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WESTLAKE CORP Director's Dealing 2021

Mar 15, 2021

30551_dirs_2021-03-15_b33d7c92-6fd9-4732-8c96-bf397076348e.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2021-03-12

Reporting Person: Bender Mark Steven (EVP and CFO)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2021-03-12 Common Stock M 10740 $45.6975 Acquired 42120 Direct
2021-03-12 Common Stock M 5000 $61.865 Acquired 47120 Direct
2021-03-12 Common Stock S 9920 $94.39 Disposed 37200 Direct
2021-03-12 Common Stock S 5820 $95.23 Disposed 31380 Direct

Derivative Transactions

Date Security Exercise Price Code Shares A/D Expiration Underlying Ownership
2021-03-12 Employee Option (right to buy) $45.6975 M 10740 Disposed 2023-02-15 Common Stock (10740) Direct
2021-03-12 Employee Option (right to buy) $61.865 M 5000 Disposed 2027-02-17 Common Stock (5000) Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.00 to $95.00, 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 $95.02 to $95.78, 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 stock options are excercisable in three installments of 33%, 33% and 34% on February 15, 2014, 2015 and 2016.

F4: The stock options are excercisable in three installments of 33%, 33% and 34% on February 17, 2018, 2019 and 2020.