| ABAltruist Brewing Company LLC | Fiskdale, MA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| ARAmazon Robotics | Westborough, MA | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| ASAmerican Superconductor | Westborough, MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| ASAmerican Superconductor | Devens, MA | Fabricated Metal Product Manufacturing332112 | — | ◇ UNVERIFIED |
| ATAmerican Tissue Mill #2 | Templeton (baldwinville), MA | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| APAnderson Power Prod Div Anderson Interco | Sterling, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| ATAnthony Tool and Die CORP. | Leominster, MA | Machinery Manufacturing333511 | — | ◇ UNVERIFIED |
| AEAo Eyewear, INC. | Southbridge, MA | Miscellaneous Manufacturing339115 | — | ◇ UNVERIFIED |
| AIAotec INC | Southbridge, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AMA.p. Machine Company, INC | Templeton, MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| ASAri & Sons Heavy Equipment Re | Worcester, MA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| ASAsi Staffing Group CORP. | Dudley, MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ALAstrellaink LLC | Auburn, MA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| APAtlantic Precision Sheet Metal LLC | Clinton, MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| ABAtlas Box and Crating Co., INC. | Sutton, MA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
| AGATR Graphics Inc. | Oxford, MA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| AFAvantor Fluid Handling LLC | Devens, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| BOBACK Of The House Inc. | Worcester, MA | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| BHBancroft Holding LLC | Leominster, MA | Machinery Manufacturing333511 | — | ◇ UNVERIFIED |
| BHBancroft Holding LLC Dba Fm Tool and Die | Lancaster, MA | Machinery Manufacturing333511 | — | ◇ UNVERIFIED |
| BAB and B Machining | Hubbardston, MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| BSBarker Steel, LLC | Milford, MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| BSBay State Apparel, Inc. | Leominster, MA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| BSBay State Gritcloth | Westborough, MA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| BPBermer Precision Products | Oxford, MA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| BLBevovations, LLC | Leominster, MA | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| BGB & G Restaurant Supply, INC. | Worcester, MA | Machinery Manufacturing333294 | — | ◇ UNVERIFIED |
| BEBigelow Electrical | Worcester, MA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| BBBik Boom Trucks LLC | Milford, MA | Machinery Manufacturing333923 | — | ◇ UNVERIFIED |
| BPBiochem Pharma, Shire Biolog & Gsk Biolog (former) | Northborough, MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| BOBlack Oxide Company, LLC | Worcester, MA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| BVBlackstone Valley Machining LLC | Mendon, MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| BBmp | Sterling, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| BPBoda Products INC | Fitchburg, MA | Machinery Manufacturing333314 | — | ◇ UNVERIFIED |
| BSBonner Sheet Metal CORP. | Auburn, MA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| BOBoutwell Owens & CO. Inc., | Fitchburg, MA | Paper Manufacturing322130 | — | ◇ UNVERIFIED |
| BCBrilla Coffee LLC | Rutland, MA | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| BEBriscon Electric | Auburn, MA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| BABullard Abrasive Products | Westborough, MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| BRBusiness Resources, Inc. | Westborough, MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| CPCantara Property | Southbridge, MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| CICapralogics INC | Hardwick, MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| CCCarbon Composites INC | Leominster, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| CCCarbon Composites INC Site 1 | Leominster, MA | Electrical Equipment, Appliance & Component Manufacturing335991 | — | ◇ UNVERIFIED |
| CCCardinal Comb Corporation | Leominster, MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
 Carpenter Technology | Worcester, MA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| CICastronics, INC | Mendon, MA | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| CCelledit | Worcester, MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| CMCentral Mass Baking Company Inc | Fitchburg, MA | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| CVCentury Vault Company, Incorporated | Oxford, MA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
