| NGNorthrop Grumman Systems Corporation | Annapolis | MD | Computer and Electronic Product Manufacturing334290 | — | ◐ LIKELY ACTIVE |
| NGNorthrop Grumman Systems Corporation | Sykesville | MD | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| RERidge Engineering, LLC. | Hampstead | MD | Fabricated Metal Product Manufacturing332312 | — | ◐ LIKELY ACTIVE |
| TWTaylor Water Technologies - Main | Sparks | MD | Computer and Electronic Product Manufacturing334513 | 100-499 | ◐ LIKELY ACTIVE |
| AAAllied-signal Aerospace CO. Microelectronics & Technology Cntr | Columbia | MD | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| NGNorthrop Grumman Systems Corporation - Troy Hill 1 | Elkridge | MD | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| SDSmiths Detection Edgewood, INC. | Edgewood | MD | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| TFTeledyne Flir Defense, INC. | Elkridge | MD | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| WCWorcester County Dpw | Berlin | MD | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| AAbiomed | Baltimore City | MD | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
| AVAdvanced Vacuum Company | Westminster | MD | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| ACAirpax CORP. | Cambridge | MD | Computer and Electronic Product Manufacturing334000 | — | ◇ 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 |
| DSDrs-signal Solutions INC | Gaithersburg | MD | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| GEGalaxy Electryronics Associates INC | Laurel | MD | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| ICIbm Corporation | Gaithersburg | MD | Computer and Electronic Product Manufacturing334113 | — | ◇ UNVERIFIED |
| MMMartin Marietta Laboratories | Halethorpe | MD | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Sys CORP | Gaithersburg | MD | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP -troy Hill 4 | Elkridge | MD | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| QAQuad Avenue Chemical & Biofuels Site | Baltimore | MD | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| RDRpg Diffuser Systems | Upper Marlboro | MD | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| SASwales & Assoc Frederick Av | Beltsville | MD | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| WRWebtec Railway Electronics | Germantown | MD | Computer and Electronic Product Manufacturing334418 | — | ◇ UNVERIFIED |
| WSWilcoxon Sensing Technologies | Frederick | MD | Computer and Electronic Product Manufacturing334519 | — | ◇ UNVERIFIED |
| ACAbsolute Controls LLC | Frederick | MD | Computer and Electronic Product Manufacturing334512 | — | ◐ LIKELY ACTIVE |
| AEAce Electronics Defense Systems, LLC | Aberdeen Proving Ground | MD | Computer and Electronic Product Manufacturing334419 | — | ◐ LIKELY ACTIVE |
| AMAdvanced Mission Partners LLC | Linthicum Heights | MD | Computer and Electronic Product Manufacturing334418 | — | ◐ LIKELY ACTIVE |
| ATAllumax Tti, LLC | Adamstown | MD | Computer and Electronic Product Manufacturing334419 | — | ◐ LIKELY ACTIVE |
| AMAlpha Mos America INC | Glen Burnie | MD | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| ACAmnet Computers, L.l.c. | Baltimore | MD | Computer and Electronic Product Manufacturing334112 | — | ◐ LIKELY ACTIVE |
| ATAppropriate Technical Resources LLC | Mount Airy | MD | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| ACArcadian Computers LLC | La Plata | MD | Computer and Electronic Product Manufacturing334111 | — | ◐ LIKELY ACTIVE |
| BSBAE Systems I&S - Lexington Park | Lexington Park | MD | Computer and Electronic Product Manufacturing334290 | 100-499 | ◐ LIKELY ACTIVE |
| BSBAE Systems I&S - Maritime Solutions | California | MD | Computer and Electronic Product Manufacturing334511 | 100-499 | ◐ LIKELY ACTIVE |
| BSBAE Systems I&S - T&E | California | MD | Computer and Electronic Product Manufacturing334511 | 20-99 | ◐ LIKELY ACTIVE |
| BBBall & Ball Communications INC | Laurel | MD | Computer and Electronic Product Manufacturing334290 | — | ◐ LIKELY ACTIVE |
| BCBlanchard Communications | Annapolis | MD | Computer and Electronic Product Manufacturing334220 | — | ◐ LIKELY ACTIVE |
| BNBrilliant Neurotechnologies LLC | Ellicott City | MD | Computer and Electronic Product Manufacturing334510 | — | ◐ LIKELY ACTIVE |
| BUByk-gardner USA LLC | Columbia | MD | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| CLCaci Lgs Innovations LLC | Jessup | MD | Computer and Electronic Product Manufacturing334290 | — | ◐ LIKELY ACTIVE |
C&c Irradiator Service, LLC | Rockville | MD | Computer and Electronic Product Manufacturing334517 | — | ◐ LIKELY ACTIVE |
| CTCea Technologies INC | Hanover | MD | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| CDChaostech Defense LLC | Suitland | MD | Computer and Electronic Product Manufacturing334290 | — | ◐ LIKELY ACTIVE |
| CTCharon Technologies, LLC | Columbia | MD | Computer and Electronic Product Manufacturing334515 | — | ◐ LIKELY ACTIVE |
| CAChips Ai LLC | Potomac | MD | Computer and Electronic Product Manufacturing334413 | — | ◐ LIKELY ACTIVE |
| CMClinical Microsystems Corporation | Riva | MD | Computer and Electronic Product Manufacturing334510 | — | ▲ REPORTED CLOSED |
| CColumbia | Columbia | MD | Computer and Electronic Product Manufacturing334220 | 1-19 | ◐ LIKELY ACTIVE |