WESTLAKE CORP — Director's Dealing 2015

Aug 25, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2015-08-22

Reporting Person: RILEY H JOHN JR (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-08-22	Common Stock	M	357	—	Acquired	18555	Direct
2015-08-23	Common Stock	M	586	—	Acquired	19141	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-08-22	Restricted Stock Units	$	M	357	Disposed		Common Stock (357)	Direct
2015-08-23	Restricted Stock Units	$	M	586	Disposed		Common Stock (586)	Direct

Footnotes

F1: Restricted stock units convert into Issuer's common stock on a one-for-one basis.

F2: On August 22, 2014, the reporting person was granted 1,071 restricted stock units vesting in three equal annual installments beginning on the first anniversary of the grant date.

F3: On August 23, 2013, the reporting person was granted 1,760 restricted stock units (such number takes into account the Issuer's two-for-one stock split on March 18, 2014) vesting in three equal annual installments beginning on the first anniversary of the grant date.