 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 |
