| CPCustom & Precision Products | Hamden | — | ◇ UNVERIFIED |
| DMDanjon Manufacturing Corporation | Cheshire | — | ◇ UNVERIFIED |
| DCDarly Custom Technology, INC. | Windsor | — | ◇ UNVERIFIED |
| DWDasco Welded Products, INC. | Waterbury | — | ◇ UNVERIFIED |
| DBDeco Blades LLC | Middletown | — | ◇ UNVERIFIED |
| DIDelta-Ray Industries, Inc. | Bridgeport | — | ◇ UNVERIFIED |
| DIDi-cor Industries, INC. | Bristol | — | ◇ UNVERIFIED |
| DPDs Precision Machine | Vernon Rockville | — | ◇ UNVERIFIED |
| DLDuctco, LLC | Bloomfield | — | ◇ UNVERIFIED |
| DMDurco Manfacturing CO. INC | Waterbury | — | ◇ UNVERIFIED |
| DMDurham Manufacturing CO | Durham | — | ◇ UNVERIFIED |
| DEDw Enterprise | Simsbury | — | ◇ UNVERIFIED |
| DADwyer Aluminum Mast Company | North Branford | — | ◇ UNVERIFIED |
| EAE a Patten | Columbia | — | ◇ UNVERIFIED |
| ECEast Coast Sheet Metal, LLC | Litchfield | — | ◇ UNVERIFIED |
| ECEast Coast Sheet Metal, LLC | Trumbull | — | ◇ UNVERIFIED |
| EDEastern Ducts LLC | Bozrah | — | ◇ UNVERIFIED |
| EMEastern Metal Treating | Enfield | — | ◇ UNVERIFIED |
| ECEngelhard CORP | East Windsor | — | ◇ UNVERIFIED |
| EME.s. Metal Fabrications, INC. | Terryville | — | ◇ UNVERIFIED |
| EBEtherington Brothers | Bristol | — | ◇ UNVERIFIED |
| ECExmet CORP | Naugatuck | — | ◇ UNVERIFIED |
| EPExperimental Prototype Products, INC. | South Windsor | — | ◇ UNVERIFIED |
| EDEyelet Design, INC | Waterbury | — | ◇ UNVERIFIED |
| ELEz4x4, LLC | Waterbury | — | ◇ UNVERIFIED |
| FIFairchild Industires Inc. | Winchester | — | ◇ UNVERIFIED |
| FSFairfield Steel Works LLC | Shelton | — | ◇ UNVERIFIED |
| FFF. F. Screw Products INC | Southington | — | ◇ UNVERIFIED |
| FHFirst Heating & Cooling LLC | New Canaan | — | ◇ UNVERIFIED |
| FHFirst Heating & Cooling LLC | Bridgeport | — | ◇ UNVERIFIED |
| FSFjc Services LLC | Plymouth | — | ◇ UNVERIFIED |
| FSFlight Support, INC. | North Haven | — | ◇ UNVERIFIED |
| FCFluid Control Solutions, LLC | Plainville | — | ◇ UNVERIFIED |
| FFFocus Fabrication, LLC | Woodstock | — | ◇ UNVERIFIED |
| FMForrest Machine, INC. | Rocky Hill | — | ◇ UNVERIFIED |
| FSFour Star Manufacturing Company | Bristol | — | ◇ UNVERIFIED |
| FAFritz Air, LLC | Torrington | — | ◇ UNVERIFIED |
| GMG&M Machine Co., LLC | New Britain | — | ◇ UNVERIFIED |
| GMGemco Manufacturing Company, INC | Southington | — | ◇ UNVERIFIED |
| GFGeneral Fabricators, INC | Stamford | — | ◇ UNVERIFIED |
| GFGeomatrix Fabrication, LLC | Hamden | — | ◇ UNVERIFIED |
| GHGlasco Heating & Air Conditioning, INC. | South Windsor | — | ◇ UNVERIFIED |
| GLG L C Associates | Thomaston | — | ◇ UNVERIFIED |
| GMGmt Manufacturing Company, INC. | Plantsville | — | ◇ UNVERIFIED |
| GMGreer Manufacturing, INC. | Prospect | — | ◇ UNVERIFIED |
| GTGregor Technologies, LLC | Torrington | — | ◇ UNVERIFIED |
| HBH B Ives CO (harrow Products) | New Haven | — | ◇ UNVERIFIED |
| HIHdb, INC. | Winsted | — | ◇ UNVERIFIED |
| HPHeleniak Properties, LLC | Plainville | — | ◇ UNVERIFIED |
| HHHolzknecht Holding, LLC | Putnam | — | ◇ UNVERIFIED |
