 Custom Products of Litchfield INC | Litchfield | MN | — | ◇ 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. | Randleman | NC | — | ◇ UNVERIFIED |
| CSCustom Steel Manufacturing INC. | Belton | MO | — | ◇ UNVERIFIED |
| CSCustom Steel Service | Ames | IA | — | ◇ UNVERIFIED |
| CACut Apart Metal Art | Aurora | CO | — | ◇ UNVERIFIED |
| CFC-ville Fabricating INC Dba Tarter | Liberty | KY | — | ◇ UNVERIFIED |
| CICv International INC | Torrance | CA | — | ◇ UNVERIFIED |
| CFCyncal Fabricators Inc | Bay Shore | NY | — | ◇ UNVERIFIED |
| CSCynergy Systems, INC. | Delray Beach | FL | — | ◇ 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 |
| DIDakota, Inc. | East Grand Forks | MN | — | ◇ UNVERIFIED |
| DIDalco Industries | Billings | MT | — | ◇ UNVERIFIED |
| DIDalco Industries, INC. | Denver | CO | — | ◇ UNVERIFIED |
| DADalton Ag Products | Lenox | IA | — | ◇ UNVERIFIED |
| DADaniel Alfred Candelaria, an Individual | Lathrop | CA | — | ◇ UNVERIFIED |
| DDDaniel Dole, Artist Blacksmith | Berkeley | 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 Maldonado | San Marcos | CA | — | ◇ UNVERIFIED |
| DMDavid Marx, CO | Kenner | LA | — | ◇ UNVERIFIED |
| DRDavid Rosa, an Individual | Lathrop | CA | — | ◇ UNVERIFIED |
| DWDavid Whitlow Dba Whitco Steel Fabricators | Adamsville | TN | — | ◇ UNVERIFIED |
| DVDa Vinci Metal Works, LLC | Chula Vista | CA | — | ◇ UNVERIFIED |
| DFDavis Fabricators, INC. | Oak Harbor | OH | — | ◇ UNVERIFIED |
| DGDavis Gregg Enterprises INC | Santee | CA | — | ◇ UNVERIFIED |
| DSDayton Steel Fabricators | Houston | TX | — | ◇ UNVERIFIED |
 Dayton Superior | Valparaiso | IN | — | ◇ UNVERIFIED |
| Dayton Superior Corporation | New Braunfels | TX | — | ◇ UNVERIFIED |
| DBDb Building Fasteners INC | Ontario | CA | — | ◇ UNVERIFIED |
| DADBM Associates, LLC | Lakeland | FL | — | ◇ UNVERIFIED |
| DBD B Western INC | North Bend | OR | — | ◇ UNVERIFIED |
| DSDCH Service Solutions LLC | Clarkesville | GA | — | ◇ UNVERIFIED |
| DCD. Clement, INC. | Dunstable | MA | — | ◇ UNVERIFIED |
| DIDcs Industries LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| DED&D Electric Motor Pump & Machine, Inc. | Moses Lake | WA | — | ◇ UNVERIFIED |
| DMD&d Mobile Welding and Fabrication, INC. | Fort Pierce | FL | — | ◇ UNVERIFIED |
| DWD&d Weld Fab, INC | Centerville | LA | — | ◇ UNVERIFIED |
| DDD & D Welding/fab INC. | Centerville | LA | — | ◇ UNVERIFIED |
| DADe Anza Contractors INC | Riverside | CA | — | ◇ UNVERIFIED |
| DIDedoes Innovative Manufacturing INC | Fowlerville | MI | — | ◇ UNVERIFIED |
| DADeere and Company | Paton | IA | — | ◇ UNVERIFIED |
| DCDeere & CO | Coal Valley | IL | — | ◇ UNVERIFIED |
