| AMAdvance Manufacturing | Westfield, MA | Food Manufacturing311111 | — | ◐ LIKELY ACTIVE |
| AMAdvance Mfg CO INC | Westfield, City of, MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| ALAM Lithography Corporation | Chicopee, MA | Printing and Related Support Activities323110 | 100–499 | ◐ LIKELY ACTIVE |
| APAndritz Paperchine | Springfield, MA | Machinery Manufacturing333243 | 20–99 | ◐ LIKELY ACTIVE |
| AEAssociated Electro Mechanics INC | Springfield, MA | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
Cenveo Worldwide Ltd. Chicopee | Chicopee, MA | Paper Manufacturing322230 | 100–499 | ◐ LIKELY ACTIVE |
| DIDfa Ice Cream - Wilbraham Ma | Wilbraham, MA | Food Manufacturing311520 | 100–499 | ◐ LIKELY ACTIVE |
| ECElectronic Coil | Westfield, MA | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| FMFp Mcnamara Rubbish Removal INC | Springfield, MA | Fabricated Metal Product Manufacturing332111 | — | ◐ LIKELY ACTIVE |
| GAGeneral Abrasives | Westfield, MA | Nonmetallic Mineral Product Manufacturing327910 | — | ◐ LIKELY ACTIVE |
| GAGovernors America Corporation | Agawam, MA | Machinery Manufacturing333618 | — | ◐ LIKELY ACTIVE |
Gregory Manufacturing INC | Holyoke, MA | Plastics and Rubber Products Manufacturing326199 | 20–99 | ◐ LIKELY ACTIVE |
| IDIron Duke Brewing LLC. | Ludlow, MA | Beverage and Tobacco Product Manufacturing312120 | — | ◐ LIKELY ACTIVE |
| JCJen Coat INC Dba Proampac | Westfield, MA | Paper Manufacturing322220 | — | ◐ LIKELY ACTIVE |
| LLLitron, LLC | Agawam, MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| LLLongcap Lamson Products | Westfield, MA | Fabricated Metal Product Manufacturing332211 | 20–99 | ◐ LIKELY ACTIVE |
| LTLudlow Tool INC | Agawam, MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MMMitchell Machine INC | Springfield, MA | Machinery Manufacturing333249 | — | ◐ LIKELY ACTIVE |
| NENew England Tele | Springfield, MA | Miscellaneous Manufacturing339999 | — | ◐ LIKELY ACTIVE |
| PPPalmer Paving CORP | Palmer, MA | Petroleum and Coal Products Manufacturing324110 | — | ◐ LIKELY ACTIVE |
| PPPalmer Paving CORP | Springfield, MA | Petroleum and Coal Products Manufacturing324110 | — | ◐ LIKELY ACTIVE |
Paragon Manufacturing | Westfield, MA | Fabricated Metal Product Manufacturing332710 | 20–99 | ◐ LIKELY ACTIVE |
| PMPoly Metal Finishing INC | Springfield, MA | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| RRR. R. Leduc CORP. | Holyoke, MA | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| SCSmurfit-stone Container CORP | Springfield, MA | Paper Manufacturing322211 | — | ◐ LIKELY ACTIVE |
| TNThe Newark Group, INC. | Chicopee, MA | Paper Manufacturing322130 | — | ◐ LIKELY ACTIVE |
| TPTrue Precision Industries, INC. | West Springfield, MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| WGWestfield Gage CO INC | Southwick, MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| WRWestlake Royal Building Products (Kleer Lumber) | Westfield, MA | Plastics and Rubber Products Manufacturing326199 | 20–99 | ◐ LIKELY ACTIVE |
| CXChem X LLC | Agawam, MA | Machinery Manufacturing333319 | — | ◐ LIKELY ACTIVE |
| FFFarmland Foods Carando Division | Springfield, MA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| GAGulfstream Aerospace | Westfield, MA | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| HFHampden Fence Supply | Agawam, MA | Fabricated Metal Product Manufacturing332116 | — | ◐ LIKELY ACTIVE |
| MMMustang Motorcycle Products | Three Rivers, MA | Printing and Related Support Activities323111 | — | ◐ LIKELY ACTIVE |
| PRPhelon R E CO INC | Wilbraham, MA | Fabricated Metal Product Manufacturing332431 | — | ◐ LIKELY ACTIVE |
| PIPlacon Im INC | West Springfield, MA | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| TOTed Ondrick Materials and Construction | Chicopee, MA | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TSTrew Stone, LLC (plant #4) | Springfield, MA | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| UMUtility Manufacturing CO | Wilbraham, MA | Primary Metal Manufacturing331111 | — | ◐ LIKELY ACTIVE |
| APAdams Pakkawood/xidex Area | Holyoke, MA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| AAdaptas | Palmer, MA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| ASAerospace Support | Agawam, MA | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| ACAir Compressor Engineering CO | Westfield, MA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| ADAlden Div of Mrc | West Springfield, MA | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| ACAmpad CORP | Holyoke, MA | Paper Manufacturing322230 | — | ◇ UNVERIFIED |
| ACAmpad Corporation | Holyoke, MA | Paper Manufacturing322230 | — | ◇ UNVERIFIED |
| ANAnitec Newspaper Sales Division of Kodak Polychrome Graphics | Holyoke, MA | Printing and Related Support Activities323122 | — | ◇ UNVERIFIED |
| ADAvery Dennison CORP | Holyoke, MA | Printing and Related Support Activities323118 | — | ◇ UNVERIFIED |
| ADAvery Dennison Corporation | Chicopee, MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| APAvista Pharma Solutions | Agawam, MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |