WESTLAKE CORP — Director's Dealing 2013

Mar 18, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2013-03-14

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-03-14	Common Stock	M	1017	$20.525	Acquired	15175	Direct
2013-03-14	Common Stock	S	1017	$96.067	Disposed	14158	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-03-14	Employee Option (right to buy)	$20.525	M	1017	Disposed	2020-02-26	Common Stock (1017)	Direct