WESTLAKE CORP — Director's Dealing 2011

Feb 28, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2011-02-24

Reporting Person: Condon Donald Marion Jr (Sr VP, Olefins & Corp Bus Dev)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-24	Common Stock	M	1648	$31.61	Acquired	23718	Direct
2011-02-24	Common Stock	M	8106	$19.29	Acquired	31824	Direct
2011-02-24	Common Stock	M	5518	$14.235	Acquired	37342	Direct
2011-02-24	Common Stock	S	15272	$47.35	Disposed	22070	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-24	Employee Option (right to buy)	$31.61	M	1648	Disposed	2017-02-23	Common Stock (1648)	Direct
2011-02-24	Employee Option (right to buy)	$19.29	M	8106	Disposed	2018-02-15	Common Stock (8106)	Direct
2011-02-24	Employee Option (right to buy)	$14.235	M	5518	Disposed	2019-02-13	Common Stock (5518)	Direct