WESTLAKE CORP — Director's Dealing 2014

May 8, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2014-05-07

Reporting Person: Buesinger Robert F. (Sr. Vice President, Vinyls)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-07	Common Stock	M	1872	$45.6975	Acquired	9544	Direct
2014-05-07	Common Stock	S	1872	$77.3608	Disposed	7672	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-05-07	Employee Option (right to buy)	$45.6975	M	1872	Disposed	2023-02-15	Common Stock (1872)	Direct

Footnotes

F1: Values and amounts reflect the results of a two-for-one stock split on March 18, 2014.

F2: The stock options are exercisable in three installments of 33%, 33% and 34% on February 15, 2014, 2015 and 2016, respectively.