 Custom Design & Manufacturing | Carrollton | MI | — | ◇ UNVERIFIED |
| CFCustom Fabricated Metals, LLC | Perris | CA | — | ◇ UNVERIFIED |
 Custom Iron Works | Lodi | CA | — | ◇ UNVERIFIED |
| Custom Iron Works, INC. | South Beloit | IL | — | ◇ UNVERIFIED |
| CMCustom Metals | Little Rock | AR | — | ◇ UNVERIFIED |
| CMCustom Metal & Siding | Leesville | LA | — | ◇ UNVERIFIED |
| CPCustom Packline Engineering | Visalia | CA | — | ◇ UNVERIFIED |
| CSCustom Sheet and Plate, LLC | Tarentum | PA | — | ◇ UNVERIFIED |
| CSCustom Sheet and Steel Fabrication INC. | Council Grove | KS | — | ◇ UNVERIFIED |
| CSCustom Sheet & Steel Fabricators | Council Grove | KS | — | ◇ UNVERIFIED |
| CSCustom Steel Fabricators, INC. | Columbia | TN | — | ◇ UNVERIFIED |
| CSCustom Steel Manufacturing INC. | Belton | MO | — | ◇ UNVERIFIED |
| CSCustom Steel Service | Ames | IA | — | ◇ UNVERIFIED |
| COCycling on Two Wheels, LLC | Grovetown | GA | — | ◇ UNVERIFIED |
| CFCyncal Fabricators Inc | Bay Shore | NY | — | ◇ UNVERIFIED |
| DEDade Engineering Group LLC | Miami | FL | — | ◇ UNVERIFIED |
| DUDaeil USA Corporation | Valley | AL | — | ◇ UNVERIFIED |
| DID'agostino Iron Works | East Rochester | NY | — | ◇ UNVERIFIED |
| DMDaher-tli Manufacturing | Abingdon | VA | — | ◇ UNVERIFIED |
| DIDalco Industries | Billings | MT | — | ◇ UNVERIFIED |
| DIDalco Industries, INC. | Denver | CO | — | ◇ UNVERIFIED |
| DADaniel Alfred Candelaria, an Individual | Lathrop | CA | — | ◇ UNVERIFIED |
| DLDaniel Lang | Roseburg | OR | — | ◇ UNVERIFIED |
| DSDan's Steel Company | Salem | OR | — | ◇ UNVERIFIED |
| DSDan's Steel Company INC | Salem | OR | — | ◇ UNVERIFIED |
| DMDark Metal Machine Works | Oakland | CA | — | ◇ UNVERIFIED |
| DMDavid Marx, CO | Kenner | LA | — | ◇ UNVERIFIED |
| DRDavid Rosa, an Individual | Lathrop | CA | — | ◇ UNVERIFIED |
| DWDavid Whitlow Dba Whitco Steel Fabricators | Adamsville | TN | — | ◇ UNVERIFIED |
| DFDavis Fabricators, INC. | Oak Harbor | OH | — | ◇ UNVERIFIED |
| DRDayton Rogers Manufacturing company | Newberry | SC | — | ◇ UNVERIFIED |
| DRDayton Rogers of Ohio, Inc. | Obetz | OH | — | ◇ UNVERIFIED |
 Dayton Superior | Valparaiso | IN | — | ◇ UNVERIFIED |
| Dayton Superior Corporation | New Braunfels | TX | — | ◇ UNVERIFIED |
| DBDb Building Fasteners INC | Ontario | CA | — | ◇ UNVERIFIED |
| DMDb Motoring Group, INC. | Miami | FL | — | ◇ UNVERIFIED |
| DBD B Western INC | North Bend | OR | — | ◇ UNVERIFIED |
| DCD. Clement, INC. | Dunstable | MA | — | ◇ UNVERIFIED |
| DDD & D Machine Works, INC. | Orem | UT | — | ◇ UNVERIFIED |
| DMD&d Mobile Welding and Fabrication, INC. | Fort Pierce | FL | — | ◇ UNVERIFIED |
| DIDedoes Innovative Manufacturing INC | Fowlerville | MI | — | ◇ UNVERIFIED |
| DFDelco Fabrication LLC | New Orleans | LA | — | ◇ UNVERIFIED |
| DLDe Loera LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| DIDelos Industries Inc. | Payson | UT | — | ◇ UNVERIFIED |
| DFDelta Fabrication, LLC | Greenville | MS | — | ◇ UNVERIFIED |
| DFDelta Fabrication & Machine, INC. | Daingerfield | TX | — | ◇ UNVERIFIED |
| DIDelta Ironworks INC | Prunedale | CA | — | ◇ UNVERIFIED |
| DEDelwood Equipment LTD | — | WV | — | ◇ UNVERIFIED |
| DCDemag Cranes and Components CORP. (1318535255) | Solon | OH | — | ◇ UNVERIFIED |
| DSDemuth Steel Products, INC. | Mount Joy | PA | — | ◇ UNVERIFIED |
