| TCTimkensteel Corporation | Canton | OH | — | ◇ UNVERIFIED |
| TWTi Wire | Etiwanda | CA | — | ◇ UNVERIFIED |
| TWTi Wire | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| TITmk Ipsco | Brookfield | OH | — | ◇ UNVERIFIED |
| TWTodd's Welding INC. | Fruita | CO | — | ◇ UNVERIFIED |
| TUTokusen USA Incorporated | Little York | IN | — | ◇ UNVERIFIED |
| TSTorpedo Specialty Wire | Pittsfield | PA | — | ◇ UNVERIFIED |
| TFTrans-tex Fabricating CO. INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| TITree Island Wire | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| TSTriangle Suspension Sys | Punxsutawney | PA | — | ◇ UNVERIFIED |
| TPTrinity Products, LLC | O Fallon | MO | — | ◇ UNVERIFIED |
| TDTri-vet Design and Fabrication, LLC | Shenandoah | PA | — | ◇ UNVERIFIED |
 Truenorth Steel | Billings | MT | — | ◇ UNVERIFIED |
| TCTube City Ims LLC | Portage | IN | — | ◇ UNVERIFIED |
| TETvek Enterprises, INC. | Mingo Junction | OH | — | ◇ UNVERIFIED |
| USUlbrich Stainless Steels & Specialty Metals, INC. | Lagrange | GA | — | ◇ UNVERIFIED |
| UUUltra USA INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| UAUnited Alloys INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| USUnited Site Services Springfield Ma | Indian Orchard | MA | — | ◇ UNVERIFIED |
| USUnited Slings & Lifting, INC. | Tecumseh | OK | — | ◇ UNVERIFIED |
| USUnited States Steel Corporation | Worcester | MA | — | ◇ UNVERIFIED |
| UTUnited Tube Corparation | Medina | OH | — | ◇ UNVERIFIED |
| URUnitrac Railroad Materials INC. | Knoxville | TN | — | ◇ UNVERIFIED |
| UMUniversal Machine Company INC | Paramount | CA | — | ◇ UNVERIFIED |
 Universal Stainless & Alloy Products INC. | North Jackson | OH | — | ◇ UNVERIFIED |
| UWUSA Waste (monroeville Landfill) | Monroeville | PA | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Mcallen | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - Jacksonville | Jacksonville | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Calvert | AL | — | ◇ UNVERIFIED |
| USU. S. Pipe | Lynchburg | VA | — | ◇ UNVERIFIED |
| UPUS Pipe Fabrication, LLC | Ocala | FL | — | ◇ UNVERIFIED |
| UCUss Central Teaming Company INC | Gary | IN | — | ◇ UNVERIFIED |
| USUS Steel CORP Joliet Works | Joliet | IL | — | ◇ UNVERIFIED |
| USU.s. Steel Corporation | Fairless Hills | PA | — | ◇ UNVERIFIED |
| USUS Steel East Chicago | East Chicago | IN | — | ◇ UNVERIFIED |
| USUS Steel - Gary Works | Chicago | IL | — | ◇ UNVERIFIED |
| VDValley Die Castings, INC. | Mcallen | TX | — | ◇ UNVERIFIED |
| VMVanguard Manufacturing INC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| VCViking Consolidated Services, Inc. | Niagara Falls | NY | — | ◇ UNVERIFIED |
| VLViktor's Legacy Custom Gunsmithing | Fairport | OH | — | ◇ UNVERIFIED |
| VSVinton Steel, LLC | Vinton | TX | — | ◇ UNVERIFIED |
| VTVoestalpine Texas LLC | Portland | TX | — | ◇ UNVERIFIED |
| VCVoss Clark D/b/a Pgp CORP | Jeffersonville | IN | — | ◇ UNVERIFIED |
| VIVoss Industries-voss Taylor Div | Taylor | MI | — | ◇ UNVERIFIED |
| VVVSP Ventures Inc. | Jackson | MI | — | ◇ UNVERIFIED |
| WWWalker Wire & Steel CO | Pontiac | IL | — | ◇ UNVERIFIED |
| WSWarren Steel Holdings LLC | Warren | OH | — | ◇ UNVERIFIED |
| WSWarren Steel Holdings, LLC (0278080015) | Warren | OH | — | ◇ UNVERIFIED |
| WWWayne Wire Cloth Prod | Kalkaska | MI | — | ◇ UNVERIFIED |
| WAWeave Alloy Products Company | Sterling Heights | MI | — | ◇ UNVERIFIED |
