| QCQuartermaine Coffee Roasters | Rockville | MD | Food Manufacturing311920 | 1-19 | ◐ LIKELY ACTIVE |
| ALAtg LLC | Rockville | MD | Computer and Electronic Product Manufacturing334220 | — | ◐ LIKELY ACTIVE |
| BBioreliance | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
Lensguide Imaging Technology INC | Rockville | MD | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
Sport Squad, INC. | Rockville | MD | Miscellaneous Manufacturing339920 | — | ◐ LIKELY ACTIVE |
| SLStacato LLC | Rockville | MD | Computer and Electronic Product Manufacturing334310 | 1-19 | ◐ LIKELY ACTIVE |
| CMCatalent Maryland, INC. | Rockville | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| LHLee Hy Construction Rockville Plant 5 | Rockville | VA | Petroleum and Coal Products Manufacturing324121 | 100-499 | ◐ LIKELY ACTIVE |
| MCMaselter Cabinets INC | Rockville | MN | Furniture and Related Product Manufacturing337110 | 1-19 | ◇ UNVERIFIED |
| MPMccormick Paint Works Company | Rockville | MD | Chemical Manufacturing325510 | 100-499 | ◇ UNVERIFIED |
| APAurinia Pharma US INC | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| BCBerkshire Corporation (formerly Disinfexol, Llc) | Rockville | MD | Chemical Manufacturing325612 | — | ◐ LIKELY ACTIVE |
| CPCheerio Printing Company, INC. | Rockville | MD | Printing and Related Support Activities323111 | 1-19 | ◐ LIKELY ACTIVE |
| DMDimensional Marble & Tile, INC. | Rockville | MD | Nonmetallic Mineral Product Manufacturing327991 | 20-99 | ◐ 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 |
| SBS B Cox Ready Mix INC - Goochland Plant | Rockville | VA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| SPSupernus Pharmaceuticals, INC | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| DFDay, F.o. Bituminous - Piney Mtg | Rockville | MD | Nonmetallic Mineral Product Manufacturing327992 | — | ◐ LIKELY ACTIVE |
| FOF. O. Day Bituminous Company | Rockville | MD | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| IIInt, INC | Rockville | MD | Printing and Related Support Activities323110 | — | ◐ LIKELY ACTIVE |
| LMLafarge Mid-atlantic INC Rockville Rmx | Rockville | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| LTLr Technologies, INC. | Rockville | MD | Computer and Electronic Product Manufacturing334220 | 1-19 | ◐ LIKELY ACTIVE |
| MRMetal Raps | Rockville | MD | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
On Demand Pharmaceuticals, INC. | Rockville | MD | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| SCSchuster Concrete Ready Mix Llc-southlawn Ln | Rockville | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| ABAdvanced Bioscience Laboratories, INC | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| ARAlexandria Real Estate Equities, INC. | Rockville | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| AVApac Virginia INC - Southern Equipment CO INC | Rockville | VA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| BRBranscome Richmond | Rockville | VA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| EBEmergent Biosolutions | Rockville | MD | Chemical Manufacturing325412 | — | ▲ REPORTED CLOSED |
| GUGlaxosmithkline USA | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Plant 1 | Rockville | MD | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| HGHuman Genome Sciences, Plant 2 | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| RIRegenxbio, INC. | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| RARockville Asphalt Plant | Rockville | VA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SISeegene, INC. | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| SLSmith Lithograph | Rockville | MD | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| 3R306 Rockville MD | Rockville | MD | Food Manufacturing311811 | 20-99 | ◐ LIKELY ACTIVE |
Butterfly Spirits, LLC | Rockville | MD | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| CWCandy Wraps Dmv LLC | Rockville | MD | Miscellaneous Manufacturing339950 | — | ◐ LIKELY ACTIVE |
| CCCompost Crew INC a Benefit CORP | Rockville | MD | Chemical Manufacturing325315 | — | ◐ LIKELY ACTIVE |
| CACross at a Walk Britton Winery | Rockville | IN | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DAD & a Associates INC. | Rockville | MD | Furniture and Related Product Manufacturing337214 | — | ▲ REPORTED CLOSED |
| ECEssex Concrete Corporation - Rockville | Rockville | VA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| FWFlygirl Winery LLC | Rockville | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| GBGude Branch 00 | Rockville | MD | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |