| CFCoastal Foundry CO | Houston | TX | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| SMSalzgitter Mannesmann Stainless Tubes | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TCTenarius Coiled Tube | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| VQVarco Quality Tubing Tuboscope Div | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum CORP | Houston | PA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum Llc/houston Fitch Works | Houston | PA | Primary Metal Manufacturing331100 | — | ◇ UNVERIFIED |
| CICerda Industries, INC. | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| DFDee Foundries INC. | Houston | TX | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| LPLead Products - Houston | Houston | TX | Primary Metal Manufacturing331423 | — | ◇ UNVERIFIED |
| RERti Extrusions | Houston | TX | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| SMSandvik Materials Technology | Houston | TX | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| SSepramet | Houston | TX | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| SWService Wire CO | Houston | TX | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| SWShinko Wire America,inc. | Houston | TX | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| TCTenaris Coiled Tubes - Seacat | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TPTexas Pmw INC | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| TPTubular Processing Houston Operations | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
 American Cast Iron Pipe CO. | Houston | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| ESEj Solutions | Houston | TX | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| FIFlexeaze INC. | Houston | TX | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| GCGulf Coast Steel, INC | Houston | TX | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| LMLincoln Manufacturing | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MCManufactured Component Parts, LTD | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| MCMid-south Control Line | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| NPNorthwest Pipe-houston | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| OWO'brien Wire Products of Texas, INC. | Houston | TX | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| PMPrecision Machine Shop Inc | Houston | TX | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| RAReal Alloy Recycling, INC. | Houston | TX | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| RMRilco Manufacturing Co., Inc. | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| RIRti International Metals INC. | Houston | TX | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| SSepramet | Houston | TX | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| STSigma Tube & Bar LLC | Houston | TX | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| SPStar Pipe Products | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SSSteel Surplus, INC. | Houston | TX | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| TCTejas Casing | Houston | TX | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| TMTenaris Mesa | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| USU.s. Steel Tubular Products | Houston | TX | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
