| CNCmi New Castle Facility | New Castle | PA | — | ◇ UNVERIFIED |
| CACnh America LLC | Belleville | PA | — | ◇ UNVERIFIED |
| CACnh Amer LLC - Belleville Facility | Belleville | PA | — | ◇ UNVERIFIED |
| CICoastal Industrial Fabrication | Theodore | AL | — | ◇ UNVERIFIED |
| CICoast Iron & Steel CO | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| CWCo-line Welding INC | Sully | IA | — | ◇ UNVERIFIED |
| CCCollision Care at Mosers | Glenside | PA | — | ◇ UNVERIFIED |
| CBColorado Bridge & Iron INC | Fruita | CO | — | ◇ UNVERIFIED |
| CSColumbia Steel INC | Rialto | CA | — | ◇ UNVERIFIED |
| CFCommercial Fabricators | Bridgeview | IL | — | ◇ UNVERIFIED |
| CMCommercial Metals Company | San Bernardino | CA | — | ◇ UNVERIFIED |
| CMCommercial Metals Company | Nashville | TN | — | ◇ UNVERIFIED |
| CMCommercial Metals Company | Louisville | KY | — | ◇ UNVERIFIED |
| CECommscope, Euless Facility | Euless | TX | — | ◇ UNVERIFIED |
| CEConsolidated Equipment Group | Fosston | MN | — | ◇ UNVERIFIED |
| CAConstruction Attachments, INC. | Lenoir | NC | — | ◇ UNVERIFIED |
| CMContainer Management Services | Portland | OR | — | ◇ UNVERIFIED |
| CBContinental Bridge | Alexandria | MN | — | ◇ UNVERIFIED |
| CConxtech | Woodland | CA | — | ◇ UNVERIFIED |
| CIConxtech INC | Hayward | CA | — | ◇ UNVERIFIED |
| CTCook Tractor Parts INC 351 Rd | Clinton | MO | — | ◇ UNVERIFIED |
| CBCooper B-line INC | Troy | IL | — | ◇ UNVERIFIED |
| CBCooper B-line INC | Sherman | TX | — | ◇ UNVERIFIED |
| CSCooper's Steel Fabricators | Shelbyville | TN | — | ◇ UNVERIFIED |
| CCowelco | Long Beach | CA | — | ◇ UNVERIFIED |
| CDCox Design & Metal Fabrication INC | Altoona | IA | — | ◇ UNVERIFIED |
| CDCreative Display Panels | Newbury Park | CA | — | ◇ UNVERIFIED |
| CICreativison, INC. Dba Performance Display & Millwork | Grimes | IA | — | ◇ UNVERIFIED |
| CLCr Laurence CO INC | Vernon | CA | — | ◇ UNVERIFIED |
| CRC & R Sales Inc/dba Kretzschmar Steel | Colton | CA | — | ◇ UNVERIFIED |
| CMCrystal Metalworks | Hatfield | PA | — | ◇ UNVERIFIED |
| CSCrystal Steel Memphis, LLC | Gallaway | TN | — | ◇ UNVERIFIED |
| CCCst Covers | Conroe | TX | — | ◇ UNVERIFIED |
| CMCustom Metal Fabricators INC | Richmond | VA | — | ◇ UNVERIFIED |
| CFC&w Fabricators | Gardner | MA | — | ◇ UNVERIFIED |
| DDDana Driveshaft Manufacturing LLC | Sterling | IL | — | ◇ UNVERIFIED |
| DSDana Sealing Products, LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| DADanos and Curole Marine Contractors, LLC | Larose | LA | — | ◇ UNVERIFIED |
| DMDanuser Machine Company LLC | Fulton | MO | — | ◇ UNVERIFIED |
| DMDanuser Machine Company LLC | Fulton | MO | — | ◇ UNVERIFIED |
| DSDanville Steel | Danville | IL | — | ◇ UNVERIFIED |
| DBDavis Boat Works INC | Newport News | VA | — | ◇ UNVERIFIED |
| DIDavis Iron Works Operations | Hewitt | TX | — | ◇ UNVERIFIED |
| DTDavis Trailer & Truck Equipment | Little Rock | AR | — | ◇ UNVERIFIED |
| DEDawn Equipment CO | Sycamore | IL | — | ◇ UNVERIFIED |
 Dayton Superior Corporation | Birmingham | AL | — | ◇ UNVERIFIED |
| DSDelta Steel Company INC | Jackson | MS | — | ◇ UNVERIFIED |
| DIDempster Industries | Beatrice | NE | — | ◇ UNVERIFIED |
| DWDerby Welding and Machine Co., INC. | Louisville | KY | — | ◇ UNVERIFIED |
| DCD-g Custom Chrome LLC | Cincinnati | OH | — | ◇ UNVERIFIED |
| DIDiebold INC | Sumter | SC | — | ◇ UNVERIFIED |
| DDDillon Decanter & Machine INC | Eleanor | WV | — | ◇ UNVERIFIED |
| DIDiversified Industries INC | Troutville | VA | — | ◇ UNVERIFIED |
| DSDiversified Steel Fabricators, INC. | Wetumpka | AL | — | ◇ UNVERIFIED |
| D5Division 5, LLC (dba Structural Steel of Carolina) | Hickory | NC | — | ◇ UNVERIFIED |
| DSDixie Southern Industrial INC | Auburndale | FL | — | ◇ UNVERIFIED |
| DTDixie Tractor | Princeton | WV | — | ◇ UNVERIFIED |
| DJD & J Metal Products, INC. | Memphis | TN | — | ◇ UNVERIFIED |
| DEDomries Enterprises INC. | Madera | CA | — | ◇ UNVERIFIED |
| DCDonahue CORP | Durham | KS | — | ◇ UNVERIFIED |
| DDonaldson | Grinnell | IA | — | ◇ UNVERIFIED |
| DEDoor Engineering & Manufacturing | Kasota | MN | — | ◇ UNVERIFIED |
| DBDs Brown\lewis Engineering Division | Chaska | MN | — | ◇ UNVERIFIED |
| DCDuvinge Corporation | Hagerstown | MD | — | ◇ UNVERIFIED |
| DEDynamic Enterprises INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| DIDynamic Industries INC | New Iberia | LA | — | ◇ UNVERIFIED |
| DIDynamic Industries INC - Lake Charles Facility | Lake Charles | LA | — | ◇ UNVERIFIED |
 Dynamic Industries - Topside West Yard | New Iberia | LA | — | ◇ UNVERIFIED |
| DODynamic Offshore Contractors INC | New Iberia | LA | — | ◇ UNVERIFIED |
| DWDynamic West Virginia - Site 1 | Morgantown | WV | — | ◇ UNVERIFIED |
| ESEaglespan Steel Structures | Fort Collins | CO | — | ◇ UNVERIFIED |
| ETEagle Tubular Products INC | Alton | IL | — | ◇ UNVERIFIED |
| EIEastpointe Industries | Muskogee | OK | — | ◇ UNVERIFIED |
| EIEckel Industries Noise Control Technologies | Cambridge | MA | — | ◇ UNVERIFIED |
| EFEdsco Fasteners | Denton | TX | — | ◇ UNVERIFIED |
| EOEdwards Ornamental Iron INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| EPEga Products INC | Brookfield | WI | — | ◇ UNVERIFIED |
| ESElm Solutions CORP | Seattle | WA | — | ◇ UNVERIFIED |
| EMEmats Manufacturing, LLC | Cedar Bluff | VA | — | ◇ UNVERIFIED |
| EFEmerson Fabrication Group LLC | Oneonta | AL | — | ◇ UNVERIFIED |
| EMEmerson Mfg / Dmd Mfg | Pender | NE | — | ◇ UNVERIFIED |
| EFEmmerson Fabrication Group LLC | Oneonta | AL | — | ◇ UNVERIFIED |
| ECEnerfab CORP | Cincinnati | OH | — | ◇ UNVERIFIED |
| EEEnglert Engineering Co* | Nashville | TN | — | ◇ UNVERIFIED |
| EIEnglish Ironworks INC. | Sarasota | FL | — | ◇ UNVERIFIED |
| EOEnsley Ornamental Iron Company INC | Birmingham | AL | — | ◇ UNVERIFIED |
| EIEnvirex, INC | Madison | IN | — | ◇ UNVERIFIED |
 Equipment Fabricators INC | Pell City | AL | — | ◇ UNVERIFIED |
| EFEta Fabrication, INC. | Avilla | IN | — | ◇ UNVERIFIED |
| EFExcel Fabrication INC. | Paramount | CA | — | ◇ UNVERIFIED |
| EMExpress Metal Fabricators Llc-st George Steel Division | Murray | UT | — | ◇ UNVERIFIED |
| ESExpress Scale Parts | Shawnee | KS | — | ◇ UNVERIFIED |
| FPFabricated Products of Tampa, INC. | Tampa | FL | — | ◇ UNVERIFIED |
| FCFactory Company International INC the | Spokane | WA | — | ◇ UNVERIFIED |
| FPFairlead Precision Manufacturing & Integration | Portsmouth | VA | — | ◇ UNVERIFIED |
| FOFair Oaks Manufacturing | Mccrory | AR | — | ◇ UNVERIFIED |
| FBFairway Bldg Products LLC | Hamilton Twp | NJ | — | ◇ UNVERIFIED |
| FWFair West Trailers | Hallettsville | TX | — | ◇ UNVERIFIED |
| FRFaith Regional Health Services | Norfolk | NE | — | ◇ UNVERIFIED |
| FWFansteel Washington Manufacturing | Washington | IA | — | ◇ UNVERIFIED |
