| WPWes Pharma, INC | Westminster | MD | Chemical Manufacturing325412 | 20-99 | ◇ UNVERIFIED |
| WMWest Manufacturing | Hagerstown | MD | Furniture and Related Product Manufacturing337122 | 1-19 | ◇ UNVERIFIED |
| ADAbbey Drum CO | Baltimore | MD | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| AAbiomed | Baltimore City | MD | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| APAce Plating LLC | Joppa | MD | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| ABAdvanced Bioscience Laboratories, INC | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ADAdvanced Design Products | Finksburg | MD | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| AIAdvertising INC (graphic) | Hagerstown | MD | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Acton Lane Plant | Waldorf | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AIAggregate Industries - Severn Asphalt | Severn | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AUAirgas Usa, LLC | Hyattsville | MD | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| ACAirpax CORP. | Cambridge | MD | Computer and Electronic Product Manufacturing334000 | — | ◇ UNVERIFIED |
| ARAlexandria Real Estate Equities, INC. | Rockville | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AMAllan Myers Md, INC. - Aberdeen Asphalt Plant | Aberdeen | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AMAllan Myers Md, INC. -- Elk Mills Rap Plant | Elk Mills | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ASAll State Welding Products | Taneytown | MD | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| APAlmag Plating CORP. | Baltimore | MD | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| APAluglass Packaging | Snow Hill | MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| ACAmerican Color Graphics | Belcamp | MD | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| AIAmerican Infrastructure - Eden | Eden | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| APAmerican Plating Service INC | Baltimore | MD | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| AOAnchor (an Oldcastle Company)-white Marsh Plant | White Marsh | MD | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| A1Annapolis 1 | Annapolis | MD | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| ARAntenna Research Associates INC | Beltsville | MD | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| ATApi Technologies-weinschel | Frederick | MD | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| ANApplied Nanostructured Solutions, LLC. | Baltimore | MD | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| ACArcal Chemicals INC | Seat Pleasant | MD | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| AIAshland INC | Elkton | MD | Chemical Manufacturing325132 | — | ◇ UNVERIFIED |
| APAstrazeneca, Plp | Frederick | MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AUAtotech USA | Baltimore | MD | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ASAuto-chlor Systems of Baltimore | Baltimore | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| AGAutomated Graphic Systems | White Plains | MD | Printing and Related Support Activities323117 | — | ◇ UNVERIFIED |
| ARAutomatic Rolls of Baltimore | Baltimore | MD | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| BQBaltimore Quality Assurance | Baltimore | MD | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| BTBaltimore Transflo Terminal- Csx Transportatiion | Baltimore | MD | Food Manufacturing311613 | — | ◇ UNVERIFIED |
| BCBarnes Cabinet Shop | Frederick | MD | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| BLBausch & Lomb INC | Oakland | MD | Miscellaneous Manufacturing339115 | — | ◇ UNVERIFIED |
| BCBeavercreek Concrete Plant | Beaver Creek | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BEBeazer East INC - Salisbury | Salisbury | MD | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| BSBetco Supreme INC | Odenton | MD | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| BCBig Cork Vineyard Rohrersville | Rohresersville | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◇ UNVERIFIED |
| BLBizerba Label Solutions | Forest Hill | MD | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| BABlack and Decker U S Power Tools Group | Easton | MD | Machinery Manufacturing333991 | — | ◇ UNVERIFIED |
| BWBlaine Window Hardware | Hagerstown | MD | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| BIBlind Industries and Services of Md | Baltimore | MD | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| BMBluegrass Materials Marriottsville Quarry | Marriottsville | MD | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| BMBluegrass Materials Rockdale Quarry | Clear Spring | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BMBluegrass Materials Texas Quarry | Cockeysville | MD | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| BSBraden Sutphin Ink CO | Savage | MD | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| CAC. A. Bean, INC. | Mechanicsville | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
