| SEServolift Eastern Corporation | Boston | — | ◇ UNVERIFIED |
| SMSmart Metals | Lawrence | — | ◇ UNVERIFIED |
| SMSmtc Manufacturing CORP of Massachusetts | Franklin | — | ◇ UNVERIFIED |
| SASousa and Demayo INC | North Attleboro | — | ◇ UNVERIFIED |
| SSSouthbridge Sheet Metal | Southbridge | — | ◇ UNVERIFIED |
| SPSpecial Products Energy | Canton | — | ◇ UNVERIFIED |
| SMSpecialty Manufacturing | Amesbury | — | ◇ UNVERIFIED |
| SPStandard Plating Incorporated | West Springfield | — | ◇ UNVERIFIED |
| SIStandex International Spincraft Division | Billerica | — | ◇ UNVERIFIED |
| SIStanley-parker INC Stanley Tools Worcester Plant | Worcester | — | ◇ UNVERIFIED |
| SPStar Plating | New Bedford | — | ◇ UNVERIFIED |
| SMStd Mfg | Stoughton | — | ◇ UNVERIFIED |
| SMStevken Manufacturing | Billerica | — | ◇ UNVERIFIED |
| SFStillwater Fasteners | Freetown, Town of | — | ◇ UNVERIFIED |
| SLSturdy Lantern Manufacturing | Franklin | — | ◇ UNVERIFIED |
| SPSuperior Process Company | Framingham | — | ◇ UNVERIFIED |
| SUSwissturn USA INC | Oxford | — | ◇ UNVERIFIED |
| SISymmons Industrial INC | Braintree | — | ◇ UNVERIFIED |
| SMSynventive Molding Solutions | Peabody | — | ◇ UNVERIFIED |
| TITamer Industries | Somerset | — | ◇ UNVERIFIED |
| TMTdf Metal Finishing Company INC | Lynn | — | ◇ UNVERIFIED |
| TCTek Coating Company Incorporated | Amesbury | — | ◇ UNVERIFIED |
| TSTextron Systems Corporation | Wilmington | — | ◇ UNVERIFIED |
| TNThe New Can CO INC | Holbrook | — | ◇ UNVERIFIED |
| TITorwel Industries | Worcester | — | ◇ UNVERIFIED |
| TFTrw Fasteners Div | Cambridge | — | ◇ UNVERIFIED |
| TNTyrolit North America Incorporated | Westborough, Town of | — | ◇ UNVERIFIED |
| UNUsag Natick Ssc | Natick | — | ◇ UNVERIFIED |
| VPValentine Plating CO INC | West Springfield | — | ◇ UNVERIFIED |
| VTValentine Tool & Stamping Incorporated | Norton | — | ◇ UNVERIFIED |
| VPValley Plating Incorporated | Springfield | — | ◇ UNVERIFIED |
| VMVaughn Manufacturing Corporation | Salisbury | — | ◇ UNVERIFIED |
| VDVelvet Drive Transmissions | New Bedford | — | ◇ UNVERIFIED |
| VFVillage Forge INC | Boston | — | ◇ UNVERIFIED |
| VIVulcan Industries | Hudson | — | ◇ UNVERIFIED |
| WAWalton and Lonsbury Site | Attleboro | — | ◇ UNVERIFIED |
| WIWastequip INC | Georgetown | — | ◇ UNVERIFIED |
 Westfield Electroplating CO | Westfield | — | ◇ UNVERIFIED |
| WGWestfield Grinding Wheel | Westfield | — | ◇ UNVERIFIED |
| WAWestford Anodizing Corporation | Westford | — | ◇ UNVERIFIED |
| WWWf Wood INC | Holliston | — | ◇ UNVERIFIED |
| WEWheelabrator Energy Systems | Sturbridge | — | ◇ UNVERIFIED |
| WCWhitman Company INC | Whitman | — | ◇ UNVERIFIED |
| WHWireway Husky CORP | Sterling | — | ◇ UNVERIFIED |
| WSWoburn Steel Drum | Woburn | — | ◇ UNVERIFIED |
| WTWorcester Tool & Stamping CO | Leicester | — | ◇ UNVERIFIED |
| WMWright Machine CORP | Worcester | — | ◇ UNVERIFIED |
| WCWyman-gordon CO | Worcester | — | ◇ UNVERIFIED |
| 1W18 - Webstone | Worcester | 20–99 | ◐ LIKELY ACTIVE |
| 9G908 Georgetown | Georgetown | 1–19 | ◐ LIKELY ACTIVE |
