WESTLAKE CORP — Director's Dealing 2011

Mar 10, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2011-03-08

Reporting Person: Mangieri George J (VP & Chief Accounting Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-03-08	Common Stock	M	3225	$14.235	Disposed	28980	Direct
2011-03-08	Common Stock	S	1900	$48.64	Disposed	27080	Direct
2011-03-08	Common Stock	S	125	$48.65	Disposed	26955	Direct
2011-03-08	Common Stock	S	200	$48.66	Disposed	26755	Direct
2011-03-08	Common Stock	S	1000	$48.695	Disposed	25755	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-03-08	Employee Option (right to buy)	$14.235	M	3225	Acquired	2019-02-13	Common Stock (3225)	Direct