WESTLAKE CORP — Director's Dealing 2017

Mar 4, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2017-03-01

Reporting Person: Buesinger Robert F. (Sr. Vice President, Vinyls)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-03-01	Common Stock	M	3748	$45.6975	Acquired	13057	Direct
2017-03-01	Common Stock	M	4445	$44.42	Acquired	17502	Direct
2017-03-01	Common Stock	S	8193	$66.25	Disposed	9309	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-03-01	Employee Option (right to buy)	$45.6975	M	3748	Disposed	2023-02-15	Common Stock (3748)	Direct
2017-03-01	Employee Option (right to buy)	$44.42	M	4445	Disposed	2026-02-18	Common Stock (4445)	Direct

Footnotes

F1: The stock options are exercisable in three installments of 33%, 33% and 34% on February 15, 2014, 2015, and 2016, respectively.

F2: The stock options are exercisable in three installments of 33%, 33% and 34% on February 18, 2017, 2018, and 2019, respectively.