| LOLiberty Oil & Propane Equipment Co., Inc. | East Hartford | CT | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Bridgeport South Ave (5220) | Bridgeport | CT | Transportation Equipment Manufacturing336411 | 100-499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Stratford Main St (5225) | Stratford | CT | Transportation Equipment Manufacturing336411 | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Trumbull (5227) | Trumbull | CT | Transportation Equipment Manufacturing336411 | 100-499 | ◐ LIKELY ACTIVE |
| MMilford | Milford | CT | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| NNgsp-y798 | East Hartford | CT | Transportation Equipment Manufacturing336413 | 100-499 | ◐ LIKELY ACTIVE |
| NANumet Acquisition Aerocision, INC. | Chester | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| NMNumet Machining Tech | Orange | CT | Transportation Equipment Manufacturing336411 | 20-99 | ◐ LIKELY ACTIVE |
| PTParagon Tool Company, INC. the | Manchester | CT | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| PWPratt & Whitney East Hartford | East Hartford | CT | Transportation Equipment Manufacturing336412 | 500+ | ◐ LIKELY ACTIVE |
| PWPratt & Whitney Middletown | Middletown | CT | Transportation Equipment Manufacturing336412 | 500+ | ◐ LIKELY ACTIVE |
| PPProdigy Power LLC | Coventry | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| PAPursuit Aerospace DBA Whitcraft South Windsor | South Windsor | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| PAPursuit Aerospace - Manchester | Manchester | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| RDRD Dynamics Corp | Bloomfield | CT | Transportation Equipment Manufacturing336413 | 100-499 | ◐ LIKELY ACTIVE |
| RRRoll Rite Torrington | Torrington | CT | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| RCRtx Corporation | Middletown | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| SCS. Camerota & Sons INC. | Enfield | CT | Transportation Equipment Manufacturing336350 | 100-499 | ◐ LIKELY ACTIVE |
| SNSerco - New London, CT | New London | CT | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| SASikorsky Aircraft CORP | North Haven | CT | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| SASikorsky Aircraft Corporation | Main Shelton | CT | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| TGThule Group | Seymour | CT | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| TATriumph Actuation Systems - Connecticut, LLC | Windsor | CT | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| TGTriumph Group | West Hartford | CT | Transportation Equipment Manufacturing336413 | 500+ | ◐ LIKELY ACTIVE |
| TITru-hitch, INC. | Barkhamsted | CT | Transportation Equipment Manufacturing336212 | — | ◐ LIKELY ACTIVE |
| TTTurbine Technologies, INC | Farmington | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| TMTwin Manufacturing CO | South Windsor | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| TMTwin MRO | South Windsor | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| VEValpaks Engineering | Cheshire | CT | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| WLWhitcraft LLC DBA Pursuit Aerospace | Eastford, CT | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| AMAdmill Machine Co., LLC | New Britain | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| AAAndrew and Cristin Robb | Derby | CT | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| BTBudget Trasmission Center | West Haven | CT | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| BIBuiltRight Industries LLC | New Milford | CT | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| CTCamerota Truck Parts | Enfield | CT | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| CTConnecticut Tool & Mfg, Building 2 | Farmington | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| DTDefeo Transit Manufacturing & Supply, INC. | Brookfield | CT | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| DIDelta-Ray Industries, Inc. | Litchfield | CT | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| DIDynasys International | North Stonington | CT | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| EREra Replica Automobiles | New Britain | CT | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| FCFaircloth Composites LLC | Ellington | CT | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| FIFishers Island Ferry | New London | CT | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| FAForce Automation, Inc. | Bristol | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| GAGkn Aerospace Services Structures | Wallingford | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| GPGoodrich Pump & Engine Control Sys INC | West Hartford | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| HCHeico Corporation | Glastonbury | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| IPI.t.w. Powertrain Fastening | Naugatuck | CT | Transportation Equipment Manufacturing336370 | — | ◇ UNVERIFIED |
| JPJgs Property Dba R.a. Lalli, INC. | Stratford | CT | Machinery Manufacturing333298 | — | ◇ UNVERIFIED |
| MMMCB Marine LLC | Sherman | CT | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| MTMorgan Truck Body, LLC - Mct | Plainfield | CT | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |