SEC Form 4 · accession 0001140361-17-043827

WESTLAKE CORP · WLK

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

James Chao

Officer — Chairman · Director · 10% Owner

Period of report

Nov 22, 2017

Accepted (ET)

Nov 27, 2017 · 12:33 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001262823

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock	Nov 22, 2017	M	10,109	$45.6975	A	129,078	D
Common Stock^F1	Nov 22, 2017	S	10,109	$95.203	D	118,969	D
Common Stock	Nov 24, 2017	M	10,109	$45.6975	A	129,078	D
Common Stock	Nov 24, 2017	M	23,917	$68.09	A	152,995	D
Common Stock	Nov 24, 2017	M	32,000	$63.9775	A	184,995	D
Common Stock^F2	Nov 24, 2017	S	66,026	$94.611	D	118,969	D
Common Stock^F6	holding	—	—		—	92,010,554	I	TTWF LP & TTWFGP LLC

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Employee Option (right to buy)^F3	$45.6975	Nov 22, 2017	M	10,109	D	—	Feb 15, 2023	Common Stock	10,109	10,109	D
Employee Option (right to buy)^F3	$45.6975	Nov 24, 2017	M	10,109	D	—	Feb 15, 2023	Common Stock	10,109	0	D
Employee Option (right to buy)^F4	$68.09	Nov 24, 2017	M	23,917	D	—	Feb 20, 2025	Common Stock	23,917	12,321	D
Employee Option (right to buy)^F5	$63.9775	Nov 24, 2017	M	32,000	D	—	Feb 14, 2024	Common Stock	32,000	0	D

Explanation of responses

F1The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $95.00 to $95.40, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.11 to $94.90, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote
F3The stock options are excercisable in three equal installments on February 15, 2014, 2015 and 2016.
F4The stock options are excercisable in three equal installments on February 20, 2016, 2017 and 2018.
F5The stock options are excercisable in three equal installments on February 14, 2015, 2016 and 2017.
F692,010,554 shares of Issuer are held through 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 that 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 investment and voting power with respect to the shares beneficially owned by TTWF LP. The reporting person disclaims beneficial ownership of the shares except to the extent of her pecuniary interest therein.