| ESElectronic Sales of New England, LLC | Old Saybrook | CT | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| EDElevator Door Manufacturing | Oxford | CT | Machinery Manufacturing333921 | 20-99 | ◐ LIKELY ACTIVE |
| ECEljen Corporaton | Windsor | CT | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| ECEM Coating Services | New Britain | CT | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| EIEmpire Importers and Distributors, Inc. | Danbury | CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| EMEngineered Materials North Haven | North Haven | CT | Miscellaneous Manufacturing339991 | 100-499 | ◐ LIKELY ACTIVE |
| EAEnjet Aero New Britain | New Britain | CT | Transportation Equipment Manufacturing336412 | 20-99 | ◐ LIKELY ACTIVE |
| EAEnjet Aero Newington | Newington | CT | Transportation Equipment Manufacturing336412 | 20-99 | ◐ LIKELY ACTIVE |
Equipment Depot Northeast, Inc. - Wallingford | Wallingford | CT | Machinery Manufacturing333924 | 1-19 | ◐ LIKELY ACTIVE |
| EMESCO Maritime Solutions | Wallingford | CT | Computer and Electronic Product Manufacturing334416 | 20-99 | ◐ LIKELY ACTIVE |
| EEssex | Essex | CT | Fabricated Metal Product Manufacturing332911 | 100-499 | ◐ LIKELY ACTIVE |
EthosEnergy Accessories and Components - 64 Prospect | East Windsor | CT | Transportation Equipment Manufacturing336412 | 20-99 | ◐ LIKELY ACTIVE |
EthosEnergy Accessories and Components - 66 Prospect | East Windsor | CT | Transportation Equipment Manufacturing336412 | 20-99 | ◐ LIKELY ACTIVE |
| EMEuropean Meat Emporium | Fairfield | CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| ESEurpac Service Incorporated | Wilton | CT | Food Manufacturing311999 | — | ◐ LIKELY ACTIVE |
| FLFabbrica LLC Office + Factory | Windsor | CT | Fabricated Metal Product Manufacturing332323 | 100-499 | ◐ LIKELY ACTIVE |
| FFabrication | Seymour | CT | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| FPFaille Precision Machining | Baltic | CT | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| FAFairchild Auto-Mated Parts | Winsted | CT | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| FFairfield | Fairfield | CT | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| FPFairfield Processing Corporation | Fairfield Processing Corporation/88 Rose Hill Avenue/Danbury | CT | Chemical Manufacturing325220 | 20-99 | ◐ LIKELY ACTIVE |
| FSFifth State Distillery | Bridgeport | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| FCFirst Cut Barrel Co | Stamford | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
Flextronics International USA | Manchester | CT | Machinery Manufacturing333511 | 100-499 | ◐ LIKELY ACTIVE |
| FCFluid Connectors New Britain | New Britain | CT | Fabricated Metal Product Manufacturing332911 | 1-19 | ◐ LIKELY ACTIVE |
| FPForest Parkway | Shelton | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | 20-99 | ◐ LIKELY ACTIVE |
| FCFoxglove Cider | Niantic | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| FMFragrance Manufacturer | Milford | CT | Chemical Manufacturing325620 | 20-99 | ◐ LIKELY ACTIVE |
| GFGallucci's Fine Foods | Danbury | CT | Food Manufacturing311412 | 20-99 | ◐ LIKELY ACTIVE |
| GDGeneral Datacomm, INC. | Oxford | CT | Computer and Electronic Product Manufacturing334290 | — | ◐ LIKELY ACTIVE |
| GAGetinge Aseptic Solutions, LLC | New Milford | CT | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| GAGKN Aerospace Engine Systems, Newington | Newington | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| GNGlanbia Nutritionals (NA) Inc. - Orange | Orange | CT | Food Manufacturing311999 | 20-99 | ◐ LIKELY ACTIVE |
| GWGlenn's Wine | Westbrook | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| GHGoat Holdco, LLC | Bristol | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| GQGON Quikrete | Wauregan | CT | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| GVGouveia Vineyards | Wallingford | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| GPGovenors Park | Ridgefield | CT | Miscellaneous Manufacturing339920 | 1-19 | ◐ LIKELY ACTIVE |
| GJGrand Junction Millwork - BMD | Grand Junction | CT | Wood Product Manufacturing321911 | 1-19 | ◐ LIKELY ACTIVE |
| GRGreene Rubber Company | Danielson | CT | Plastics and Rubber Products Manufacturing326291 | 100-499 | ◐ LIKELY ACTIVE |
| GCGreenwich Ct Bakery | Greenwich | CT | Food Manufacturing311812 | 100-499 | ◐ LIKELY ACTIVE |
| GMGriff Metallizing Services | New Britain | CT | Paper Manufacturing322299 | 1-19 | ◐ LIKELY ACTIVE |
| GSGroup Six Marketing LLC | Simsbury | CT | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◐ LIKELY ACTIVE |
| GGroveFoods | Bethel | CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| GSG & S Scrap Metal | South Windsor | CT | Machinery Manufacturing333248 | 20-99 | ◐ LIKELY ACTIVE |
| HAHanwha Aerospace USA - East Windsor | East Windsor | CT | Transportation Equipment Manufacturing336412 | 20-99 | ◐ LIKELY ACTIVE |
| HAHanwha Aerospace USA - Newington | Newington | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| HLHarco LLC | Branford | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| HHHartford Hub | South Windsor | CT | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| HPHartford Precision Products dba Waterbury Swiss Automatics | Waterbury | CT | Fabricated Metal Product Manufacturing332721 | 1-19 | ◐ LIKELY ACTIVE |