WESTLAKE CORP - Director's Dealing 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2011-02-28

Reporting Person: Hansen David R (Sr VP Adminstration)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-28	Common Stock	M	3251	$27.22	Acquired	31030	Direct
2011-02-28	Common Stock	M	1522	$36.10	Acquired	32552	Direct
2011-02-28	Common Stock	M	4123	$31.61	Acquired	36675	Direct
2011-02-28	Common Stock	S	1423	$47.30	Disposed	35252	Direct
2011-02-28	Common Stock	S	1000	$47.31	Disposed	34252	Direct
2011-02-28	Common Stock	S	200	$47.32	Disposed	34052	Direct
2011-02-28	Common Stock	S	100	$47.33	Disposed	33952	Direct
2011-02-28	Common Stock	S	100	$47.34	Disposed	33852	Direct
2011-02-28	Common Stock	S	300	$47.36	Disposed	33552	Direct
2011-02-28	Common Stock	S	600	$47.37	Disposed	32952	Direct
2011-02-28	Common Stock	S	300	$47.38	Disposed	32652	Direct
2011-02-28	Common Stock	S	100	$47.39	Disposed	32552	Direct
2011-02-28	Common Stock	S	400	$47.46	Disposed	32152	Direct
2011-02-28	Common Stock	S	273	$47.47	Disposed	31879	Direct
2011-02-28	Common Stock	S	800	$47.48	Disposed	31079	Direct
2011-02-28	Common Stock	S	1600	$47.49	Disposed	29479	Direct
2011-02-28	Common Stock	S	600	$47.52	Disposed	28879	Direct
2011-02-28	Common Stock	S	500	$47.53	Disposed	28379	Direct
2011-02-28	Common Stock	S	100	$47.55	Disposed	28279	Direct
2011-02-28	Common Stock	S	100	$47.56	Disposed	28179	Direct
2011-02-28	Common Stock	S	100	$47.57	Disposed	28079	Direct
2011-02-28	Common Stock	S	100	$47.58	Disposed	27879	Direct
2011-02-28	Common Stock	S	200	$48.08	Disposed	27679	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-28	Employee Option (right to buy)	$27.22	M	3251	Acquired	2015-08-31	Common Stock (3251)	Direct
2006-03-15	Employee Option (right to buy)	$36.10	M	1522	Acquired	2016-03-15	Common Stock (1522)	Direct
2011-02-28	Employee Option (right to buy)	$31.61	M	4123	Acquired	2017-02-23	Common Stock (4123)	Direct