| FDFabrication Designs, INC. | Hyattsville | — | ◇ UNVERIFIED |
| FWFellowes Worcester Division | Belcamp | — | ◇ UNVERIFIED |
| HSHd Supply Construction Supply LTD | Hyattsville | — | ◇ UNVERIFIED |
Kaydon Ring & Seal INC | Baltimore | — | ◇ UNVERIFIED |
| KAKeystone Automotive Plating CORP | Linthicum | — | ◇ UNVERIFIED |
| MPMetro Plating and Polishing Group INC. | Kensington | — | ◇ UNVERIFIED |
| NWNiermann Weeks Company, INC | Millersville | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems Corporation | Beltsville | — | ◇ UNVERIFIED |
| NINovatec INC | Brooklyn | — | ◇ UNVERIFIED |
| PPace | Annapolis Junction | — | ◇ UNVERIFIED |
| PIPier-sol, INC. | Baltimore | — | ◇ UNVERIFIED |
| FW[r3 Fy12] Window Depot USA of Frederick | Frederick | — | ◇ UNVERIFIED |
| RMRay Machine Company INC | Baltimore | — | ◇ UNVERIFIED |
| RURegina USA INC | Cambridge | — | ◇ UNVERIFIED |
| STSurface Treatment Technologies | Halethorpe | — | ◇ UNVERIFIED |
| TMTalley Metal Products | Hagerstown | — | ◇ UNVERIFIED |
| TFTechnical Finishers | Rosedale | — | ◇ UNVERIFIED |
| TMThomas Manufacturing Corporation | Parkton | — | ◇ UNVERIFIED |
| WJWarring, James T Sons INC | Cheverly | — | ◇ UNVERIFIED |
| WAWashington Aluminum | Baltimore | — | ◇ UNVERIFIED |
| WIWestern Industrial Machine | Westminster | — | ◇ UNVERIFIED |
| 3C360 Coatings LLC | Mechanicsville | — | ◐ LIKELY ACTIVE |
| ASAalberts Surface Technologies- Baltimore | Baltimore | 1–19 | ◐ LIKELY ACTIVE |
| AIA.e.c.s INC | Lineboro | — | ◐ LIKELY ACTIVE |
| AIAIW, Inc. | Hyattsville | 100–499 | ◐ LIKELY ACTIVE |
| ASApplied Solutions Group ASG BA Products Columbia | Columbia | 20–99 | ◐ LIKELY ACTIVE |
| AIAtlantic Industrial, Mechanical and Environmental, INC. | Baltimore | — | ◐ LIKELY ACTIVE |
| BCBaltimore Comp Maint | Baltimore | 1–19 | ◐ LIKELY ACTIVE |
| BMBaltimore Machine Works LLC | Phoenix | — | ◐ LIKELY ACTIVE |
| BBelcamp | Belcamp | 20–99 | ◐ LIKELY ACTIVE |
| BMBeltsville Manufacturing Plant | Beltsville | 500+ | ◐ LIKELY ACTIVE |
| BPBest Plumbing Specialties INC | Myersville | — | ◐ LIKELY ACTIVE |
| BPBraswell Precision INC. | Glen Burnie | — | ◐ LIKELY ACTIVE |
| CSCANAM steel Corp. | Point of Rocks | 100–499 | ◐ LIKELY ACTIVE |
| CICap Industries, INC. | Beltsville | — | ◐ LIKELY ACTIVE |
| CSCardillo Scott | Indian Head | — | ◐ LIKELY ACTIVE |
| CMCarlstan Machining, INC. | Halethorpe | — | ◐ LIKELY ACTIVE |
| CECentral Engineering, INC. | Upperco | — | ◐ LIKELY ACTIVE |
| CCCiena CORP | Hanover | — | ◐ LIKELY ACTIVE |
| CGCiena Government Solutions INC | Hanover | — | ◐ LIKELY ACTIVE |
| CCCityscape Container CORP | Baltimore | — | ◐ LIKELY ACTIVE |
| CECj Engineering, L.l.c. | Owings Mills | — | ◐ LIKELY ACTIVE |
| CDClarkWestern Dietrich Building Systems - Baltimore, MD | Baltimore | 20–99 | ◐ LIKELY ACTIVE |
| CDComus Design and Construction, INC | Clarksburg | — | ◐ LIKELY ACTIVE |
| CMConstellation Machining LLC | Mechanicsville | — | ◐ LIKELY ACTIVE |
| CPConveyors & Plastics INC | Delmar | — | ◐ LIKELY ACTIVE |
| CCCrown Cork & Seal USA, Inc. - Belcamp Plant | Belcamp | 20–99 | ◐ LIKELY ACTIVE |
| CTCvl Technical Sales INC | Baltimore | — | ◐ LIKELY ACTIVE |
| DEDerosa Engineering, INC. | Upper Marlboro | — | ◐ LIKELY ACTIVE |
| DFDess Fluid Power | Joppa | 20–99 | ◐ LIKELY ACTIVE |