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Filing Details

Accession Number:: 0001140361-12-049495
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2012-12-03 16:56:24
Reporting Period:: 2012-11-29

Filing Date:: 2012-12-03
Accepted Time:: 2012-12-03 16:56:24
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
1243147	William E Barnett	2801 Post Oak Blvd. Houston TX 77056		Yes	No	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	2012-11-29	1,345	$30.07	11,904	No	4	M	Direct
Common Stock	Acquisiton	2012-11-29	2,661	$24.51	14,565	No	4	M	Direct
Common Stock	Acquisiton	2012-11-29	3,826	$21.00	18,391	No	4	M	Direct
Common Stock	Acquisiton	2012-11-30	1,920	$27.13	20,311	No	4	M	Direct
Common Stock	Disposition	2012-11-29	4,972	$72.40	15,339	No	4	S	Direct
Common Stock	Disposition	2012-11-29	200	$72.41	15,139	No	4	S	Direct
Common Stock	Disposition	2012-11-29	600	$72.42	14,539	No	4	S	Direct
Common Stock	Disposition	2012-11-29	200	$72.49	14,339	No	4	S	Direct
Common Stock	Disposition	2012-11-29	400	$72.52	13,939	No	4	S	Direct
Common Stock	Disposition	2012-11-29	400	$72.53	13,539	No	4	S	Direct
Common Stock	Disposition	2012-11-29	200	$72.58	13,339	No	4	S	Direct
Common Stock	Disposition	2012-11-29	200	$72.61	13,139	No	4	S	Direct
Common Stock	Disposition	2012-11-29	400	$72.62	12,739	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.63	12,639	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.64	12,539	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.65	12,439	No	4	S	Direct
Common Stock	Disposition	2012-11-29	200	$72.66	12,239	No	4	S	Direct
Common Stock	Disposition	2012-11-29	400	$72.67	11,839	No	4	S	Direct
Common Stock	Disposition	2012-11-29	380	$72.70	11,459	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.70	11,359	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.71	11,259	No	4	S	Direct
Common Stock	Disposition	2012-11-29	400	$72.71	10,859	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.72	10,759	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.72	10,659	No	4	S	Direct
Common Stock	Disposition	2012-11-29	100	$72.74	10,559	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
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)	Acquisiton	2012-11-29	1,345	$0.00	1,345	$30.07
Common Stock	Employee Option (right to buy)	Acquisiton	2012-11-29	2,661	$0.00	2,661	$24.51
Common Stock	Employee Option (right to buy)	Acquisiton	2012-11-29	3,826	$0.00	3,826	$21.00
Common Stock	Employee Option (right to buy)	Acquisiton	2012-11-29	1,920	$0.00	1,920	$27.13

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2010-08-21	2016-08-21	No	4	M	Direct
888	2012-08-20	2019-08-20	No	4	M	Direct
0	2012-08-15	2018-08-15	No	4	M	Direct
0	2011-08-17	2017-08-17	No	4	M	Direct