| MFMid-atlantic Finishing CORP. | Capitol Heights | — | ● ACTIVE |
| BUBeretta U.s.a. CORP | Accokeek | — | ● ACTIVE |
Independent Custom Metalworks, LLC | Bladensburg | — | ● ACTIVE |
Kogok CORP | Upper Marlboro | — | ● ACTIVE |
| LELucian Enterprises INC. | Bladensburg | — | ● ACTIVE |
Maccrory Enterprises, INC. | Clinton | — | ● ACTIVE |
M Luis Products, LLC | Laurel | — | ● ACTIVE |
Nasatka Barrier, Incorporated | Clinton | — | ● ACTIVE |
United States Bullet Proofing, INC. | Upper Marlboro | — | ● ACTIVE |
| PFPerkinelmer Fluid Sciences | Beltsville | — | ◇ UNVERIFIED |
| ECEaton Corporation | Beltsville | — | ◐ LIKELY ACTIVE |
| PPittcon | Riverdale | — | ◐ LIKELY ACTIVE |
| FDFabrication Designs, INC. | Hyattsville | — | ◇ UNVERIFIED |
| HSHd Supply Construction Supply LTD | Hyattsville | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems Corporation | Beltsville | — | ◇ UNVERIFIED |
| WJWarring, James T Sons INC | Cheverly | — | ◇ UNVERIFIED |
| AIAIW, Inc. | Hyattsville | 100–499 | ◐ LIKELY ACTIVE |
| BMBeltsville Manufacturing Plant | Beltsville | 500+ | ◐ LIKELY ACTIVE |
| CICap Industries, INC. | Beltsville | — | ◐ LIKELY ACTIVE |
| DEDerosa Engineering, INC. | Upper Marlboro | — | ◐ LIKELY ACTIVE |
| GSGeneral Sheet Metal & Mechanical, LLC | Upper Marlboro | 100–499 | ◐ LIKELY ACTIVE |
| LCLindstrom Corporation | Hyattsville | 20–99 | ◐ LIKELY ACTIVE |
| PLPkl LLC | Beltsville | 1–19 | ◐ LIKELY ACTIVE |
| PMProgressive Machine, LLC | Beltsville | — | ◐ LIKELY ACTIVE |
| SWSonco Worldwide INC | Capitol Heights | — | ◐ LIKELY ACTIVE |
| SMStromberg Metal Works INC | Beltsville | — | ◐ LIKELY ACTIVE |
| TMT & M Machine Shop INC | Beltsville | — | ◐ LIKELY ACTIVE |
| USUnited States Bulletproofing, Inc | Upper Marlboro | 20–99 | ◐ LIKELY ACTIVE |
| FWForestville Welding and Iron Works, INC | Upper Marlboro | — | ◐ LIKELY ACTIVE |
| AFAction Fabricators & Erectors, INC. | Hyattsville | — | ◇ UNVERIFIED |
| CLCams, LLC | Clinton | — | ◇ UNVERIFIED |
| CHCapital Heights Iron Works, LLC | Capitol Heights | — | ◇ UNVERIFIED |
| GMGeneral Machine Shop, INC. | Landover | — | ◇ UNVERIFIED |
| LMLinda M. Orr-ciccozzi | Beltsville | — | ◇ UNVERIFIED |
| MIMarelco, INC. and Its Successors and Assigns | Beltsville | — | ◇ UNVERIFIED |
| MTMetro Test and Balance, INC. | Capitol Heights | — | ◇ UNVERIFIED |
| RFR & F Metals INC | Clinton | — | ◇ UNVERIFIED |
| SWSonco Worldwide INC | Bladensburg | — | ◇ UNVERIFIED |
| TMTsi/architectural Metals, INC. | Upper Marlboro | — | ◇ UNVERIFIED |
| ZTZebra Test Facility | Hyattsville | — | ◇ UNVERIFIED |