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Filing Details

Accession Number:: 0001140361-10-044528
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2010-11-09 16:17:41
Reporting Period:: 2010-11-05

Filing Date:: 2010-11-09
Accepted Time:: 2010-11-09 16:17:41
SEC Url:: Form 4 Filing

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
1298632	R David Hansen	2801 Post Oak Blvd. Suite 600 Houston TX 77056	Sr Vp Administration	No	Yes	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2010-11-05	6,617	$14.24	33,851	No	4	M	Direct
Common Stock	Acquisiton	2010-11-05	6,062	$19.29	39,913	No	4	M	Direct
Common Stock	Disposition	2010-11-05	79	$36.03	39,834	No	4	S	Direct
Common Stock	Disposition	2010-11-05	600	$36.04	39,234	No	4	S	Direct
Common Stock	Disposition	2010-11-05	2,500	$36.09	36,734	No	4	S	Direct
Common Stock	Disposition	2010-11-05	29	$36.10	36,705	No	4	S	Direct
Common Stock	Disposition	2010-11-05	1,150	$36.11	35,555	No	4	S	Direct
Common Stock	Disposition	2010-11-05	500	$36.12	35,055	No	4	S	Direct
Common Stock	Disposition	2010-11-05	100	$36.13	34,955	No	4	S	Direct
Common Stock	Disposition	2010-11-05	800	$36.14	34,155	No	4	S	Direct
Common Stock	Disposition	2010-11-05	1,158	$36.15	32,997	No	4	S	Direct
Common Stock	Disposition	2010-11-05	900	$36.16	32,097	No	4	S	Direct
Common Stock	Disposition	2010-11-05	400	$36.17	31,697	No	4	S	Direct
Common Stock	Disposition	2010-11-05	903	$36.18	30,794	No	4	S	Direct
Common Stock	Disposition	2010-11-05	100	$36.19	30,694	No	4	S	Direct
Common Stock	Disposition	2010-11-05	1,438	$36.19	29,256	No	4	S	Direct
Common Stock	Disposition	2010-11-05	100	$36.19	29,156	No	4	S	Direct
Common Stock	Disposition	2010-11-05	209	$36.20	28,947	No	4	S	Direct
Common Stock	Disposition	2010-11-05	100	$36.21	28,847	No	4	S	Direct
Common Stock	Disposition	2010-11-05	700	$36.21	28,147	No	4	S	Direct
Common Stock	Disposition	2010-11-05	313	$36.22	27,834	No	4	S	Direct
Common Stock	Disposition	2010-11-05	100	$36.23	27,734	No	4	S	Direct
Common Stock	Disposition	2010-11-05	100	$36.24	27,634	No	4	S	Direct
Common Stock	Disposition	2010-11-05	400	$36.28	27,234	No	4	S	Direct

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

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Option (right to buy) (Common Stock)	Acquisiton	2010-11-05	6,617	$0.00	6,617	$14.24
Common Stock	Employee Option (right to buy)	Acquisiton	2010-11-05	6,062	$0.00	6,062	$19.29

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
13,236	2010-02-13	2019-02-13	No	4	M	Direct
3,031	2010-02-15	2018-02-15	No	4	M	Direct