | — | ● ACTIVE |
| NFNortheast Fabricators & Mechanical Services, LLC | Dalton | — | ● ACTIVE |
Nucor Rebar Fabrication South LLC | Milford | — | ● ACTIVE |
| OEOlympic Engineering Services, INC | Bradford | — | ● ACTIVE |
O. W. Landergren, INC | Pittsfield | — | ● ACTIVE |
| PMPearson Machine Company LLC | Stoughton | — | ● ACTIVE |
Penguin Air | Fitchburg | — | ● ACTIVE |
Pics Screw Machine, INC. | Salem | — | ● ACTIVE |
Piping Specialties, INC. | Danvers | — | ● ACTIVE |
Plastic Distributors & Fabricators, LLC | Haverhill | — | ● ACTIVE |
| PMPrecision Manufacturing Ind., LLC | Westfield | — | ● ACTIVE |
Prematech, LLC | Worcester | — | ● ACTIVE |
Proto Xyz, INC. | New Bedford | — | ● ACTIVE |
Quantum Edge Precision LLC | Fitchburg | — | ● ACTIVE |
Quick Manufacturing CO. | Danvers | — | ● ACTIVE |
Ramsay Welding & Fabrication, INC. | Woburn | — | ● ACTIVE |
| RMRevolutionary Manufacturing Solutions, LLC | East Boston | — | ● ACTIVE |
Richards Design, INC. | East Falmouth | — | ● ACTIVE |
Rock Valley Tool, LLC | Easthampton | — | ● ACTIVE |
| RIRussard, INC. | Rockland | — | ● ACTIVE |
Sabr Enterprises LLC | North Andover | — | ● ACTIVE |
Savage Range Systems, INC. | Westfield | — | ● ACTIVE |
Semco Machine Corporation | Plainville | — | ● ACTIVE |
Semiconductor Engineering Products LLC | Wrentham | — | ● ACTIVE |
Special Tactical Services LLC | Dalton | — | ● ACTIVE |
Spring Manufacturing CORP | Tewksbury | — | ● ACTIVE |
| SSS & S Machine Company, INC. | Marshfield | — | ● ACTIVE |
Standex International Corporation | Wakefield | — | ● ACTIVE |
St Pierre Manufacturing CORP | Worcester | — | ● ACTIVE |
Suburban Machine, INC. | Westford | — | ● ACTIVE |
Sx Industries, INC | Stoughton | — | ● ACTIVE |
Tantalum Bolt & Fastener, LLC | Waltham | — | ● ACTIVE |
T & D Specialties, INC. | Oxford | — | ● ACTIVE |
Teltron Engineering, INC. | Taunton | — | ● ACTIVE |
Thermo Craft Engineering CORP. | Lynn | — | ● ACTIVE |
Tim's Fabricators, INC | Fitchburg | — | ● ACTIVE |
| TMTog Manufacturing Company, INC. | North Adams | — | ● ACTIVE |