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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1262823	Westlake Chemical Corp	WLK	Industrial Organic Chemicals (2860)	760346924

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1298551	L Jeffrey Taylor	2801 Post Oak Blvd. Houston TX 77056	Sr Vp, Polyethylene	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2012-08-09	2,922	$20.53	20,068	No	4	M	Direct
Common Stock	Acquisiton	2012-08-09	2,107	$27.22	22,175	No	4	M	Direct
Common Stock	Acquisiton	2012-08-09	3,058	$31.61	25,233	No	4	M	Direct
Common Stock	Acquisiton	2012-08-09	1,128	$3,610.00	26,361	No	4	M	Direct
Common Stock	Disposition	2012-08-09	1,449	$66.97	24,912	No	4	S	Direct
Common Stock	Disposition	2012-08-09	500	$66.99	24,412	No	4	S	Direct
Common Stock	Disposition	2012-08-09	930	$67.00	23,482	No	4	S	Direct
Common Stock	Disposition	2012-08-09	345	$67.02	23,137	No	4	S	Direct
Common Stock	Disposition	2012-08-09	100	$67.05	23,037	No	4	S	Direct
Common Stock	Disposition	2012-08-09	349	$67.06	22,688	No	4	S	Direct
Common Stock	Disposition	2012-08-09	679	$67.07	22,009	No	4	S	Direct
Common Stock	Disposition	2012-08-09	400	$67.08	21,609	No	4	S	Direct
Common Stock	Disposition	2012-08-09	431	$67.10	21,178	No	4	S	Direct
Common Stock	Disposition	2012-08-09	715	$67.12	20,463	No	4	S	Direct
Common Stock	Disposition	2012-08-09	301	$67.13	20,162	No	4	S	Direct
Common Stock	Disposition	2012-08-09	661	$67.14	19,501	No	4	S	Direct
Common Stock	Disposition	2012-08-09	1,145	$67.15	18,356	No	4	S	Direct
Common Stock	Disposition	2012-08-09	100	$67.15	18,256	No	4	S	Direct
Common Stock	Disposition	2012-08-09	1,500	$67.16	16,756	No	4	S	Direct
Common Stock	Disposition	2012-08-09	415	$67.18	16,341	No	4	S	Direct
Common Stock	Disposition	2012-08-09	200	$67.19	16,141	No	4	S	Direct
Common Stock	Disposition	2012-08-09	1,500	$67.20	14,641	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Options (right to buy)	Acquisiton	2012-08-09	2,922	$0.00	2,922	$20.53
Common Stock	Employee Option (right to buy)	Acquisiton	2012-08-09	2,107	$0.00	2,107	$27.22
Common Stock	Employee Options (right to buy)	Acquisiton	2012-08-09	3,058	$0.00	3,058	$31.61
Common Stock	Employee Options (right to buy)	Acquisiton	2012-08-09	1,128	$0.00	1,128	$36.10

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
2,922	2012-02-26	2020-02-26	No	4	M	Direct
0	2009-08-31	2015-08-31	No	4	M	Direct
0	2010-02-23	2017-02-23	No	4	M	Direct
0	2010-03-15	2016-03-15	No	4	M	Direct