| AIAggregate Industries Asphalt Plant | Watertown | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries Concrete | Boston | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries Concrete | Grafton | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries Ne Region INC | Holliston | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries Northeas | Taunton | MA | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| AIAggregate Industries Northeas | Barnstable | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries Northeast Region | Burlington | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| AIAggregate Industries Northeast Region | Raynham | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries Northeast Region | Carver | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries Northeast Region | Plainville | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ARAh Rice | Pittsfield | MA | Textile Mills313110 | — | ◇ UNVERIFIED |
| ACAinslie Corporation | Braintree | MA | Food Manufacturing311111 | — | ◇ UNVERIFIED |
| ACAir Compressor Engineering CO | Westfield | MA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| AMAlbany Molecular Research, Inch | Burlington | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AFAlcoa Fastening Systems | Stoughton | MA | Fabricated Metal Product Manufacturing332420 | — | ◇ UNVERIFIED |
| ADAlden Div of Mrc | West Springfield | MA | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| ARAlexandria Real Estate | Woburn | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ACAlger Corporation the | Abington | MA | Leather and Allied Product Manufacturing316990 | — | ◇ UNVERIFIED |
| AHAllegiance Healthcare Corporation | Bedford | MA | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| AMAllegro Microsystems INC | Worcester | MA | Computer and Electronic Product Manufacturing334113 | — | ◇ UNVERIFIED |
| ALAlliance Leather | Peabody | MA | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
| APAlnylam Pharmaceutals | Cambridge | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| ACAlviti Creations | Attleboro | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| AAmaray | Pittsfield | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AAmaray | Pittsfield | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ACAmazon Com Services LLC Dko1 | Littleton | MA | Computer and Electronic Product Manufacturing334111 | — | ◇ UNVERIFIED |
| AEAmerican Engineered Components INC | Cambridge | MA | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| ALAmerican Light Fixture | Taunton | MA | Electrical Equipment, Appliance & Component Manufacturing335121 | — | ◇ UNVERIFIED |
| ALAmerican London Building | Norwood | MA | Textile Mills313320 | — | ◇ UNVERIFIED |
| AMAmerican Manufacturing | Avon | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| AOAmerican Optical | Southbridge | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
 American Polymers | Oxford | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| APAmerican Pride Seafood | New Bedford | MA | Food Manufacturing311710 | — | ◇ UNVERIFIED |
| ARAmerican Reclamation | Charlton | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ASAmerican Superconductor | Ayer | MA | Fabricated Metal Product Manufacturing332112 | — | ◇ UNVERIFIED |
| ACAmericraft Carton INC | Lowell | MA | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| AGAmesbury Group Foam-tite Products | Amesbury | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AFAmor Flexibles Healthcare | Ashland | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ACAmpad CORP | Holyoke | MA | Paper Manufacturing322230 | — | ◇ UNVERIFIED |
| ACAmpad Corporation | Holyoke | MA | Paper Manufacturing322230 | — | ◇ UNVERIFIED |
| ANAmrize Northeast INC | Hyannis | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ADAnalog Devices | Cambridge | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ADAnalog Devices INC | Wilmington | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| AWAnderson Woodturning | Gardner | MA | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| AWAndreu World America, LLC | Gardner | MA | Machinery Manufacturing333132 | — | ◇ UNVERIFIED |
| ATAnika Therapeutics | Woburn | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| ARAnimal Rescue League Fall River | Fall River | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ARApex Resources Technologies | Pittsfield | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
 Arc Technologies INC | Amesbury | MA | Plastics and Rubber Products Manufacturing326220 | — | ◇ UNVERIFIED |
| ALArk Les Corporation | Stoughton | MA | Computer and Electronic Product Manufacturing334417 | — | ◇ UNVERIFIED |
