WESTLAKE CORP - Director's Dealing 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2018-02-26

Reporting Person: Teel Lawrence E. (EVP, Olefins)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-02-26	Common Stock	M	1998	$68.09	Acquired	4120	Direct
2018-02-26	Common Stock	M	3412	$61.865	Acquired	7532	Direct
2018-02-26	Common Stock	M	3941	$44.420	Acquired	11473	Direct
2018-02-26	Common Stock	S	9351	$111.86	Disposed	2122	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-02-26	Employee Option (right to buy)	$68.09	M	1998	Disposed	2025-02-20	Common Stock (1998)	Direct
2018-02-26	Employee Option (right to buy)	$61.865	M	3412	Disposed	2027-02-17	Common Stock (3412)	Direct
2018-02-26	Employee Option (right to buy)	$44.420	M	3941	Disposed	2026-02-18	Common Stock (3941)	Direct

F1: The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2016, 2017 and 2018.

F2: The stock options are excercisable in three installments of 33%, 33% and 34% on February 17, 2018, 2019 and 2020.

F3: The stock options are excercisable in three installments of 33%, 33% and 34% on February 18, 2017, 2018 and 2019.