| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WLK | Common Stock | Options Exercise | $925K | +30.8K | +6.97% | $30.05 | 473K | Dec 2, 2021 | Direct | |
| transaction | WLK | Common Stock | Sale | -$152K | -1.7K | -0.36% | $89.25 | 471K | Dec 2, 2021 | Direct | F1 |
| transaction | WLK | Common Stock | Sale | -$106K | -1.18K | -0.25% | $90.12 | 470K | Dec 2, 2021 | Direct | F2 |
| transaction | WLK | Common Stock | Sale | -$694K | -7.59K | -1.61% | $91.52 | 462K | Dec 2, 2021 | Direct | F3 |
| transaction | WLK | Common Stock | Sale | -$1.88M | -20.3K | -4.4% | $92.29 | 442K | Dec 2, 2021 | Direct | F4 |
| holding | WLK | Common Stock | 93.4M | Dec 2, 2021 | TTWF LP & TTWF GP LLC | F6 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WLK | Employee Option (right to buy) | Options Exercise | $0 | -30.8K | -100% | $0.00* | 0 | Dec 2, 2021 | Common Stock | 30.8K | $30.05 | Direct | F5 |
| Id | Content |
|---|---|
| F1 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $88.64 to $89.58, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. |
| F2 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $89.73 to $90.39, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. |
| F3 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $90.99 to $91.98, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. |
| F4 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $92.05 to $92.88, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. |
| F5 | The stock options are excercisable in three equal installments on February 17, 2013, 2014 and 2015. |
| F6 | 93,405,554 shares of Issuer are held through TTWF LP, a Delaware limited partnership, and TTWF GP LLC, a Delaware limited liability company and the general partner of TTWF LP. Two trusts for the benefit of members of the Chao family, including the reporting person, are the managers of TTWFGP LLC. The limited partners of TTWF LP are five trusts, principally for the benefit of members of the Chao family, including the reporting person, and two corporations owned, indirectly or directly, by certain of these trusts and by other entities owned by members of the Chao family, including the reporting person. The reporting person shares investment and voting power with respect to the shares beneficially owned by TTWF LP and TTWFGP LLC. The reporting person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein. |