| AMAllied Metal Finishing | South Windsor | CT | Fabricated Metal Product Manufacturing332813 | 1-19 | ◐ LIKELY ACTIVE |
| EWEast Windsor Metal Fabricating, INC. | South Windsor | CT | Fabricated Metal Product Manufacturing332312 | 1-19 | ◐ LIKELY ACTIVE |
| EPExperimental Prototype Products, INC. | South Windsor | CT | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| KPKeystone Paper & Box Company, INC. | South Windsor | CT | Paper Manufacturing322130 | 20-99 | ◐ LIKELY ACTIVE |
| TUTelefunken Usa, LLC | South Windsor | CT | Computer and Electronic Product Manufacturing334310 | 20-99 | ◐ LIKELY ACTIVE |
| AMAtlas Metal Works LLC | South Windsor | CT | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| HVHoya Vision Care | South Windsor | CT | Miscellaneous Manufacturing339115 | 20-99 | ◐ LIKELY ACTIVE |
| HHyAxiom | South Windsor | CT | Electrical Equipment, Appliance & Component Manufacturing335999 | 100-499 | ◐ LIKELY ACTIVE |
| MTMetals Testing CO | South Windsor | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| CCChemstation Connecticut | South Windsor | CT | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| CVConnecticut Valley Brewing Company | South Windsor | CT | Beverage and Tobacco Product Manufacturing312130 | 20-99 | ◐ LIKELY ACTIVE |
| EIElectro-methods, INC. | South Windsor | CT | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| GTGlobal Turbine Component Technologies, LLC | South Windsor | CT | Fabricated Metal Product Manufacturing332813 | — | ◐ LIKELY ACTIVE |
| NMNuway Microflake Partnership | South Windsor | CT | Beverage and Tobacco Product Manufacturing312229 | — | ◐ LIKELY ACTIVE |
| TBToce Brothers Performance, LLC | South Windsor | CT | Transportation Equipment Manufacturing336991 | — | ◐ LIKELY ACTIVE |
| ZSZoppa Studio, LLC | South Windsor | CT | Printing and Related Support Activities323113 | — | ◐ LIKELY ACTIVE |
REN Investment Group, Inc | South Windsor | CT | Machinery Manufacturing333999 | — | ◐ LIKELY ACTIVE |
| BHBlue Heron Vineyard at Foster Farm, LLC | South Windsor | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| BCBroadridge Customer Communications, LLC (2) | South Windsor | CT | Printing and Related Support Activities323111 | 500+ | ◐ LIKELY ACTIVE |
| GSG & S Scrap Metal | South Windsor | CT | Machinery Manufacturing333248 | 20-99 | ◐ LIKELY ACTIVE |
| HHHartford Hub | South Windsor | CT | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| HSHMF South Windsor | South Windsor | CT | Food Manufacturing311612 | 1-19 | ◐ LIKELY ACTIVE |
| OROld Route Two Spirits | South Windsor | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
Prime Materials Recovery, INC - South Windsor | South Windsor | CT | Machinery Manufacturing333248 | 1-19 | ◐ LIKELY ACTIVE |
| PLPrtc LLC | South Windsor | CT | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| PAPursuit Aerospace DBA Whitcraft South Windsor | South Windsor | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| TMTwin MRO | South Windsor | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |