| EJE & J Parts Cleaning CO | Waterbury | CT | Fabricated Metal Product Manufacturing332813 | 20-99 | ● ACTIVE |
| EBElectric Boat Company | Groton | CT | Transportation Equipment Manufacturing336611 | 500+ | ● ACTIVE |
| ECElectric Cable Compounds | Naugatuck | CT | Chemical Manufacturing325212 | 20-99 | ● ACTIVE |
| EIElectro-methods, INC. | South Windsor | CT | Transportation Equipment Manufacturing336412 | 100-499 | ● ACTIVE |
Electro-methods, L.p. | South Windsor | CT | Transportation Equipment Manufacturing336412 | 100-499 | ● ACTIVE |
| ETElectro Technologies INC | Cheshire | CT | Fabricated Metal Product Manufacturing332721 | 20-99 | ● ACTIVE |
Elidah INC | Newtown | CT | Computer and Electronic Product Manufacturing334510 | — | ● ACTIVE |
| EIElm-cap Industries, INC | West Hartford | CT | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ● ACTIVE |
Elm Press, Incorporated, the | Terryville | CT | Printing and Related Support Activities323110 | 20-99 | ● ACTIVE |
Embalmers' Supply Company, the | East Lyme | CT | Chemical Manufacturing325998 | — | ● ACTIVE |
| EGEmhart Glass Manufacturing INC | Windsor | CT | Printing and Related Support Activities323111 | 100-499 | ● ACTIVE |
| EIEmpire Industries, Inc. | Manchester | CT | Fabricated Metal Product Manufacturing332999 | 100-499 | ● ACTIVE |
Empire Tool LLC | Derby | CT | Machinery Manufacturing333511 | 1-19 | ● ACTIVE |
Enfield Technologies LLC | Trumbull | CT | Fabricated Metal Product Manufacturing332912 | 1-19 | ● ACTIVE |
| ETEnfield Testing & Balancing, INC. | Enfield | CT | Transportation Equipment Manufacturing336413 | — | ● ACTIVE |
Enjet Aero Bloomfield, LLC | Bloomfield | CT | Transportation Equipment Manufacturing336412 | 100-499 | ● ACTIVE |
| EBEnsign Bickford Aerospace & Defense CO | Simsbury | CT | Fabricated Metal Product Manufacturing332992 | 500+ | ● ACTIVE |
Ensinger Precision Components, INC. | Putnam | CT | Plastics and Rubber Products Manufacturing326199 | 20-99 | ● ACTIVE |
| EPEnvipco (environmental Products Corporation) | Naugatuck | CT | Machinery Manufacturing333319 | 100-499 | ● ACTIVE |
Environics INC. | Tolland | CT | Computer and Electronic Product Manufacturing334513 | 1-19 | ● ACTIVE |
| EMEppendorf Manufacturing | Enfield | CT | Plastics and Rubber Products Manufacturing326199 | 100-499 | ● ACTIVE |
| ELE.r.w., LLC | Putnam | CT | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
Essential Trading Systems CORP | Colchester | CT | Computer and Electronic Product Manufacturing334290 | 1-19 | ● ACTIVE |
Esteem Manufacturing Corporation | South Windsor | CT | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
Ez Form Cable Technologies, LLC | Hamden | CT | Electrical Equipment, Appliance & Component Manufacturing335929 | 20-99 | ● ACTIVE |
Fairchild Industries INC | Winsted | CT | Fabricated Metal Product Manufacturing332721 | 1-19 | ● ACTIVE |
| FCFairfield County Millwork INC. | Bethany | CT | Wood Product Manufacturing321918 | 20-99 | ● ACTIVE |
| FCFairfield Crystal Technology, LLC | New Milford | CT | Miscellaneous Manufacturing339999 | 1-19 | ● ACTIVE |
Faria Beede Instruments, INC. | North Stonington | CT | Computer and Electronic Product Manufacturing334513 | 20-99 | ● ACTIVE |
Fenn LLC | East Berlin | CT | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
F & F Concrete Corporation, the | Plantsville | CT | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ● ACTIVE |
Fiberoptics Technology, INC. | Pomfret | CT | Machinery Manufacturing333314 | 100-499 | ● ACTIVE |
Fiberqa, LLC | Old Lyme | CT | Computer and Electronic Product Manufacturing334519 | 1-19 | ● ACTIVE |
Fimor North America, INC. | Cheshire | CT | Plastics and Rubber Products Manufacturing326150 | 1-19 | ● ACTIVE |
First Aviation Services INC | Westport | CT | Transportation Equipment Manufacturing336413 | 100-499 | ● ACTIVE |
Fischer Technology, INC. | Windsor | CT | Computer and Electronic Product Manufacturing334519 | 20-99 | ● ACTIVE |
| FCFlagship Converters, INC | Danbury | CT | Plastics and Rubber Products Manufacturing326112 | 20-99 | ● ACTIVE |
| FSFlight Support, INC. | North Haven | CT | Transportation Equipment Manufacturing336412 | — | ● ACTIVE |
| FMFocus Medical, LLC | Bethel | CT | Computer and Electronic Product Manufacturing334510 | 1-19 | ● ACTIVE |
Forestville Manufacturing Company the | Bristol | CT | Fabricated Metal Product Manufacturing332722 | 1-19 | ● ACTIVE |
| FMForrest Machine Inc. | Berlin | CT | Fabricated Metal Product Manufacturing332710 | 20-99 | ● ACTIVE |
Forster Precision Tool, LLC | Seymour | CT | Fabricated Metal Product Manufacturing332710 | 1-19 | ● ACTIVE |
Foster, LLC | Putnam | CT | Chemical Manufacturing325991 | 20-99 | ● ACTIVE |
| FPFranklin Producst INC | Torrington | CT | Transportation Equipment Manufacturing336360 | 100-499 | ● ACTIVE |
Frank Roth CO INC | Stratford | CT | Fabricated Metal Product Manufacturing332721 | 20-99 | ● ACTIVE |
| FFrito-lay | Killingly (dayville) | CT | Food Manufacturing311919 | — | ● ACTIVE |
Fuelcell Energy INC | Torrington | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | 100-499 | ● ACTIVE |
Fuelcell Energy INC | Danbury | CT | Computer and Electronic Product Manufacturing334413 | 100-499 | ● ACTIVE |
Garrett Printing & Graphics, INC. | Bristol | CT | Printing and Related Support Activities323111 | 1-19 | ● ACTIVE |
| GMGemco Manufacturing Company, INC | Southington | CT | Fabricated Metal Product Manufacturing332116 | — | ● ACTIVE |