United Electric Controls CO | Milford | — | ● ACTIVE |
Universal Body and Equipment Company, LLC | Watertown | — | ● ACTIVE |
Whitcraft South Windsor LLC | South Windsor | — | ● ACTIVE |
| BABarnes Aerospace | Windsor | — | ◐ LIKELY ACTIVE |
| ALAerocision LLC | Chester | 20–99 | ◐ LIKELY ACTIVE |
Bracone Metal Spinning, INC. | Southington | — | ◐ LIKELY ACTIVE |
| CMColumbia Manufacturing, INC. | Columbia | 20–99 | ◐ LIKELY ACTIVE |
| HAHanwha Aerospace USA | Glastonbury | 20–99 | ◐ LIKELY ACTIVE |
| MTMetals Testing CO | South Windsor | — | ◐ LIKELY ACTIVE |
| MTMorgan Truck Body LLC - Mct | Moosup | 100–499 | ◐ LIKELY ACTIVE |
| NINickson Industries | Plainville | 20–99 | ◐ LIKELY ACTIVE |
| PWPratt & Whitney | Middletown | — | ◐ LIKELY ACTIVE |
| PWPratt & Whitney, Division of Rtx CORP | East Hartford | — | ◐ LIKELY ACTIVE |
Ren Investment Group, INC | Suffield | — | ◐ LIKELY ACTIVE |
| SASikorsky Aircraft Headquarters | Stratford | — | ◐ LIKELY ACTIVE |
| TSThe Sterling Engineering Corporation | Barkhamsted | 20–99 | ▲ REPORTED CLOSED |
| TATriumph Actuation Systems | Windsor | 100–499 | ◐ LIKELY ACTIVE |
| UEUnison Engine Components | Manchester | — | ◐ LIKELY ACTIVE |
| UNU.s. Naval Submarine Base New London (subasenlon) | Groton | — | ◐ LIKELY ACTIVE |
| TPTect Power | Newington | — | ◐ LIKELY ACTIVE |
| EAEdac Aero Rotating Components | Newington | — | ◇ UNVERIFIED |
| HCHowmet Castings | Winsted | — | ◇ UNVERIFIED |
| PMParadigm Manchester INC | Manchester | — | ◇ UNVERIFIED |
| ASAlloy Specialties LLC | Manchester | 20–99 | ◐ LIKELY ACTIVE |
Beta Shim CO. | Shelton | — | ◐ LIKELY ACTIVE |
Brandstrom Instruments, INC. | Ridgefield | — | ◐ LIKELY ACTIVE |
Fibre Tech Usa, LLC | Stamford | — | ◐ LIKELY ACTIVE |
Joval Machine CO INC | Yalesville | — | ◐ LIKELY ACTIVE |
| MSMarine Special Products Group, LLC | Essex | — | ◐ LIKELY ACTIVE |
Waveaerospace INC | Old Greenwich | — | ◐ LIKELY ACTIVE |
| AIAtlantic Inertial Systems INC | Cheshire | — | ◐ LIKELY ACTIVE |
| BIBauer INC | Bristol | 100–499 | ◐ LIKELY ACTIVE |
| BAB&n Aerospace, INC. | Newington | — | ◐ LIKELY ACTIVE |
| DIDelta Industries, INC. | East Granby | — | ◐ LIKELY ACTIVE |
| DGDrivesol Global Steering | Watertown | — | ◐ LIKELY ACTIVE |
| ECEbtec Corporation | East Windsor | — | ◐ LIKELY ACTIVE |
| EOE O Manufacturing Company, INC. | West Haven | — | ◐ LIKELY ACTIVE |
| GAGkn Aerospace Newington LLC | Newington | — | ◐ LIKELY ACTIVE |
| GAGkn Aerospace Services Structures LLC | Cromwell | — | ◐ LIKELY ACTIVE |
| GTGlobal Turbine Component Technologies, LLC | South Windsor | — | ◐ LIKELY ACTIVE |
| HSHamilton Sundstrand Corporation | Windsor Locks | — | ◐ LIKELY ACTIVE |
| KAKaman Aerospace Helicopters Division | Bloomfield | — | ◐ LIKELY ACTIVE |
| LELeading Edge Aero, LLC | Bethel | — | ◐ LIKELY ACTIVE |
| TSThames Shipyard & Repair | New London | — | ◐ LIKELY ACTIVE |
| SASikorsky Aircraft Corporation | Stratford | — | ◐ LIKELY ACTIVE |
| AMAnstro Mfg CO | Wolcott | — | ◇ UNVERIFIED |
| BMBirken Manufacturing Company, INC. | Bloomfield | — | ◇ UNVERIFIED |
| CPCasco Products Corporation | Bridgeport | — | ◇ UNVERIFIED |
| ETEdac Technologies LLC | Cheshire | — | ◇ UNVERIFIED |
| FPFranklin Producst INC | Torrington | — | ◇ UNVERIFIED |