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: Condon Donald Marion Jr (Sr VP, Corp Bus Dev)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-03-13	Common Stock	M	2691	$20.525	Acquired	22425	Direct
2013-03-13	Common Stock	M	1623	$60.105	Acquired	24048	Direct
2013-03-13	Common Stock	M	1295	$45.83	Acquired	25343	Direct
2013-03-13	Common Stock	S	316	$94.2701	Disposed	25027	Direct
2013-03-13	Common Stock	S	700	$94.3	Disposed	24327	Direct
2013-03-13	Common Stock	S	100	$94.31	Disposed	24227	Direct
2013-03-13	Common Stock	S	200	$94.32	Disposed	24027	Direct
2013-03-13	Common Stock	S	3750	$94.4	Disposed	20277	Direct
2013-03-13	Common Stock	S	543	$94.41	Disposed	19734	Direct
2013-03-13	Common Stock	S	1000	$94.35	Disposed	18734	Direct
2013-03-13	Common Stock	S	2700	$94.4	Disposed	16034	Direct
2013-03-13	Common Stock	S	200	$94.4201	Disposed	15834	Direct
2013-03-13	Common Stock	S	1300	$94.45	Disposed	14534	Direct
2013-03-13	Common Stock	S	100	$94.5	Disposed	14434	Direct
2013-03-13	Common Stock	S	600	$94.51	Disposed	13834	Direct
2013-03-13	Common Stock	S	328	$94.5101	Disposed	13506	Direct
2013-03-13	Common Stock	S	100	$94.53	Disposed	13406	Direct
2013-03-13	Common Stock	S	300	$94.5301	Disposed	13106	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	2691	Disposed	2020-02-26	Common Stock (2691)	Direct
2013-03-13	Employee Option (right to buy)	$60.105	M	1623	Disposed	2022-02-17	Common Stock (1623)	Direct
2013-03-13	Employee Option (right to buy)	$45.83	M	1295	Disposed	2021-02-18	Common Stock (1295)	Direct