| DIDoncasters INC Precision Castings New England | Groton | CT | Primary Metal Manufacturing331512 | 100-499 | ● ACTIVE |
| EBElectric Boat Company | Groton | CT | Transportation Equipment Manufacturing336611 | 500+ | ● ACTIVE |
| PBPoet Biorefining - Groton | Groton | SD | Food Manufacturing311119 | 20-99 | ● ACTIVE |
Insco CORP | Groton | MA | Machinery Manufacturing333612 | — | ● ACTIVE |
Thayermahan, INC | Groton | CT | Computer and Electronic Product Manufacturing334511 | 100-499 | ● ACTIVE |
L.b.i., INC. | Groton | CT | Transportation Equipment Manufacturing336611 | — | ● ACTIVE |
Papa Soap LLC | Groton | CT | Chemical Manufacturing325611 | — | ● ACTIVE |
Quartet Technology INC. | Groton | MA | Miscellaneous Manufacturing339113 | — | ● ACTIVE |
Youv LLC | Groton | MA | Chemical Manufacturing325620 | — | ● ACTIVE |
| HVHollingsworth & Vose | Groton | MA | Paper Manufacturing322120 | — | ◐ 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 |
| TCTilcon Ct Asphalt Stone Ready Mix | Groton | CT | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
Kongsberg Digital Simulation INC | Groton | CT | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
| CDC & D Assembly, INC. | Groton | NY | Computer and Electronic Product Manufacturing334418 | 20-99 | ◐ LIKELY ACTIVE |
| GSGroton Screw Machine CO | Groton | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ALApis LLC | Groton | VT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| AHAutumn Hills Orchard | Groton | MA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| CCtang1-yucn | Groton | CT | Transportation Equipment Manufacturing336411 | 20-99 | ◐ LIKELY ACTIVE |
| DWDark Waters Distillery | Groton | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| GRGolden Rule Brewing Company | Groton | VT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| HFHoward Farms | Groton | NY | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| ILIMIA, LLC Groton | Groton | CT | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| KAKhmer Angkor Vineyard | Groton | NY | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| THThe H R Hillery Company | Groton | CT | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| DWDark Waters Distillery LLC | Groton | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◇ UNVERIFIED |
| DLDutch's LLC | Groton | CT | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| PSPcc Structurals | Groton | CT | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| PIPfizer INC (formerly Pfizer Incorporated, Manufacturing and Research) | Groton | CT | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |