Summit Corporation of America | Thomaston | CT | Fabricated Metal Product Manufacturing332812 | 20-99 | ● ACTIVE |
| TCTreadwell Corporation (delaware) | Thomaston | CT | Machinery Manufacturing333998 | 20-99 | ● ACTIVE |
Baird Machinery CORP | Thomaston | CT | Machinery Manufacturing333513 | — | ● ACTIVE |
Ward Leonard Ct LLC | Thomaston | CT | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ● ACTIVE |
Intrasonics, INC. | Thomaston | CT | Computer and Electronic Product Manufacturing334419 | — | ● ACTIVE |
Petit Tool CO. the | Thomaston | CT | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SEStewart Efi Ct LLC | Thomaston | CT | Fabricated Metal Product Manufacturing332119 | 20-99 | ◐ LIKELY ACTIVE |
| CSCoreslab Structures (conn), INC | Thomaston | CT | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| USUnimetal Surface Finishing, LLC | Thomaston | CT | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
Brookfield Industries, INC. | Thomaston | CT | Machinery Manufacturing333924 | — | ◐ LIKELY ACTIVE |
| ESEdward Segal INC | Thomaston | CT | Machinery Manufacturing333249 | 20-99 | ▲ REPORTED CLOSED |
| SCStevens CO INC | Thomaston | CT | Fabricated Metal Product Manufacturing332116 | 20-99 | ◐ LIKELY ACTIVE |
| RDRexam Dispensing Systems | Thomaston | CT | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| SEStewart EFI CT Warehouse | Thomaston | CT | Fabricated Metal Product Manufacturing332119 | 1-19 | ◐ LIKELY ACTIVE |
| UTUniMetal Thomaston | Thomaston | CT | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| AMAtlantic Manufacturing, INC. | Thomaston | CT | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| FIFutureswiss International LLC | Thomaston | CT | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| GLG L C Associates | Thomaston | CT | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| WFWhyco Finishing Tech INC | Thomaston | CT | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |