| MTModerna Therapeutics INC. | Norwood | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| MDModern Dispersion | Leominster | MA | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| MTMold Tech Northeast | Chicopee | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MCMonson Chemical Distribution | Leominster | MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MCMontrose Cdt | Auburn | MA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| MWMoore Wallace We Andrews CO | Bedford | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| MCMorgan Construction (siemens) | Worcester | MA | Fabricated Metal Product Manufacturing332991 | — | ◇ UNVERIFIED |
| MSMorse Sand & Gravel | Attleboro | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| MIMorton International | Woburn | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MCMotorola Codex | Mansfield | MA | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| MTMount Tom Box CO LLC | West Springfield | MA | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| MLMra Laboratories INC | North Adams | MA | Computer and Electronic Product Manufacturing334414 | — | ◇ UNVERIFIED |
| MLMra Laboratories INC | Adams | MA | Computer and Electronic Product Manufacturing334414 | — | ◇ UNVERIFIED |
| MIMsm Industries Incorporated | North Reading | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MCMultilayer Coating Technologies | New Bedford | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| MPMunskjo Paper Decor | Fitchburg | MA | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| MLMurray Lane Trust | Athol | MA | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| MFMwra Fore River Staging Area | Quincy | MA | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| MIMylec INC | Winchendon | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| MPMystic Plating CORP | Medford | MA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| NCNai Cranes LLC | Woburn | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NINanostone INC. | Waltham | MA | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
| NINantero INC | Woburn | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| NVNashoba Valley Structural | Lunenburg | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NPNatick Paperboard | Natick | MA | Paper Manufacturing322130 | — | ◇ UNVERIFIED |
| NFNational Felt CO INC | Easthampton | MA | Textile Mills313210 | — | ◇ UNVERIFIED |
| NPNatural Pharmaceuticals | Fall River | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| NPNeenah Paper Fr LLC | Great Barrington | MA | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| NTNeenah Technical Materials INC | Pittsfield | MA | Textile Mills313230 | — | ◇ UNVERIFIED |
| NENensco (new England Newspaper Supply) | Millbury | MA | Paper Manufacturing322222 | — | ◇ UNVERIFIED |
| NDNetwork Drive Owner LLC | Burlington | MA | Computer and Electronic Product Manufacturing334111 | — | ◇ UNVERIFIED |
| NBNew Balance Athletic Shoe INC | Boston | MA | Leather and Allied Product Manufacturing316210 | — | ◇ UNVERIFIED |
| NCNew Com Metal Products CORP | Randolph | MA | Fabricated Metal Product Manufacturing332999 | 20-99 | ◇ UNVERIFIED |
| NCNew Corr Packaging | Northborough | MA | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| NENew England Art Publishers | Abington | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| NENew England Casket Company | Boston | MA | Miscellaneous Manufacturing339995 | — | ◇ UNVERIFIED |
| NENew England Compressor Exchan | Woburn | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| NENew England Confectionery Company Plant | Revere | MA | Food Manufacturing311330 | — | ◇ UNVERIFIED |
| NENew England Emulsions CORP | Holliston | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| NENew England Ice Cream CORP | Attleboro | MA | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| NENew England Plastic | Norton | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NENew England Ropes | Fall River | MA | Textile Product Mills314991 | — | ◇ UNVERIFIED |
| NENew England Sheets LLC | Devens | MA | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| NENew England Smelting Works INC | West Springfield | MA | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| NENew England Tele | Lawrence | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NENew England Treatment Access | Franklin | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| NWNewly Weds Foods | Watertown | MA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| NMNew Model Cleaners INC. | Boston | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NSNichols & Stone CO | Gardner | MA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| NONip Owner LLC | Tewksbury | MA | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
