WESTLAKE CORP - Director's Dealing 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2012-08-06

Reporting Person: Hansen David R (Sr VP Adminstration)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-08-06	Common Stock	M	11518	$31.61	Acquired	37364	Direct
2012-08-06	Common Stock	M	2979	$20.525	Acquired	40343	Direct
2012-08-06	Common Stock	S	400	$67.01	Disposed	39943	Direct
2012-08-06	Common Stock	S	200	$67.02	Disposed	39743	Direct
2012-08-06	Common Stock	S	2000	$67.03	Disposed	37743	Direct
2012-08-06	Common Stock	S	300	$67.04	Disposed	37443	Direct
2012-08-06	Common Stock	S	800	$67.05	Disposed	36643	Direct
2012-08-06	Common Stock	S	200	$67.06	Disposed	36443	Direct
2012-08-06	Common Stock	S	1000	$67.07	Disposed	35443	Direct
2012-08-06	Common Stock	S	9845	$67.0765	Disposed	25598	Direct
2012-08-06	Common Stock	S	300	$67.08	Disposed	25298	Direct
2012-08-06	Common Stock	S	1445	$67.0801	Disposed	23853	Direct
2012-08-06	Common Stock	S	200	$67.1	Disposed	23653	Direct
2012-08-06	Common Stock	S	350	$67.11	Disposed	23303	Direct
2012-08-06	Common Stock	S	600	$67.12	Disposed	22703	Direct
2012-08-06	Common Stock	S	1350	$67.13	Disposed	21353	Direct
2012-08-06	Common Stock	S	300	$67.14	Disposed	21053	Direct
2012-08-06	Common Stock	S	100	$67.15	Disposed	20953	Direct
2012-08-06	Common Stock	S	200	$67.16	Disposed	20753	Direct
2012-08-06	Common Stock	S	100	$67.17	Disposed	20653	Direct
2012-08-06	Common Stock	S	10458	$67.2	Disposed	10195	Direct
2012-08-06	Common Stock	S	2300	$67.21	Disposed	7895	Direct
2012-08-06	Common Stock	S	939	$67.22	Disposed	6956	Direct
2012-08-06	Common Stock	S	500	$500	Disposed	6456	Direct
2012-08-06	Common Stock	S	200	$67.24	Disposed	6256	Direct
2012-08-06	Common Stock	S	100	$67.255	Disposed	6156	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-08-06	Employee Option (right to buy)	$31.61	M	11518	Acquired	2017-02-23	Common Stock (11518)	Direct
2012-08-06	Employee Option (right to buy)	$20.525	M	2979	Acquired	2020-02-26	Common Stock (2979)	Direct