WESTLAKE CORP — Director's Dealing 2011

Mar 16, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2011-03-15

Reporting Person: Kenner Andrew (VP - Manufacturing)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-03-15	Common Stock	M	6427	$14.235	Acquired	18874	Direct
2011-03-15	Common Stock	M	2892	$20.525	Acquired	21766	Direct
2011-03-15	Common Stock	S	9319	$47.87	Disposed	12447	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-03-15	Employee Option (right to buy)	$14.235	M	6427	Acquired	2019-02-13	Common Stock (6427)	Direct
2011-03-15	Employee Option (right to buy) (Common Stock)	$20.525	M	2892	Acquired	2020-02-26	Common Stock (2892)	Direct