| NENew England Asphalt Services LLC | Northford, CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| NENew England Cider Company | Wallingford, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| NMNoack's Meat Products, Inc. | Meriden, CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| NHNorth Haven | North Haven, CT | Chemical Manufacturing325120 | 20–99 | ◐ LIKELY ACTIVE |
| NHNorth Haven, Ct Hexacomb | North Haven, CT | Paper Manufacturing322211 | 20–99 | ◐ LIKELY ACTIVE |
| NANumet Acquisition Numet, INC. | Orange, CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| NMNumet Machining Tech | Orange, CT | Transportation Equipment Manufacturing336411 | 20–99 | ◐ LIKELY ACTIVE |
| OTOetiker Tool Corporation | Wallingford, CT | Fabricated Metal Product Manufacturing332216 | 20–99 | ◐ LIKELY ACTIVE |
 ORAFOL Americas Inc. | Wallingford, CT | Plastics and Rubber Products Manufacturing326113 | 100–499 | ◐ LIKELY ACTIVE |
| OIOSDA Inc | Milford, CT | Computer and Electronic Product Manufacturing334418 | 20–99 | ◐ LIKELY ACTIVE |
| PHParadise Hills Vineyard & Winery | Wallingford, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PRPerkins Rouge & Paint Co., LLC | Milford, CT | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| PPfc-ct | Woodbridge, CT | Plastics and Rubber Products Manufacturing326199 | 20–99 | ◐ LIKELY ACTIVE |
| PFPikalo Foods, LLC | New Haven, CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| P1Plant 1 | Hamden, CT | Chemical Manufacturing325510 | 1–19 | ◐ LIKELY ACTIVE |
| P1Plant 1 | New Haven, CT | Chemical Manufacturing325199 | 20–99 | ◐ LIKELY ACTIVE |
| P2Plant 2 | Hamden, CT | Chemical Manufacturing325510 | 20–99 | ◐ LIKELY ACTIVE |
| PJPolly & Joan's Cordial CO. LLC | Wallingford, CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| PPPorobond Products, LLC | Hamden, CT | Fabricated Metal Product Manufacturing332410 | — | ◐ LIKELY ACTIVE |
| PSPrecision Sensors | Milford, CT | Computer and Electronic Product Manufacturing334513 | 100–499 | ◐ LIKELY ACTIVE |
| PLProiron, L.l.c. | West Haven, CT | Fabricated Metal Product Manufacturing332323 | — | ◐ LIKELY ACTIVE |
| RFRagozzino Foods, Inc. | Meriden, CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| RERing's End Custom Millwork Division | Milford, CT | Furniture and Related Product Manufacturing337212 | 1–19 | ◐ LIKELY ACTIVE |
| RIRnaconnect, INC. | Branford, CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| RVRose Vineyards LLC | North Branford, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SVSavino Vineyards | Woodbridge, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SESchneider Electric EcoFit North Haven | North Haven, CT | Electrical Equipment, Appliance & Component Manufacturing335313 | 20–99 | ◐ LIKELY ACTIVE |
| SESeraph Energy, INC. | Milford, CT | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| SLShort Load Concrete 2 LLC | Milford, CT | Nonmetallic Mineral Product Manufacturing327310 | — | ▲ REPORTED CLOSED |
| SMShow Motion, INC. | Milford, CT | Furniture and Related Product Manufacturing337110 | 20–99 | ◐ LIKELY ACTIVE |
| SASikorsky Aircraft CORP | North Haven, CT | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| SBSmall Batch Cellars, LLC | North Haven, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| S1Spectrum 183 | Milford, CT | Transportation Equipment Manufacturing336413 | 20–99 | ◐ LIKELY ACTIVE |
| S4Spectrum 440 | Milford, CT | Transportation Equipment Manufacturing336413 | 1–19 | ◐ LIKELY ACTIVE |
| SASpectrum Associates, INC. | Milford, CT | Computer and Electronic Product Manufacturing334419 | — | ◐ LIKELY ACTIVE |
| SVStappa Vineyard | Orange, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SMSterling Medical LLC | Milford, CT | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| SFSunshine Farm Distillery | Wallingford, CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| TGTechnical Gas Products, INC. | Wallingford, CT | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| TCThermatool Corp | East Haven, CT | Machinery Manufacturing333992 | 20–99 | ◐ LIKELY ACTIVE |
| TSThe Southern Connecticut Wine Company LLC | Wallingford, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| TAThinklogical, A Belden Brand | Milford, CT | Computer and Electronic Product Manufacturing334418 | 20–99 | ◐ LIKELY ACTIVE |
| TSTibidabo Scientific Industries (usa), INC. | Madison, CT | Computer and Electronic Product Manufacturing334419 | — | ◐ LIKELY ACTIVE |
| TFTotal Fence LLC | New Haven, CT | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| TWTrack65 Wines | Wallingford, CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| T8Triple 8 Steel LLC | Milford, CT | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| TRTri-state Renewable Resources LLC | New Haven, CT | Printing and Related Support Activities323111 | — | ◐ LIKELY ACTIVE |
| UPUniversal Pure, LLC | Meriden, CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| VBVenice Bakery | Hamden, CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| VVjct | East Haven, CT | Computer and Electronic Product Manufacturing334517 | 1–19 | ◐ LIKELY ACTIVE |
