| APAlmeida Precision Machining Inc. | Walpole | — | ◇ UNVERIFIED |
| AAAmerican Architectural Iron | Boston | — | ◇ UNVERIFIED |
| AEAmerican Electroplating Company | Lawrence | — | ◇ UNVERIFIED |
| AEAmerican Electroplating Company | Lawrence | — | ◇ UNVERIFIED |
| AEAmerican Engineered Components INC | Boston (brighton) | — | ◇ UNVERIFIED |
| AMAmerican Metalcraft Co, INC | East Weymouth | — | ◇ UNVERIFIED |
| ASAmerican Superconductor | Devens | — | ◇ UNVERIFIED |
| AMAmherst Machine CO. | North Amherst | — | ◇ UNVERIFIED |
| APAms Precision Machining INC | Brockton | — | ◇ UNVERIFIED |
| ASAnvil Steel Engineering Inc. | Taunton | — | ◇ UNVERIFIED |
| ABAotco Billerica Building 4 | Billerica | — | ◇ UNVERIFIED |
| ASAplus Screw Machine Products LLC | Bedford | — | ◇ UNVERIFIED |
| AMA.p. Machine Company, INC | Templeton | — | ◇ UNVERIFIED |
| APApplied Plastics CO. INC | Norwood | — | ◇ UNVERIFIED |
 Arc Technologies LLC | Amesbury | — | ◇ UNVERIFIED |
| AEAriston Engraving & Machine Co, INC. | Woburn | — | ◇ UNVERIFIED |
| ALArmset LLC | Middleton | — | ◇ UNVERIFIED |
| AOAsahi Organic Chemicals Industry Co., LTD | Malden | — | ◇ UNVERIFIED |
| APAtlantic Precision Sheet Metal LLC | Clinton | — | ◇ UNVERIFIED |
| BAB and B Machining | Hubbardston | — | ◇ UNVERIFIED |
| BSBarker Steel, LLC | Milford | — | ◇ UNVERIFIED |
| BIBaron Industries | Woburn | — | ◇ UNVERIFIED |
| BCBarry Controls | Watertown | — | ◇ UNVERIFIED |
| BSBay Steel Co., INC. | Halifax | — | ◇ UNVERIFIED |
| BSBeacon Sales Acquisition, INC | West Bridgewater | — | ◇ UNVERIFIED |
| BTBehning Tool | Hanover | — | ◇ UNVERIFIED |
| BPBell's Powder Coating, Inc. | North Attleboro | — | ◇ UNVERIFIED |
| BPBenchmark Precision Products LLC | West Newbury | — | ◇ UNVERIFIED |
| BPBenco Precision Machining INC | Gloucester | — | ◇ UNVERIFIED |
| BCBenjamin C Lavoie | Buzzards Bay | — | ◇ UNVERIFIED |
| BMBerkshire Manufacturing Corporation | Southwick | — | ◇ UNVERIFIED |
| BMBetter Maintenance Sheet Metal CORP. | Newburyport | — | ◇ UNVERIFIED |
| BOBlack Oxide Company, LLC | Worcester | — | ◇ UNVERIFIED |
| BVBlackstone Valley Machining LLC | Mendon | — | ◇ UNVERIFIED |
| BSBonner Sheet Metal CORP. | Auburn | — | ◇ UNVERIFIED |
| BABoston Automatic Sprinkler Fabrication, INC. | Rockland | — | ◇ UNVERIFIED |
| BLBoston Lasers Precision Cut, LLC | Amesbury | — | ◇ UNVERIFIED |
| BRBoston Renaissance Charter School | Boston (hyde Park) | — | ◇ UNVERIFIED |
| BUBoston University-department of Physics | Boston | — | ◇ UNVERIFIED |
| BFBoundary Fence & Railing Systems, INC. | Marlborough | — | ◇ UNVERIFIED |
| BABps Automated Manufacturing Solutions | Kingston | — | ◇ UNVERIFIED |
| BABps Automated Manufacturing Solutions | Kingston | — | ◇ UNVERIFIED |
| BLBrewer's Ledge Incorporated | Randolph | — | ◇ UNVERIFIED |
| BEBriscon Electric | Auburn | — | ◇ UNVERIFIED |
| BEBroken Edge Deburring, INC. | West Springfield | — | ◇ UNVERIFIED |
| BMBrothers Machining CORP | Mansfield | — | ◇ UNVERIFIED |
| BSBryant Sheet Metal, INC. | Hanover | — | ◇ UNVERIFIED |
| BEBuilding Envelope Systems | Plainville | — | ◇ UNVERIFIED |
| BABullard Abrasive Products | Westborough | — | ◇ UNVERIFIED |
| BMBve Marlborough | Marlborough | — | ◇ UNVERIFIED |
