| WESTINGHOUSE ELECTRIC COMPANY UT | Manufacturing | 0 | — | A |
| Westinghouse Electric Company LLC CT | — | 0 | — | — |
| Westinghouse Electric Company LLC (Update to 3/26/14 notice) CT | — | 0 | — | — |
| Westinghouse Electric Company, LLC (Update to 1/9/14 notice) CT | — | 0 | — | — |
| Westlake AZ | Manufacturing | 0 | — | B |
| Westlake FL | Manufacturing | 0 | — | C |
| Westlake LA | Manufacturing | 0 | — | A |
| Westlake SC | Manufacturing | 0 | — | A |
| Westlake WA | Manufacturing | 0 | — | D |
| Westlake WI | Manufacturing | 0 | — | A |
| Westlake Chemical KS | Manufacturing | 0 | — | D |
| Westlake Chemical LA | Manufacturing | 0 | — | A |
| Westlake Chemical TX | Manufacturing | 0 | — | A |
| Westlake Chemical - Plaquemine LA | Manufacturing | 0 | — | A |
| Westlake Chemical, LLC MS | Manufacturing | 0 | — | C |
| Westlake Chemicals LA | Manufacturing | 0 | — | A |
| Westlake Convalescent Hospital CA | Healthcare & Social Assistance | 0 | — | F |
| Westlake Corporation KY | Manufacturing | 0 | — | A |
| Westlake Corporation MI | Manufacturing | 0 | — | A |
| Westlake Corporation OH | Manufacturing | 0 | — | C |
| Westlake Corporation WV | Manufacturing | 0 | — | B |
| WESTLAKE EPOXY INC. FL | Manufacturing | 0 | — | A |
| Westlake Epoxy Inc. IL | Manufacturing | 0 | — | A |
| Westlake Epoxy Inc. TX | Manufacturing | 0 | — | A |
| Westlake Health & Rehabilitation Center CO | Healthcare & Social Assistance | 0 | — | F |
| Westlake Management Services, Inc MS | Manufacturing | 0 | — | B |
| Westlake Management Services, Inc. TX | Manufacturing | 9 | $150,863 | — |
| Westlake Operations LLC OH | Healthcare & Social Assistance | 0 | — | F |
| Westlake Payroll Solvere OPCO, LLC CA | Healthcare & Social Assistance | 0 | — | F |
| Westlake Petrochemicals LA | Construction | 0 | — | A |
| Westlake Pipe & Fittings AZ | Manufacturing | 0 | — | A |
| Westlake Pipe & Fittings GA | Manufacturing | 0 | — | B |
| Westlake Pipe & Fittings MS | Manufacturing | 0 | — | D |
| Westlake Pipe & Fittings PA | Manufacturing | 0 | — | D |
| Westlake Pipe & Fittings TN | Manufacturing | 0 | — | A |
| Westlake Plastics Company PA | Manufacturing | 0 | — | F |
| Westlake Royal Building Product - Krestmark TX | Manufacturing | 0 | — | A |
| Westlake Royal Building Products FL | Manufacturing | 0 | — | B |
| Westlake Royal Building Products NC | Manufacturing | 0 | — | D |
| Westlake Royal Building Products OH | Manufacturing | 0 | — | A |
| Westlake Royal Building Products PA | Manufacturing | 0 | — | C |
| WESTLAKE ROYAL BUILDING PRODUCTS SC | Manufacturing | 0 | — | D |
| Westlake Royal Building Products TN | Manufacturing | 0 | — | D |
| Westlake Royal Building Products TX | Manufacturing | 0 | — | A |
| Westlake Royal Building Products VA | Manufacturing | 0 | — | C |
| Westlake Royal Building Products - Franklin OH | Manufacturing | 0 | — | A |
| Westlake Royal Building Products Kutztown PA PA | Manufacturing | 0 | — | F |
| Westlake Royal Building Products-Henderson-NV NV | Manufacturing | 0 | — | A |
| Westlake Royal Roofing FL | Manufacturing | 0 | — | A |
| WESTLAKE ROYAL ROOFING NV | Manufacturing | 0 | — | A |
