| TMTalley Metal Products | Hagerstown | MD | — | ◇ UNVERIFIED |
| TITamer Industries | Somerset | MA | — | ◇ UNVERIFIED |
| TATampa Amalgamated Steel | Tampa | FL | — | ◇ UNVERIFIED |
| TCTank Connection | Galesburg | KS | — | ◇ UNVERIFIED |
| TITate, INC. | Pocahontas | AR | — | ◇ UNVERIFIED |
| TFTaylor Forge Engineered Systems - Greeley | Garnett | KS | — | ◇ UNVERIFIED |
| TFTaylor Forge Engineered Systems - Paola | Paola | KS | — | ◇ UNVERIFIED |
| TMTexas Miscellaneous Iron | Oakwood | TX | — | ◇ UNVERIFIED |
| TGTextron Gse - Premier | Marinette | WI | — | ◇ UNVERIFIED |
| TCThe Canam Steel Corporation | Lafayette | IN | — | ◇ UNVERIFIED |
| THThe Hustad CO - Central Ave | Minneapolis | MN | — | ◇ UNVERIFIED |
| TIThe Industrial CO (tic) Se | Savannah | GA | — | ◇ UNVERIFIED |
| TQThieman Quality Metal Fabrication, INC. | New Bremen | OH | — | ◇ UNVERIFIED |
| TWThompsons Welding and Machine Works | Philadelphia | MS | — | ◇ UNVERIFIED |
| TRTier Rack Corporation, Como Plant | Como | MS | — | ◇ UNVERIFIED |
| TSTipton Structural Fabrication INC | Tipton | IA | — | ◇ UNVERIFIED |
| TFTitan Fabrication | Owensboro | KY | — | ◇ UNVERIFIED |
| TSTitan Steel CORP | Kirkville | NY | — | ◇ UNVERIFIED |
| TFTopeka Foundry and Ironworks CO | Topeka | KS | — | ◇ UNVERIFIED |
| TSTower Support Services LLC | Mckenzie | TN | — | ◇ UNVERIFIED |
| TTTower Tech | Abilene | TX | — | ◇ UNVERIFIED |
| TITramco INC. | Wichita | KS | — | ◇ UNVERIFIED |
| TMTramont Manufacturing LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| TTrcm | Maysville | KY | — | ◇ UNVERIFIED |
| TITrinity Industries | Elizabethtown | KY | — | ◇ UNVERIFIED |
| TITrinity Industries INC Plt 23 | Denton | TX | — | ◇ UNVERIFIED |
| TITrinity Industries Plant 127 Stearns Airport Equip | Fort Worth | TX | — | ◇ UNVERIFIED |
| TRTrinity Railcar Plant 192 | Saginaw | TX | — | ◇ UNVERIFIED |
| TSTriple S CORP | Beckley | WV | — | ◇ UNVERIFIED |
| TITri-state Ironworks INC | Memphis | TN | — | ◇ UNVERIFIED |
| TTrostel | Mcallen | TX | — | ◇ UNVERIFIED |
| TIT&w Industries Services | Folkston | GA | — | ◇ UNVERIFIED |
| UMUmi Metalfab | Menomonee Falls | WI | — | ◇ UNVERIFIED |
| USUnico Steel, INC. | City of Industry | CA | — | ◇ UNVERIFIED |
| UMUnion Metal - Canton | Canton | OH | — | ◇ UNVERIFIED |
| USUnited Steel Works, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| UFUniversal Fabricating & Construction Ser | Columbus | OH | — | ◇ UNVERIFIED |
| UIUpper Iowa University - Peacock Arts & Athletics Center | Fayette | IA | — | ◇ UNVERIFIED |
| UDUrgent Design and Mfg INC | Lapeer | MI | — | ◇ UNVERIFIED |
| ULUscoe Louisville Repair Sta | Louisville | KY | — | ◇ UNVERIFIED |
| UDU.s. Defense National Stockpile Center Point Pleasant Depot | Point Pleasant | WV | — | ◇ UNVERIFIED |
| UMUS Machine INC | Fairmont | WV | — | ◇ UNVERIFIED |
| USUsp Structural Connectors | Montgomery | MN | — | ◇ UNVERIFIED |
| VWValley West Welding CO INC | Waverly | TN | — | ◇ UNVERIFIED |
| VIValmont Industries INC | Tulsa | OK | — | ◇ UNVERIFIED |
| VNValmont Newmark | Hazleton | PA | — | ◇ UNVERIFIED |
| VFValmont-newmark Fab Shop | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| VValmont/texas | Brenham | TX | — | ◇ UNVERIFIED |
| VSVandellen Steel INC | Dutton | MI | — | ◇ UNVERIFIED |
| VFVan Fab INC | Union Hill | IL | — | ◇ UNVERIFIED |
 Van Linda Iron Works INC | Lake Worth | FL | — | ◇ UNVERIFIED |
| VMVaughn Manufacturing Corporation | Salisbury | MA | — | ◇ UNVERIFIED |
| VIVega Iron Works | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| VWVenture Welding (howe) | Howe | IN | — | ◇ UNVERIFIED |
| VCVirginia Carolina Steel Incorporated | Norfolk | VA | — | ◇ UNVERIFIED |
| VSVista Steel | Ventura | CA | — | ◇ UNVERIFIED |
| VSVoight & Schweitzer | Muskogee | OK | — | ◇ UNVERIFIED |
| VLVstructural LLC | Fort Worth | TX | — | ◇ UNVERIFIED |
| WFWalco Fabricating INC | Pottsville | PA | — | ◇ UNVERIFIED |
| WSWalker Station Equipment Company LLC | Tavares | FL | — | ◇ UNVERIFIED |
| WFWarren Fabricating & Machining CORP | Hubbard | OH | — | ◇ UNVERIFIED |
| WMWaste Management of Ohio | Cleveland | OH | — | ◇ UNVERIFIED |
| WBWatson Bowman Acme CORP | Buffalo | NY | — | ◇ UNVERIFIED |
| WCWest Coast Metal Finishing | Los Angeles | CA | — | ◇ UNVERIFIED |
| WFWest Facility - South Bearhead Creek Field | Fields | LA | — | ◇ UNVERIFIED |
| WVWest Virginia Steel CORP | Charleston | WV | — | ◇ UNVERIFIED |
| WCWhiskey Creek Farms | Lawton | IA | — | ◇ UNVERIFIED |
| WFWhite Fab INC | Birmingham | AL | — | ◇ UNVERIFIED |
| WWWildeck West Dba Ladder Industries | Goodyear | AZ | — | ◇ UNVERIFIED |
| WMWillerding Metal Fabrication INC | O Fallon | MO | — | ◇ UNVERIFIED |
| WBWilliams Bridge Company | Bessemer | AL | — | ◇ UNVERIFIED |
| WMWilliams Machine Works INC | Moss Point | MS | — | ◇ UNVERIFIED |
| WMWilliams Machine Works Inc, Facility Number 2 | Pascagoula | MS | — | ◇ UNVERIFIED |
| WWWilsonart - Wichita Kansas | Wichita | KS | — | ◇ UNVERIFIED |
| WEWilson Equipment Repair INC | Morgantown | WV | — | ◇ UNVERIFIED |
| WSWindsor Steel , INC | Elkhart | IN | — | ◇ UNVERIFIED |
| WIWirecrafters, INC. | Louisville | KY | — | ◇ UNVERIFIED |
| WMWoodbine Mfg CO | Woodbine | IA | — | ◇ UNVERIFIED |
| WGWood Group USA INC - Longmont Facility | Mead Area | CO | — | ◇ UNVERIFIED |
| WMWorld Marine of Mississippi, Llc, West | Pascagoula | MS | — | ◇ UNVERIFIED |
| WMWorthington Metal Fabricators, LLC Dba Sharon Stairs (1677011204) | Akron | OH | — | ◇ UNVERIFIED |
 W&w Afco Steel | Lubbock | TX | — | ◇ UNVERIFIED |
| XMXcite Manufacturing LLC Dba Richardson Metals INC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| YMYukon Mfg CO | Litchfield | MI | — | ◇ UNVERIFIED |
| ZCZuckerman CO INC | Winchester | VA | — | ◇ UNVERIFIED |
| 0L084 Lci | Nampa | ID | 20–99 | ◐ LIKELY ACTIVE |
| 0L085 Lci | Goshen | IN | 100–499 | ◐ LIKELY ACTIVE |
| 1T104658 - Tijuana River Barrier | San Diego | CA | 1–19 | ◐ LIKELY ACTIVE |
| 1S148 - Sayreville, NJ | Sayreville | NJ | 20–99 | ◐ LIKELY ACTIVE |
| 1F149 - Fryeburg, ME | Fryeburg | ME | 20–99 | ◐ LIKELY ACTIVE |
| 2F221 - Fort Myers, FL | Fort Myers | FL | 20–99 | ◐ LIKELY ACTIVE |
| 2T237 - Tampa, FL | Tampa | FL | 20–99 | ◐ LIKELY ACTIVE |
| 3I310 - IndianpolisOliver, IN (JSI) | Indianapolis | IN | 20–99 | ◐ LIKELY ACTIVE |
| 3W314 - Wyoming, MI (ERSCO) | Wyoming | MI | 1–19 | ◐ LIKELY ACTIVE |
| 3L315 - Lansing, MI (ERSCO) | Lansing | MI | 1–19 | ◐ LIKELY ACTIVE |
| 3C318 - Carlisle, PA (TRI-BORO) | Carlisle | PA | 20–99 | ◐ LIKELY ACTIVE |
| 3C399 - Columbus, OH (B&R) | Columbus | OH | 1–19 | ◐ LIKELY ACTIVE |
| 3U3 Up Metal Works LLC | Milwaukee | WI | — | ◐ LIKELY ACTIVE |
| 4F409 - Fort Myers, FL (SBP) | Fort Myers | FL | 1–19 | ◐ LIKELY ACTIVE |
| 4I44 Iron LLC | Eagle | ID | 20–99 | ◐ LIKELY ACTIVE |
