| CMCt Metal Structures, LLC | Farmington | CT | — | ◇ UNVERIFIED |
| CCCtp Corporation Aka Commercial Tube Processing | Indianapolis | IN | — | ◇ UNVERIFIED |
| CGCumberland Grills INC Dba Knox Engineering INC | Knoxville | TN | — | ◇ UNVERIFIED |
| CBCustom Blast Services Nederland | Nederland | TX | — | ◇ UNVERIFIED |
 Custom Design & Manufacturing | Carrollton | MI | — | ◇ UNVERIFIED |
| CJCustom Job Shop, LLC. | Topeka | KS | — | ◇ UNVERIFIED |
| CMCustom Machining INC | Mount Sterling | KY | — | ◇ UNVERIFIED |
 Custom Marine Components, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| CMCustom Metal Works, INC. | Rincon | GA | — | ◇ UNVERIFIED |
| CMCustom Molded Products | Phoenix | AZ | — | ◇ UNVERIFIED |
| CPCustom Pipe & Coupling CO INC | Woodburn | OR | — | ◇ UNVERIFIED |
| CPCustom Pipe & Coupling Co., INC. | Fresno | CA | — | ◇ UNVERIFIED |
| CPCustom Pipe & Coupling Co., INC. | Lubbock | TX | — | ◇ UNVERIFIED |
 Custom Products of Litchfield INC | Litchfield | MN | — | ◇ UNVERIFIED |
| CTCustom Tool & Design Company INC | Huntingdon | TN | — | ◇ UNVERIFIED |
| CMCutters Machine Tool INC | Lexington | TN | — | ◇ UNVERIFIED |
| CECutting Edge Manufacturing, INC. | Nampa | ID | — | ◇ UNVERIFIED |
| CECutting Edge Plasma LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| CICyclops Iron Works | Mamaroneck | NY | — | ◇ UNVERIFIED |
| CFCypress Fabrication Services, L.L.C. | St Martinville | LA | — | ◇ UNVERIFIED |
| CCytiva | Westborough | MA | — | ◇ UNVERIFIED |
| CTCzech Tool, INC. | Saegertown | PA | — | ◇ UNVERIFIED |
| DLD2h, LLC | Salem | OR | — | ◇ UNVERIFIED |
| DEDa Eun Pacific | Tamuning | GU | — | ◇ UNVERIFIED |
| DBDale Brisco INC. | Fowler | CA | — | ◇ UNVERIFIED |
| DMDal Machine INC | Otsego | MN | — | ◇ UNVERIFIED |
| DEDane Engineering INC | Brainerd | MN | — | ◇ UNVERIFIED |
| DKDaniel Kirsch | Woodburn | OR | — | ◇ UNVERIFIED |
| DEDanson Enterprises, LLC | Fort Collins | CO | — | ◇ UNVERIFIED |
| DFDarchuks Fabrication and Stainless Steel Works INC | Park Rapids | MN | — | ◇ UNVERIFIED |
| DMDarling Manufacturing CO. | Pender | NE | — | ◇ UNVERIFIED |
| DLDaspit, LLC | Saint Bernard | LA | — | ◇ UNVERIFIED |
| DTDau Thermal Solutions NA | Macedon | NY | — | ◇ UNVERIFIED |
| DFDave's Flow Measurement, LLC | Fort Collins | CO | — | ◇ UNVERIFIED |
| DPDavidson Pipe Supply CO INC | Brooklyn | NY | — | ◇ UNVERIFIED |
| DWDavid Whitlow | Adamsville | TN | — | ◇ UNVERIFIED |
| DMDavis Metal & Powder Coating, LLC | Port Clinton | OH | — | ◇ UNVERIFIED |
| DIDayani Investments LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| DFD&b Fabrication Plus, INC. | Riverside | CA | — | ◇ UNVERIFIED |
| DMD&C Machine LLC | Mechanicsburg | PA | — | ◇ UNVERIFIED |
| DRDDB Real Estate, LLC | Tifton | GA | — | ◇ UNVERIFIED |
| DMDdssaa Mfg., LLC | Salisbury | NC | — | ◇ UNVERIFIED |
| DIDeacon Industrial Supply Co., INC. | Harleysville | PA | — | ◇ UNVERIFIED |
| DMDecker Machine Works, INC | Ashfield | MA | — | ◇ UNVERIFIED |
| DIDelta Industrial Dba Delta Modtech | Ramsey | MN | — | ◇ UNVERIFIED |
| DPDelta Pattern, INC. | South Gate | CA | — | ◇ UNVERIFIED |
| DTDelta Trailer, INC. | Houston | TX | — | ◇ UNVERIFIED |
| DDero/everlast | Fridley | MN | — | ◇ UNVERIFIED |
| DPDesert Plastering L.l.c. | North Las Vegas | NV | — | ◇ UNVERIFIED |
| DSDesigner Sinks | Hanover | MA | — | ◇ UNVERIFIED |
| DSDesign Shapes in Steel | South El Monte | CA | — | ◇ UNVERIFIED |
| DMDesignTech Manufacturing LLC | Stanley | WI | — | ◇ UNVERIFIED |
| DTDetroit Tube Products LLC | Detroit | MI | — | ◇ UNVERIFIED |
| DTDetroit Tubing Mill INC | Detroit | MI | — | ◇ UNVERIFIED |
| DMDexter Magnetic Materials Division | Richardson | TX | — | ◇ UNVERIFIED |
| DTDh Technology INC | San Jose | CA | — | ◇ UNVERIFIED |
| DCDiameters Corporation | Chicago Heights | IL | — | ◇ UNVERIFIED |
| DDiamodent | Anaheim | CA | — | ◇ UNVERIFIED |
 Diamondback Manufacturing LLC | Orem | UT | — | ◇ UNVERIFIED |
| DEDiamond Environmental Services LP | Banning | CA | — | ◇ UNVERIFIED |
| DIDiamond Industries, INC. | Milwaukee | WI | — | ◇ UNVERIFIED |
| DMDiamond Manufacturing CORP C/o | San Leandro | CA | — | ◇ UNVERIFIED |
| DMDiamond Metals Distribution INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| DWDiamond Wire Spring Company | Tyler | TX | — | ◇ UNVERIFIED |
| DMDice Mold & Engineering, INC. | Itasca | IL | — | ◇ UNVERIFIED |
| DDDig Dog LLC | Costa Mesa | CA | — | ◇ UNVERIFIED |
| DHDi Highway Sign & Structure Corporation | New York Mills | NY | — | ◇ UNVERIFIED |
| DLDik & Lu 2365 LLC | Denver | CO | — | ◇ UNVERIFIED |
| DFDill Fabrication Company, Inc. | Greenville | SC | — | ◇ UNVERIFIED |
| DLDiMax, LLC | Temecula | CA | — | ◇ UNVERIFIED |
| DMDimensional Machine Works LLC | Houston | TX | — | ◇ UNVERIFIED |
| DIDirtBound Inc. | Center City | MN | — | ◇ UNVERIFIED |
| DNDistribution Now | Carson | CA | — | ◇ UNVERIFIED |
| DMDittrich Mechanical - Fabrication INC | Mankato | MN | — | ◇ UNVERIFIED |
| DIDiversico Industries, INC. | Minneapolis | MN | — | ◇ UNVERIFIED |
| DFDiversified Fabrication & Accessories LLC | Sebring | FL | — | ◇ UNVERIFIED |
| DPDiversified Products INC | Bend | OR | — | ◇ UNVERIFIED |
| DWDiversified Welding Works INC | Vancouver | WA | — | ◇ UNVERIFIED |
| D5Division 5 | Winston Salem | NC | — | ◇ UNVERIFIED |
| DMDixie Marketing and Playground Equipment, INC. | Falkville | AL | — | ◇ UNVERIFIED |
| DMDixie Metal Products LLC | Memphis | TN | — | ◇ UNVERIFIED |
| DTDixie Trailer and Truck Equipment | Ashland | VA | — | ◇ UNVERIFIED |
| DLDMK Lapidary, L.L.C. | Waterville | MN | — | ◇ UNVERIFIED |
| DMDms Machinery & Fabrication | Groveton | NH | — | ◇ UNVERIFIED |
| DBD&n Bending CORP. | Romeo | MI | — | ◇ UNVERIFIED |
| DMDoll Marine Metal Fabrication, INC. | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| DMDoneright Metal Works | Beloit | WI | — | ◇ UNVERIFIED |
| DCDonna C. Pursell | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| DIDonnerite INC | New London | MN | — | ◇ UNVERIFIED |
| DDDouble Diamond HCI LLC | Cheyenne | WY | — | ◇ UNVERIFIED |
 D.p. Industries, INC. | Placeholder | CA | — | ◇ UNVERIFIED |
| DMDpr Machine Shop INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| DMDraco MFG. Inc. | Davisburg | MI | — | ◇ UNVERIFIED |
| DPDragon Products, Limited Partnership | Lathrop | CA | — | ◇ UNVERIFIED |
| DLDrei, LLC | Nampa | ID | — | ◇ UNVERIFIED |
| DFDriven Fabrication LLC. | White Lake | MI | — | ◇ UNVERIFIED |
| DPDriven Performance | Fresno | CA | — | ◇ UNVERIFIED |
| DMDs Manufacturing INC | Pine Island | MN | — | ◇ UNVERIFIED |
| DSD & S Metal Designs INC | Sherwood | OR | — | ◇ UNVERIFIED |
| DPD-s Pipe & Steel Supply, LLC | Baltimore | MD | — | ◇ UNVERIFIED |
