| TCTechnical Coatings, INC. | Canton | MA | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| TGThe Gillette Company LLC | Andover | MA | Chemical Manufacturing325620 | 100-499 | ◐ LIKELY ACTIVE |
| TSTurfCare Supply Hatfield MA | Hatfield | MA | Chemical Manufacturing325314 | 20-99 | ◐ LIKELY ACTIVE |
| TRTwin River Technologies | Quincy | MA | Chemical Manufacturing325199 | 100-499 | ◐ LIKELY ACTIVE |
| UBUltragenyx - Bedford | Bedford | MA | Chemical Manufacturing325414 | 100-499 | ◐ LIKELY ACTIVE |
| VDVeranova - Devens | Devens | MA | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| VNVeranova - North Andover | North Andover | MA | Chemical Manufacturing325412 | 20-99 | ◐ LIKELY ACTIVE |
| VIVerastem, INC. | Needham | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| VIVolatylix INC | Cambridge | MA | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| WSWalpole Site | East Walpole | MA | Chemical Manufacturing325413 | 500+ | ◐ LIKELY ACTIVE |
| ZTZeal Therapeutics, INC | Medford | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| NBNuwagen Bio, INC. | Watertown | MA | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| PAPhoenix Adhesives | Acton | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
Rapid Coatings INC | Woburn | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| UPUnicus Pharmaceuticals, LLC | Taunton | MA | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| AIAA-Install inc. | Plainville | MA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| AIAccrx INC | Newton | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| ANActega North America | Shrewsbury | MA | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| AAddgene | Cambridge | MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| AAddgeneinc | Watertown | MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ACAdvanced Compounding Solutions | Woburn | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AFAdvanced FRP Systems, Inc. | Plymouth | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| AFAdvanced Frp Systems INC | Weymouth | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| ARAgler Raymond | Gloucester | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| APAir Products and Chemicals INC | Marlborough | MA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| AIAlkermes INC | Cambridge | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| APAlnylam Pharmaceuticals INC | Cambridge | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| ACAlpha Chemical Services, INC. | Stoughton | MA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| ACAmbit Creative Group | Brighton | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| ATAmericad Technology Corporation | Norwood | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| ARAmerican River Nutrition LLC | Hadley | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| AVAmerican Velodur Metal INC | Plymouth | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| ATAmide Technologies INC | Waltham | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AFAnjen Finishing, Inc. | Marlborough | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| APApeloa Pharma Solutions CO | Billerica | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
Applied Biosystems INC | Cambridge | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| ABArranta Bio Ma LLC | Boxborough | MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ASAsi Staffing Group CORP. | Dudley | MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| AIAvedro INC | Waltham | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AIAvedro INC | Burlington | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| ALAviva Labs, Inc. | Wilmington | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
Azurity Pharmaceuticals INC | Wilmington | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BPBell's Powder Coating Inc. | North Attleboro | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BCBerkshire Corporation | Great Barrington | MA | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| BRBerkshire Roots | Pittsfield | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| BLBiodevelopment Laboratories I | Cambridge | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BLBiodevelopment Laboratories INC | Cambridge, Town of | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BIBlank Industries LLC | Hudson | MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| BIBlock Island Brands INC | Boston | MA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| BGBoc Gasses Boc Group | Acton | MA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |