WESTLAKE CORP — Director's Dealing 2012

Nov 27, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2012-11-23

Reporting Person: Chao Albert (Director, President & CEO, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-11-23	Common Stock	M	9000	$14.5	Acquired	129875	Direct
2012-11-23	Common Stock	M	5000	$27.22	Acquired	134875	Direct
2012-11-23	Common Stock	M	5000	$36.1	Acquired	139875	Direct
2012-11-23	Common Stock	M	20000	$14.235	Acquired	159875	Direct
2012-11-23	Common Stock	S	3750	$76	Disposed	156125	Direct
2012-11-23	Common Stock	S	4299	$76.01	Disposed	151826	Direct
2012-11-23	Common Stock	S	100	$76.02	Disposed	151726	Direct
2012-11-23	Common Stock	S	100	$76.03	Disposed	151626	Direct
2012-11-23	Common Stock	S	51	$76.04	Disposed	151575	Direct
2012-11-23	Common Stock	S	100	$76.05	Disposed	151475	Direct
2012-11-23	Common Stock	S	600	$76.08	Disposed	150875	Direct
2012-11-23	Common Stock	S	700	$76.1	Disposed	150175	Direct
2012-11-23	Common Stock	S	74	$76.11	Disposed	150101	Direct
2012-11-23	Common Stock	S	100	$76.14	Disposed	150001	Direct
2012-11-23	Common Stock	S	100	$76.15	Disposed	149901	Direct
2012-11-23	Common Stock	S	845	$76.19	Disposed	149056	Direct
2012-11-23	Common Stock	S	3026	$76.2	Disposed	146030	Direct
2012-11-23	Common Stock	S	200	$76.2001	Disposed	145830	Direct
2012-11-23	Common Stock	S	100	$76.21	Disposed	145730	Direct
2012-11-23	Common Stock	S	2000	$76.2501	Disposed	143730	Direct
2012-11-23	Common Stock	S	900	$76.27	Disposed	142830	Direct
2012-11-23	Common Stock	S	155	$76.28	Disposed	142675	Direct
2012-11-23	Common Stock	S	500	$76.38	Disposed	142175	Direct
2012-11-23	Common Stock	S	300	$76.47	Disposed	141875	Direct
2012-11-23	Common Stock	S	400	$76.49	Disposed	141475	Direct
2012-11-23	Common Stock	S	1600	$76.4901	Disposed	139875	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-11-23	Employee Option (right to buy)	$14.50	M	9000	Acquired	2014-08-16	Common Stock (9000)	Direct
2012-11-23	Employee Option (right to buy)	$27.22	M	5000	Acquired	2015-08-31	Common Stock (5000)	Direct
2012-11-23	Employee Option (right to buy)	$36.10	M	5000	Acquired	2016-03-15	Common Stock (5000)	Direct
2012-11-23	Employee Option (right to buy)	$14.235	M	20000	Acquired	2019-02-13	Common Stock (20000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	20000	Indirect
Common Stock	115842	Indirect
Common Stock	46005277	Indirect

Footnotes

F1: The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

F2: The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.