WESTLAKE CORP — Director's Dealing 2020

Nov 6, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2020-11-05

Reporting Person: Bender Mark Steven (EVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-11-05	Common Stock	M	24996	$44.420	Acquired	54478	Direct
2020-11-05	Common Stock	S	24576	$73.98	Disposed	29902	Direct
2020-11-05	Common Stock	S	420	$74.54	Disposed	29482	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-11-05	Employee Option (right to buy)	$44.420	M	24996	Disposed	2026-02-18	Common Stock (24996)	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $73.45 to $74.44, 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 $74.47 to $74.59, 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 18, 2017, 2018 and 2019, respectively.