| AMAdvance Mfg CO INC | Westfield, City of | MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| ADAel Distilleries INC. | Agawam | MA | Beverage and Tobacco Product Manufacturing312140 | 1-19 | ◐ LIKELY ACTIVE |
| ATAerogel Technologies | Hyde Park | MA | Nonmetallic Mineral Product Manufacturing327212 | — | ◐ LIKELY ACTIVE |
| AIAggregate Industries Asphalt | Shrewsbury | MA | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| ACAjinimoto Cambrooke | Ayer | MA | Food Manufacturing311514 | 100-499 | ◐ LIKELY ACTIVE |
| ADAlberox Div of Morgan Advanced Ceramics | New Bedford | MA | Nonmetallic Mineral Product Manufacturing327110 | — | ◐ LIKELY ACTIVE |
| ASAlden Shoe Co. | Middleboro | MA | Leather and Allied Product Manufacturing316210 | 20-99 | ◐ LIKELY ACTIVE |
| AAAlfredo Aiello Italian Foods, INC. | Quincy | MA | Food Manufacturing311612 | 20-99 | ◐ LIKELY ACTIVE |
| AIAlkermes, INC. | Waltham | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| AMAllegro MicroSystems (Marlborough) | Marlborough | MA | Computer and Electronic Product Manufacturing334413 | 100-499 | ◐ LIKELY ACTIVE |
| ACAlpha Chemical Services, INC. | Stoughton | MA | Chemical Manufacturing325611 | 20-99 | ◐ LIKELY ACTIVE |
| ATAlpha Tau Medical INC | Lawrence | MA | Computer and Electronic Product Manufacturing334517 | 1-19 | ◐ LIKELY ACTIVE |
Altium Packaging - Franklin | Franklin | MA | Plastics and Rubber Products Manufacturing326112 | 20-99 | ◐ LIKELY ACTIVE |
| AIAmcor INC | Sterling | MA | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| APAmerican Power Source, INC. | Fall River | MA | Apparel Manufacturing315210 | 100-499 | ◐ LIKELY ACTIVE |
| ADAnalog Devices Federal LLC | Chelmsford | MA | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| APAndritz Paperchine | Springfield | MA | Machinery Manufacturing333243 | 20-99 | ◐ LIKELY ACTIVE |
| AIAnduril Industries Quincy | Quincy | MA | Computer and Electronic Product Manufacturing334511 | 100-499 | ◐ LIKELY ACTIVE |
| AAAngstrom Advanced INC. | Stoughton | MA | Machinery Manufacturing333132 | 1-19 | ◐ LIKELY ACTIVE |
| AMArmstrong Machining, LLC | Beverly | MA | Miscellaneous Manufacturing339999 | 1-19 | ◐ LIKELY ACTIVE |
| APArmstrong Pharmaceuticals INC | Canton | MA | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| ABArranta Bio Ma LLC | Watertown | MA | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| ACArtifact Cider Project | Florence | MA | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| AAAsahi America INC | Lawrence | MA | Plastics and Rubber Products Manufacturing326122 | 100-499 | ◐ LIKELY ACTIVE |
| AEAscend Elements, INC. | Westborough | MA | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| APAst Products, INC | Billerica | MA | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| ALAstraluna, LLC | Medfield | MA | Beverage and Tobacco Product Manufacturing312140 | 1-19 | ◐ LIKELY ACTIVE |
| AFAuburn Filtersense LLC | Beverly | MA | Computer and Electronic Product Manufacturing334513 | 20-99 | ◐ LIKELY ACTIVE |
| ALAutonodyne LLC | Boston | MA | Computer and Electronic Product Manufacturing334511 | 100-499 | ◐ LIKELY ACTIVE |
| BMBad Martha Brewing; Bad Martha | Edgartown | MA | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| BMBanner Mold and Die CO INC | Leominster | MA | Machinery Manufacturing333511 | 20-99 | ◐ LIKELY ACTIVE |
| BBBarewolf Brewing, LLC | Amesbury | MA | Beverage and Tobacco Product Manufacturing312120 | — | ◐ LIKELY ACTIVE |
| BIBaril, Inc. | Haverhill | MA | Miscellaneous Manufacturing339113 | 20-99 | ◐ LIKELY ACTIVE |
| BMBarnhardt Manufacturing Company Griswoldville Plant | Colrain | MA | Textile Mills313230 | 1-19 | ◐ LIKELY ACTIVE |
| BSBay State Brewery & Tap Room | Worcester | MA | Beverage and Tobacco Product Manufacturing312130 | 20-99 | ◐ LIKELY ACTIVE |
| BMBeacon Medtech Solutions Jytek | Leominster | MA | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| BMBeacon Medtech Solutions Ma LLC | Leominster | MA | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| BMBerkshire Mountain Distillers | Sheffield | MA | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| BWBerkshire Winery LLC | Richmond | MA | Beverage and Tobacco Product Manufacturing312140 | 1-19 | ◐ LIKELY ACTIVE |
| BBostomatic | Milford | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BBoston | Marlborough | MA | Computer and Electronic Product Manufacturing334413 | 1-19 | ◐ LIKELY ACTIVE |
| BCBoston Centerless INC | Woburn | MA | Machinery Manufacturing333319 | — | ◐ LIKELY ACTIVE |
| BCBoston Concrete Corp. | Lowell, MA | MA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| BWBoston Winery | Boston | MA | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| BBBradford & Bigelow, Inc. | Newburyport | MA | Printing and Related Support Activities323110 | 100-499 | ◐ LIKELY ACTIVE |
| BBBrady Built INC | Auburn | MA | Wood Product Manufacturing321911 | 20-99 | ◐ LIKELY ACTIVE |
| BBBrannen Brothers Flutemakers INC | Woburn | MA | Miscellaneous Manufacturing339992 | 20-99 | ◐ LIKELY ACTIVE |
| BRBreak Rock Brewing LLC | Quincy | MA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| BABrooks Automation, Inc. - Chelmsford | Chelmsford | MA | Machinery Manufacturing333242 | 500+ | ◐ LIKELY ACTIVE |
Cabot Coach Builders, INC. | Haverhill | MA | Transportation Equipment Manufacturing336111 | 20-99 | ◐ LIKELY ACTIVE |