| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2024-02-14 | TTWF LP | WESTLAKE CORP | 92,010,554 | 71.8% | EDGAR |
| SC 13G/A | 2023-01-18 | TTWF LP | WESTLAKE CORP | 92,010,554 | 72.2% | EDGAR |
| SC 13G/A | 2022-01-21 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 71.9% | EDGAR |
| SC 13G/A | 2021-02-05 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 72.0% | EDGAR |
| SC 13G/A | 2020-02-07 | FMR LLC | WESTLAKE CHEMICAL CORP | 2,722,864 | 2.1% | EDGAR |
| SC 13G/A | 2020-01-24 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 71.7% | EDGAR |
| SC 13G | 2019-02-13 | FMR LLC | WESTLAKE CHEMICAL CORP | 7,666,775 | 5.9% | EDGAR |
| SC 13G/A | 2019-02-11 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 71.6% | EDGAR |
| SC 13G/A | 2018-02-14 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 71.1% | EDGAR |
| SC 13G/A | 2017-02-13 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 71.4% | EDGAR |
| SC 13G/A | 2016-02-12 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 70.6% | EDGAR |
| SC 13G/A | 2015-02-13 | TTWF LP | WESTLAKE CHEMICAL CORP | 92,010,554 | 69.2% | EDGAR |
| SC 13G/A | 2014-02-11 | TTWF LP | WESTLAKE CHEMICAL CORP | 46,005,277 | 68.4% | EDGAR |
| SC 13G/A | 2014-01-30 | ROYCE & ASSOCIATES LLC | WESTLAKE CHEMICAL CORP | 2,023,218 | 3.0% | EDGAR |
| SC 13G/A | 2013-02-12 | TTWF LP | WESTLAKE CHEMICAL CORP | 46,005,277 | 68.5% | EDGAR |
| SC 13G/A | 2013-02-11 | DIMENSIONAL FUND ADVISORS LP | WESTLAKE CHEMICAL CORP | 2,084,031 | 3.1% | EDGAR |
| SC 13G/A | 2013-01-24 | ROYCE & ASSOCIATES LLC | WESTLAKE CHEMICAL CORP | 4,000,996 | 6.0% | EDGAR |
| SC 13G/A | 2012-02-13 | DIMENSIONAL FUND ADVISORS LP | WESTLAKE CHEMICAL CORP | 2,858,591 | 4.3% | EDGAR |
| SC 13G/A | 2012-02-10 | TTWF LP | WESTLAKE CHEMICAL CORP | 46,005,277 | 69.1% | EDGAR |
| SC 13G/A | 2012-01-24 | ROYCE & ASSOCIATES LLC | WESTLAKE CHEMICAL CORP | 5,435,692 | 8.2% | EDGAR |