WESTLAKE CORP — Director's Dealing 2013

Mar 14, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2013-03-12

Reporting Person: Teel Lawrence E. (Vice President, Olefins)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-03-12	Common Stock	M	520	$20.525	Acquired	1745	Direct
2013-03-12	Common Stock	M	449	$60.105	Acquired	2194	Direct
2013-03-12	Common Stock	M	446	$45.83	Acquired	2640	Direct
2013-03-12	Common Stock	S	200	$94.71	Disposed	2440	Direct
2013-03-12	Common Stock	S	800	$94.7119	Disposed	1640	Direct
2013-03-12	Common Stock	S	315	$94.72	Disposed	1325	Direct
2013-03-12	Common Stock	S	100	$94.765	Disposed	1225	Direct
2013-03-12	Common Stock	S	421	$94.5230	Disposed	804	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-03-12	Employee Option (right to buy)	$20.525	M	520	Disposed	2020-02-26	Common Stock (520)	Direct
2013-03-12	Employee Option (right to buy)	$60.105	M	449	Disposed	2022-02-17	Common Stock (449)	Direct
2013-03-12	Employee Option (right to buy)	$45.83	M	446	Disposed	2021-02-18	Common Stock (446)	Direct