Bristol Precision, INC. | Marlborough | — | ● ACTIVE |
Bulldog Fire Apparatus, INC. | Hopkinton | — | ● ACTIVE |
Continental Metal Products Co, INC. | Woburn | — | ● ACTIVE |
| DSDoughty & Sons, INC. | Woburn | — | ● ACTIVE |
East Coast Perfection Coatings INC | Holliston | — | ● ACTIVE |
Eckel Industries, INC. | Ayer | — | ● ACTIVE |
Fastenerz.com, INC | Marlborough | — | ● ACTIVE |
Fixyte Systems INC | Billerica | — | ● ACTIVE |
| FEForgione Engineering, INC | Lowell | — | ● ACTIVE |
Foundation Alloy Technology Explorations, INC | Woburn | — | ● ACTIVE |
Lavelle Medical LLC | Westford | — | ● ACTIVE |
Maloney Precision Manufacturing LLC | Lowell | — | ● ACTIVE |
| MCMiddlesex Commercial Sales, INC. | Tyngsboro | — | ● ACTIVE |
Naushon Engineering LLC | Winchester | — | ● ACTIVE |
Ramsay Welding & Fabrication, INC. | Woburn | — | ● ACTIVE |
Spring Manufacturing CORP | Tewksbury | — | ● ACTIVE |
Standex International Corporation | Wakefield | — | ● ACTIVE |
Suburban Machine, INC. | Westford | — | ● ACTIVE |
Tantalum Bolt & Fastener, LLC | Waltham | — | ● ACTIVE |
Trilap Precision Finishing, LLC | Lowell | — | ● ACTIVE |
Triumph Modular Incorporated | Westford | — | ● ACTIVE |
Vantage Defense LLC | Woburn | — | ● ACTIVE |
| OSOlympic Systems CORP | Winchester | 20–99 | ◐ LIKELY ACTIVE |
| AMActon Metal Processing Corporation | Waltham | — | ◐ LIKELY ACTIVE |
Alexander Machine & Tool Company, LLC. | Woburn | — | ◐ LIKELY ACTIVE |
| HLHudson Lock | Hudson | 20–99 | ◐ LIKELY ACTIVE |
| IPInteger Precision Technologies LLC | Hudson | 100–499 | ◐ LIKELY ACTIVE |
| RMRuland Manufacturing CO. INC | Marlborough | 20–99 | ◐ LIKELY ACTIVE |
Textron Systems Corporation | Wilmington | 100–499 | ▲ REPORTED CLOSED |
| AIAstron, INC | Pepperell | — | ◇ UNVERIFIED |
| DGDuncan Group the | Everett | — | ◇ UNVERIFIED |
| FCFm Callahan & Son | Malden | — | ◇ UNVERIFIED |
| LILytron INC | Woburn | — | ◇ UNVERIFIED |
| PPParadigm Precision | Malden | — | ◇ UNVERIFIED |
| HTHigh Tech Machinists, INC. | Chelmsford | — | ◐ LIKELY ACTIVE |
| MIMetal Improvement Company, LLC | Wilmington | — | ◐ LIKELY ACTIVE |
| AFAnjen Finishing INC | Marlborough | — | ◇ UNVERIFIED |
| GIGeartronics Industries | Billerica | — | ◇ UNVERIFIED |
| NINovotech INC | Acton | — | ◇ UNVERIFIED |
| WCWakefield Corporation the | Wakefield | — | ◇ UNVERIFIED |
| CCChurchill CORP | Melrose | 20–99 | ◐ LIKELY ACTIVE |
| CWCurtiss Wright Surface Technologies | Wilmington | — | ◐ LIKELY ACTIVE |
| DGDuncan Galvanizing Corp | Everett | 20–99 | ◐ LIKELY ACTIVE |
| HPHewlett Packard | Waltham | — | ◐ LIKELY ACTIVE |
| HAHutchinson Aerospace & Industry, INC. | Hopkinton | — | ◐ LIKELY ACTIVE |
| KMK & M Engineering, INC | Marlborough | — | ◐ LIKELY ACTIVE |
| KIKtron Incorporated | Marlborough | — | ◐ LIKELY ACTIVE |
| LILista International INC | Holliston | — | ◐ LIKELY ACTIVE |
| LILkm Industries, INC | Woburn | — | ◐ LIKELY ACTIVE |
| PCPatriot Coating, INC | Hudson | — | ◐ LIKELY ACTIVE |