| SSSpatial Surgical LLC | Shrewsbury | MA | Computer and Electronic Product Manufacturing334510 | — | ◐ LIKELY ACTIVE |
| SISpecs-tii INC | Mansfield | MA | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| SASpectra Analysis Instruments INC | Marlborough | MA | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| SISpeedgoat INC | Framingham | MA | Computer and Electronic Product Manufacturing334111 | — | ◐ LIKELY ACTIVE |
| STSteam Trap Systems LLC | Marblehead | MA | Computer and Electronic Product Manufacturing334519 | — | ◐ LIKELY ACTIVE |
| SISuperlogics Incorporated | Natick | MA | Computer and Electronic Product Manufacturing334111 | — | ◐ LIKELY ACTIVE |
| SMSureScan MA Corporation | Boxborough | MA | Computer and Electronic Product Manufacturing334517 | 20-99 | ◐ LIKELY ACTIVE |
| TLTbd Labs LLC | Framingham | MA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| TFTeledyne FLIR Billerica | North Billerica | MA | Computer and Electronic Product Manufacturing334413 | 100-499 | ◐ LIKELY ACTIVE |
| TFTeledyne Flir Defense, INC. | North Billerica | MA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| TFTeledyne Flir Unmanned Ground Systems, INC | Chelmsford | MA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| TQTeledyne Qioptiq Salem | Salem | MA | Computer and Electronic Product Manufacturing334511 | 20-99 | ◐ LIKELY ACTIVE |
| TITemp-pro Incorporated | Northampton | MA | Computer and Electronic Product Manufacturing334513 | — | ◐ LIKELY ACTIVE |
| TDTemptronic DBA InTEST Thermal Solutions | Mansfield | MA | Computer and Electronic Product Manufacturing334515 | 20-99 | ◐ LIKELY ACTIVE |
| TITeradio INC. | Newburyport | MA | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| TITeradyne, INC. | North Reading | MA | Computer and Electronic Product Manufacturing334515 | — | ◐ LIKELY ACTIVE |
| TCTMEA - Chelmsford | Chelmsford | MA | Computer and Electronic Product Manufacturing334413 | 20-99 | ◐ LIKELY ACTIVE |
| TPTransom Post OpCo, LLC dba Bose Professional | Hopkinton | MA | Computer and Electronic Product Manufacturing334310 | 100-499 | ◐ LIKELY ACTIVE |
| UBUltra - Bower Rd Extension | Quincy | MA | Computer and Electronic Product Manufacturing334511 | 1-19 | ◐ LIKELY ACTIVE |
| UCUltra - Campanelli Drive | Braintree | MA | Computer and Electronic Product Manufacturing334511 | 20-99 | ◐ LIKELY ACTIVE |
| ULUnisite, LLC | Boston | MA | Computer and Electronic Product Manufacturing334220 | — | ◐ LIKELY ACTIVE |
| VCVector Controls INC | Newton | MA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| VBViasat - Boston, MA | Boston | MA | Computer and Electronic Product Manufacturing334220 | 20-99 | ◐ LIKELY ACTIVE |
| VMViasat - Marlborough, MA | Marlborough | MA | Computer and Electronic Product Manufacturing334220 | 20-99 | ◐ LIKELY ACTIVE |
| VMVje Ma | Chelmsford | MA | Computer and Electronic Product Manufacturing334517 | 20-99 | ◐ LIKELY ACTIVE |
| WIWabtec Inspection Technologies, INC. | Waltham | MA | Computer and Electronic Product Manufacturing334419 | — | ◐ LIKELY ACTIVE |
| WMWaters- Milford | Milford | MA | Computer and Electronic Product Manufacturing334516 | 500+ | ◐ LIKELY ACTIVE |
| WTWaters Technologies Corporation | Milford | MA | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| WWestborough | Westborough | MA | Computer and Electronic Product Manufacturing334290 | 1-19 | ◐ LIKELY ACTIVE |
| WMWestford MA | Westford | MA | Computer and Electronic Product Manufacturing334515 | 20-99 | ◐ LIKELY ACTIVE |
| XCXcerra Corporation | Norwood | MA | Computer and Electronic Product Manufacturing334515 | — | ◐ LIKELY ACTIVE |
| XCXeresearch Corporation | Burlington | MA | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| CACase Assembly Solutions Incorporated | South Easton | MA | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| D2D 2 Incorporated | Buzzards Bay | MA | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| FCFourstar Connections INC | Hudson | MA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| 1B1cell Bio INC | Watertown | MA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| 3T3m Touch Systems (haverhill) | Haverhill | MA | Computer and Electronic Product Manufacturing334119 | — | ◇ UNVERIFIED |
| 4B495 Bc Investors LLC | Tewksbury | MA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| 9D908 Devices INC | Boston | MA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| ACAcacia Communications INC | Maynard | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ANAc Navigation | West Newton | MA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| AEAdvanced Electron Beams INC | Wilmington | MA | Computer and Electronic Product Manufacturing334517 | — | ◇ UNVERIFIED |
| ALAlkras LLC | Milford | MA | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| ASAlpha Szenszor Inc. | Burlington | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ATAlto Technologies Corporation | Sterling | MA | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| ASAmerican Superconductor | Westborough | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ADAnalog Devices INC | North Chelmsford | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ADAnalog Devices Incorporated | Norwood | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| AIAnduril Industries | Lexington | MA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| AIAnduril Industries | Quincy | MA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |