| MMMcGuire Manufacturing Co., Inc | Chesire | 1–19 | ◐ LIKELY ACTIVE |
| MEMorin East | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| PTPetit Tool Company | Thomaston | — | ◐ LIKELY ACTIVE |
| RBRoller Bearing CO of America, INC | Middlebury | — | ◐ LIKELY ACTIVE |
| SPSheldon Precision, LLC | Prospect | — | ◐ LIKELY ACTIVE |
| SDSilgan Dispensing Systems Covit America Corporation, DBA Silgan Aluminum Solutions (Seemar) | Watertown | 20–99 | ◐ LIKELY ACTIVE |
| SDSilgan Dispensing Systems Covit America Corporation, DBA Silgan Aluminum Solutions (Waterbury) | Waterbury | 20–99 | ◐ LIKELY ACTIVE |
| SISorge Industries, INC. | Shelton | — | ◐ LIKELY ACTIVE |
Springfield Spring Corporation - CT | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| SSsc-ct | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| SMSsi Manufacturing Technologies CORP. | Bristol | — | ◐ LIKELY ACTIVE |
| SMSSI Mfg | Bristol | 20–99 | ◐ LIKELY ACTIVE |
| SEStewart EFI CT Warehouse | Thomaston | 1–19 | ◐ LIKELY ACTIVE |
| TATis Ansonia, LLC | Ansonia | — | ◐ LIKELY ACTIVE |
| UNUniMetal Naugatuck | Naugatuck | 20–99 | ◐ LIKELY ACTIVE |
| UTUniMetal Thomaston | Thomaston | 20–99 | ◐ LIKELY ACTIVE |
| WPWaterbury - PC | Middlebury | 1–19 | ◐ LIKELY ACTIVE |
| AHAnytime Hydraulics, LLC | Waterbury | — | ◐ LIKELY ACTIVE |
| SMSsi Manufacturing Technologies CORP. | Bristol | — | ◇ UNVERIFIED |
| AHA-1 Heat Treating, Inc. | Ansonia | — | ◇ UNVERIFIED |
| AHABT Holdings, LLC | Bristol | — | ◇ UNVERIFIED |
| AWAlloy Welding | Bristol | — | ◇ UNVERIFIED |
| AHArtisan Hand Tools, Inc. | Ansonia | — | ◇ UNVERIFIED |
| AMAtlantic Manufacturing, INC. | Thomaston | — | ◇ UNVERIFIED |
| APAutoswage Prods INC | Shelton | — | ◇ UNVERIFIED |
| BYBaron & Young Company, INC. | Bristol | — | ◇ UNVERIFIED |
Braxton Manufacturing Company, INC. | Watertown | — | ◇ UNVERIFIED |
| BTBristol Tool and Die Company, INC. | Bristol | — | ◇ UNVERIFIED |
| CECfd Engineering Company, INC. | Prospect | — | ◇ UNVERIFIED |
| CPChromium Process CO | Shelton | — | ◇ UNVERIFIED |
| CMC & M Screw Machine Products, INC. | Bristol | — | ◇ UNVERIFIED |
| DMDanjon Manufacturing Corporation | Cheshire | — | ◇ UNVERIFIED |
| DWDasco Welded Products, INC. | Waterbury | — | ◇ UNVERIFIED |
| DIDi-cor Industries, INC. | Bristol | — | ◇ UNVERIFIED |
| DMDurco Manfacturing CO. INC | Waterbury | — | ◇ UNVERIFIED |
| EME.s. Metal Fabrications, INC. | Terryville | — | ◇ UNVERIFIED |
| EBEtherington Brothers | Bristol | — | ◇ UNVERIFIED |
| ECExmet CORP | Naugatuck | — | ◇ UNVERIFIED |
| EDEyelet Design, INC | Waterbury | — | ◇ UNVERIFIED |
| ELEz4x4, LLC | Waterbury | — | ◇ UNVERIFIED |
| FSFairfield Steel Works LLC | Shelton | — | ◇ UNVERIFIED |
| FSFjc Services LLC | Plymouth | — | ◇ UNVERIFIED |
| FSFour Star Manufacturing Company | Bristol | — | ◇ UNVERIFIED |
| GLG L C Associates | Thomaston | — | ◇ UNVERIFIED |
| GMGreer Manufacturing, INC. | Prospect | — | ◇ UNVERIFIED |
| ISImperial Spring Manfuacturing, LLC | Bristol | — | ◇ UNVERIFIED |
| IMIndependent Metalworx, Inc. | Ansonia | — | ◇ UNVERIFIED |
| IMIndependent Metalworx, Inc. | Ansonia | — | ◇ UNVERIFIED |
| IHInfinity Holdings Company LLC | Terryville | — | ◇ UNVERIFIED |
| ISInfinity Stone, INC. | Waterbury | — | ◇ UNVERIFIED |