| MDMarble Designs of Texas | San Antonio | — | ◇ UNVERIFIED |
| MKMary Kay Dallas Facility | Dallas | — | ◇ UNVERIFIED |
| MBMaster Builders Solutions US at Palmer Logistics | Grand Prairie | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas INC | La Porte | — | ◇ UNVERIFIED |
| MOMeglobal Oyster Creek | Freeport | — | ◇ UNVERIFIED |
| MMMesa Marble & Stone CO INC (dba Marble-craft) | Bryan | — | ◇ UNVERIFIED |
| MPMgc Pure Chemicals America, INC | Killeen | — | ◇ UNVERIFIED |
| MPMomentive Performance Materials USA INC | Hurst | — | ◇ UNVERIFIED |
| MIMorton International | Grand Saline | — | ◇ UNVERIFIED |
| MSMpower Specialty Chemicals | Brookshire | — | ◇ UNVERIFIED |
| MCMuehlstein Compounded Products | Houston | — | ◇ UNVERIFIED |
| NINA Industries Pasadena | Seabrook | — | ◇ UNVERIFIED |
| NCNapco Chemical Co., INC. | Spring | — | ◇ UNVERIFIED |
| NCNational Casein | Tyler | — | ◇ UNVERIFIED |
| NGNatural Gas Odorizing, INC. | Baytown | — | ◇ UNVERIFIED |
| NTNeos Therapeutics | Grand Prairie | — | ◇ UNVERIFIED |
| NSNovita Solutions, LLC | Gainesville | — | ◇ UNVERIFIED |
| OSOilfield Solutions Midland | Midland | — | ◇ UNVERIFIED |
| OIOptiblend Industries, INC. | Midland | — | ◇ UNVERIFIED |
| OEOxbow Energy Solutions | Texas City | — | ◇ UNVERIFIED |
| OMOzark Materials, Llc, an Ingevity Company | Childress | — | ◇ UNVERIFIED |
| OLOzburn-hessey Logistics | Fort Worth | — | ◇ UNVERIFIED |
| PEPampa Energy Center | Pampa | — | ◇ UNVERIFIED |
| PMPasadena Methanol Plant | Pasadena | — | ◇ UNVERIFIED |
| PGPd Glycol Beaumont Plant | Beaumont | — | ◇ UNVERIFIED |
| PFPeden Facility | Fort Worth | — | ◇ UNVERIFIED |
| PSPencco Sealy | Sealy | — | ◇ UNVERIFIED |
| PIPhibro-tech INC | Garland | — | ◇ UNVERIFIED |
| PIPlexmar Incorporated | Houston | — | ◇ UNVERIFIED |
| PPolyone | Seabrook | — | ◇ UNVERIFIED |
| PCPolyone Corporation | Pasadena | — | ◇ UNVERIFIED |
| PAPort Arthur Plant | Port Arthur | — | ◇ UNVERIFIED |
| PNPort Neches Plant | Port Neches | — | ◇ UNVERIFIED |
| PSPower Service Prods INC | Weatherford | — | ◇ UNVERIFIED |
| PAPpg Architectural Finishes Waller | Waller | — | ◇ UNVERIFIED |
| PIPpg Idustries INC. Tx | Gainesville | — | ◇ UNVERIFIED |
| PPraxair | La Porte | — | ◇ UNVERIFIED |
| PPPraxair Port Arthur Hydrogen Facility | Port Arthur | — | ◇ UNVERIFIED |
| PTPraxair Texas City | Texas City | — | ◇ UNVERIFIED |
| PEPrime Eco Group INC | Wharton | — | ◇ UNVERIFIED |
| PEPrince Energy LLC | Houston | — | ◇ UNVERIFIED |
| PMPrince Minerals | Houston | — | ◇ UNVERIFIED |
| QCQuest Chemical CORP | Houston | — | ◇ UNVERIFIED |
| RMRavago Manufacturing Americas | Houston | — | ◇ UNVERIFIED |
| RMR&d Marble INC. | Willis | — | ◇ UNVERIFIED |
| RCReef Chemical CO INC | Odessa | — | ◇ UNVERIFIED |
| RSResin Solutions | Beaumont | — | ◇ UNVERIFIED |
 Reynolds Consumer Products | Temple | — | ◇ UNVERIFIED |
| RCRiverside Commodities | Evadale | — | ◇ UNVERIFIED |
| RARohm and Haas Chemicals Llc, Lone Star Plant | Deer Park | — | ◇ UNVERIFIED |
