| ICInstron CORP | Norwood | — | ◇ UNVERIFIED |
| ICInstron Corporation | Canton | — | ◇ UNVERIFIED |
| MDMicrowave Development | Needham | — | ◇ UNVERIFIED |
| NANidec America Corporation | Canton | — | ◇ UNVERIFIED |
| PAPrecious Alloy Refining LLC | Stoughton | — | ◇ UNVERIFIED |
| RIRemtec INC Dba Tecmark | Norwood | — | ◇ UNVERIFIED |
| TPTeledyne Philbrick | Dedham | — | ◇ UNVERIFIED |
| TETyco Electronics | Norwood | — | ◇ UNVERIFIED |
| UUltra | Braintree | — | ◇ UNVERIFIED |
| UMUltra Maritime Naval Systems and Sensors | Quincy | — | ◇ UNVERIFIED |
| 1C109 Constitution Franklin MA | Franklin | 20–99 | ◐ LIKELY ACTIVE |
| CWCanton Warehouse | Canton | 1–19 | ◐ LIKELY ACTIVE |
| CAChasm Advanced Materials, Inc. - Canton | Canton | 1–19 | ◐ LIKELY ACTIVE |
| F5Franklin 50 | Franklin | 500+ | ◐ LIKELY ACTIVE |
| GDGeneral Dynamics Mission Systems, INC. | Dedham | — | ◐ LIKELY ACTIVE |
| HDHaystack Diagnostics, INC | Brookline | — | ◐ LIKELY ACTIVE |
| ITIllinois Tool Works INC | Norwood | — | ◐ LIKELY ACTIVE |
| KIKhoury Industries Incorporated | Bellingham | — | ◐ LIKELY ACTIVE |
| MAMa217 Ametek Programmable Power, INC. Dba Uei | Norwood | 20–99 | ◐ LIKELY ACTIVE |
| MDMicrowave Development Laboratories, INC. | Needham Heights | — | ◐ LIKELY ACTIVE |
| NRNational Resource Management INC | Canton | — | ◐ LIKELY ACTIVE |
| NMNorwood, MA. | Norwood | 20–99 | ◐ LIKELY ACTIVE |
| PTParallel Technologies, INC. | Randolph | — | ◐ LIKELY ACTIVE |
| PProdrive | Canton | 20–99 | ◐ LIKELY ACTIVE |
| SISaab, INC | Quincy | — | ◐ LIKELY ACTIVE |
| SISaab Inc. - Quincy | Quincy | 20–99 | ◐ LIKELY ACTIVE |
| SCSICK Canton | Canton | 20–99 | ◐ LIKELY ACTIVE |
| SRSJE- Randolph | Randolph | 20–99 | ◐ LIKELY ACTIVE |
| SESmrc Engineering INC | Sharon | — | ◐ LIKELY ACTIVE |
| UBUltra - Bay State Drive | Braintree | 100–499 | ◐ LIKELY ACTIVE |
| UBUltra - Bower Rd Extension | Quincy | 1–19 | ◐ LIKELY ACTIVE |
| UCUltra - Campanelli Drive | Braintree | 20–99 | ◐ LIKELY ACTIVE |
| ADAnalog Devices INC | Norwood | — | ◇ UNVERIFIED |
| ADAnalog Devices Incorporated | Norwood | — | ◇ UNVERIFIED |
| AIAnduril Industries | Quincy | — | ◇ UNVERIFIED |
| ABAstrea Bioseparations US INC | Canton | — | ◇ UNVERIFIED |
| BSBae Systems-ocean Systems | Braintree | — | ◇ UNVERIFIED |
| CBCanton Bronze Aluminum | Canton | — | ◇ UNVERIFIED |
| DEDesco Electronics INC | Plainville | — | ◇ UNVERIFIED |
| EMEmd Millipore CORP | Stoughton | — | ◇ UNVERIFIED |
| ELEssential Life Solutions LTD | Stoughton | — | ◇ UNVERIFIED |
| KCKla Corporation | Westwood | — | ◇ UNVERIFIED |
| PSPrecision Sensing Devices INC | Medfield | — | ◇ UNVERIFIED |
| PTProdrive Technologies | Canton | — | ◇ UNVERIFIED |
| RIRemtec INC | Norwood | — | ◇ UNVERIFIED |
| SMStart Management, Inc. | Stoughton | — | ◇ UNVERIFIED |
| TITdl Incorporated | Canton | — | ◇ UNVERIFIED |
| UEUltra Electronics Ocean Systems | Braintree | — | ◇ UNVERIFIED |
| UEUltra Electronics Ocean Systems INC | Quincy | — | ◇ UNVERIFIED |