| MCMaterial Containment INC | Houston | — | ◇ UNVERIFIED |
| MGMetalplate Galvanizing LP | Houston | — | ◇ UNVERIFIED |
| MPMetal Prep Houston Plant | Houston | — | ◇ UNVERIFIED |
| MIMirror Industries | Houston | — | ◇ UNVERIFIED |
| MCMw Components - Houston Fasteners | Houston | — | ◇ UNVERIFIED |
| NMNrg Maintenance Services | Houston | — | ◇ UNVERIFIED |
| OIOfs International Houston Plant | Houston | — | ◇ UNVERIFIED |
| OSO'neal Steel INC | Houston | — | ◇ UNVERIFIED |
| OOteco | Houston | — | ◇ UNVERIFIED |
| PKPelletizer Knives | Houston | — | ◇ UNVERIFIED |
| PIPgi International | Houston | — | ◇ UNVERIFIED |
| PIPowell Industries Offshore | Houston | — | ◇ UNVERIFIED |
| PSPraxair Surface Technologies INC | Houston | — | ◇ UNVERIFIED |
| PSPrecision Spray & Coatings | Houston | — | ◇ UNVERIFIED |
| PPulspray-keith | Houston | — | ◇ UNVERIFIED |
| QPQuality Product Finishing | Houston | — | ◇ UNVERIFIED |
| SASifco Applied Surface Concepts | Houston | — | ◇ UNVERIFIED |
| SFSigma Fasteners | Houston | — | ◇ UNVERIFIED |
| SMSouthline Metal Products CO | Houston | — | ◇ UNVERIFIED |
| SSSpeed & Sport Chrome Plating | Houston | — | ◇ UNVERIFIED |
| SSS & S Plating CO | Houston | — | ◇ UNVERIFIED |
 Standard Machine Works INC | Houston | — | ◇ UNVERIFIED |
| SPStauffer Pipe Services | Houston | — | ◇ UNVERIFIED |
| SAStewart and Stevenson Telge Road Facility | Houston | — | ◇ UNVERIFIED |
| TSTexas Steel Processing | Houston | — | ◇ UNVERIFIED |
| TCTimkensteel CORP | Houston | — | ◇ UNVERIFIED |
| TTranter | Houston | — | ◇ UNVERIFIED |
| THTuboscope Highway 90 Coating Facility | Houston | — | ◇ UNVERIFIED |
| USU S Steel Oilwell Services Wheeling Machine Produc | Houston | — | ◇ UNVERIFIED |
| VTVallourec Tube Alloy | Houston | — | ◇ UNVERIFIED |
| VUVam USA Miller Rd | Houston | — | ◇ UNVERIFIED |
| VMVanguard Metal Technologies | Houston | — | ◇ UNVERIFIED |
| WEWare Electroplating CO | Houston | — | ◇ UNVERIFIED |
| WMWaste Management - Fairbanks Landfill | Houston | — | ◇ UNVERIFIED |
| WWWeatherford Well Screen | Houston | — | ◇ UNVERIFIED |
| WLWest Little York Coating Plant | Houston | — | ◇ UNVERIFIED |
| WBWhirlwind Bldg Systems | Houston | — | ◇ UNVERIFIED |
| 7H719 - Houston, TX | Houston | 20–99 | ◐ LIKELY ACTIVE |
| AEAbaga Estates LLC | Houston | — | ◐ LIKELY ACTIVE |
| AFAce Fabricators inc | Houston | 100–499 | ◐ LIKELY ACTIVE |
| AFACT Fabrication, Inc. (Houston) | Houston | 20–99 | ◐ LIKELY ACTIVE |
| ACADMOC CORP EE Oceanside | Houston | 1–19 | ◐ LIKELY ACTIVE |
| AMADMTX MTX Administration | Houston | 1–19 | ◐ LIKELY ACTIVE |
| ACAdvanced Container Company, INC. | Houston | — | ◐ LIKELY ACTIVE |
 Advanced Piping Products Incorporated | Houston | — | ◐ LIKELY ACTIVE |
| ALAlfa Laval Inc. Ashbrook (loc code: ASHTEX) | Houston | 20–99 | ◐ LIKELY ACTIVE |
| AAAmerican Alloy Steel TX1 Houston Texas | Houston | 100–499 | ◐ LIKELY ACTIVE |
| AAmot | Houston | 20–99 | ◐ LIKELY ACTIVE |
| AAmresist | Houston | 20–99 | ◐ LIKELY ACTIVE |
| AMAmtex Machine Products INC | Houston | 20–99 | ◐ LIKELY ACTIVE |
