| SCSpecialty Cable CORP | Wallingford | CT | Electrical Equipment, Appliance & Component Manufacturing335929 | — | ▲ REPORTED CLOSED |
| SSSunbelt Solomon Services-CTMT | Middleton | CT | Electrical Equipment, Appliance & Component Manufacturing335311 | 20-99 | ◐ LIKELY ACTIVE |
| TPThe Phoenix Company | Naugatuck | CT | Electrical Equipment, Appliance & Component Manufacturing335931 | 1-19 | ◐ LIKELY ACTIVE |
| 3W3m West Haven | West Haven | CT | Electrical Equipment, Appliance & Component Manufacturing335921 | — | ◇ UNVERIFIED |
| AIA.k.o., INC. Torque Specialties | Windsor | CT | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| AAramsco | Wallingford | CT | Electrical Equipment, Appliance & Component Manufacturing335210 | — | ◇ UNVERIFIED |
| ACA&t Communications, LLC | New Britain | CT | Electrical Equipment, Appliance & Component Manufacturing335921 | — | ◇ UNVERIFIED |
| BMBenick Machine Works, LLC | Putnam | CT | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| CICadenzia Innovations, INC. | Danbury | CT | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| CLCellpro LLC | Bristol | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| FAFood Automation-service Techniques INC | Stratford | CT | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| FEFuelcell Energy INC | Danbury | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| GCGe CO | Plainville | CT | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| GCGeneral Cable Industries | Dayville | CT | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| JBJasco Battery Specialist, Inc. | Oxford | CT | Electrical Equipment, Appliance & Component Manufacturing335912 | — | ◇ UNVERIFIED |
| JDJuniper Design Group Inc. | Southington | CT | Electrical Equipment, Appliance & Component Manufacturing335132 | — | ◇ UNVERIFIED |
| LLegrand | West Hartford | CT | Electrical Equipment, Appliance & Component Manufacturing335932 | — | ◇ UNVERIFIED |
 Linemaster Switch Corporation | Plainfield | CT | Electrical Equipment, Appliance & Component Manufacturing335314 | — | ◇ UNVERIFIED |
| LSLocknetics Security Eng | Forestville | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| NBNational Breaker Services (OHIO), L.L.C. | Waterbury | CT | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| NHNelson Heat Tracing Sys | East Granby | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| OCOSDA Contract Services INC | Milford | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| QIQtran, INC. | Milford | CT | Electrical Equipment, Appliance & Component Manufacturing335311 | — | ◇ UNVERIFIED |
| RPR. Piro Electric, LLC | Trumbull | CT | Electrical Equipment, Appliance & Component Manufacturing335932 | — | ◇ UNVERIFIED |
| SSensorworx | Wallingford | CT | Electrical Equipment, Appliance & Component Manufacturing335132 | — | ◇ UNVERIFIED |
| SPShore Power, INC. | Old Saybrook | CT | Electrical Equipment, Appliance & Component Manufacturing335911 | — | ◇ UNVERIFIED |
| TSThermal-Flex Systems, Inc. | Northford | CT | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
 Triumph Manufacturing, LLC | East Hartford | CT | Electrical Equipment, Appliance & Component Manufacturing335932 | — | ◇ UNVERIFIED |
| TATulimieri Associates, INC. | Glastonbury | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| UFUtc Fuel Cells L L C | South Windsor | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
