WESTLAKE CORP — Director's Dealing 2011

Mar 4, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

Reporting Person: LUKENS MAX L (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-03-03	Common Stock	M	2759	$14.50	Acquired	10984	Direct
2011-03-03	Common Stock	S	2759	$48.41	Disposed	8225	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-03-03	Employee Option (right to buy)	$14.50	M	2759	Acquired	2017-08-16	Common Stock (2759)	Direct