| CMCatalent Maryland INC - Baltimore | Baltimore | — | ◐ LIKELY ACTIVE |
| DDDupont Dow Elastomers | Elkton | — | ◐ LIKELY ACTIVE |
| GPGea Process Engineering INC | Columbia | — | ◐ LIKELY ACTIVE |
| GVGen Vec | Gaithersburg | — | ◐ LIKELY ACTIVE |
| KFKop Flex | Hanover | — | ◐ LIKELY ACTIVE |
| MBMiltenyl Biotec North America INC | Gaithersburg | — | ◐ LIKELY ACTIVE |
 On Demand Pharmaceuticals, INC. | Rockville | — | ◐ LIKELY ACTIVE |
| TMThe Mill of Upperco, LLC | Hampstead | — | ◐ LIKELY ACTIVE |
| TTThermo Trilogy CORP | Columbia | — | ◐ LIKELY ACTIVE |
| WRW R Grace & CO Conn | Columbia | — | ◐ LIKELY ACTIVE |
| ABAdvanced Bioscience Laboratories, INC | Rockville | — | ◇ UNVERIFIED |
| ALAerosol Liquid Packaging | Baltimore | — | ◇ UNVERIFIED |
| AUAirgas Usa, LLC | Hyattsville | — | ◇ UNVERIFIED |
| ARAlexandria Real Estate Equities, INC. | Rockville | — | ◇ UNVERIFIED |
| ASAll State Welding Products | Taneytown | — | ◇ UNVERIFIED |
| ACArcal Chemicals INC | Seat Pleasant | — | ◇ UNVERIFIED |
| AIAshland INC | Elkton | — | ◇ UNVERIFIED |
| APAstrazeneca, Plp | Frederick | — | ◇ UNVERIFIED |
| AUAtotech USA | Baltimore | — | ◇ UNVERIFIED |
| ASAuto-chlor Systems of Baltimore | Baltimore | — | ◇ UNVERIFIED |
| BIBarre-national INC. | Woodlawn | — | ◇ UNVERIFIED |
| BIBlind Industries and Services of Md | Baltimore | — | ◇ UNVERIFIED |
| BSBraden Sutphin Ink CO | Savage | — | ◇ UNVERIFIED |
| CPCapricorn Pharma | Frederick | — | ◇ UNVERIFIED |
| CBCatalent Bwi-1 | Harmans | — | ◇ UNVERIFIED |
| CCCentral Chemical CORP | Elkton | — | ◇ UNVERIFIED |
| CCCentral Chemical (hagerstown) | Hagerstown | — | ◇ UNVERIFIED |
| CMClorox Manufacturing Company | Aberdeen | — | ◇ UNVERIFIED |
| CCytec-solvay | Havre De Grace | — | ◇ UNVERIFIED |
| DPDaycon Products Company INC | Upper Marlboro | — | ◇ UNVERIFIED |
| DPDwyer Property Ground Water Plume | Elkton | — | ◇ UNVERIFIED |
| EIEisai, INC | Baltimore | — | ◇ UNVERIFIED |
| EIEisai, INC. | Baltimore | — | ◇ UNVERIFIED |
| EFElkton Farm Firehole | Elkton | — | ◇ UNVERIFIED |
| EBEmergent Biosolutions | Rockville | — | ◇ UNVERIFIED |
| ERExcalibur Realty Company | Beltsville | — | ◇ UNVERIFIED |
| FAFarmers and Planters Ag Llc> | Salisbury | — | ◇ UNVERIFIED |
| FTFleetwood Travel Trailers | Hancock | — | ◇ UNVERIFIED |
| GSGeo Specialty Chemicals | Baltimore | — | ◇ UNVERIFIED |
| GUGlaxosmithkline USA | Rockville | — | ◇ UNVERIFIED |
| GCGoldwell Cosmetics USA INC | Linthicum Heights | — | ◇ UNVERIFIED |
| GWGore, W.l. - Elk Creek Plant | Elkton | — | ◇ UNVERIFIED |
| GMGti Maryland LLC | Centreville | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Inc., Small Scale Manufacturing | Rockville | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Plant 1 | Rockville | — | ◇ UNVERIFIED |
| IPInsl-x Products CORP. | Baltimore | — | ◇ UNVERIFIED |
| ITIntercoastal Trading INC | Cambridge | — | ◇ UNVERIFIED |
| IRIntracel Resources LLC | Frederick | — | ◇ UNVERIFIED |
| IIIntralytix INC | Baltimore | — | ◇ UNVERIFIED |
| IIIntralytix, INC. | Columbia | — | ◇ UNVERIFIED |
