Camm Metals, INC | East Windsor | 1–19 | ● ACTIVE |
Canton, INC. | North Branford | 1–19 | ● ACTIVE |
Capewell Aerial Systems LLC | South Windsor | 20–99 | ● ACTIVE |
| CMCarey Manufacturing Co, INC | Cromwell | 20–99 | ● ACTIVE |
| CMCarpin Mfg, INC | Waterbury | 20–99 | ● ACTIVE |
| CICarten-fujikin Incorporated | Cheshire | 20–99 | ● ACTIVE |
Ccr Products, LLC | West Hartford | 20–99 | ● ACTIVE |
| CSCentury Spring Mfg. CO INC | Bristol | 20–99 | ● ACTIVE |
Century Tool CO INC | Thompson | 1–19 | ● ACTIVE |
Chapco INC | Chester | — | ● ACTIVE |
| CJCollins & Jewell Company, INC. | Bozrah | 20–99 | ● ACTIVE |
| CBColonial Bronze Company | Torrington | 20–99 | ● ACTIVE |
| CCColonial Coatings Corporation | Milford | 20–99 | ● ACTIVE |
Colt's Manufacturing Company, LLC | West Hartford | 100–499 | ● ACTIVE |
| CICompanion Industries, INC. | Southington | 20–99 | ● ACTIVE |
| CAConnecticut Anodizing & Finishing CO INC | Bridgeport | 20–99 | ● ACTIVE |
Connecticut Spring & Stamping Corporation the | Farmington | 100–499 | ● ACTIVE |
| CIConsolidated Industries Acquisition Corporation | Cheshire | — | ● ACTIVE |
| CRCorbin Russwin | Berlin | 100–499 | ● ACTIVE |
Cornell-carr Co., INC. | Monroe | 20–99 | ● ACTIVE |
Coronet Machinery CORP. | Bethel | 20–99 | ● ACTIVE |
Creed 2.0, LLC | New Britain | 100–499 | ● ACTIVE |
Crescent Manufacturing Operating Company | Burlington | 20–99 | ● ACTIVE |
| CMC-tech Manufacturing Co., LLC | Watertown | 1–19 | ● ACTIVE |
C V Tool Company INC | Southington | 20–99 | ● ACTIVE |
| DWDasco Welded Products, INC. | Waterbury | 1–19 | ● ACTIVE |
Dcg Precision Manufacturing Limited Liability Company | Bethel | — | ● ACTIVE |
| DPDel-tron Precision INC | Bethel | 20–99 | ● ACTIVE |
Devon Precision Industries, INC | Wolcott | 20–99 | ● ACTIVE |
Dexmet Corporation | Wallingford | — | ● ACTIVE |
Di-el Tool & Manufacturing INC | Meriden | 1–19 | ● ACTIVE |
| D5Division 5 LLC | Stafford Springs | 1–19 | ● ACTIVE |
| DCDonham Craft | Naugatuck | — | ● ACTIVE |
| DCDonwell Co, the | Manchester | 20–99 | ● ACTIVE |
| DIDyco Industries, INC | South Windsor | 1–19 | ● ACTIVE |
| EBEast Branch Engineering & Manufacturing, INC. | New Milford | 1–19 | ● ACTIVE |
| EMEastern Metal Treating | Enfield | 1–19 | ● ACTIVE |
Eastern Metal Works, INC. | Milford | 20–99 | ● ACTIVE |
| ECEbtec Corporation | East Windsor | — | ● ACTIVE |
Edco Engineering INC. | Newington | 20–99 | ● ACTIVE |
| EMEdson Manufacturing, INC | Wolcott | 20–99 | ● ACTIVE |
| EJE & J Parts Cleaning CO | Waterbury | 20–99 | ● ACTIVE |
| ETElectro Technologies INC | Cheshire | 20–99 | ● ACTIVE |
| EIEmpire Industries, Inc. | Manchester | 100–499 | ● ACTIVE |
Enfield Technologies LLC | Trumbull | 1–19 | ● ACTIVE |
| EBEnsign Bickford Aerospace & Defense CO | Simsbury | 500+ | ● ACTIVE |
| ELE.r.w., LLC | Putnam | 20–99 | ● ACTIVE |
Esteem Manufacturing Corporation | South Windsor | 20–99 | ● ACTIVE |
Fairchild Industries INC | Winsted | 1–19 | ● ACTIVE |
Fenn LLC | East Berlin | 20–99 | ● ACTIVE |