| KIKraton Innovation Center - Houston | Houston | 20–99 | ◐ LIKELY ACTIVE |
| PPProske Plastic Products INC | Houston | 20–99 | ◐ LIKELY ACTIVE |
| TITacot INC | Houston | — | ◐ LIKELY ACTIVE |
| TPTexas Petrochemicals | Houston | — | ◐ LIKELY ACTIVE |
| BHBasf Houston Polyurethane | Houston | — | ◐ LIKELY ACTIVE |
 Specialty Construction Brands | Houston | — | ◐ LIKELY ACTIVE |
| AIAprm INC | Houston | — | ◇ UNVERIFIED |
| ASAshland Specialty Chemical Company - Houston, Tx | Houston | — | ◇ UNVERIFIED |
| BBlentech | Houston | — | ◇ UNVERIFIED |
| CCCcp Composites US | Houston | — | ◇ UNVERIFIED |
| CSClock Spring | Houston | — | ◇ UNVERIFIED |
| EMEconomy Mud Products CO | Houston | — | ◇ UNVERIFIED |
| HPHouston Plant | Houston | — | ◇ UNVERIFIED |
| IPIntercoastal Paint | Houston | — | ◇ UNVERIFIED |
| IPItw Polymers Coatings NA | Houston | — | ◇ UNVERIFIED |
| MBMaster Builders Solutions Construction Systems US - Houston | Houston | — | ◇ UNVERIFIED |
| RBRoyal Baths Buschong Road Facility | Houston | — | ◇ UNVERIFIED |
| SCSyntech Chemicals | Houston | — | ◇ UNVERIFIED |
| TVTuboscope Vetco International Plant 3 | Houston | — | ◇ UNVERIFIED |
 Gulf Coast Regional Blood Center | Houston | — | ◐ LIKELY ACTIVE |
 South Texas Nuclear Pharmacy, INC. | Houston | — | ◐ LIKELY ACTIVE |
| AMArcot Manufacturing Corporation | Houston | 20–99 | ◐ LIKELY ACTIVE |
| AHArkema Houston Plant | Houston | 20–99 | ◐ LIKELY ACTIVE |
| BHBayer Houston Plant | Houston | — | ◐ LIKELY ACTIVE |
| CICim Industries | Houston | — | ◐ LIKELY ACTIVE |
| CLCsa Limited, INC. | Houston | — | ◐ LIKELY ACTIVE |
| FSFarouk Systems | Houston | — | ◐ LIKELY ACTIVE |
| HHouston | Houston | 100–499 | ◐ LIKELY ACTIVE |
| RRReichhold Reactive Polymers Division Houston Plant | Houston | — | ◐ LIKELY ACTIVE |
| SMSolugen Minetta Facility | Houston | — | ◐ LIKELY ACTIVE |
| SQSpectrum Quality Standards | Houston | — | ◐ LIKELY ACTIVE |
| TBTBC Brinadd, LLC. | Houston | 1–19 | ◐ LIKELY ACTIVE |
| ASAllchem Services | Houston | — | ◐ LIKELY ACTIVE |
| AFAlternative Fuels Dev | Houston | — | ◐ LIKELY ACTIVE |
| ATAmerican Thermoplastics | Houston | — | ◐ LIKELY ACTIVE |
| APAqua Process Plant | Houston | — | ◐ LIKELY ACTIVE |
| HCHouston Chemical Complex Battleground | Houston | — | ◐ LIKELY ACTIVE |
| AWAmerican Warehouses, LTD. | Houston | — | ◇ UNVERIFIED |
| BHBaker Hughes Sheldon Road Plant | Houston | — | ◇ UNVERIFIED |
| BMBonanza Marble | Houston | — | ◇ UNVERIFIED |
| BSBrenntag Southwest - Greens Bayou | Houston | — | ◇ UNVERIFIED |
| CSCapital Southwest Rectorseal | Houston | — | ◇ UNVERIFIED |
| CIChempak International | Houston | — | ◇ UNVERIFIED |
| CHChemstation Houston LLC | Houston | — | ◇ UNVERIFIED |
| CPClorox Prods Mfg CO | Houston | — | ◇ UNVERIFIED |
| DCDallas Chemical Techs INC | Houston | — | ◇ UNVERIFIED |
| EIE I Dupont De Nemours | Houston | — | ◇ UNVERIFIED |
| ECExxon Chemical Americas Houston Chemical Plant | Houston | — | ◇ UNVERIFIED |
| FSFarouk Systems Richy Rd Warehouse | Houston | — | ◇ UNVERIFIED |
| GPGeorgia Pacific Resins INC | Houston | — | ◇ UNVERIFIED |
