| NHNorth Haven, Ct Hexacomb | North Haven | CT | Paper Manufacturing322211 | 20-99 | ◐ LIKELY ACTIVE |
| NVNorthwinds Vineyard | Watertown | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| NLNotehavenus LLC | East Hartford | CT | Printing and Related Support Activities323111 | — | ◐ LIKELY ACTIVE |
| NFNoujaim's Food, LLC | Winsted | CT | Food Manufacturing311615 | — | ◐ LIKELY ACTIVE |
| NMNPI Medical (Westfall Technik, LLC) | Ansonia | CT | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| NMNumet Machining Tech | Orange | CT | Transportation Equipment Manufacturing336411 | 20-99 | ◐ LIKELY ACTIVE |
| NPNuovo Pasta Productions, Ltd. | Stratford | CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
Nutmeg Container Thompson | Thompson | CT | Wood Product Manufacturing321920 | 20-99 | ◐ LIKELY ACTIVE |
| OTOetiker Tool Corporation | Wallingford | CT | Fabricated Metal Product Manufacturing332216 | 20-99 | ◐ LIKELY ACTIVE |
| OAOFS Avon | Avon | CT | Electrical Equipment, Appliance & Component Manufacturing335921 | 100-499 | ◐ LIKELY ACTIVE |
| OROld Route Two Spirits | South Windsor | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| OBOmaha Beef Company Inc. | Danbury | CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| OEOmega Engineering - CT | Norwalk | CT | Computer and Electronic Product Manufacturing334513 | 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 |
| OEOtis Elevator Company | Farmington | CT | Machinery Manufacturing333921 | — | ◐ LIKELY ACTIVE |
| OOOx & Oak Vineyards | Lebanon | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PCPacific Coast Elevator CORP | Farmington | CT | Machinery Manufacturing333921 | — | ◐ LIKELY ACTIVE |
| PHParadise Hills Vineyard & Winery | Wallingford | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PMParker Medical | Danbury | CT | Computer and Electronic Product Manufacturing334517 | 20-99 | ◐ LIKELY ACTIVE |
| PEPassionfruit Estate, LLC | Stonington | 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 |
| PBPhantom Brewing Company | Higganum | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ 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 |
| PGPlug Group | Westbrook | CT | Fabricated Metal Product Manufacturing332911 | 20-99 | ◐ LIKELY ACTIVE |
Polamer Precision Inc - Blg 2 | Newington | CT | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| PJPolly & Joan's Cordial CO. LLC | Wallingford | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| PDPomaski, Don | Collinsville | CT | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| PFPortland Foods INC | Bristol | CT | Food Manufacturing311999 | — | ◐ LIKELY ACTIVE |
| PSPowdermen Spirits Company LLC | Windsor | CT | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| PPPPC Putnam | Putnam | CT | Electrical Equipment, Appliance & Component Manufacturing335921 | 20-99 | ◐ LIKELY ACTIVE |
| PMPp Middletown Holdings, LLC | Middletown | CT | Fabricated Metal Product Manufacturing332993 | — | ◐ LIKELY ACTIVE |
| PWPratt & Whitney East Hartford | East Hartford | CT | Transportation Equipment Manufacturing336412 | 500+ | ◐ LIKELY ACTIVE |
| PWPratt & Whitney Middletown | Middletown | CT | Transportation Equipment Manufacturing336412 | 500+ | ◐ LIKELY ACTIVE |
| PSPrecision Sensors | Milford | CT | Computer and Electronic Product Manufacturing334513 | 100-499 | ◐ LIKELY ACTIVE |
Prime Materials Recovery, INC - South Windsor | South Windsor | CT | Machinery Manufacturing333248 | 1-19 | ◐ LIKELY ACTIVE |
| PBPrimo Brands - Watertown Factory | Watertown | CT | Beverage and Tobacco Product Manufacturing312112 | 20-99 | ◐ LIKELY ACTIVE |
| PPProdigy Power LLC | Coventry | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| PCProduction Court | New Britain | CT | Chemical Manufacturing325612 | 1-19 | ◐ LIKELY ACTIVE |
| PLProiron, L.l.c. | West Haven | CT | Fabricated Metal Product Manufacturing332323 | — | ◐ LIKELY ACTIVE |
| PLPrtc LLC | South Windsor | CT | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| PPPTA Plastics Oxford | Oxford | CT | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| PAPursuit Aerospace DBA Whitcraft South Windsor | South Windsor | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| PAPursuit Aerospace - Manchester | Manchester | CT | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| QLQuantum Leap Medical Technologies INC. | Riverside | CT | Miscellaneous Manufacturing339113 | — | ◐ LIKELY ACTIVE |
| QCQuiet Corner Winery | Hampton | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RFRagozzino Foods, Inc. | Meriden | CT | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |