WESTLAKE CORP — Director's Dealing 2021

Mar 10, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2021-03-09

Reporting Person: Bender Mark Steven (EVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-09	Common Stock	M	9816	$63.9775	Acquired	41196	Direct
2021-03-09	Common Stock	M	15995	$61.865	Acquired	57191	Direct
2021-03-09	Common Stock	S	25811	$92.2719	Disposed	31380	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-09	Employee Option (right to buy)	$63.9775	M	9816	Disposed	2024-02-14	Common Stock (9816)	Direct
2021-03-09	Employee Option (right to buy)	$61.865	M	15995	Disposed	2027-02-17	Common Stock (15995)	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $92.00 to $92.95, 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 14, 2015, 2016 and 2017.

F3: The stock options are excercisable in three installments of 33%, 33% and 34% on February 17, 2018, 2019 and 2020.