Lockheed Martin Corporation | Chelmsford | MA | Computer and Electronic Product Manufacturing334511 | — | ● ACTIVE |
| LHLord Hobo Brewing Company LLC | Woburn | MA | Beverage and Tobacco Product Manufacturing312120 | 20-99 | ● ACTIVE |
Louis C Morin CO INC | North Billerica | MA | Fabricated Metal Product Manufacturing332710 | — | ● ACTIVE |
Lumafield, INC. | Cambridge | MA | Computer and Electronic Product Manufacturing334513 | 100-499 | ● ACTIVE |
Mach Machine INC | Hudson | MA | Fabricated Metal Product Manufacturing332721 | — | ● ACTIVE |
Mackenzie Machine & Design INC | Pembroke | MA | Fabricated Metal Product Manufacturing332710 | — | ● ACTIVE |
Mack Technologies, INC. | Westford | MA | Computer and Electronic Product Manufacturing334111 | — | ● ACTIVE |
Magellan Aerospace, Haverhill, INC | Haverhill | MA | Transportation Equipment Manufacturing336412 | 100-499 | ● ACTIVE |
Magellan Diagnostics, INC | North Billerica | MA | Chemical Manufacturing325413 | — | ● ACTIVE |
Malvern Panalytical INC | Westborough | MA | Computer and Electronic Product Manufacturing334516 | — | ● ACTIVE |
| MBMass. Bay Brewing Company, Inc. | Boston | MA | Beverage and Tobacco Product Manufacturing312120 | 100-499 | ● ACTIVE |
| MCMass Cabinets INC | Methuen | MA | Furniture and Related Product Manufacturing337110 | — | ● ACTIVE |
| MCMass Crane & Hoist Services, INC | Tyngsboro | MA | Machinery Manufacturing333923 | — | ● ACTIVE |
Matec Instrument Companies, INC. | Northborough | MA | Computer and Electronic Product Manufacturing334519 | — | ● ACTIVE |
| MNMaterion Newton INC | Newton | MA | Primary Metal Manufacturing331410 | 100-499 | ● ACTIVE |
| MPMaterion Precision Optics and Thin Film Coatings INC | Westford | MA | Machinery Manufacturing333310 | — | ● ACTIVE |
Mcgill Hose & Coupling, INC. | East Longmeadow | MA | Fabricated Metal Product Manufacturing332912 | — | ● ACTIVE |
Mercury Systems INC | Andover | MA | Computer and Electronic Product Manufacturing334111 | — | ● ACTIVE |
| MMMerrow Manufacturing LLC | Fall River | MA | Apparel Manufacturing315210 | 20-99 | ● ACTIVE |
Metalcrafters, INC. | Methuen | MA | Fabricated Metal Product Manufacturing332322 | 20-99 | ● ACTIVE |
Metalor Technologies USA Corporation | North Attleboro | MA | Chemical Manufacturing325180 | — | ● ACTIVE |
Metal Processing Co., INC. | Tyngsboro | MA | Computer and Electronic Product Manufacturing334419 | — | ● ACTIVE |
Metamagnetics INC | Marlborough | MA | Computer and Electronic Product Manufacturing334419 | 20-99 | ● ACTIVE |
Mica-tron Products CORP | Holbrook | MA | Fabricated Metal Product Manufacturing332710 | — | ● ACTIVE |
| MPMicron Products INC | Fitchburg | MA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ● ACTIVE |
| MLMicrosense, LLC | Lowell | MA | Computer and Electronic Product Manufacturing334413 | — | ● ACTIVE |
Microwave Components & Systems, INC. | Westborough | MA | Computer and Electronic Product Manufacturing334220 | — | ● ACTIVE |
Millrite Machine INC. | Westfield | MA | Fabricated Metal Product Manufacturing332710 | — | ● ACTIVE |
Mini-systems INC | Attleboro | MA | Computer and Electronic Product Manufacturing334415 | — | ● ACTIVE |
Modern Mold and Tool, INC. | Pittsfield | MA | Chemical Manufacturing325211 | — | ● ACTIVE |
| MBMorrison Berkshire INC | North Adams | MA | Fabricated Metal Product Manufacturing332312 | — | ● ACTIVE |
My Cousins Wine LLC | Harwich | MA | Beverage and Tobacco Product Manufacturing312130 | — | ● ACTIVE |
Mycronic INC | Tewksbury | MA | Machinery Manufacturing333242 | 100-499 | ● ACTIVE |
Myomo INC | Burlington | MA | Miscellaneous Manufacturing339112 | — | ● ACTIVE |
Myriad Fiber Imaging Technologies, INC | Dudley | MA | Electrical Equipment, Appliance & Component Manufacturing335921 | — | ● ACTIVE |
Nanoramic, INC. | Woburn | MA | Electrical Equipment, Appliance & Component Manufacturing335910 | 20-99 | ● ACTIVE |
Nashoba Valley Spirits, LTD. | Bolton | MA | Beverage and Tobacco Product Manufacturing312130 | — | ● ACTIVE |
| NCNational Coating | Rockland | MA | Textile Mills313320 | 20-99 | ● ACTIVE |
National Van Builders INC | Attleboro | MA | Transportation Equipment Manufacturing336211 | — | ● ACTIVE |
| NBNew Balance Athletic Shoe | Lawrence | MA | Leather and Allied Product Manufacturing316210 | — | ● ACTIVE |
New England Custom Coaters, INC. | Agawam | MA | Fabricated Metal Product Manufacturing332812 | — | ● ACTIVE |
| NENew England Etching Co, INC. | Holyoke | MA | Fabricated Metal Product Manufacturing332812 | — | ● ACTIVE |
New Objective INC | Littleton | MA | Computer and Electronic Product Manufacturing334516 | — | ● ACTIVE |
| NPNext Phase Medical Devices | Mansfield | MA | Computer and Electronic Product Manufacturing334510 | — | ● ACTIVE |
Nona Technologies, INC | Somerville | MA | Miscellaneous Manufacturing339950 | — | ● ACTIVE |
Norfolk Corporation | Marshfield | MA | Chemical Manufacturing325510 | — | ● ACTIVE |
Norpin Manufacturing CO INC | Wilbraham | MA | Fabricated Metal Product Manufacturing332431 | — | ● ACTIVE |
Nortek, INC. | West Springfield | MA | Fabricated Metal Product Manufacturing332721 | — | ● ACTIVE |
| NMNortheast Manufacturing Co., INC. | Stoneham | MA | Fabricated Metal Product Manufacturing332710 | — | ● ACTIVE |
North Easton Machine Company, INC. | North Easton | MA | Fabricated Metal Product Manufacturing332721 | 20-99 | ● ACTIVE |