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Filing Details

Accession Number:: 0001567619-20-019004
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2020-11-10 10:05:16
Reporting Period:: 2020-11-06

Accepted Time:: 2020-11-10 10:05:16
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1262823	Westlake Chemical Corp	WLK	Industrial Organic Chemicals (2860)	760346924

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1299403	Albert Chao	2801 Post Oak Boulevard, Suite 600 Houston TX 77056	President & Ceo	Yes	Yes	Yes	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2020-11-06	55,148	$22.92	482,804	No	4	M	Direct
Common Stock	Disposition	2020-11-06	28,638	$72.08	454,166	No	4	S	Direct
Common Stock	Disposition	2020-11-06	11,978	$73.30	442,188	No	4	S	Direct
Common Stock	Disposition	2020-11-06	10,334	$74.29	431,854	No	4	S	Direct
Common Stock	Disposition	2020-11-06	4,198	$75.12	427,656	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Option (right to buy)	Disposition	2020-11-06	55,148	$0.00	55,148	$22.92

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2021-02-18	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	93,405,554	Indirect	TTWF LP & TTWF GP LLC

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $71.80 to $72.80, 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.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $72.82 to $73.79, 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.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $73.89 to $74.87, 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.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $74.96 to $75.23, 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.
The stock options are excercisable in three equal installments on February 18, 2012, 2013 and 2014.
93,405,554 shares of Issuer are held through TTWF LP, a Delaware limited partnership, and TTWF GP LLC, a Delaware limited liability company and the general partner of TTWF LP. Two trusts for the benefit of members of the Chao family, including the reporting person, are the managers of TTWFGP LLC. 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 and TTWFGP LLC. The reporting person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.