WESTLAKE CORP — Director's Dealing 2011

Mar 8, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2011-03-07

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-03-07	Common Stock	M	1901	$14.235	Disposed	27656	Direct
2011-03-07	Common Stock	S	1301	$50.00	Disposed	26355	Direct
2011-03-07	Common Stock	S	400	$50.0575	Disposed	25955	Direct
2011-03-07	Common Stock	S	200	$50.085	Disposed	25755	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-03-07	Employee Option (right to buy)	$14.235	M	1901	Disposed	2019-02-13	Common Stock (1901)	Direct