WESTLAKE CORP — Director's Dealing 2011

Feb 22, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2011-02-18

Reporting Person: Chao James (Director, Chairman, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-18	Common Stock	A	8670	$00	Acquired	96607	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-18	Employee Option (right to buy)	$45.83	A	20672	Acquired	2021-02-18	Common Stock (20672)	Direct
2011-02-18	Employee Option (right to buy)	$45.83	A	27574	Acquired	2021-02-18	Common Stock (27574)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	20000	Indirect
Common Stock	129271	Indirect
Common Stock	46005277	Indirect

Footnotes

F1: The shares of restricted stock will vest on February 18, 2014.

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.

F3: The stock options are exercisable in three equal installments on February 18, 2012, 2013 and 2014.

F4: Even though reporting person and reporting person's brother, Albert Chao, share a household, 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.