| STSem Tec INC | Worcester, MA | Fabricated Metal Product Manufacturing332991 | — | ◇ UNVERIFIED |
| SSSerrato Signs | Worcester, MA | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| STService Tire Truck Center | Millbury, MA | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| SPShepard & Parker Incorporated | Fitchburg, MA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| SIS I Howard Glass CO. INC. | Worcester, MA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| SISimonds International CORP | Fitchburg, MA | Wood Product Manufacturing321211 | — | ◇ UNVERIFIED |
| STSimplex Time Recorder CO -tyco Safety Products | Westminster, MA | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| SSSouthbridge Sheet Metal | Southbridge, MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| SLSouthwin LTD | Leominster, MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| SPSpecialty Polymers | Leominster, MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| SCSpectro Coating CORP | Leominster, MA | Textile Mills313312 | — | ◇ UNVERIFIED |
| SSStainless Steel Coatings INC | South Lancaster, MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| SIStanley-parker INC Stanley Tools Worcester Plant | Worcester, MA | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| SPSteel Products Company | Leicester, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| SCSterling Concrete CORP | Sterling, MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SLStevens Linen Mill | Dudley, MA | Textile Product Mills314991 | — | ◇ UNVERIFIED |
| SIStoropack Incorporated | Westboro, MA | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| SUSwissturn USA INC | Oxford, MA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| TTTable Talk Pies Incorporated | Worcester, MA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| TTTable Talk Pies, LLC | Worcester, MA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| TPTamor Plastics Company | Leominster, MA | Paper Manufacturing322221 | — | ◇ UNVERIFIED |
| TRTantasqua Regional Hs | Fiskdale, MA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| TCTe Connectivity | Worcester, City of, MA | Electrical Equipment, Appliance & Component Manufacturing335929 | — | ◇ UNVERIFIED |
| TCThg CORP | Northborough, MA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| TIToltec INC | Dudley, MA | Textile Mills313210 | — | ◇ UNVERIFIED |
| TITorwel Industries | Worcester, MA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| TCTrelleborg Coating Systems Archer Rubber | Milford, MA | Textile Mills313320 | — | ◇ UNVERIFIED |
| TSTrelleborg Sealing Solutions | Northborough, MA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| TITrw INC Fasteners Div | Westminster, MA | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| TCTuthill CORP Coppus Turbin | Millbury, MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| TNTyrolit North America Incorporated | Westborough, Town of, MA | Fabricated Metal Product Manufacturing332994 | — | ◇ UNVERIFIED |
| UGUn1f1ed2 Global Packaging Group | Worcester, MA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| UPUnion Products INC | Leominster, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| UUnisorb | Millbury, MA | Textile Product Mills314991 | — | ◇ UNVERIFIED |
| UPUnited Parcel Service Maleo | Leominster, MA | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| USUS Synthetics Corporation | Fitchburg, MA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| UQUtz Quality Foods INC | Fitchburg, MA | Food Manufacturing311919 | — | ◇ UNVERIFIED |
| VIVellumoid INC | Worcester, MA | Miscellaneous Manufacturing339991 | — | ◇ UNVERIFIED |
| VOVerrillon Optical Fiber Facility | Grafton (north Grafton), MA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| VVita-crete | Milford, MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| VWVogue Wallcoverings | Fitchburg, City of, MA | Paper Manufacturing322299 | — | ◇ UNVERIFIED |
| WPWarren Pumps INC | Warren, MA | Machinery Manufacturing333911 | — | ◇ UNVERIFIED |
| WNWeetabix North America | Clinton, MA | Food Manufacturing311230 | — | ◇ UNVERIFIED |
| WWWest Warren Mill Complex | Warren, MA | Textile Product Mills314991 | — | ◇ UNVERIFIED |
| WEWheelabrator Energy Systems | Sturbridge, MA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| WHWireway Husky CORP | Sterling, MA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| WJW J Graves Construction CO | Templeton, MA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| WWolfcoach | Auburn, MA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| WAWood Art Incorporated | Leicester, MA | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| WWoodmeister | Holden, MA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
