WESTLAKE CORP — Director's Dealing 2017

Nov 20, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2017-11-20

Reporting Person: Buesinger Robert F. (EVP, Vinyls Products)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-11-17	Common Stock	M	5214	$63.9775	Acquired	14523	Direct
2017-11-17	Common Stock	S	5214	$93.8242	Disposed	9309	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-11-14	Employee Option (right to buy)	$63.9775	M	5214	Acquired	2024-02-14	Common Stock (5214)	Direct

Footnotes

F1: The stock options are excercisable in three installments of 33%, 33% and 34% on February 14, 2015, 2016 and 2017.