| BCBiltrite CORP the | Chelsea | MA | Leather and Allied Product Manufacturing316211 | — | ◇ UNVERIFIED |
| BIBiogen Incorporated | Cambridge, Town of | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BPBirch Point Paper Products INC | Fitchburg | MA | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| BMBird Machine Company | Walpole | MA | Machinery Manufacturing333291 | — | ◇ UNVERIFIED |
| BMB&j Manufacturing CO | Taunton | MA | Fabricated Metal Product Manufacturing332211 | — | ◇ UNVERIFIED |
| BMBnz Materials | Billerica | MA | Plastics and Rubber Products Manufacturing326150 | — | ◇ UNVERIFIED |
| BTBodycote Thermal Processing | Worcester | MA | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| BCBond Construction Corporation | Spencer | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BCBonded Concrete Pittsfield Plant | Pittsfield | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BEBook Enterprises LLC | Fall River | MA | Textile Product Mills314999 | — | ◇ UNVERIFIED |
| BCBose CORP | Framingham | MA | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| BCBoston Communications Group | Bedford | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| BDBoston Dpw Central Fleet Maintenance | Boston | MA | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| BMBoston Marine Services | Boston | MA | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| BOBoston Offset Gannet | Norwood | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| BPBoston Power Crushing CORP | Groveland | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
 Boston Scientific Corporation | Natick | MA | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| BTBoston Trailer Manufacturing Company | Walpole | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| BMBosun's Marine | Peabody | MA | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| BFBoudreau Finishing | Winchendon | MA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| BOBoutwell Owens & CO | Fitchburg | MA | Paper Manufacturing322212 | — | ◇ UNVERIFIED |
| BOBowne of Boston INC | Boston (south Boston) | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| BLBraintree Lab | Holbrook | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BSBraman Screw Machine | Millis | MA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| BBBrammer Bio Ma LLC | Somerville | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BGBreyers Good Humor Plant - Closed | Framingham | MA | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| BCBridgewater Correctional Complex | Bridgewater | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| BIBrockton Iron & Steel | Brockton | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BEBrookfield Engineering Laboratories INC | Middleborough | MA | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| BIBrox Industries INC | Merrimac | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BIBrox Industries INC | Ipswich | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BIBrox Industries Paving Material | Marlborough | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BPBtd Precision, INC. | Chicopee | MA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| BABullard Abrasive Products | Westborough | MA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| BIBurtman Iron Works | Boston | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| BFBurt's Furniture | E Longmeadow | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| BCButcher CO. | Marlborough | MA | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| BAButler Architectural Woodworking, Incorporated | New Bedford | MA | Furniture and Related Product Manufacturing337212 | 20-99 | ◇ UNVERIFIED |
| BWB & W Press INC | Georgetown | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| CCCabot Corporation | Billerica | MA | Chemical Manufacturing325182 | — | ◇ UNVERIFIED |
| CFCado Fabrications INC | Amesbury | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| CLCalorique LLC | Wareham | MA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| CMCambodian Mutual Assistance Association | Lowell | MA | Printing and Related Support Activities323117 | — | ◇ UNVERIFIED |
| CBCambridge Brands, Inc., a Subsidiary of Tootsie Roll Industries, INC. | Cambridge | MA | Food Manufacturing311330 | — | ◇ UNVERIFIED |
| CRCambridge Rindge & Latin High School | Cambridge | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CCameron | Millbury | MA | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| CDCampanelli Development LLC | Boxborough | MA | Computer and Electronic Product Manufacturing334112 | — | ◇ UNVERIFIED |
| CPCampus Plaza | Hadley | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CCCape Cod Aggregates | Barnstable | MA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CCCape Cod Biofuels | Sandwich | MA | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
