WESTLAKE CORP - Director's Dealing 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2010-08-16

Reporting Person: Kenner Andrew (VP - Manufacturing)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-08-16	Common Stock	M	6427	$14.235	Acquired	17286	Direct
2010-08-16	Common Stock	S	900	$28.2900	Disposed	16386	Direct
2010-08-16	Common Stock	S	600	$28.2700	Disposed	15786	Direct
2010-08-16	Common Stock	S	609	$28.2596	Disposed	15177	Direct
2010-08-16	Common Stock	S	91	$28.2400	Disposed	15086	Direct
2010-08-16	Common Stock	S	700	$28.2314	Disposed	14386	Direct
2010-08-16	Common Stock	S	1314	$28.2300	Disposed	13072	Direct
2010-08-16	Common Stock	S	915	$28.1834	Disposed	12157	Direct
2010-08-16	Common Stock	S	1085	$28.1629	Disposed	11072	Direct
2010-08-16	Common Stock	S	200	$28.1026	Disposed	10872	Direct
2010-08-16	Common Stock	S	13	$28.1000	Disposed	10859	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-08-16	Employee Option (right to buy)	$14.235	M	6427	Disposed	2019-02-13	Common Stock (6427)	Direct

F1: The stock options are exercisable in three equal installments on February 13, 2010, 2011 and 2012.