WESTLAKE CORP — Director's Dealing 2013

Mar 15, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2013-03-13

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-03-13	Common Stock	M	1291	$20.525	Acquired	15449	Direct
2013-03-13	Common Stock	S	391	$95.11	Disposed	15058	Direct
2013-03-13	Common Stock	S	100	$95.1	Disposed	14958	Direct
2013-03-13	Common Stock	S	100	$95.06	Disposed	14858	Direct
2013-03-13	Common Stock	S	400	$95.08	Disposed	14458	Direct
2013-03-13	Common Stock	S	300	$95.09	Disposed	14158	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-03-13	Employee Option (right to buy)	$20.525	M	1291	Disposed	2020-02-26	Common Stock (1291)	Direct