| DIDoncasters INC Precision Castings New England | Groton, CT | Primary Metal Manufacturing331512 | 100–499 | ● ACTIVE |
| EBElectric Boat Company | Groton, CT | Transportation Equipment Manufacturing336611 | 500+ | ● ACTIVE |
Seconn Fabrication LLC | Waterford, CT | Fabricated Metal Product Manufacturing332322 | 20–99 | ● ACTIVE |
Sheffield Pharmaceuticals, LLC | New London, CT | Chemical Manufacturing325412 | — | ● ACTIVE |
901 D, LLC | New London, CT | Fabricated Metal Product Manufacturing332999 | 1–19 | ● ACTIVE |
Alpha Q, INC. | Colchester, CT | Fabricated Metal Product Manufacturing332710 | 100–499 | ● ACTIVE |
Embalmers' Supply Company, the | East Lyme, CT | Chemical Manufacturing325998 | — | ● ACTIVE |
International Cordage East, Limited | Colchester, CT | Textile Product Mills314994 | 100–499 | ● ACTIVE |
Lehvoss North America INC. | Pawcatuck, CT | Plastics and Rubber Products Manufacturing326199 | 20–99 | ● ACTIVE |
| MXMedtronic Xomed | Mystic, CT | Miscellaneous Manufacturing339113 | 20–99 | ● ACTIVE |
Micro Precision, LLC | South Windham, CT | Fabricated Metal Product Manufacturing332721 | 20–99 | ● ACTIVE |
Nalas Engineering Services, LLC | Norwich, CT | Chemical Manufacturing325199 | — | ● ACTIVE |
N.c.t., INC. | Colchester, CT | Fabricated Metal Product Manufacturing332710 | — | ● ACTIVE |
| TSThames Shipyard & Repair Company the | New London, CT | Transportation Equipment Manufacturing336611 | 20–99 | ● ACTIVE |
Thayermahan, INC | Groton, CT | Computer and Electronic Product Manufacturing334511 | 100–499 | ● ACTIVE |
B. Hepworth and Co., LTD. of Connecticut, INC. | Mystic, CT | Transportation Equipment Manufacturing336320 | — | ● ACTIVE |
| CCCarwild Corporation | New London, CT | Miscellaneous Manufacturing339113 | 20–99 | ● ACTIVE |
Essential Trading Systems CORP | Colchester, CT | Computer and Electronic Product Manufacturing334290 | — | ● ACTIVE |
Gilman Corporation the | Gilman, CT | Plastics and Rubber Products Manufacturing326199 | — | ● ACTIVE |
Godman Energy Group, INC. | East Lyme, CT | Machinery Manufacturing333611 | — | ● ACTIVE |
Hanger Prosthetics & Orthotics, INC. | New London, CT | Miscellaneous Manufacturing339113 | — | ● ACTIVE |
Jammar Mfg. CO. INC. | Niantic, CT | Miscellaneous Manufacturing339920 | — | ● ACTIVE |
J. Steele Services LLC | Mystic, CT | Miscellaneous Manufacturing339999 | — | ● ACTIVE |
L.b.i., INC. | Groton, CT | Transportation Equipment Manufacturing336611 | — | ● ACTIVE |
| LLLifepharms LLC | New London, CT | Chemical Manufacturing325414 | — | ● ACTIVE |
Mystic Coffee LLC | Waterford, CT | Food Manufacturing311920 | — | ● ACTIVE |
Papa Soap LLC | Groton, CT | Chemical Manufacturing325611 | — | ● ACTIVE |
| PCPrysmian Cables and Systems Usa, LLC | Willimantic, CT | Electrical Equipment, Appliance & Component Manufacturing335929 | 100–499 | ● ACTIVE |
Sgl Automation, LLC | Waterford, CT | Machinery Manufacturing333248 | — | ● ACTIVE |
| SLS L Huntington CO | Stonington, CT | Miscellaneous Manufacturing339992 | — | ● ACTIVE |
Sun Turtle, LLC | New London, CT | Furniture and Related Product Manufacturing337214 | — | ● ACTIVE |
Tectonic Technologies LLC | Salem, CT | Computer and Electronic Product Manufacturing334519 | — | ● ACTIVE |
The Cooper Group, LLC | Pawcatuck, CT | Wood Product Manufacturing321911 | — | ● ACTIVE |
| BCBuilders Concrete East | Windham, CT | Nonmetallic Mineral Product Manufacturing327320 | 20–99 | ◐ LIKELY ACTIVE |
| DCDavis-standard CORP | Pawcatuck, CT | Plastics and Rubber Products Manufacturing326199 | 100–499 | ◐ LIKELY ACTIVE |
| BMBirk Manufacturing, INC. | East Lyme, CT | Computer and Electronic Product Manufacturing334419 | 100–499 | ◐ LIKELY ACTIVE |
| USUnified Sports, INC | Waterford, CT | Fabricated Metal Product Manufacturing332999 | 100–499 | ◐ LIKELY ACTIVE |
| UAUnited Abrasives INC | Willimantic, CT | Nonmetallic Mineral Product Manufacturing327910 | — | ◐ LIKELY ACTIVE |
| UNU.s. Naval Submarine Base New London (subasenlon) | Groton, CT | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| WIWyman-gordon Investment Castings, Incorporated | Groton, CT | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| ASAmericas Styrenics Allyns Point Plant | Gales Ferry, CT | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| GCGeneral Cable | Willimantic, CT | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| TCTilcon Ct Asphalt Stone Ready Mix | Groton, CT | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| APAmgraph Packaging, Inc. | Baltic, CT | Paper Manufacturing322220 | 100–499 | ◐ LIKELY ACTIVE |
| AMArchitectural Metals LLC | Mystic, CT | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
Kongsberg Digital Simulation INC | Groton, CT | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
Powered Armor Technologies LLC | Norwich, CT | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◐ LIKELY ACTIVE |
Sheffield Pharmaceuticals, LLC | Norwich, CT | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| YTYardney Technical Products, INC. | Pawcatuck, CT | Electrical Equipment, Appliance & Component Manufacturing335911 | — | ◇ UNVERIFIED |
| ASAmericas Styrenics Polystyrene Plant | Ledyard (gales Ferry), CT | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |