| KMKilleen Machine and Tool Company, Inc. | Auburn, MA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| KAKitchen Associates INC | Sterling, MA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| LELaconia Earth Anchors INC. | South Grafton, MA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| LLaird-drico | Worcester, MA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| LPLavigne Press | Worcester, MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| LPLights Planner Action LLC | Worcester, MA | Paper Manufacturing322299 | — | ◇ UNVERIFIED |
| LSL&m Stress Relieving | Fitchburg, MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| LLLohxa, LLC | North Oxford, MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| LFLoyal Foe Brewing Company LLC | Harvard, MA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
 L & R Manufacturing Co., INC. | Worcester, MA | Fabricated Metal Product Manufacturing332996 | — | ◇ UNVERIFIED |
| LCLuxtec CORP | West Boylston, MA | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| MPMace Polymers and Coating CO | Dudley, MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
 Machining Technologies LLC | Webster, MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MEMagnetika East | Marlborough, MA | Computer and Electronic Product Manufacturing334416 | — | ◇ UNVERIFIED |
| MLManafort-precision, LLC | Worcester, MA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| MLManafort-precision, LLC | Worcester, MA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| MCMar-lee Companies, INC. | Fitchburg, MA | Plastics and Rubber Products Manufacturing326160 | — | ◇ UNVERIFIED |
| MWMary Wells Junior High School | Southbridge, MA | Fabricated Metal Product Manufacturing332410 | — | ◇ UNVERIFIED |
| MBMassachusetts Broken Stone Company | Holden, MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MBMass Brewing LLC | Clinton, MA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| MCMD Chemicals LLC | Mendon, MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MMMetalcraft Machining | Southbridge, MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MIMetalogic Industries LLC | Dudley, MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MWMetamagnetics Westborough | Westborough, MA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| MHMg Harry J Malony Usarc | Devens, MA | Electrical Equipment, Appliance & Component Manufacturing335911 | — | ◇ UNVERIFIED |
| MAMichael a Allen | Fitchburg, MA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| MAMicro Arc Welding INC | Worcester, MA | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
| MWMilford Woodworking Company, INC. | Milford, MA | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| MSMinuteman Spring LLC | Millbury, MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MPM&M Printing | Douglas, MA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| MMMonalex Manufacturing, INC. | Douglas, MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MSMotor Service INC | Auburn, MA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| MBMustang Bio INC | Worcester, MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| MSMVP Sign, Inc. | Northborough, MA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| MEMyriad Engineering Co Inc. | North Oxford, MA | — | — | ◇ UNVERIFIED |
| NCNanmac Corporation | Milford, MA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| NNensco | Millbury, MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NNeotech | Westborough, MA | Computer and Electronic Product Manufacturing334111 | — | ◇ UNVERIFIED |
| NTNeo Technology Solutions | Westborough, MA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| NPNewcorr Packaging | Westborough, MA | Paper Manufacturing322130 | — | ◇ UNVERIFIED |
| NENew England Tele | Worcester, MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NENew England Wirecloth Company, INC. | Fitchburg, MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NGNew Garden Park INC | Worcester, MA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| NPNine Points Woodworking | Worcester, MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| NMNorthbridge Mills LLC | Northbridge, MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman | Devens, MA | Computer and Electronic Product Manufacturing334610 | — | ◇ UNVERIFIED |
| OSOld Sterling Candle CO | Clinton, MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| OSOmni Stone Works, INC. | Westborough, MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| OEO'Tech East, LLC | Auburn, MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| PMParker Metals | Worcester, MA | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
