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: 2012-05-25

Reporting Person: Chao James (Director, Chairman, 10% Owner, Chairman)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-25	Common Stock	M	35300	$14.50	Acquired	126208	Direct
2012-05-25	Common Stock	S	7400	$55.07	Disposed	118808	Direct
2012-05-25	Common Stock	S	1000	$55.08	Disposed	117808	Direct
2012-05-25	Common Stock	S	1100	$55.09	Disposed	116708	Direct
2012-05-25	Common Stock	S	3370	$55.1	Disposed	113338	Direct
2012-05-25	Common Stock	S	1000	$55.11	Disposed	112338	Direct
2012-05-25	Common Stock	S	100	$55.115	Disposed	112238	Direct
2012-05-25	Common Stock	S	200	$55.12	Disposed	112038	Direct
2012-05-25	Common Stock	S	206	$55.13	Disposed	111832	Direct
2012-05-25	Common Stock	S	224	$55.15	Disposed	111608	Direct
2012-05-25	Common Stock	S	500	$55.16	Disposed	111108	Direct
2012-05-25	Common Stock	S	2300	$55.17	Disposed	108808	Direct
2012-05-25	Common Stock	S	500	$55.18	Disposed	108308	Direct
2012-05-25	Common Stock	S	2428	$55.19	Disposed	105880	Direct
2012-05-25	Common Stock	S	6158	$55.20	Disposed	99722	Direct
2012-05-25	Common Stock	S	297	$55.21	Disposed	99425	Direct
2012-05-25	Common Stock	S	338	$55.22	Disposed	99087	Direct
2012-05-25	Common Stock	S	816	$55.23	Disposed	98271	Direct
2012-05-25	Common Stock	S	3107	$55.24	Disposed	95164	Direct
2012-05-25	Common Stock	S	100	$55.2401	Disposed	95064	Direct
2012-05-25	Common Stock	S	2248	$55.25	Disposed	92816	Direct
2012-05-25	Common Stock	S	308	$55.26	Disposed	92508	Direct
2012-05-25	Common Stock	S	700	$55.27	Disposed	91108	Direct
2012-05-25	Common Stock	S	900	$55.28	Disposed	90908	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-25	Employee Option(right to buy)	$14.50	M	35300	Acquired	2014-08-16	Common Stock (35300)	Direct