| EPExcel Paralubes | Westlake | LA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| HEHalliburton Energy Svcs | Westlake | LA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ALAir Liquide America CORP | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| EHEnergizer Holdings, INC. | Westlake | OH | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| ECEquistar Chemicals LP | Westlake | LA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| GTG2o Technologies LLC - Westlake Facility | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| LILinde INC - Westlake Compressor Facility | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas INC - Westlake I & Ii Facility | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| PCPrairie Contractors INC - Westlake Central Mfg CO Hot Mix Asphalt Plant Sn 003 | Westlake | LA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PWPraxair Westlake Hydrogen Facility | Westlake | LA | Paper Manufacturing322219 | — | ◇ UNVERIFIED |
| PIPsc Industrial Outsourcing LP | Westlake | LA | Machinery Manufacturing333911 | — | ◇ UNVERIFIED |
| RER E Heidt Construction CO INC | Westlake | LA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SNSasol North America INC - Lab Plant | Westlake | LA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| TLTdc LLC - Westlake Plant | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| TCTetra Chemicals | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| XPX-i-m Products INC | Westlake | OH | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| ACArch Chemicals CORP - Lake Charles Plant | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| ACAxiall Corporation | Westlake | LA | Chemical Manufacturing325181 | — | ◇ UNVERIFIED |
| COCity of Cleve Crown Water Treatment Plt (1318612482) | Westlake | OH | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| CECutting Edge Fluids Inc. | Westlake | OH | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| DPDunham Price Industrial LLC - Central Mix Concrete Plant | Westlake | LA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ILIconic Labs LLC | Westlake | OH | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| ISI.C. Scientific Solutions | Westlake | OH | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| JDJames Development Group, LLC | Westlake | OH | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas INC - Pelican Air Separation Unit | Westlake | LA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| OCOlin CORP Lake Charles Plant | Westlake | LA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| PTPressure Tek, LLC | Westlake | OH | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| RSRAM Sensors, Inc. | Westlake | OH | Fabricated Metal Product Manufacturing332613 | — | ◇ UNVERIFIED |
| RMRedi Mix Westlake Cbp Sn Ceclp327wlk | Westlake | TX | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RHR & H Quality Refractory Services INC | Westlake | LA | Paper Manufacturing322219 | — | ◇ UNVERIFIED |
| UIUsg Interiors, Inc., American Metals Corp., Westlake (1318617346) | Westlake | OH | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
