| CMColumbia Manufacturing INC | Westfield | MA | Machinery Manufacturing333112 | 20-99 | ● ACTIVE |
| JSJarvis Surgical | Westfield | MA | Miscellaneous Manufacturing339112 | 20-99 | ● ACTIVE |
Manufacturing Technology Group, INC | Westfield | MA | Fabricated Metal Product Manufacturing332999 | 20-99 | ● ACTIVE |
Millrite Machine INC. | Westfield | MA | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
Paragon Mfg., INC. | Westfield | MA | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
Peerless Precision, INC. | Westfield | MA | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
Seal-ryt CORP. | Westfield | MA | Miscellaneous Manufacturing339991 | 20-99 | ● ACTIVE |
Transcon Technologies, LLC | Westfield | MA | Computer and Electronic Product Manufacturing334416 | 20-99 | ● ACTIVE |
| BOBern Optics INC | Westfield | MA | Machinery Manufacturing333314 | 20-99 | ◐ LIKELY ACTIVE |
| IPIndustrial Precision, INC | Westfield | MA | Fabricated Metal Product Manufacturing332710 | 20-99 | ▲ REPORTED CLOSED |
| MAMicro Abrasives CORP | Westfield | MA | Nonmetallic Mineral Product Manufacturing327910 | 20-99 | ◐ LIKELY ACTIVE |
| WRWestlake Royal Building Products (Kleer Lumber) | Westfield | MA | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| LLLongcap Lamson Products | Westfield | MA | Fabricated Metal Product Manufacturing332211 | 20-99 | ◐ LIKELY ACTIVE |
Paragon Manufacturing | Westfield | MA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| DLDion Label Printing, LLC. | Westfield | MA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| JHJames Hardie Building Products, Inc. Westfield | Westfield | MA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| KWKamps Westfield | Westfield | MA | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |