| SPSplash Products INC | Ayer | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| SSStainless Steel Coatings INC | South Lancaster | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| SCSterling Clark Lurton | Malden | MA | Chemical Manufacturing325191 | — | ◇ UNVERIFIED |
| SGSt Gobain Performance Plastics | Taunton | MA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
Sun Chemical Corporation | Mansfield | MA | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| SPSurface Protection Industries | North Billerica | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| TATeknor Apex CO | Attleboro | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| TPThermedics Polymer Products | Woburn | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| TFThermo Fisher Scientific | Bedford, Town of | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| TDThree Dimensional Ch | Danvers | MA | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| TCTodays Collision & Fleet Services INC | Boston (mattapan) | MA | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| TSTrelleborg Sealing Solutions | Northborough | MA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| TCTrimont Chemicals INC | Peabody | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| TATyco Adhesives LP | Lexington | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| UAUnited Aniline Company | Norwood | MA | Chemical Manufacturing325613 | — | ◇ UNVERIFIED |
| USUS Synthetics Corporation | Fitchburg | MA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| WCWalton Chase Elastomers INC | Hudson | MA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| WAWindfield Alloy | Lawrence | MA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| WBWinfield Brooks CO | Woburn | MA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| 1B124 Bernard East Saint Jean | East Falmouth | MA | Chemical Manufacturing325413 | 100-499 | ◐ LIKELY ACTIVE |
| 1L191 Lafayette Rd Dispensary Company LLC | Salisbury | MA | Chemical Manufacturing325411 | 20-99 | ◐ LIKELY ACTIVE |
| AWAbcam Waltham | Waltham | MA | Chemical Manufacturing325413 | 100-499 | ◐ LIKELY ACTIVE |
| ATAcer Therapeutics INC. | Boston | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| ABAlloplex Biotherapeutics LLC | Winchester | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| APAlnylam Pharmaceuticals, INC. | Cambridge | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| AIArdelyx, INC. | Waltham | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| AHAvient Holden | Holden | MA | Chemical Manufacturing325991 | 20-99 | ◐ LIKELY ACTIVE |
| BMBenjamin Moore & Company Milford MA Manufacturing Plant | Milford | MA | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| BMBeone Medicines Usa, INC. | Cambridge | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BLBfk LLC | Methuen | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BLBioentre LLC | Brookline | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BIBiofrontera INC | Woburn | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BMBlueprint Medicines Corporation | Cambridge | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BCBoston Catalent | Chelsea | MA | Chemical Manufacturing325414 | 100-499 | ◐ LIKELY ACTIVE |
| BFBountiful Farms Production | Lakeville | MA | Chemical Manufacturing325411 | 20-99 | ◐ LIKELY ACTIVE |
| BBBrammer Bio Plainville | Plainville | MA | Chemical Manufacturing325414 | 100-499 | ◐ LIKELY ACTIVE |
| BTBrilliantstrings Therapeutics, INC. | Lincoln | MA | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| CHCabot Haverhill | Haverhill | MA | Chemical Manufacturing325910 | 20-99 | ◐ LIKELY ACTIVE |
| CBCAPS Boston | Wodburn | MA | Chemical Manufacturing325412 | 20-99 | ◐ LIKELY ACTIVE |
| CSCell Signaling Technology, Inc - Beverly | Beverly | MA | Chemical Manufacturing325414 | 100-499 | ◐ LIKELY ACTIVE |
| CBChemGenes, Billerica | Billerica | MA | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| COChemical Operation- Taunton | Taunton | MA | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
| CCChroma Color Corporation - LEO | Leominster | MA | Chemical Manufacturing325991 | 20-99 | ◐ LIKELY ACTIVE |
| CACMi Ayer | Ayer | MA | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| CMCollagen Medical LLC | Boston | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| CPCollegium Pharmaceutical INC | Stoughton | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| CACommonwealth Alternative Care | Taunton | MA | Chemical Manufacturing325411 | 20-99 | ◐ LIKELY ACTIVE |
| CLCommonwealth Liquid Products - Fall River | Fall River | MA | Chemical Manufacturing325611 | 20-99 | ◐ LIKELY ACTIVE |
| CICorning, Inc. Bedford | Bedford | MA | Chemical Manufacturing325413 | 20-99 | ◐ LIKELY ACTIVE |
| CWCovestro Wilmington | Wilmington | MA | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |