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WESTLAKE CORP Director's Dealing 2018

Mar 6, 2018

30551_dirs_2018-03-06_d15fe5f4-c8f8-4a03-be2d-7b1bc49c24d6.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: 2018-03-05

Reporting Person: Kenner Andrew (SVP - Chemical Manufacturing)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2018-03-05 Common Stock M 5952 $45.6975 Acquired 20005 Direct
2018-03-05 Common Stock M 5214 $63.9775 Acquired 25219 Direct
2018-03-05 Common Stock M 6007 $68.09 Acquired 31226 Direct
2018-03-05 Common Stock M 7145 $44.42 Acquired 38371 Direct
2018-03-05 Common Stock S 24318 $110.61 Disposed 14053 Direct

Derivative Transactions

Date Security Exercise Price Code Shares A/D Expiration Underlying Ownership
2018-03-05 Employee Option (right to buy) $45.6975 M 5952 Disposed 2023-02-15 Common Stock (5952) Direct
2018-03-05 Employee Option (right to buy) $63.9775 M 5214 Disposed 2024-02-14 Common Stock (5214) Direct
2018-03-05 Employee Option (right to buy) $68.09 M 6007 Disposed 2025-02-20 Common Stock (6007) Direct
2018-03-05 Employee Option (right to buy) $44.42 M 7145 Disposed 2026-02-18 Common Stock (7145) Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $110.45 to $110.75, 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 stock options are excercisable in three installments of 33%, 33% and 34% on February 15, 2014, 2015 and 2016.

F3: The stock options are excercisable in three installments of 33%, 33% and 34% on February 14, 2015, 2016 and 2017.

F4: The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2016, 2017 and 2018.

F5: The stock options are excercisable in three installments of 33%, 33% and 34% on February 18, 2017, 2018 and 2019.