WESTLAKE CORP — Director's Dealing 2017

Aug 22, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2017-08-21

Reporting Person: Jenkins Dorothy C (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-08-21	Common Stock	M	603	—	Acquired	46721	Direct
2017-08-22	Common Stock	M	357	—	Acquired	47078	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-08-21	Restricted Stock Units	$	M	603	Disposed		Common Stock (603)	Direct
2017-08-22	Restricted Stock Units	$	M	357	Disposed		Common Stock (357)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	92010554	Indirect

Footnotes

F1: Restricted stock units convert into the Issuer's shares of common stock on a one-to-one basis.

F2: 92,010,554 shares of the common stock of the Issuer are held by TTWF LP, a Delaware limited partnership. Two trusts for the benefit of members of the Chao family, including the reporting person, are the managers of TTWFGP LLC, a Delaware limited liability company, which is the general partner of TTWF LP. The limited partners of TTWF LP are five trusts, principally for the benefit of members of the Chao family, including the reporting person, and two corporations owned, indirectly or directly, by certain of these trusts and by other entities owned by members of the Chao family, including the reporting person. The reporting person shares voting and dispositive power with respect to the shares of the common stock beneficially owned by TTWF LP. The reporting person disclaims beneficial ownership of the shares except to the extent of her pecuniary interest therein.

F3: On August 21, 2015, the reporting person was granted 1,809 restricted stock units vesting in three equal installments beginning on the first anniversary of the grant date.

F4: On August 22, 2014, the reporting person was granted 1,071 restricted stock units vesting in three equal installments beginning on the first anniversary of the grant date.