WESTLAKE CORP — Director's Dealing 2018

Feb 20, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CHEMICAL CORP (WLK)
CIK: 0001262823
Period of Report: 2018-02-16

Reporting Person: Buesinger Robert F. (EVP, Vinyl Products)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-02-16	Employee Option (right to buy)	$107.75	A	9571	Acquired	2028-02-16	Common Stock (9571)	Direct
2018-02-16	Restricted Stock Units	$	A	2569	Acquired		Common Stock (2569)	Direct

Footnotes

F1: The stock options are excercisable in three installments of 33%, 33% and 34% on February 16, 2019, 2020 and 2021, respectively.

F2: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3: All of the restricted stock units will vest on February 16, 2021.