| SGSlyde G8 Fabrication Inc | Houston | — | ◇ UNVERIFIED |
| SISnyder Industries | Houston | — | ◇ UNVERIFIED |
| SPSooner Pipe Crosby Yard | Crosby | — | ◇ UNVERIFIED |
| SSSouthern Stress, LLC | Humble | — | ◇ UNVERIFIED |
| STSouth Texas Sheet Metal LLC | Houston | — | ◇ UNVERIFIED |
| SPSouthwest Polishing & Gold | Houston | — | ◇ UNVERIFIED |
| SPSpartak Products INC. | Houston | — | ◇ UNVERIFIED |
| SCSpf Corporation of America | Houston | — | ◇ UNVERIFIED |
| SGSpring Glass and Mirror, LTD. | Spring | — | ◇ UNVERIFIED |
| SCSpx Corporation | Houston | — | ◇ UNVERIFIED |
| SSS + S Industries-navigation Site | Houston | — | ◇ UNVERIFIED |
| SSS & S Plating Company Coating Dynamics | Houston | — | ◇ UNVERIFIED |
| SSStainless Steel Custom Fabricators | Houston | — | ◇ UNVERIFIED |
| STStellar Tent, Inc. | Humble | — | ◇ UNVERIFIED |
| SMSTS Machine Incorporated | Tomball | — | ◇ UNVERIFIED |
| SMSun Machine, LTD | Houston | — | ◇ UNVERIFIED |
| SDSuperior Drillpipe Manufacturing | Houston | — | ◇ UNVERIFIED |
| TITechcote Industrial Coating LTD | Houston | — | ◇ UNVERIFIED |
| TFTech Fab | Houston | — | ◇ UNVERIFIED |
| TCTejas Casing | Houston | — | ◇ UNVERIFIED |
| TTTejas Tubular Products | Houston | — | ◇ UNVERIFIED |
| TATexas Arai | Houston | — | ◇ UNVERIFIED |
| TMTexas Metal Tech | Houston | — | ◇ UNVERIFIED |
| TSTexas Steel Conversion INC | Houston | — | ◇ UNVERIFIED |
| TSTexas Steel Fabricators INC. | Waller | — | ◇ UNVERIFIED |
| TSTexas Stell Conversion Almeda Rd Facility | Houston | — | ◇ UNVERIFIED |
| TJThe J & L Sheet Metal Co., INC. | Houston | — | ◇ UNVERIFIED |
| TWThe Walworth CO | Houston | — | ◇ UNVERIFIED |
| TBThomas & Betts CORP | Houston | — | ◇ UNVERIFIED |
| TAThreading and Precision Manufacturing, LLC | Houston | — | ◇ UNVERIFIED |
| TCTillman Container | Houston | — | ◇ UNVERIFIED |
| TTTip Top Sheet Metal, INC | Houston | — | ◇ UNVERIFIED |
| TMTnn Manufacturing | Houston | — | ◇ UNVERIFIED |
 Tns Industries INC. | Houston | — | ◇ UNVERIFIED |
| TUTorusa United Bakery Center | Houston | — | ◇ UNVERIFIED |
| TSTrojan Steel, LLC | Houston | — | ◇ UNVERIFIED |
| TSTrs Services - 2015 Site | Houston | — | ◇ UNVERIFIED |
| TSTR Strong Industrial Inc | Houston | — | ◇ UNVERIFIED |
| TVTuboscope Vetco International INC | Houston | — | ◇ UNVERIFIED |
| TSTubular Solutions | Houston | — | ◇ UNVERIFIED |
| TMTujays Machine Works, INC. | Houston | — | ◇ UNVERIFIED |
| TCTurner Coatings, LLC | Spring | — | ◇ UNVERIFIED |
| TITurner Industries | Pasadena | — | ◇ UNVERIFIED |
| TVTyco Valves & Controls L P | Houston | — | ◇ UNVERIFIED |
| UPUnderground Products, Inc. | Houston | — | ◇ UNVERIFIED |
| UCUnited Casing Tubular Services Sheldon Road | Houston | — | ◇ UNVERIFIED |
| UMUnited Machine Works | Houston | — | ◇ UNVERIFIED |
| UMUnited Metal Services | Houston | — | ◇ UNVERIFIED |
| UIUtex Industries Specialty Valves Division | Tomball | — | ◇ UNVERIFIED |
| VTVallourec Tube Alloy | Houston | — | ◇ UNVERIFIED |
