| AEAvaya Enterprise Communications Systems | Billerica | — | ◇ UNVERIFIED |
| BSBay State Circuits | Millbury | — | ◇ UNVERIFIED |
| BBionostics | Ayer | — | ◇ UNVERIFIED |
| BCBose CORP | Framingham | — | ◇ UNVERIFIED |
 Boston Scientific Corporation | Watertown | — | ◇ UNVERIFIED |
| BEBrookfield Engineering Laboratories INC | Middleborough | — | ◇ UNVERIFIED |
| BHBull Hn Information Systems INC | Brighton | — | ◇ UNVERIFIED |
| CDCampanelli Development LLC | Boxborough | — | ◇ UNVERIFIED |
| CCCgi Circuits | Taunton | — | ◇ UNVERIFIED |
| CCChelsea Clock Company | Chelsea | — | ◇ UNVERIFIED |
| CBCircuit Board Express | Haverhill | — | ◇ UNVERIFIED |
| CTCircuit Test Incorporated | Haverhill | — | ◇ UNVERIFIED |
| CSCisco Systems INC | Boxborough | — | ◇ UNVERIFIED |
| CCC&k Components | Newton | — | ◇ UNVERIFIED |
| CDCobham Defense Electronics Systems | Lowell | — | ◇ UNVERIFIED |
| CCCodex CORP | Mansfield | — | ◇ UNVERIFIED |
| CSCommonwealth Sprague Capacitor Incorporated | N Adams | — | ◇ UNVERIFIED |
| CCCopley Controls | Canton | — | ◇ UNVERIFIED |
| CBCoppola Bus CO. | Haverhill | — | ◇ UNVERIFIED |
| CICorning Intellisense | Wilmington | — | ◇ UNVERIFIED |
| CICpc Incorporated | Randolph | — | ◇ UNVERIFIED |
| CWCurtiss Wright Controls | Littleton | — | ◇ UNVERIFIED |
| CCCurtiss-wright Controls Embedded Computing | Littleton | — | ◇ UNVERIFIED |
| D1Digital 128 First Avenue LLC | Needham | — | ◇ UNVERIFIED |
| DEDigital Equipment | Westfield | — | ◇ UNVERIFIED |
| DEDigital Equipment Company | Hudson | — | ◇ UNVERIFIED |
| DEDigital Equipment Corporation | Acton | — | ◇ UNVERIFIED |
 Doble Engineering Company | Watertown | — | ◇ UNVERIFIED |
| ECEcc Corporation | Holden (jefferson) | — | ◇ UNVERIFIED |
| ECElectro Circuits Incorporated | Lowell | — | ◇ UNVERIFIED |
| EEmc | Westborough | — | ◇ UNVERIFIED |
| ECEmc CORP | Southborough | — | ◇ UNVERIFIED |
| ECEmc Corporation | Franklin | — | ◇ UNVERIFIED |
| EMEmd Millipore CORP | Taunton | — | ◇ UNVERIFIED |
| ESEnergy Sciences INC | Wilmington | — | ◇ UNVERIFIED |
| ESEnterprise Solutions | Bedford | — | ◇ UNVERIFIED |
| EIEpec Incorporated | New Bedford | — | ◇ UNVERIFIED |
| EIEquity Industrial Gheb LLP | East Bridgewater | — | ◇ UNVERIFIED |
| EREs Ritchie & Sons | Pembroke | — | ◇ UNVERIFIED |
| FEFenwal Electronics Incorported | Milford | — | ◇ UNVERIFIED |
| FSFenwal Safety Systems | Marlborough | — | ◇ UNVERIFIED |
| FPFisher Pierce | Weymouth | — | ◇ UNVERIFIED |
| FFFuji Film Recording Media Mfg | Bedford | — | ◇ UNVERIFIED |
| GIGe Infrastructure Sensing INC | Billerica | — | ◇ UNVERIFIED |
| GPGermanium Power Devices CORP | Andover | — | ◇ UNVERIFIED |
| HPHewlett Packard CORP | Andover | — | ◇ UNVERIFIED |
| HIHologic INC | Bedford | — | ◇ UNVERIFIED |
| HSHoneywell Sensing and Control | Acton | — | ◇ UNVERIFIED |
| HDHowland Developement Corporation | Gloucester | — | ◇ UNVERIFIED |
| HCHudson Creek LLC CO | Hudson | — | ◇ UNVERIFIED |
