Colonial Metals INC - Triumph Industrial Park Bldg 20 | Elkton | MD | Chemical Manufacturing325131 | — | ◇ UNVERIFIED |
| MPMccormick Paint Works CO | Frederick | MD | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| NDNew Dawn Manufacturing CO | Upper Marlboro | MD | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| NCNoxell CORP | Hunt Valley | MD | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| VIValpac, INC | Federalsburg | MD | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
Astek Diagnostics INC. | Halethorpe | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| APAdell Plastics | Halethorpe | MD | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| BCBaltimore City Composting/veolia Water North America-central, LLC | Curtis Bay | MD | Chemical Manufacturing325311 | — | ◐ LIKELY ACTIVE |
| BCBerkshire Corporation (formerly Disinfexol, Llc) | Rockville | MD | Chemical Manufacturing325612 | — | ◐ LIKELY ACTIVE |
| BBioreliance | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BPBora Pharmaceuticals Injectables INC. | Baltimore | MD | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| CICargill, Inc.-salt Division | White Marsh | MD | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| CCClariant CORP Masterb Atches Div | Millington | MD | Chemical Manufacturing325991 | — | ◐ LIKELY ACTIVE |
| FIFibred-maryland, INC. | Cumberland | MD | Chemical Manufacturing325221 | — | ◐ LIKELY ACTIVE |
| FCFmc CORP. Organic Chemicals Division | Baltimore | MD | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| GBGreenlight Biofuels Princess Anne, LLC | Princess Anne | MD | Chemical Manufacturing325193 | — | ◐ LIKELY ACTIVE |
| HDHemagen Diagnostics, INC. | Baltimore | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| HJHuber, J.m. Corporation | Havre De Grace | MD | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
Jubilant Cadista Pharmaceuticals, INC. | Salisbury | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| LILinde INC. | Baltimore | MD | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| MBMa Bioservices | Rockville | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| MIMacroGenics, Inc._CorpHQ | Rockville | MD | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| MBMaiden Biosciences, INC | Gaithersburg | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| MIMedimmune INC | Frederick | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| MLMedimmune LLC | Gaithersburg | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| MSMeso Scale Diagnostics, LLC | Rockville | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| MIMillennium Inorganic Chemicals St Helena Plant | Baltimore | MD | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| NSNaval Support Facility, Indian Head | Indian Head | MD | Chemical Manufacturing325920 | — | ◐ LIKELY ACTIVE |
| OBOrigin Baltimore Terminal LLC | Baltimore | MD | Chemical Manufacturing325000 | — | ◐ LIKELY ACTIVE |
| PIPrecigen INC | Germantown | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| RCRust-oleum Corporation - Hagerstown | Williamsport | MD | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| SASimplot Ab Retail, INC. | Pocomoke City | MD | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
| SISpectron, INC. | Elkton | MD | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| SPSupernus Pharmaceuticals, INC | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| TLTrigen Laboratories | Salisbury | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| UTUnited Therapeutics Corporation | Beltsville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| APAstrazeneca, Plp | Frederick | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| BDBecton Dickinson | Sparks | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| CFCase-mason Filling, INC. | Essex | MD | Chemical Manufacturing325620 | — | ◐ LIKELY ACTIVE |
| CMCatalent Maryland, INC. | Rockville | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| CMCatalent Maryland INC - Baltimore | Baltimore | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| DDDupont Dow Elastomers | Elkton | MD | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| GVGen Vec | Gaithersburg | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| KFKop Flex | Hanover | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| MBMiltenyl Biotec North America INC | Gaithersburg | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
On Demand Pharmaceuticals, INC. | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| TMThe Mill of Upperco, LLC | Hampstead | MD | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
| TTThermo Trilogy CORP | Columbia | MD | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
| WRW R Grace & CO Conn | Columbia | MD | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| ABAdvanced Bioscience Laboratories, INC | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |