WESTLAKE CORP — Director's Dealing 2016

Aug 24, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2016-08-22

Reporting Person: Graff Michael J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-08-22	Common Stock	M	603	—	Acquired	2132	Direct
2016-08-22	Common Stock	M	357	—	Acquired	2489	Direct
2016-08-23	Common Stock	M	588	—	Acquired	3077	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-08-22	Restricted Stock Units	$	M	603	Disposed		Common Stock (603)	Direct
2016-08-22	Restricted Stock Units	$	M	357	Disposed		Common Stock (357)	Direct
2016-08-23	Restricted Stock Units	$	M	588	Disposed		Common Stock (588)	Direct

Footnotes

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

F2: On August 21, 2015, the reporting person was granted 1,809 restricted stock units vesting in three equal annual installments beginning on the first anniversary of the grant date.

F3: 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.

F4: 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.