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: 2011-02-17

Reporting Person: Wallace Stephen (VP, General Counsel, Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-17	Common Stock	F	1065	$43.41	Disposed	26221	Direct
2011-02-17	Common Stock	F	19	$43.64	Disposed	26202	Direct
2011-02-18	Common Stock	A	1629	$00	Acquired	27831	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	3885	Acquired	2021-02-18	Common Stock (3885)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	200	Indirect

Footnotes

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

F2: The stock options are exercisable in three equal installments on February 18, 2012, 2013 and 2014.