| CMCk Manufacturing, LLC | Lancaster | PA | — | ◇ UNVERIFIED |
| COClarence Ornamental Works & Welding Services, LLC | Destrehan | LA | — | ◇ UNVERIFIED |
| CSCmc Steel Us, Llc, Martinsburg | Martinsburg | WV | — | ◇ UNVERIFIED |
| CFCode Fabrication INC | West Valley City | UT | — | ◇ UNVERIFIED |
| CFCold Finished Stainless | Houston | TX | — | ◇ UNVERIFIED |
| CRCombustion Resources, LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| CIConnaughty Industries INC | Rushford | MN | — | ◇ UNVERIFIED |
| CMConsolidated Metals INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| CHConstruction Hotline and Management Partners, INC. | Santa Ana | CA | — | ◇ UNVERIFIED |
| CCContech Const Prod - Greencastle | Greencastle | PA | — | ◇ UNVERIFIED |
 Contech Engineered Solutions, LLC | Englewood | TN | — | ◇ UNVERIFIED |
| CSContinental Steel Corporation | Salt Lake City | UT | — | ◇ UNVERIFIED |
| CDControl Devices | Fenton | MO | — | ◇ UNVERIFIED |
| CICooksey Iron & Metal Company, INC. | Midville | GA | — | ◇ UNVERIFIED |
| CSCooksey Steel Company, INC. | Tifton | GA | — | ◇ UNVERIFIED |
| CSCooper Standard Automotive INC | New Lexington | OH | — | ◇ UNVERIFIED |
| CCCopperweld Chicago Division | Chicago | IL | — | ◇ UNVERIFIED |
| CSCopperweld - Stainless Div | Elizabethtown | KY | — | ◇ UNVERIFIED |
| CTCreative Tubes | Jacksboro | TN | — | ◇ UNVERIFIED |
| CFCrl Fab, LLC | Fort Myers | FL | — | ◇ UNVERIFIED |
| CICrucible INC Trent Tube Div Plt 1 | East Troy | WI | — | ◇ UNVERIFIED |
| CMCrucible Materials CORP Trent Tube Plants 1,3 | East Troy | WI | — | ◇ UNVERIFIED |
| CHCsr Hydro Conduit | Corona | CA | — | ◇ UNVERIFIED |
| CFCT&C Fab LLC | Erda | UT | — | ◇ UNVERIFIED |
| CWCTS Welding LLC | Bloomingdale | MI | — | ◇ UNVERIFIED |
| CWCTS Welding LLC | Bloomingdale | MI | — | ◇ UNVERIFIED |
| CICustom Ii Metal Fabrication and Welding | Bozeman | MT | — | ◇ UNVERIFIED |
| DBDamascus Bishop Tube/greenville | Greenville | PA | — | ◇ UNVERIFIED |
| DPDelsea Pipe INC. | Sewell | NJ | — | ◇ UNVERIFIED |
| DEDema Engineering CO | Saint Louis | MO | — | ◇ UNVERIFIED |
| DTDetroit Tube Products LLC | Detroit | MI | — | ◇ UNVERIFIED |
| DWDetroit Welded Tube | Detroit | MI | — | ◇ UNVERIFIED |
| DMDiversified Metalworking, Inc. | Republic | MO | — | ◇ UNVERIFIED |
| DMDiversified Metalworking, Inc. | Republic | MO | — | ◇ UNVERIFIED |
| DMDiversified Metalworking, Inc. | Republic | MO | — | ◇ UNVERIFIED |
| DIDmcg, INC. | Norcross | GA | — | ◇ UNVERIFIED |
| DSDubose Steel CORP. | Roseboro | NC | — | ◇ UNVERIFIED |
| EMEagle Manufacturing Company, INC. | Colchester | CT | — | ◇ UNVERIFIED |
| EAE and H Tubing | Brownstown | IN | — | ◇ UNVERIFIED |
| ETEast Texas Radiator | Longview | TX | — | ◇ UNVERIFIED |
| ESEbenezer Steel | Phelan | CA | — | ◇ UNVERIFIED |
| EPEb Pipe Coating INC | Panama City | FL | — | ◇ UNVERIFIED |
| EHE & H Tubing Incorporated | Salem | IN | — | ◇ UNVERIFIED |
| ETE-h Tubing Incorporated | Brownstown | IN | — | ◇ UNVERIFIED |
| ECEl Campo Machine & Repair, INC. | El Campo | TX | — | ◇ UNVERIFIED |
| EIElectrolurgymfg. INC. | Santa Ana | CA | — | ◇ UNVERIFIED |
| ESElite Storage Solutions, LLC | Monroe | GA | — | ◇ UNVERIFIED |
| EWElite Workforce Management | Little Rock | AR | — | ◇ UNVERIFIED |
| EMEmet Manufacturing, INC. | Warren | MI | — | ◇ UNVERIFIED |
 Energy Steel & Supply CO | Lapeer | MI | — | ◇ UNVERIFIED |
