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: 2011-02-25

Reporting Person: Bender Mark Steven (Sr Vice President & CFO)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-25	Common Stock	M	20066	$14.235	Acquired	60381	Direct
2011-02-25	Common Stock	M	7767	$19.290	Acquired	68148	Direct
2011-02-25	Common Stock	S	2000	$46.68	Disposed	66148	Direct
2011-02-25	Common Stock	S	2000	$46.67	Disposed	64148	Direct
2011-02-25	Common Stock	S	160	$46.58	Disposed	63988	Direct
2011-02-25	Common Stock	S	2800	$46.53	Disposed	61188	Direct
2011-02-25	Common Stock	S	3000	$46.52	Disposed	58188	Direct
2011-02-25	Common Stock	S	429	$46.50	Disposed	57759	Direct
2011-02-25	Common Stock	S	1100	$46.49	Disposed	56659	Direct
2011-02-25	Common Stock	S	200	$46.48	Disposed	56459	Direct
2011-02-25	Common Stock	S	200	$46.47	Disposed	56259	Direct
2011-02-25	Common Stock	S	451	$46.46	Disposed	55808	Direct
2011-02-25	Common Stock	S	2317	$46.45	Disposed	53491	Direct
2011-02-25	Common Stock	S	1099	$46.44	Disposed	52392	Direct
2011-02-25	Common Stock	S	600	$46.43	Disposed	51792	Direct
2011-02-25	Common Stock	S	5145	$46.41	Disposed	46647	Direct
2011-02-25	Common Stock	S	300	$46.40	Disposed	46347	Direct
2011-02-25	Common Stock	S	2949	$46.39	Disposed	43398	Direct
2011-02-25	Common Stock	S	200	$46.38	Disposed	43198	Direct
2011-02-25	Common Stock	S	100	$46.37	Disposed	43098	Direct
2011-02-25	Common Stock	S	883	$46.35	Disposed	42215	Direct
2011-02-25	Common Stock	S	500	$46.34	Disposed	41715	Direct
2011-02-25	Common Stock	S	1400	$46.31	Acquired	40315	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-25	Employee Option (right to buy)	$14.235	M	20066	Disposed	2019-02-13	Common Stock (20066)	Direct
2011-02-25	Employee Option (right to buy)	$19.290	M	7767	Disposed	2018-02-15	Common Stock (7767)	Direct