| FOF. O. Day Bituminous Company | Rockville | MD | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| LGLatin Goodness Foods, LLC | Rockville | MD | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| MBMa Bioservices | Rockville | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| MIMacroGenics, Inc._CorpHQ | Rockville | MD | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| MSMeso Scale Diagnostics, LLC | Rockville | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
M. Luis Products, LLC | Rockville | MD | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| SPSupernus Pharmaceuticals, INC | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| CMCatalent Maryland, INC. | Rockville | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| DFDay, F.o. Bituminous - Piney Mtg | Rockville | MD | Nonmetallic Mineral Product Manufacturing327992 | — | ◐ LIKELY ACTIVE |
| IIInt, INC | Rockville | MD | Printing and Related Support Activities323110 | — | ◐ LIKELY ACTIVE |
| MRMetal Raps | Rockville | MD | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
On Demand Pharmaceuticals, INC. | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| ABAdvanced Bioscience Laboratories, INC | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ARAlexandria Real Estate Equities, INC. | Rockville | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| EBEmergent Biosolutions | Rockville | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| GUGlaxosmithkline USA | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Inc., Small Scale Manufacturing | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Plant 1 | Rockville | MD | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| MPMccormick Paint Works Company | Rockville | MD | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| RIRegenxbio, INC. | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| RFRockville Fuel and Feed | Rockville | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix Llc-southlawn Ln | Rockville | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SLSmith Lithograph | Rockville | MD | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| 3R306 Rockville MD | Rockville | MD | Food Manufacturing311811 | 20-99 | ◐ LIKELY ACTIVE |
| ABAgNovos Bioscience (HQ) | Rockville | MD | Miscellaneous Manufacturing339113 | 20-99 | ◐ LIKELY ACTIVE |
| AIApogene, INC. | Rockville | MD | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| APAurinia Pharma US INC | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| CWCandy Wraps Dmv LLC | Rockville | MD | Miscellaneous Manufacturing339950 | — | ◐ LIKELY ACTIVE |
C&c Irradiator Service, LLC | Rockville | MD | Computer and Electronic Product Manufacturing334517 | — | ◐ LIKELY ACTIVE |
| CCCompost Crew INC a Benefit CORP | Rockville | MD | Chemical Manufacturing325315 | — | ◐ LIKELY ACTIVE |
| DAD & a Associates INC. | Rockville | MD | Furniture and Related Product Manufacturing337214 | — | ▲ REPORTED CLOSED |
| FWFlygirl Winery LLC | Rockville | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| GBGude Branch 00 | Rockville | MD | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| IPInterbalt Products CORP. | Rockville | MD | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| RBRockville Branch 25 | Rockville | MD | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| SUSeco Usa, INC | Rockville | MD | Computer and Electronic Product Manufacturing334111 | — | ◐ LIKELY ACTIVE |
| SLStacato LLC | Rockville | MD | Computer and Electronic Product Manufacturing334310 | — | ◐ LIKELY ACTIVE |
| TVTwin Valley Distillers | Rockville | MD | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| UUnipec | Rockville | MD | Plastics and Rubber Products Manufacturing326121 | 1-19 | ◐ LIKELY ACTIVE |
| YLYera-tech, L.l.c | Rockville | MD | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| LTLr Technologies, INC. | Rockville | MD | Computer and Electronic Product Manufacturing334220 | — | ◐ LIKELY ACTIVE |
| ARAmerican Reprographics Inc | Rockville | MD | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| AGAmerica's Granite INC. | Rockville | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BCBaklava Couture LLC | Rockville | MD | Food Manufacturing311821 | — | ◇ UNVERIFIED |
| BIBethesda Iron Works, INC. | Rockville | MD | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| BCBread Corner Inc. | Rockville | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| CBCangene Biopharma, LLC | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ILInterbiome, LLC | Rockville | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| MIMachfu INC | Rockville | MD | Computer and Electronic Product Manufacturing334118 | — | ◇ UNVERIFIED |
| MMMarble Mantel, INC. | Rockville | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |