| TPTrinity Products, INC. | Saint Charles | MO | — | ◇ UNVERIFIED |
| TPTrinity Products, LLC | O Fallon | MO | — | ◇ UNVERIFIED |
 Trinity Stainless INC. | Nixa | MO | — | ◇ UNVERIFIED |
| TSTri-state Steel of Nevada LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| TVTri Valley Iron INC. | Palisades | NY | — | ◇ UNVERIFIED |
 Truenorth Steel | Billings | MT | — | ◇ UNVERIFIED |
| TSTryad Service CORP. | Shafter | CA | — | ◇ UNVERIFIED |
| TUTubacex US Holding INC / Tubacex US Holding INC | Durant | OK | — | ◇ UNVERIFIED |
| TBTube Bending Specialists & Machinery, LLC | Hayward | CA | — | ◇ UNVERIFIED |
| TCTube City Ims LLC | Portage | IN | — | ◇ UNVERIFIED |
| TNTubetech North America, INC. | E Palestine | OH | — | ◇ UNVERIFIED |
| TSTuboscope Sheldon South Inspection Facility | Channelview | TX | — | ◇ UNVERIFIED |
| TPTubular Perforating Manufacturing of Conroe, LTD. | Conroe | TX | — | ◇ UNVERIFIED |
| TPTubular Processing Houston Operations | Houston | TX | — | ◇ UNVERIFIED |
| TPTubular Products Company, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| TSTubular Steel, INC. | Hazelwood | MO | — | ◇ UNVERIFIED |
| TSTubular Structures International, L.l.c | Mc Gregor | TX | — | ◇ UNVERIFIED |
| TPTurning Point Custom Machine LLC | De Pere | WI | — | ◇ UNVERIFIED |
| TETvek Enterprises, INC. | Mingo Junction | OH | — | ◇ UNVERIFIED |
| TMTy M. Wright | Portland | OR | — | ◇ UNVERIFIED |
| UHUltimate Highway Sales, INC. | Palos Heights | IL | — | ◇ UNVERIFIED |
| UUUltra USA INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| UEUnion Elec Steel Carnegie Plt | Carnegie | PA | — | ◇ UNVERIFIED |
| UTUnion Tube Mill LLC | Union City | IN | — | ◇ UNVERIFIED |
| UAUnited Alloys INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| UIUnited Industries | Selmer | TN | — | ◇ UNVERIFIED |
| UPUnited Pipe & Steel | Stockton | CA | — | ◇ UNVERIFIED |
| USUnited Spiral Pipe LLC Manufacturing Plan | Pittsburg | CA | — | ◇ UNVERIFIED |
| USUnited Stars INC | Beloit | WI | — | ◇ UNVERIFIED |
| USUnited States Steel Corporation | Worcester | MA | — | ◇ UNVERIFIED |
| UTUnited Tube Corparation | Medina | OH | — | ◇ UNVERIFIED |
| URUnitrac Railroad Materials INC. | Knoxville | TN | — | ◇ UNVERIFIED |
| UTUnity Tube, Inc. | East Palestine | OH | — | ◇ UNVERIFIED |
| UFUniversal Fabrication, LLC | Kenner | LA | — | ◇ UNVERIFIED |
| UMUniversal Machine Company INC | Paramount | CA | — | ◇ UNVERIFIED |
 Universal Stainless & Alloy Products INC. | North Jackson | OH | — | ◇ UNVERIFIED |
| UTUniversal Tube | Rochester Hills | MI | — | ◇ UNVERIFIED |
| UWUSA Waste (monroeville Landfill) | Monroeville | PA | — | ◇ UNVERIFIED |
| UOUsdol Osha-atlanta East | Gainesville | GA | — | ◇ UNVERIFIED |
| UDU.s. Dol-osha Corpus Christi Area Office | Mcallen | TX | — | ◇ UNVERIFIED |
| UOUsdol Osha - (mobile) | Calvert | AL | — | ◇ UNVERIFIED |
| UIU.s. Industrial Piping, INC. | Kernersville | NC | — | ◇ 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 |
| USUS Steel - Lorain Tubular Operations | Lorain | OH | — | ◇ UNVERIFIED |
| USU.s. Steel Tubular Products | Houston | TX | — | ◇ UNVERIFIED |
| UIUsui International INC | Sharonville | OH | — | ◇ UNVERIFIED |
| VIVacuum Instrument CORP | Ronkonkoma | NY | — | ◇ UNVERIFIED |
| VDValley Die Castings, INC. | Mcallen | TX | — | ◇ UNVERIFIED |
| VVallourec | Youngstown | OH | — | ◇ UNVERIFIED |
| VAValue Added Processing Inc | East Pittsburgh | PA | — | ◇ UNVERIFIED |
| VFVans Fabricating INC. | De Pere | WI | — | ◇ UNVERIFIED |
| VCVell Company, INC. | Palisades | NY | — | ◇ UNVERIFIED |
| VSVescom Systems, LLC | Kearny | NJ | — | ◇ UNVERIFIED |
| VSVescom Systems, LLC | Bronxville | NY | — | ◇ 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 |
| WBWa317942603 - Bending Solutions Incorporated | Marysville | WA | — | ◇ UNVERIFIED |
| WWWalter Wire Edm Service* | Downers Grove | IL | — | ◇ UNVERIFIED |
| WFWarfield Fabrication LLC | Yoakum | TX | — | ◇ UNVERIFIED |
| WSWarren Steel Holdings LLC | Warren | OH | — | ◇ UNVERIFIED |
| WSWarren Steel Holdings, LLC (0278080015) | Warren | OH | — | ◇ UNVERIFIED |
 Webco Industries, INC. Keystone | Sand Springs | OK | — | ◇ UNVERIFIED |
| WIWebco Industries Texas Distribution Div | Orange | TX | — | ◇ UNVERIFIED |
| WEW E Hall CO | Eugene | OR | — | ◇ UNVERIFIED |
| WEW. E. Hall Company | Casa Grande | AZ | — | ◇ UNVERIFIED |
| WTWelded Tubes, INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| WFWelding Flux Facility | Niagara Falls | NY | — | ◇ UNVERIFIED |
| W6West 62nd Ave Holdings LLC | Denver | CO | — | ◇ UNVERIFIED |
| WTWestern Tube & Conduit CORP | Long Beach | CA | — | ◇ UNVERIFIED |
| WIWestfalia, INC | Bristol | CT | — | ◇ UNVERIFIED |
| WFWG Fabricators LLC | Vero Beach | FL | — | ◇ UNVERIFIED |
| WTWheatland Tube CO | Wheatland | PA | — | ◇ UNVERIFIED |
| WTWheatland Tube Co/clark St Plt | Sharon | PA | — | ◇ UNVERIFIED |
| WTWheatland Tube Council Ave Plt/wheatland Tube LLC | Wheatland | PA | — | ◇ UNVERIFIED |
| WTWheatland Tube, LLC. | Blytheville | AR | — | ◇ UNVERIFIED |
| WCWheeler Consolidated, INC. | Pinellas Park | FL | — | ◇ UNVERIFIED |
| WMWheeler Metals INC | Springfield | MO | — | ◇ UNVERIFIED |
| WFWheel Fix It Miami CORP. | Hialeah | FL | — | ◇ UNVERIFIED |
| WWhemco/midland | Midland | PA | — | ◇ UNVERIFIED |
| WLWhisler Land Company | Sacramento | CA | — | ◇ UNVERIFIED |
| WMWillcox Metal Fabricators, LLC | San Antonio | TX | — | ◇ UNVERIFIED |
| WGWilliam Grant Tank & Vessell | Henderson | TX | — | ◇ UNVERIFIED |
| WMWillscot Mobile Mini | Rialto | CA | — | ◇ UNVERIFIED |
| WSWilson Structural Steel, LLC | Fenton | MO | — | ◇ UNVERIFIED |
| WMWings Manufacturing Inc. | Mount Clemens | MI | — | ◇ UNVERIFIED |
| WMWisconsin Metal Tech, Inc. | Richfield | WI | — | ◇ UNVERIFIED |
| WMWisconsin Metal Tech, Inc. | Richfield | WI | — | ◇ UNVERIFIED |
 Wisconsin Oven CORP | East Troy | WI | — | ◇ UNVERIFIED |
| WIWoodside Investment INC Dba Michael & CO | Lockeford | CA | — | ◇ UNVERIFIED |
