Thomas J. Janssens - Mar 1, 2022 Form 3/A - Amendment Insider Report for WESTLAKE CORP (WLK)

Role: SVP, Operations-PEM & Corp Log
Signature: Thomas J. Janssens by J. Feng POA
Stock symbol: WLK
Transactions as of: Mar 1, 2022
Transactions value $: $0
Form type: 3/A - Amendment
Date filed: 3/15/2022, 03:42 PM
Date Of Original Report: Mar 1, 2022
Next filing: Mar 15, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	WLK	Common Stock						6.77K	Mar 1, 2022	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	WLK	Restricted Stock Units							Mar 1, 2022	Common Stock	1.54K		Direct	F2, F3
holding	WLK	Restricted Stock Units							Mar 1, 2022	Common Stock	3.04K		Direct	F2, F4
holding	WLK	Restricted Stock Units							Mar 1, 2022	Common Stock	1.17K		Direct	F2, F5
holding	WLK	Restricted Stock Units							Mar 1, 2022	Common Stock	1.31K		Direct	F2, F6
holding	WLK	Employee Option (right to buy)							Mar 1, 2022	Common Stock	2.49K	$107.75	Direct	F7
holding	WLK	Employee Option (right to buy)							Mar 1, 2022	Common Stock	4.34K	$79.83	Direct	F8
holding	WLK	Employee Option (right to buy)							Mar 1, 2022	Common Stock	6.51K	$65.81	Direct	F9
holding	WLK	Employee Option (right to buy)							Mar 1, 2022	Common Stock	4.02K	$86.54	Direct	F10
holding	WLK	Employee Option (right to buy)							Mar 1, 2022	Common Stock	4.15K	$108.12	Direct	F11

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Due to a rounding error, discovered on March 15, 2022, the original Form 3 filed on behalf of the Reporting Person on March 2, 2022 (the 'Original Form 3') reported beneficial ownership of 6,766 shares of common stock. This Form 3/A amends that filing to reflect the correct amount of 6,765 shares of common stock. Beneficial Ownership in Table II of the Original Form 3 remains the same, other than conforming changes in footnote numbering.
F2	Each restricted stock unit ("RSU") represents the right to receive one share of common stock upon vesting.
F3	The RSUs were granted February 14, 2020 and vest on the third anniversary of the grant date.
F4	The RSUs were granted February 14, 2020 and vest on the fifth anniversary of the grant date.
F5	The RSUs were granted February 19, 2021 and vest on the third anniversary of the grant date.
F6	The RSUs were granted February 18, 2022 and vest on the third anniversary of the grant date.
F7	These Stock Options were granted February 16, 2018 and are exercisable by the Reporting Person.
F8	These Stock Options were granted February 15, 2019 and are exercisable by the Reporting Person.
F9	These Stock Options were granted February 14, 2020. 66% of the 6,507 Stock Options granted have vested and are excercisable; the remaining 34% will vest on February 14, 2023.
F10	These Stock Options were granted February 19, 2021. 33% of the 4,020 Stock Options granted have vested and are excercisable; the remaining Stock Options will vest at 33% on February 19, 2023 and at 34% on February 19, 2024.
F11	These Stock Options were granted February 18, 2022 and are excercisable in three installments of 33%, 33% and 34% on February 18, 2023, 2024 and 2025, respectively.