| USUnimetal Surface Finishing, LLC | Thomaston | — | ◐ LIKELY ACTIVE |
| AEAccellent Endoscopy | Watertown | — | ◇ UNVERIFIED |
| ECEyelet Crafters INC | Waterbury | — | ◇ UNVERIFIED |
| PMProspect Machine Products, INC | Prospect | — | ◇ UNVERIFIED |
| WSWaterbury Screw Machine Products | Waterbury | — | ◇ UNVERIFIED |
| HEHoward Engineering CO | Naugatuck | 1–19 | ◐ LIKELY ACTIVE |
| NHNelson Heat Treating Co, INC | Waterbury | — | ◇ UNVERIFIED |
| AOArmoloy of Ct, INC. | Bristol | — | ◐ LIKELY ACTIVE |
| AMArrow Manufacturing | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| GAGen-el-mec Associates, LLC | Oxford | — | ◐ LIKELY ACTIVE |
| IIIda International, INC. | Derby | 1–19 | ◐ LIKELY ACTIVE |
| NINeoperl INC | Waterbury | 20–99 | ◐ LIKELY ACTIVE |
| NPNovo Precision, LLC | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| NMNylo Metal Finishing LLC | Waterbury | — | ◐ LIKELY ACTIVE |
| SCStevens CO INC | Thomaston | 20–99 | ◐ LIKELY ACTIVE |
| TSTollman Spring Company, INC. | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| MEMark Eyelet | Watertown | — | ◐ LIKELY ACTIVE |
| SMScott's Metal Finishing LLC | Bristol | — | ◐ LIKELY ACTIVE |
| SISeidel, INC. | Waterbury | — | ◐ LIKELY ACTIVE |
| AIAccel International Holdings, INC. | Cheshire | — | ◇ UNVERIFIED |
| ARAcme Rivet & Machine CORP | Bristol | — | ◇ UNVERIFIED |
| ATArch Treatment Products (biocides) | Cheshire | — | ◇ UNVERIFIED |
| BGBarnes Group, INC. | Bristol | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Waterbury | — | ◇ UNVERIFIED |
| CCClear & Colored Coatings LLC | Wolcott | — | ◇ UNVERIFIED |
| DIDevivo Industries INC. | Waterbury | — | ◇ UNVERIFIED |
| EMEyelematic Manufacturing | Watertown | — | ◇ UNVERIFIED |
| FSFjc Services LLC | Terryville | — | ◇ UNVERIFIED |
| HMHenlopen Manufacturing Company, INC. | Watertown | — | ◇ UNVERIFIED |
| IHItw Highland Mfg CO | Waterbury | — | ◇ UNVERIFIED |
| MIMarjan INC | Waterbury | — | ◇ UNVERIFIED |
| MIMicrobest INC | Waterbury | — | ◇ UNVERIFIED |
Modern Metal Finishing INC | Naugatuck | — | ◇ UNVERIFIED |
| PIPhilson, INC. | Watertown | — | ◇ UNVERIFIED |
| RIRisdon-ams (usa) INC | Naugatuck | — | ◇ UNVERIFIED |
| RMRomatic Manufacturing Company | Southbury | — | ◇ UNVERIFIED |
| TCTimex CORP | Middlebury | — | ◇ UNVERIFIED |
| 4A411 Austin Road | Waterbury | 20–99 | ◐ LIKELY ACTIVE |
| CDClarkWestern Dietrich Building Systems - Bristol, CT | Bristol | 100–499 | ◐ LIKELY ACTIVE |
| CTConcentric Tool and Manufacturing Company | Naugatuck | 20–99 | ◐ LIKELY ACTIVE |
| CIConsolidated Industries | Cheshire | 20–99 | ◐ LIKELY ACTIVE |
| CPCurtis Products LLC | Bristol | 1–19 | ◐ LIKELY ACTIVE |
| DMDACRUZ Manufacturing, Inc. | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| DMDawid Manufacturing INC | Ansonia | — | ◐ LIKELY ACTIVE |
DVM Manufacturing, LLC - Naugatuck | Naugatuck | 1–19 | ◐ LIKELY ACTIVE |
| FSFourslide Spring and Stamping, Inc. | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| HPHartford Precision Products dba Waterbury Swiss Automatics | Waterbury | 1–19 | ◐ LIKELY ACTIVE |
| JEJea Enterprises, INC. | Middlebury | — | ◐ LIKELY ACTIVE |
| LSLee Spring Company Bristol CT | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| MOMan of Steel Welding Services LLC | Seymour | — | ◐ LIKELY ACTIVE |