| ATAccu Trak Tool Corporation | Cherry Valley | MA | Machinery Manufacturing333517 | 20-99 | ◐ LIKELY ACTIVE |
| AMActon Metal Processing Corporation | Waltham | MA | Fabricated Metal Product Manufacturing332812 | 1-19 | ◐ LIKELY ACTIVE |
Adam Graphic Corporation | North Attleboro | MA | Printing and Related Support Activities323113 | 1-19 | ◐ LIKELY ACTIVE |
Admet, INC. | Norwood | MA | Computer and Electronic Product Manufacturing334513 | 20-99 | ◐ LIKELY ACTIVE |
Advanced Imaging INC | Wilmington | MA | Printing and Related Support Activities323111 | — | ◐ LIKELY ACTIVE |
| AMAero Manufacturing CORP | Beverly | MA | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| ABAlbert Basse Associates, INC | Stoughton | MA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| APAlnylam Pharmaceuticals INC | Norton | MA | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| ACAlpha Chemical Services | Stoughton | MA | Chemical Manufacturing325188 | 20-99 | ◐ LIKELY ACTIVE |
| ASAmerican Science & Engineering | Billerica | MA | Computer and Electronic Product Manufacturing334517 | — | ◐ LIKELY ACTIVE |
American Surgical Company, LLC | Salem | MA | Miscellaneous Manufacturing339113 | 20-99 | ◐ LIKELY ACTIVE |
| ALAM Lithography Corporation | Chicopee | MA | Printing and Related Support Activities323110 | 100-499 | ◐ LIKELY ACTIVE |
| ASArclin Surfaces LLC | East Longmeadow | MA | Wood Product Manufacturing321918 | 20-99 | ◐ LIKELY ACTIVE |
Atlee CORP | Tewksbury | MA | Fabricated Metal Product Manufacturing332510 | — | ◐ LIKELY ACTIVE |
| AZAvedis Zildjian Company | Norwell | MA | Miscellaneous Manufacturing339992 | 100-499 | ◐ LIKELY ACTIVE |
| AWA W Chesterton CO | Groveland | MA | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| BEBarber Electric Enclosures Mfg. Co., INC. | North Attleboro | MA | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| BABemis Associates INC | Shirley | MA | Chemical Manufacturing325520 | 100-499 | ◐ LIKELY ACTIVE |
| BCBenevento Companies | Wilmington | MA | Printing and Related Support Activities323121 | 1-19 | ◐ LIKELY ACTIVE |
| BOBern Optics INC | Westfield | MA | Machinery Manufacturing333314 | 20-99 | ◐ LIKELY ACTIVE |
| BFBete Fog Nozzle INC. | Greenfield | MA | Fabricated Metal Product Manufacturing332919 | 100-499 | ◐ LIKELY ACTIVE |
| BPBiomedical Polymers INC | Sterling | MA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
Blauer Manufacturing Co., INC. | Boston | MA | Apparel Manufacturing315250 | 100-499 | ◐ LIKELY ACTIVE |
| BWBrookfield Wire CO INC | West Brookfield | MA | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| CICai INC | Georgetown | MA | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| CECartamundi East Longmeadow LLC | East Longmeadow | MA | Paper Manufacturing322299 | 100-499 | ◐ LIKELY ACTIVE |
| CICastle Island Brewing Co. | Norwood | MA | Beverage and Tobacco Product Manufacturing312130 | 20-99 | ◐ LIKELY ACTIVE |
Caton Connector Corporation | Kingston | MA | Computer and Electronic Product Manufacturing334417 | 20-99 | ◐ LIKELY ACTIVE |
| CGChas G Allen CO INC | Barre | MA | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| CPChicopee Provision Company | Chicopee | MA | Food Manufacturing311612 | 20-99 | ◐ LIKELY ACTIVE |
| CCChurchill CORP | Melrose | MA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| CCCold Chain Technologies | Franklin | MA | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| CCovidien | Mansfield | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◐ LIKELY ACTIVE |
| CICurtis Industries LLC | West Boylston | MA | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| DCDampney Company INC | Everett | MA | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| DIDeangelis Iron Works INC | South Easton | MA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| DPDeerfield Packaging Services | Turners Falls | MA | Fabricated Metal Product Manufacturing332212 | 20-99 | ◐ LIKELY ACTIVE |
| DRDexter Russell INC | Southbridge | MA | Fabricated Metal Product Manufacturing332211 | 100-499 | ◐ LIKELY ACTIVE |
| DPDuc Pac Corporation the | Springfield | MA | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| DGDuncan Galvanizing Corp | Everett | MA | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| EIEconocorp INC | Randolph | MA | Machinery Manufacturing333298 | 20-99 | ◐ LIKELY ACTIVE |
Eis Wire & Cable, INC. | South Hadley | MA | Primary Metal Manufacturing331422 | 20-99 | ◐ LIKELY ACTIVE |
| EAElectronic Assemblies Mfg. INC. | Methuen | MA | Computer and Electronic Product Manufacturing334419 | 1-19 | ◐ LIKELY ACTIVE |
Emc Technologies, INC. | Fall River | MA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| EMEngineered Materials Solutions INC | Attleboro | MA | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
Epic Enterprises INC | Ayer | MA | Beverage and Tobacco Product Manufacturing312111 | 100-499 | ◐ LIKELY ACTIVE |
| EPErving Paper Mills | Erving | MA | Paper Manufacturing322110 | 100-499 | ◐ LIKELY ACTIVE |
Evans Industries, Inc. | Topsfield | MA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| ETExcelitas Technologies | Billerica | MA | Computer and Electronic Product Manufacturing334413 | 100-499 | ◐ LIKELY ACTIVE |
Excelitas Technologies CORP. | Salem | MA | Computer and Electronic Product Manufacturing334411 | — | ◐ LIKELY ACTIVE |