| JTJeff The Butcher Company | Westfield | MA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| KWKamps Westfield | Westfield | MA | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| KFKosinski Farms | Westfield | MA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PGPerma Graphics INC | Westfield | MA | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| WPWestfield Plant | Westfield | MA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| WCWhip City Jerky, LLC | Westfield | MA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| BPB&d Pallet,building and Industrial Supply Co.,inc | Westfield | MA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| CRCemex Rinker Materials - Concrete Pipes | Westfield | MA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| CLCenterprise LLC | Westfield | MA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| CKChalmers & Kubeck North | Westfield | MA | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| DPDan Puza, Jr. | Westfield | MA | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| JBJJM Boiler Works, Inc. | Westfield | MA | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| KPKg Pallet,llc | Westfield | MA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| KBKismet Brewing Company, LLC | Westfield | MA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| LELent's Enterprises, INC. | Westfield | MA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| LSLynx Specialty Tapes Inc. | Westfield | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| MTMainline Tool and Grind INC | Westfield | MA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| MIMestek INC Dadanco | Westfield | MA | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| MPMillennium Power Services, Inc. | Westfield | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MSMoren Signs INC | Westfield | MA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| OCOld Colony Envelope | Westfield | MA | Paper Manufacturing322230 | — | ◇ UNVERIFIED |
| PTPatton Tool Company | Westfield | MA | Fabricated Metal Product Manufacturing332216 | — | ◇ UNVERIFIED |
| PHPonders Hollow Custom Wood | Westfield | MA | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| PProlamina | Westfield | MA | Paper Manufacturing322222 | — | ◇ UNVERIFIED |
| QMQual-tech Mfg., INC | Westfield | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| SBSkyline Beer Company LLC | Westfield | MA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| SWSullivan Westfield Properties | Westfield | MA | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Westfield | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| VTVector Tool & Die Corp. | Westfield | MA | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| WAWestek Architectural Woodworking, Incorporated | Westfield | MA | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| WMWestfield Museum INC | Westfield | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WRWestlake Royal Building Products Kleer | Westfield | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
