| MSMetalizing Service CO | Elmwood | CT | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| NENalas Engineering Services LLC | Centerbrook | CT | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| OIO&g Industries Southbury Quarry | Southbury | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| OIOldcastle Infrastructure | Avon | CT | Nonmetallic Mineral Product Manufacturing327331 | — | ◐ LIKELY ACTIVE |
| OROldcastle Retail INC (dba Bonsal American) | Canaan | CT | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| OEOtis Elevator Service Center | Bloomfield | CT | Machinery Manufacturing333921 | — | ◐ LIKELY ACTIVE |
| PMParadigm Manchester INC | Manchester | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| PTPerma Treat CORP | Durham | CT | Wood Product Manufacturing321114 | — | ◐ LIKELY ACTIVE |
| PDPlastic Diversity Solutions | Dayville | CT | Chemical Manufacturing325991 | — | ◐ LIKELY ACTIVE |
| PTPurification Techs INC | Chester | CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| RSResin Solutions, LLC | Stratford | CT | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| SMSchick Manufacturing, INC. | Milford | CT | Fabricated Metal Product Manufacturing332211 | — | ◐ LIKELY ACTIVE |
| SDSchneider-square D Field Service | East Haven | CT | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◐ LIKELY ACTIVE |
| SSSeymour's Sand & Stone, INC | Bozrah | CT | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| SMSpecialty Minerals Dolomite Plant | Canaan | CT | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| TPTect Power | Newington | CT | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| TJThe J.j. Ryan Corporation Rex Forge Division | Plantsville | CT | Fabricated Metal Product Manufacturing332111 | 20-99 | ◐ LIKELY ACTIVE |
| TCTilcon Connecticut | Manchester | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TCTilcon Connecticut Aggregate & Asphalt | Newington | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TCTilcon Connecticut - Hamden Plant | Hamden | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TCTilcon Connecticut, INC | New Britain | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TCTilcon Connecticut, INC. | North Branford | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TCTilcon Connecticut - Waterbury Plant | Waterbury | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TCTilcon Crushed Stone Asphalt | Wallingford | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TCTilcon Ct Asphalt Stone Ready Mix | Groton | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| THTilcon Hot Mix Asphalt | Danbury | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TNTilcon - Newtown Plant | Newtown | CT | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| TSTorrey S Crane Company | Southington (plantsville) | CT | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| TPTtm Printed Circuit Group, INC. | Stafford | CT | Computer and Electronic Product Manufacturing334412 | — | ◐ LIKELY ACTIVE |
Ttm Technologies | Stafford | CT | Computer and Electronic Product Manufacturing334418 | — | ◐ LIKELY ACTIVE |
| AHA-1 Heat Treating, Inc. | Ansonia | CT | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| ATAbstract Tool, INC. | Deep River | CT | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| AAccutron | Windsor | CT | Computer and Electronic Product Manufacturing334418 | 20-99 | ◐ LIKELY ACTIVE |
| ATAcson Tool Co., INC. | Bridgeport | CT | Plastics and Rubber Products Manufacturing326199 | 1-19 | ◐ LIKELY ACTIVE |
| APAdvanced Photonics International, INC. | Fairfield | CT | Nonmetallic Mineral Product Manufacturing327215 | — | ◐ LIKELY ACTIVE |
| ALAeroswiss LLC | Meriden | CT | Fabricated Metal Product Manufacturing332721 | 20-99 | ◐ LIKELY ACTIVE |
| AIAlvarez Industries LLC | Orange | CT | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
Ammecs CO L.l.c | Bridgeport | CT | Food Manufacturing311991 | — | ◐ LIKELY ACTIVE |
| ANAquila's Nest Vineyards, LLC | Sandy Hook | CT | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| AIArdent, INC. | East Hartford | CT | Miscellaneous Manufacturing339999 | 20-99 | ◐ LIKELY ACTIVE |
| ACArrow Concrete | Granby | CT | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
Bagela Usa, LLC | Shelton | CT | Machinery Manufacturing333120 | — | ◐ LIKELY ACTIVE |
| BBBakery Bread From Heaven II, LLC | Waterbury | CT | Food Manufacturing311811 | 1-19 | ◐ LIKELY ACTIVE |
| BUBelimo U.s. INC. | Danbury | CT | Computer and Electronic Product Manufacturing334512 | 500+ | ◐ LIKELY ACTIVE |
| BHBergen House | Middletown | CT | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
Bioxcel Therapeutics, INC. | New Haven | CT | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BABlack and White Enterprises LLC | Windsor Locks | CT | Printing and Related Support Activities323113 | 1-19 | ◐ LIKELY ACTIVE |
| BOBlastech Overhaul and Repair CORP | Bloomfield | CT | Machinery Manufacturing333611 | 1-19 | ◐ LIKELY ACTIVE |
Blue Thunder Technologies, LLC | Enfield | CT | Apparel Manufacturing315990 | — | ◐ LIKELY ACTIVE |
| BLBrand-nu Laboratories | Meriden | CT | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |