WESTLAKE CORP — Director's Dealing 2016

Nov 17, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2016-11-15

Reporting Person: Mattina Michael J. (Sr. VP, Polyethylene)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-11-15	Common Stock	M	15358	$15.805	Acquired	21421	Direct
2016-11-15	Common Stock	M	1334	$30.0525	Acquired	22755	Direct
2016-11-15	Common Stock	M	1582	$45.6975	Acquired	24337	Direct
2016-11-15	Common Stock	S	18274	$53.78	Disposed	6063	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-11-15	Employee Option (right to buy)	$15.805	M	15358	Disposed	2017-02-23	Common Stock (15358)	Direct
2016-11-15	Employee Option (right to buy)	$30.0525	M	1334	Disposed	2022-02-17	Common Stock (1334)	Direct
2016-11-15	Employee Option (right to buy)	$45.6975	M	1582	Disposed	2023-02-15	Common Stock (1582)	Direct

Footnotes

F1: The stock options are exercisable in two equal installments on February 23, 2012 and August 23, 2016.

F2: The stock options are exercisable in three installments of 33%, 33% and 34% on February 17, 2013, 2014, and 2015, respectively.

F3: The stock options are exercisable in three installments of 33%, 33% and 34% on February 15, 2014, 2015, and 2016, respectively.