| DPDesigner Palms INC | Andover | KS | — | ◇ UNVERIFIED |
| DHDesign Hardware | Mesquite | TX | — | ◇ UNVERIFIED |
| DSDe Steel, INC | Calhan | CO | — | ◇ UNVERIFIED |
| DBDeterman Brownie INC - Nassau St | Minneapolis | MN | — | ◇ UNVERIFIED |
| DTDetroit Tool & Metal Products | Fort Madison | IA | — | ◇ UNVERIFIED |
| DADevincenzi Architectural Products | Burlingame | CA | — | ◇ UNVERIFIED |
| DMDevincenzi Metal Products | Burlingame | CA | — | ◇ UNVERIFIED |
| DGDfw Grating, INC. | Dallas | TX | — | ◇ UNVERIFIED |
 DGG Industries, Inc. | Attleboro | MA | — | ◇ UNVERIFIED |
| DWDg Welding and Design, LLC | Malta | OH | — | ◇ UNVERIFIED |
| DWDg Welding - Manufacturing INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| DDDh Docks LLC | Nisswa | MN | — | ◇ UNVERIFIED |
| DSDh Steel Products, LLC | Erie | PA | — | ◇ UNVERIFIED |
| DCDiadochi Capital LLC | Lake Worth Beach | FL | — | ◇ UNVERIFIED |
| DWDiamond Welding INC | Honolulu | HI | — | ◇ UNVERIFIED |
| DRDiaz Roofing and Sheet Metal | Violet | LA | — | ◇ UNVERIFIED |
| DIDi-cor Industries, INC. | Bristol | CT | — | ◇ UNVERIFIED |
| DSDie Stampco INC | Bay City | MI | — | ◇ UNVERIFIED |
| DPDi Primo Fabricators INC - Watson Industrial Park | Saint Louis | MO | — | ◇ UNVERIFIED |
| DSDirect Source Supply INC. | Mamaroneck | NY | — | ◇ UNVERIFIED |
| DIDiscount Iron Fence & Gate, INC. | Cerritos | CA | — | ◇ UNVERIFIED |
| DIDistinctive Iron LLC | Elk River | MN | — | ◇ UNVERIFIED |
| DWdiverse welding & fabrication | Gordonville | PA | — | ◇ UNVERIFIED |
| DHDiversified Holdings of Dallas, INC. | Dallas | NC | — | ◇ UNVERIFIED |
| DMDiversified Metal Products, INC | Idaho Falls | ID | — | ◇ UNVERIFIED |
| DSDiversified Steel Fabricators, INC. | Montgomery | AL | — | ◇ UNVERIFIED |
| D5Division 5 Florida, INC. | Starke | FL | — | ◇ UNVERIFIED |
| D5Division 5, INC. | Winston | GA | — | ◇ UNVERIFIED |
| DVDivision V Sheetmetal INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| DMDixie Machine LLC | Holly | MI | — | ◇ UNVERIFIED |
| DEDjb Enterprises LTD. | Phoenix | AZ | — | ◇ UNVERIFIED |
| DLD & L Fabricating, INC. | Phoenix | AZ | — | ◇ UNVERIFIED |
| DLD & L Ornamental Iron | Chanute | KS | — | ◇ UNVERIFIED |
| DGDLT Group, Inc. | Highland | MI | — | ◇ UNVERIFIED |
| DEDmc Enterprises | La Vergne | TN | — | ◇ UNVERIFIED |
| DMD & M Iron Works INC | Roseville | MN | — | ◇ UNVERIFIED |
| DMD.m. Manufacturing, INC. | Beloit | WI | — | ◇ UNVERIFIED |
| DSD.m.s. Shredding, INC. | Hanover Township | PA | — | ◇ UNVERIFIED |
| DADo All Industries USA LTD | Glenburn | ND | — | ◇ UNVERIFIED |
| DSDogan Steel, INC. | Northport | AL | — | ◇ UNVERIFIED |
| DFDog Fabrication and Design LLC | Mooresville | NC | — | ◇ UNVERIFIED |
| DSDoing Steel, INC. | Stillwater | OK | — | ◇ UNVERIFIED |
| DFDonald F. Deaven INC. | Newark | DE | — | ◇ UNVERIFIED |
| DFDonald F. Deaven INC. | Wilmington | DE | — | ◇ UNVERIFIED |
| DFDonald F. Deaven, INC. | Middletown | DE | — | ◇ UNVERIFIED |
| DLDonald L Farmer INC Dba Farmers Tractor & Equipment CO. | Porterville | CA | — | ◇ UNVERIFIED |
| DWDonald W Ramos | Albuquerque | NM | — | ◇ UNVERIFIED |
| DTDon't Trip Enterprises | Signal Hill | CA | — | ◇ UNVERIFIED |
| DSDose Steelworks, Inc | Story City | IA | — | ◇ UNVERIFIED |
| DSDothan Steel Fabricators LLC | Dothan | AL | — | ◇ UNVERIFIED |
