| OIO&g Industries INC | Harwinton | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| PEPerkin Elmer Health Sciences | Shelton | CT | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| PUPharmacia & Upjohn (former) | North Haven | CT | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| PSPraxair Surface Technologies | Manchester | CT | Fabricated Metal Product Manufacturing332812 | — | ◐ LIKELY ACTIVE |
| PIPrestige Industrial Finishing | Shelton | CT | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| PIProspect Industries, LLC | Prospect | CT | Machinery Manufacturing333999 | — | ◐ LIKELY ACTIVE |
| PIProstar, INC. | Farmington | CT | Miscellaneous Manufacturing339999 | — | ◐ LIKELY ACTIVE |
| QCQuikrete - Connecticut Plant | Moosup | CT | Nonmetallic Mineral Product Manufacturing327999 | — | ◐ LIKELY ACTIVE |
REN Investment Group, Inc | South Windsor | CT | Machinery Manufacturing333999 | — | ◐ LIKELY ACTIVE |
| RTRoncari Trap Rock Quarry | East Granby | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| RCRsa CORP | Danbury | CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| SMScott's Metal Finishing LLC | Bristol | CT | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| SCSiemon CO | Watertown | CT | Fabricated Metal Product Manufacturing332116 | — | ◐ LIKELY ACTIVE |
| SMSiri Manufacturing Company, INC. | Danielson | CT | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| SASmiths Aerospace Components | Manchester | CT | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| SSSuber Steel Corporation | Stratford | CT | Wood Product Manufacturing321911 | — | ◐ LIKELY ACTIVE |
| TFThe Fletcher-terry Company, LLC. | East Berlin | CT | Fabricated Metal Product Manufacturing332212 | 20-99 | ◐ LIKELY ACTIVE |
| TCTilcon Connecticut INC | Old Saybrook | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TBTox Brewing Company, LLC | New London | CT | Beverage and Tobacco Product Manufacturing312120 | — | ◐ LIKELY ACTIVE |
| TUTreif USA INC. | Shelton | CT | Machinery Manufacturing333241 | 20-99 | ◐ LIKELY ACTIVE |
| WAWindsor Airmotive | East Granby | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| 1M100 Mechanic St | Pawcatuck | CT | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| 116-ct | Ellington | CT | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| 4A411 Austin Road | Waterbury | CT | Fabricated Metal Product Manufacturing332510 | 20-99 | ◐ LIKELY ACTIVE |
| 4L4shorepromos L.l.c. | Waterford | CT | Printing and Related Support Activities323113 | — | ◐ LIKELY ACTIVE |
| 9D908 Danbury | Danbury | CT | Computer and Electronic Product Manufacturing334516 | 20-99 | ◐ LIKELY ACTIVE |
| 9S908 Stamford | Stamford | CT | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| ASAalberts Surface Technologies Ab, INC. | Manchester | CT | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| AMABA-PGT Manchester Location | Manchester | CT | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| AVABA-PGT Vernon Location | Vernon | CT | Chemical Manufacturing325211 | 1-19 | ◐ LIKELY ACTIVE |
| A3Acmt 321 | Manchester | CT | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| ABACMT Bristol | Bristol | CT | Primary Metal Manufacturing331524 | 1-19 | ◐ LIKELY ACTIVE |
| AGAffordable Granite LLC | North Haven | CT | Furniture and Related Product Manufacturing337110 | — | ◐ LIKELY ACTIVE |
| AGAhh Generics | New Canaan | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| ALAirguard LLC | Fairfield | CT | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| ATAJ Tuck Company | Brookfield | CT | Fabricated Metal Product Manufacturing332813 | 1-19 | ◐ LIKELY ACTIVE |
| AAAlexis Aerospace Industries LLC | Canton | CT | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| ASAllied Sinterings Incorporated | Danbury | CT | Fabricated Metal Product Manufacturing332117 | 20-99 | ◐ LIKELY ACTIVE |
| AAAlpha Aero Draperies, INC. | Niantic | CT | Furniture and Related Product Manufacturing337920 | — | ◐ LIKELY ACTIVE |
| APAlthor Products, LLC | Windsor Locks | CT | Plastics and Rubber Products Manufacturing326150 | — | ◐ LIKELY ACTIVE |
| ASAmazon.com Services LLC - BDL7 | North Haven | CT | Printing and Related Support Activities323117 | 100-499 | ◐ LIKELY ACTIVE |
| AMAmerican Metal Crafters LLC | Middletown | CT | Fabricated Metal Product Manufacturing332439 | 20-99 | ◐ LIKELY ACTIVE |
| APAmerican Polyfilm, Inc. | Branford | CT | Plastics and Rubber Products Manufacturing326113 | 20-99 | ◐ LIKELY ACTIVE |
| ALAmericold Logistics | Suffield | CT | — | — | ◐ LIKELY ACTIVE |
| APAmgraph Packaging Watertown | Watertown | CT | Paper Manufacturing322220 | 1-19 | ◐ LIKELY ACTIVE |
| AIAmplified Ink CO | New Haven | CT | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| AAAmSty Allyn's Point | Gales Ferry | CT | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| ACAnalytical & Combustion Systems, INC | Bethel | CT | Machinery Manufacturing333414 | — | ◐ LIKELY ACTIVE |
| AAnsonia | Ansonia | CT | Machinery Manufacturing333993 | 20-99 | ◐ LIKELY ACTIVE |
| ABANVA - Berlin | Berlin | CT | Fabricated Metal Product Manufacturing332119 | 100-499 | ◐ LIKELY ACTIVE |