| TCTube City Ims/slag Processing | Braddock | PA | — | ◇ UNVERIFIED |
| USUnited Stainless INC | Selmer | TN | — | ◇ UNVERIFIED |
| USUnited States Steel Corporationfairfield Pipe Mil | Fairfield | AL | — | ◇ UNVERIFIED |
| UDUS Denro Steels | Baytown | TX | — | ◇ UNVERIFIED |
| UPUS Pipe & Foundry CO | Bessemer | AL | — | ◇ UNVERIFIED |
| UCUss Corp/edgar Thomson Works | Braddock | PA | — | ◇ UNVERIFIED |
| UMUss Mon Valley Works - Irvin Plant | West Mifflin | PA | — | ◇ UNVERIFIED |
| USUS Steel Fairless Hills Works | Fairless Hills | PA | — | ◇ UNVERIFIED |
| VSVallourec Star LP / Muskogee Plt | Muskogee | OK | — | ◇ UNVERIFIED |
| VNValmont Newmark | Tulsa | OK | — | ◇ UNVERIFIED |
| VQVarco Quality Tubing Tuboscope Div | Houston | TX | — | ◇ UNVERIFIED |
| VSVast Sumitec INC | Benton Harbor | MI | — | ◇ UNVERIFIED |
| VIVest INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| VCVictaulic Company/alburtis Facility | Alburtis | PA | — | ◇ UNVERIFIED |
| VVoestalpine | Portland | TX | — | ◇ UNVERIFIED |
| WWardflex | Tioga | PA | — | ◇ UNVERIFIED |
Webco Industries, INC. Mannford Specialty Tube | Mannford | OK | — | ◇ UNVERIFIED |
Webco Industries, INC. - Reno Division | Reno | PA | — | ◇ UNVERIFIED |
Webco Industries, INC. Swt Cooper Bldg | Sand Springs | OK | — | ◇ UNVERIFIED |
| WIWebco Industries, Star Center Tube | Sand Springs | OK | — | ◇ UNVERIFIED |
| WTWelded Tubes INC | Orwell | OH | — | ◇ UNVERIFIED |
| WTWheatland Tube CO Niles Plant | Niles | OH | — | ◇ UNVERIFIED |
| WTWheatland Tube - Warren, a Div. of Zekelman Industries (0278080757) | Warren | OH | — | ◇ UNVERIFIED |
| WSWhemco Steel Castings Inc/west Homestead | Homestead | PA | — | ◇ UNVERIFIED |
| 2F2000 Foundation Products LLC - GA MFG | Garland | TX | 20–99 | ◐ LIKELY ACTIVE |
| ACABC Coating Co of Illinois | Manteno | IL | 20–99 | ◐ LIKELY ACTIVE |
| ASAccu-Tube - Sheridan | Englewood | CO | 20–99 | ◐ LIKELY ACTIVE |
| AIAce Irrigation and MFG. Co.- Eaton Metals | Kearney | NE | 20–99 | ◐ LIKELY ACTIVE |
| AFAk Fab LLC | Redmond | OR | — | ◐ LIKELY ACTIVE |
| ALAlbert Lea | Albert Lea | MN | 1–19 | ◐ LIKELY ACTIVE |
| AIAlcon Industries, INC. | Cleveland | OH | — | ◐ LIKELY ACTIVE |
| AUAlleima USA LLC - Houston | Houston | TX | 20–99 | ◐ LIKELY ACTIVE |
| AUAlleima USA LLC - Scranton | Clarks Summit | PA | 100–499 | ◐ LIKELY ACTIVE |
| ATAlliance Tubular Holdings LLC Darlington Plant | Darlington | PA | 20–99 | ◐ LIKELY ACTIVE |
| AFAllied Fabricators, LLC | Mc Gregor | TX | 20–99 | ◐ LIKELY ACTIVE |
| ATAllied Tube and Conduit | Phoenix | AZ | 100–499 | ◐ LIKELY ACTIVE |
| ATAllied Tube & Conduit DePere Wisconsin | De Pere | WI | 20–99 | ◐ LIKELY ACTIVE |
| ATAllied Tube & Conduit Hobart Indiana | Merrillville | IN | 100–499 | ◐ LIKELY ACTIVE |
| AUAlloy Unlimited Processing LLC | Austintown | OH | 1–19 | ◐ LIKELY ACTIVE |
| ACAM Calvert | Calvert | AL | 500+ | ◐ LIKELY ACTIVE |
| AMAmerican Metal Fabrication INC | Wellington | KS | — | ◐ LIKELY ACTIVE |
| ASAmerican SpiralWeld Great Lakes Division | Flint | MI | 20–99 | ◐ LIKELY ACTIVE |
| ASAmerican SpiralWeld Pipe Co., Southwest Division | Paris | TX | 100–499 | ◐ LIKELY ACTIVE |
| ASAmerican Steel Castings LLC | Midland | PA | — | ◐ LIKELY ACTIVE |
| AVAmerican Veterans Steel LLC | Southwest Ranches | FL | — | ◐ LIKELY ACTIVE |
| AAmg | Sylacauga | AL | 20–99 | ◐ LIKELY ACTIVE |
| ABAMICO - Birmingham | Birmingham | AL | 20–99 | ◐ LIKELY ACTIVE |
| AUArcelormittal USA Research LLC | East Chicago | IN | — | ◐ LIKELY ACTIVE |
| ASArchetype Signmakers, Inc. (Bloomington, MN) | Bloomington | MN | 20–99 | ◐ LIKELY ACTIVE |
| AWArc-up Welding, INC | Vicksburg | MS | — | ◐ LIKELY ACTIVE |