Photronics INC | Brookfield | 100–499 | ● ACTIVE |
Ab Electronics LLC | Danbury | — | ● ACTIVE |
Advanced Fusion Systems, LLC | Newtown | — | ● ACTIVE |
| DNDrs Naval Power Systems INC | Danbury | 100–499 | ● ACTIVE |
Elidah INC | Newtown | — | ● ACTIVE |
Ens Microwave, LLC | Danbury | — | ● ACTIVE |
Hoffman Engineering, LLC | Stamford | — | ● ACTIVE |
3dconnexion INC. | Norwalk | — | ● ACTIVE |
Amphenol Corporation | Stamford | — | ● ACTIVE |
Biowave Corporation | Westport | — | ● ACTIVE |
Delcom Products INC. | Danbury | — | ● ACTIVE |
| EAEaton Aerospace LLC | Bethel | 100–499 | ● ACTIVE |
Hamar Laser Instruments, INC. | Danbury | — | ● ACTIVE |
| KIKimchuk, Incorporated | Danbury | — | ● ACTIVE |
Mercury Scientific INC. | Newtown | — | ● ACTIVE |
Navigtr INC | Old Greenwich | — | ● ACTIVE |
Owl Cyber Defense Solutions, LLC | Danbury | — | ● ACTIVE |
Owlstone INC. | Darien | — | ● ACTIVE |
Pmc-sts INC | Danbury | — | ● ACTIVE |
Qsonica LLC | Newtown | — | ● ACTIVE |
Sonics & Materials INC | Newtown | — | ● ACTIVE |
Vista Group International, INC | Darien | — | ● ACTIVE |
Weigh & Test Systems, INC. | Riverside | — | ● ACTIVE |
| XTXcaliber Technologies INC. | Norwalk | — | ● ACTIVE |
| FEFuelcell Energy INC | Danbury | 100–499 | ◐ LIKELY ACTIVE |
Glacier Computer LLC | New Milford | — | ◐ LIKELY ACTIVE |
Conoptics INC | Danbury | — | ◐ LIKELY ACTIVE |
| ACAmphenol Corporation | Danbury | — | ◐ LIKELY ACTIVE |
| ANAmphenol Nexus Technologies, INC. | Stamford | 20–99 | ◐ LIKELY ACTIVE |
| IEImperial Electronic Assembly, INC. | Brookfield | 100–499 | ◐ LIKELY ACTIVE |
| BABelimo Aircontrols | Danbury | — | ◇ UNVERIFIED |
| NCNorwalk Center LLC | Norwalk | — | ◇ UNVERIFIED |
| PEPerkin Elmer Chrom Division | Norwalk | — | ◇ UNVERIFIED |
| TCTwenty-five Commerce INC Dba Crystal Ice | Norwalk | — | ◇ UNVERIFIED |
| 9D908 Danbury | Danbury | 20–99 | ◐ LIKELY ACTIVE |
| AAAragra - AB Electronics LLC | Brookfield | 20–99 | ◐ LIKELY ACTIVE |
| BBrookfield | Brookfield | 100–499 | ◐ LIKELY ACTIVE |
| OEOmega Engineering - CT | Norwalk | 20–99 | ◐ LIKELY ACTIVE |
| OEOmega Engineering, INC. | Norwalk | — | ◐ LIKELY ACTIVE |
| PMParker Medical | Danbury | 20–99 | ◐ LIKELY ACTIVE |
| SSSine Strategic Group, INC. | Cos Cob | — | ◐ LIKELY ACTIVE |
| ABArista Beaver Brook Circuits INC | Bethel | — | ◇ UNVERIFIED |
| BLBurndy, LLC | Bethel | — | ◇ UNVERIFIED |
| CCuriomatic .LLC | New Fairfield | — | ◇ UNVERIFIED |
| HHologic | Danbury | — | ◇ UNVERIFIED |
| IAIntelligent Audio Products INC. | Westport | — | ◇ UNVERIFIED |
| MSMorristown Star Struck, LLC | Bethel | — | ◇ UNVERIFIED |
| PEPmc Engineering, LLC | Danbury | — | ◇ UNVERIFIED |
| SASealed Air CORP - Bethel | Bethel | — | ◇ UNVERIFIED |
| TITeknicircuits INC | Danbury | — | ◇ UNVERIFIED |