SEC Form 4 · accession 0001567619-18-006128

WESTLAKE CORP · WLK

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

Reporting owner

Albert Chao

Officer — President & CEO · Director · 10% Owner

Period of report

Nov 12, 2018

Accepted (ET)

Nov 14, 2018 · 1:14 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 12, 2018	M	38,973	$7.12	A	321,374	D
Common stock^F1	Nov 12, 2018	S	18,100	$74.30	D	303,274	D
Common stock^F2	Nov 12, 2018	S	6,900	$75.10	D	296,374	D
Common Stock	Nov 13, 2018	M	25,000	$7.12	A	321,374	D
Common stock^F3	Nov 13, 2018	S	10,200	$71.28	D	311,174	D
Common stock^F4	Nov 13, 2018	S	3,600	$72.47	D	307,574	D
Common stock^F5	Nov 13, 2018	S	1,200	$73.20	D	306,374	D
Common Stock^F7	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)^F6	$7.12	Nov 12, 2018	M	38,973	D	—	Feb 13, 2019	Common Stock	38,973	116,919	D
Employee Option (right to buy)^F6	$7.12	Nov 13, 2018	M	25,000	D	—	Feb 13, 2019	Common Stock	25,000	91,919	D

Explanation of responses

F1The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $73.82 to $74.82, 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 $74.83 to $75.38, 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $71.00 to $71.99, 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.
F4The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $72.02 to $72.85, 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.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $73.12 to $73.32, 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.
F6The stock options are excercisable in three equal installments on February 13, 2009, 2010 and 2011.
F792,010,554 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.