| HGHuman Genome Sciences, Plant 1 | Rockville | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Plant 2 | Rockville | — | ◇ UNVERIFIED |
| IPInsl-x Products CORP. | Baltimore | — | ◇ UNVERIFIED |
| ITIntercoastal Trading INC | Cambridge | — | ◇ UNVERIFIED |
| IRIntracel Resources LLC | Frederick | — | ◇ UNVERIFIED |
| KWKemira Water Solutions, INC. - Baltimore Plant | Curtis Bay | — | ◇ UNVERIFIED |
| KFKeymar Fertilizer, INC. | Keymar | — | ◇ UNVERIFIED |
| KPKite Pharma, INC. | Frederick | — | ◇ UNVERIFIED |
| LCLamotte Company | Chestertown | — | ◇ UNVERIFIED |
| LCLebanon Chemical 50 | Baltimore | — | ◇ UNVERIFIED |
| LBLegend Brands | Baltimore | — | ◇ UNVERIFIED |
| LTLife Technologies | Frederick | — | ◇ UNVERIFIED |
 Life Technologies | Frederick | — | ◇ UNVERIFIED |
| LTLife Technologies INC | Gaithersburg | — | ◇ UNVERIFIED |
| LMLynch, Md | Worton | — | ◇ UNVERIFIED |
| MCMaryland Compassionate Care and Wellness | Taneytown | — | ◇ UNVERIFIED |
| MMelwood | Upper Marlboro | — | ◇ UNVERIFIED |
| MSMerial Select | Berlin | — | ◇ UNVERIFIED |
| NJNew Jersey Fireworks | Elkton | — | ◇ UNVERIFIED |
| NCNoxell CORP. | Cockeysville | — | ◇ UNVERIFIED |
| NLNutramax Laboratories | Edgewood | — | ▲ REPORTED CLOSED |
| PCPemco CORP - Yard 56 | Baltimore | — | ◇ UNVERIFIED |
| PPPharmaceutical Preperation Manufacturing | Hunt Valley | — | ◇ UNVERIFIED |
| PIPharmaceutics International INC. | Cockeysville | — | ◇ UNVERIFIED |
| PIPharmaceutics International, INC. | Hunt Valley | — | ◇ UNVERIFIED |
| PIPlastipak INC | Havre De Grace | — | ◇ UNVERIFIED |
| PCPq CORP. | Baltimore | — | ◇ UNVERIFIED |
| RIRegenxbio, INC. | Rockville | — | ◇ UNVERIFIED |
| RCReichhold Chem INC. | Baltimore | — | ◇ UNVERIFIED |
| RPRockwood Pigments N a INC | Beltsville | — | ◇ UNVERIFIED |
| SCSasol Chemicals (usa) LLC | Baltimore | — | ◇ UNVERIFIED |
| SISeegene, INC. | Rockville | — | ◇ UNVERIFIED |
| SWSherwin Williams Cleaning Solutions | Havre De Grace | — | ◇ UNVERIFIED |
| SUShire U.s. Manufacturing | Owings Mills | — | ◇ UNVERIFIED |
| SSSouthern States Cooperative, INC - Queen Anne's County Service | Centreville | — | ◇ UNVERIFIED |
| SSSouthern States Coop, INC. - Frederick | Frederick | — | ◇ UNVERIFIED |
 Sun Chemical CORP | Williamsport | — | ◇ UNVERIFIED |
| SISyngene International LTD. | Baltimore | — | ◇ UNVERIFIED |
| TGTexas Gulf Industries, INC. | Baltimore | — | ◇ UNVERIFIED |
| TSThe Sun Products Corporation | Baltimore | — | ◇ UNVERIFIED |
| TCTishcon CORP | Salisbury | — | ◇ UNVERIFIED |
| UWU.s. Water Services | Aberdeen | — | ◇ UNVERIFIED |
| VHVireo Health | Hurlock | — | ◇ UNVERIFIED |
| WDWecare Denali, LLC | Woodbine | — | ◇ UNVERIFIED |
| WAWillard Agri-services of Mt. Airy | Maryland | — | ◇ UNVERIFIED |
| ABAnnapolis Branch 17 | Annapolis | 1–19 | ◐ LIKELY ACTIVE |
| AMAnnapolis, MD | Annapolis | 1–19 | ◐ LIKELY ACTIVE |
| AFAstraZeneca Frederick Manufacturing Center | Frederick | 500+ | ◐ LIKELY ACTIVE |
| BBBaltimore Biopark | Baltimore | 100–499 | ◐ LIKELY ACTIVE |
| BBBaltimore Branch 19 | Baltimore | 20–99 | ◐ LIKELY ACTIVE |
