| CSColorado Steel & Wire CO | Loveland | CO | — | ◇ UNVERIFIED |
| CMCombined Metals CORP | Bellwood | IL | — | ◇ UNVERIFIED |
| CCometals | Cayce | SC | — | ◇ UNVERIFIED |
| CMCommercial Metals Company | Jacksonville | FL | — | ◇ UNVERIFIED |
| CMCommercial Metals Company | Etiwanda | CA | — | ◇ UNVERIFIED |
| CMCommercial Metals Company Rebar | San Antonio | TX | — | ◇ UNVERIFIED |
| CSCommercial Steel Corporation | Glassport | PA | — | ◇ UNVERIFIED |
| CFConsolidated Fabricators CORP | Vernon | CA | — | ◇ UNVERIFIED |
| CSConsolidated Steel Svc | Englewood | CO | — | ◇ UNVERIFIED |
| CMConstruction Materials, INC. | Montgomery | AL | — | ◇ UNVERIFIED |
| CSContinental Steel Works, INC. | Butte | MT | — | ◇ UNVERIFIED |
| CSContractors Steel Company | Belleville | MI | — | ◇ UNVERIFIED |
| CAControlled Automation | Bauxite | AR | — | ◇ UNVERIFIED |
| CMCoronado Manufacturing LLC | Sun Valley | CA | — | ◇ UNVERIFIED |
| CMCosmos Manufacturing, INC. | South Chicago Heights | IL | — | ◇ UNVERIFIED |
| CSCuenca Steel Corporation | Miami | FL | — | ◇ UNVERIFIED |
| CBCustom Bilt Metals LLC | Whittier | CA | — | ◇ UNVERIFIED |
| CSCustom Sheet & Metal Fabricators LLC | Chattanooga | TN | — | ◇ UNVERIFIED |
| CSCustom Steel Fabricators, INC. | Columbia | TN | — | ◇ UNVERIFIED |
| CSCustom Steel Processing, INC. | Granite City | IL | — | ◇ UNVERIFIED |
| COCycling on Two Wheels, LLC | Grovetown | GA | — | ◇ UNVERIFIED |
| DCDaiki Corporation | Adairsville | GA | — | ◇ UNVERIFIED |
 Dameron Alloy Foundries Dba Dafco INC | Louisville | KY | — | ◇ UNVERIFIED |
| DTDanaher Tool Group | Gastonia | NC | — | ◇ UNVERIFIED |
| DSDanick Specialties & Support, INC. | Niceville | FL | — | ◇ UNVERIFIED |
| DIDanmar Installation INC | Memphis | TN | — | ◇ UNVERIFIED |
| DRDayton Rogers Manufacturing company | Newberry | SC | — | ◇ UNVERIFIED |
| DRDayton Rogers of Ohio, Inc. | Obetz | OH | — | ◇ UNVERIFIED |
| DMDb Motoring Group, INC. | Miami | FL | — | ◇ UNVERIFIED |
| DDD & D Machine Works, INC. | Orem | UT | — | ◇ UNVERIFIED |
| DKDelaco Kasle Processing Indiana LLC | Jeffersonville | IN | — | ◇ UNVERIFIED |
| DFDelafield Fluid Technologies | Mabank | TX | — | ◇ UNVERIFIED |
| DIDelos Industries Inc. | Payson | UT | — | ◇ UNVERIFIED |
| DMDelta Metals Company, INC. | Memphis | TN | — | ◇ UNVERIFIED |
| DADesign Assistance Construction Systems INC | Sparrows Point | MD | — | ◇ UNVERIFIED |
| DSDetroit Steel CO Trenton | Trenton | MI | — | ◇ UNVERIFIED |
| DCDexmet Corporation - Naugatuck | Naugatuck | CT | — | ◇ UNVERIFIED |
| DMDexter Marine Products LLC | San Marcos | CA | — | ◇ UNVERIFIED |
| DSDfp Systems | El Cajon | CA | — | ◇ UNVERIFIED |
| DGD & G Fabrication and Pipe Supports | Theodore | AL | — | ◇ UNVERIFIED |
| DIDima Industries | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| DSDirect Sales INC. | Hollywood | FL | — | ◇ UNVERIFIED |
| DMDluhos Metal Works INC. | El Campo | TX | — | ◇ UNVERIFIED |
| DIDominguez Iron Work, Inc. | Miami | FL | — | ◇ UNVERIFIED |
| DIDominguez Iron Work, Inc. | Miami | FL | — | ◇ UNVERIFIED |
| DSDoral Steel, INC. | Toledo | OH | — | ◇ UNVERIFIED |
| DHDouglas-kent Holdings, LLC | Ontario | CA | — | ◇ UNVERIFIED |
| DSDouglas Steel Supply | Los Angeles | CA | — | ◇ UNVERIFIED |
| DCDow Corning Alabama, INC. | Mount Meigs | AL | — | ◇ UNVERIFIED |
| DMD&s Metal Solutions LLC | Gilbert | AZ | — | ◇ UNVERIFIED |
