| TCThe Colt's Plastics Company, Inc. | Dayville | 20–99 | ◐ LIKELY ACTIVE |
| HTHi Tech Packaging INC | Stratford | — | ◇ UNVERIFIED |
| ILIntegro LLC | New Britain | — | ◇ UNVERIFIED |
| ATAcson Tool Co., INC. | Bridgeport | — | ◇ UNVERIFIED |
 Advanced Drainage Systems | Rocky Hill | — | ◇ UNVERIFIED |
| ASAdvanced Specialties, LLC | Watertown | — | ◇ UNVERIFIED |
| ASAptar Stratford | Stratford | — | ◇ UNVERIFIED |
| ACAtofina Chemicals INC Atoglas Div | Kensington | — | ◇ UNVERIFIED |
| CRCarlon Rubber Products CO | Derby | — | ◇ UNVERIFIED |
| CPConnecticut Plastics, INC. | Wallingford | — | ◇ UNVERIFIED |
| DRDelta Rubber CO Sub of Nn, INC | Danielson | — | ◇ UNVERIFIED |
| FBFirestone Building Products CO | Bristol | — | ◇ UNVERIFIED |
| FCFlexcon CO INC | North Branford | — | ◇ UNVERIFIED |
| GPGateway Plastics & Molding, INC. | Rocky Hill | — | ◇ UNVERIFIED |
| GMGirardin Moulding, INC | Windsor Locks | — | ◇ UNVERIFIED |
| HOHicks & Otis Prints INC | Norwalk | — | ◇ UNVERIFIED |
| IPIdentification Products | Shelton | — | ◇ UNVERIFIED |
| JLJ & L Plastic Molding, INC. | Wallingford | — | ◇ UNVERIFIED |
| LFLatex Foam International LLC | Shelton | — | ◇ UNVERIFIED |
| LFLatex Foam Intl | Shelton | — | ◇ UNVERIFIED |
| MMManchester Molding & Mfg. Co., INC. | Manchester | — | ◇ UNVERIFIED |
| MPMps Plastics, INC. | Marlborough | — | ◇ UNVERIFIED |
| NMNortheast Mold & Plastics | Glastonbury | — | ◇ UNVERIFIED |
| PCPhillips-moldex Company | Putnam | — | ◇ UNVERIFIED |
| PTPlastic Tool Systems, INC. | Milford | — | ◇ UNVERIFIED |
 Precision Engineering Laboratories | Branford | — | ◇ UNVERIFIED |
| RIRapid Industries Inc. | Essex | — | ◇ UNVERIFIED |
| RMRichard Montanari Jr. | North Haven | — | ◇ UNVERIFIED |
| RCRogers CORP Willimantic | South Windham | — | ◇ UNVERIFIED |
| RMRogers Manufacturing Company | Middlefield | — | ◇ UNVERIFIED |
| RRRoss & Roberts INC | Stratford | — | ◇ UNVERIFIED |
| SASealed Air CORP - Bethel | Bethel | — | ◇ UNVERIFIED |
| SPSonoco Protective Solutions, INC | Putnam | — | ◇ UNVERIFIED |
| SVSound View Plastics, LLC | Westbrook | — | ◇ UNVERIFIED |
| SLSouthpack, LLC | New Britain | — | ◇ UNVERIFIED |
| SLSpartech, LLC (former Polyone Designed Structures and Solutions) | Stamford | — | ◇ UNVERIFIED |
| SPSquare Products LLC | Sandy Hook | — | ◇ UNVERIFIED |
| SSSuper Seal Corporation | Stratford | — | ◇ UNVERIFIED |
| TITechmold Industries, INC. | North Haven | — | ◇ UNVERIFIED |
| TPTechnology Plastics, LLC | Terryville | — | ◇ UNVERIFIED |
 The Gilman Brothers Company | Gilman | — | ◇ UNVERIFIED |
| The Gilman Brothers Company | Bozrah | — | ◇ UNVERIFIED |
| TVTobacco Valley Retreading, LLC | Bloomfield | — | ◇ UNVERIFIED |
| WPWatertown Plastics, INC | Watertown | — | ◇ UNVERIFIED |
| WPWepco Plastics INC | Middlefield | — | ◇ UNVERIFIED |
