| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2011-02-11 | DIMENSIONAL FUND ADVISORS LP | WESTLAKE CHEMICAL CORP | 3,684,390 | 5.6% | EDGAR |
| SC 13G/A | 2011-02-11 | TTWF LP | WESTLAKE CHEMICAL CORP | 46,005,277 | 69.4% | EDGAR |
| SC 13G/A | 2011-02-09 | FRANKLIN RESOURCES INC | WESTLAKE CHEMICAL CORP | 1,864,900 | 2.8% | EDGAR |
| SC 13G/A | 2011-01-26 | ROYCE & ASSOCIATES LLC | WESTLAKE CHEMICAL CORP | 3,798,531 | 5.7% | EDGAR |
| SC 13G/A | 2010-02-08 | DIMENSIONAL FUND ADVISORS LP | WESTLAKE CHEMICAL CORP | 3,855,751 | 5.8% | EDGAR |
| SC 13G/A | 2010-02-05 | TTWF LP | WESTLAKE CHEMICAL CORP | 46,005,277 | 69.7% | EDGAR |
| SC 13G/A | 2010-02-04 | FRANKLIN RESOURCES INC | WESTLAKE CHEMICAL CORP | 4,249,121 | 6.4% | EDGAR |
| SC 13G/A | 2010-01-26 | ROYCE & ASSOCIATES LLC | WESTLAKE CHEMICAL CORP | 4,217,473 | 6.4% | EDGAR |
| SC 13G | 2009-06-11 | THIRD AVENUE MANAGEMENT LLC | WESTLAKE CHEMICAL CORP | 3,200,981 | 4.9% | EDGAR |
| SC 13G | 2009-02-13 | THIRD AVENUE MANAGEMENT LLC | WESTLAKE CHEMICAL CORP | 4,119,023 | 6.3% | EDGAR |
| SC 13G/A | 2009-02-09 | FRANKLIN RESOURCES INC | WESTLAKE CHEMICAL CORP | 4,550,900 | 6.9% | EDGAR |
| SC 13G/A | 2009-02-09 | TTWF LP | WESTLAKE CHEMICAL CORP | 46,005,277 | 70.1% | EDGAR |
| SC 13G | 2009-02-09 | DIMENSIONAL FUND ADVISORS INC | WESTLAKE CHEMICAL CORP | 3,497,377 | 5.3% | EDGAR |
| SC 13G/A | 2009-01-30 | ROYCE & ASSOCIATES LLC | WESTLAKE CHEMICAL CORP | 4,053,182 | 6.2% | EDGAR |
| SC 13G | 2008-02-14 | THIRD AVENUE MANAGEMENT LLC | WESTLAKE CHEMICAL CORP | 4,639,335 | 7.1% | EDGAR |
| SC 13G/A | 2008-02-05 | TTWF LP | WESTLAKE CHEMICAL CORP | 46,005,277 | 70.3% | EDGAR |
| SC 13G | 2008-02-04 | FRANKLIN RESOURCES INC | WESTLAKE CHEMICAL CORP | 3,937,100 | 6.0% | EDGAR |
| SC 13G | 2008-02-01 | ROYCE & ASSOCIATES LLC | WESTLAKE CHEMICAL CORP | 6,227,810 | 9.5% | EDGAR |
| SC 13G/A | 2007-12-10 | BARCLAYS GLOBAL INVESTORS NA /CA/ | WESTLAKE CHEMICAL CORP | 223,288 | 0.3% | EDGAR |
| SC 13G/A | 2007-09-10 | BARCLAYS GLOBAL INVESTORS NA /CA/ | WESTLAKE CHEMICAL CORP | 3,114,237 | 4.8% | EDGAR |