| SWService Wire-phoenix | Phoenix | AZ | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| SCShalmet CORP | Elyria | OH | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| SASignature Alum INC - Greenville Facility | Greenville | PA | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
Skyline Steel LLC. - Geo Pomona | Pomona | CA | Primary Metal Manufacturing331210 | 1-19 | ◐ LIKELY ACTIVE |
| SVSloan Valve CO - Augusta Division | Augusta | AR | Primary Metal Manufacturing331529 | — | ◐ LIKELY ACTIVE |
| SSSmelter Service CORP | Mount Pleasant | TN | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| SSSmi Steel-arkansas | Magnolia | AR | Primary Metal Manufacturing331100 | — | ◐ LIKELY ACTIVE |
| SSSmi Steel LLC | Birmingham | AL | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| SMSoudan Metals Company INC. | Chicago | IL | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| SCSoutheast Culvert INC. | Winder | GA | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| SMSpecial Metals Dunkirk | Dunkirk | NY | Primary Metal Manufacturing331419 | 20-99 | ◐ LIKELY ACTIVE |
| SCSpectrulite Consortium Incorporated | Madison | IL | Primary Metal Manufacturing331315 | — | ◐ LIKELY ACTIVE |
| SDSteel Dynamics Incorporated | Butler | IN | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| SDSteel Dynamics Southwest - Sinton Division | Sinton | TX | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| SDSteel Dynamics Structural | Columbia City | IN | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| STSteel Technologies LLC | Smyrna | TN | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| SWSteel Warehouse of Ohio LLC | Cleveland | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| SWSteel Warehouse of Ohio LLC | Cleveland | OH | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| SASteward Advanced Materials LLC | Chattanooga | TN | Nonmetallic Mineral Product Manufacturing327999 | 20-99 | ◐ LIKELY ACTIVE |
| SKStryten Kcmo LLC | Kansas City | MO | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| SRSturm Ruger Firearms Manufacturing Facility | Newport | NH | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| SWSumiden Wire Products | Stockton | CA | Primary Metal Manufacturing331222 | 20-99 | ◐ LIKELY ACTIVE |
| SISwva INC | Huntington | WV | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| SFSystems Fab & Machine, INC. | El Dorado | AR | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| TMTalley Metals Technology | Mcbee | SC | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| TTTapco Tube Co/meadville | Meadville | PA | Primary Metal Manufacturing331210 | — | ◐ LIKELY ACTIVE |
| TTTarter Tube | Dunnville | KY | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| TFTaylor & Fenn CO | Windsor | CT | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| TFTaylor Foundry | Wichita Falls | TX | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| TMTazewell Machine Works INC | Pekin | IL | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| TTTci Texarkana, INC | Texarkana | TX | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| TDT & D Metal Products | Watseka | IL | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| TITdy Industries LLC - Ati Firth Sterling | Huntsville | AL | Primary Metal Manufacturing331221 | — | ◐ LIKELY ACTIVE |
| TCTechalloy CO INC | Union | IL | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| TCTech Cast LLC | Myerstown | PA | Primary Metal Manufacturing331512 | — | ◐ LIKELY ACTIVE |
| TBTenaris Bay City | Bay City | TX | Primary Metal Manufacturing331210 | 500+ | ◐ LIKELY ACTIVE |
| TITesla, INC. | Fremont | CA | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| TFTexaloy Foundry | Floresville | TX | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| TCTextron Cwc Division | Muskegon | MI | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| TDThe Doe Run Company Buick Resource Recycling Facility | Boss | MO | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| TEThe Esab Group, INC. | Hanover | PA | Primary Metal Manufacturing331491 | — | ◐ LIKELY ACTIVE |
| TGThe Gill Corporation - Maryland | Edgewood | MD | Primary Metal Manufacturing331316 | — | ◐ LIKELY ACTIVE |
| TTThe Troxel Company | Moscow | TN | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| TGThompson Gundrilling INC | Van Nuys | CA | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| TATifton Aluminum CO INC | Tifton | GA | Primary Metal Manufacturing331314 | — | ◐ LIKELY ACTIVE |
| TMTitanium Metals CORP Dba Timet | Morgantown | PA | Primary Metal Manufacturing331410 | — | ◐ LIKELY ACTIVE |
| TETower Extrusions LTD | Olney | TX | Primary Metal Manufacturing331314 | 100-499 | ◐ LIKELY ACTIVE |
| TMToyota Motor Manufacturing Tennessee | Jackson | TN | Primary Metal Manufacturing331521 | — | ◐ LIKELY ACTIVE |
| TFTpr Federal-mogul Tennessee, INC | Lawrenceburg | TN | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| TFTrinity Fabricators INC | Green Cove Springs | FL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |