Westlake director converts 2,168 RSUs into shares

Westlake Corp director Carolyn Chao Sabat exercised previously granted 2,168 Restricted Stock Units, converting them into 2,168 shares of common stock on a one-for-one basis.

Rhea-AI Filing Summary

Westlake Corp director Carolyn Chao Sabat exercised previously granted 2,168 Restricted Stock Units, converting them into 2,168 shares of common stock on a one-for-one basis. The award was originally granted on August 8, 2025 and vested on its first anniversary. Following this conversion, she directly holds 5,748 shares of Westlake common stock.

Insider Trade Summary

2,168 shares exercised/converted

Exercise 2 txns

Insider Sabat Carolyn Chao

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F1, F2	2,168	$0.00	$0.00
Exercise	Common Stock F1	2,168	--	--

Holdings After Transaction: Restricted Stock Units — 2,168 contracts (Direct); Common Stock — 5,748 shares (Direct)

Footnotes (2)

1. F1. Restricted stock units convert into the Issuer's common stock on a one-for-one basis.
2. F2. On August 8, 2025 the reporting person was granted 2,168 restricted stock units vesting on the first anniversary of the grant date.

Key Figures

RSUs converted: 2,168 units Shares received: 2,168 shares Holdings after transaction: 5,748 shares +1 more

4 metrics

RSUs converted 2,168 units Restricted Stock Units converting into common stock on a one-for-one basis

Shares received 2,168 shares Common stock acquired upon RSU vesting and conversion on August 8, 2026

Holdings after transaction 5,748 shares Total direct Westlake common stock held by Carolyn Chao Sabat after the RSU conversion

RSU grant date August 8, 2025 Original grant date of the 2,168 Restricted Stock Units that vested after one year

Key Terms

Restricted Stock Units, derivative security, non-derivative

3 terms

Restricted Stock Units financial

"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

derivative security financial

"Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

non-derivative financial

"transaction_type": "non-derivative""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Westlake Corp (WLK) director Carolyn Chao Sabat report in this Form 4?

She reported the exercise of 2,168 Restricted Stock Units, which converted into 2,168 shares of Westlake common stock. This reflects the vesting and settlement of equity compensation rather than an open-market purchase or sale.

How many Westlake Corp (WLK) shares does Carolyn Chao Sabat hold after this transaction?

After the RSU conversion, she directly holds 5,748 shares of Westlake common stock. This post-transaction figure includes the 2,168 shares received upon vesting of the restricted stock units reported in this filing.

What was the size of the equity award that vested for Westlake Corp (WLK) director Sabat?

An equity award of 2,168 Restricted Stock Units vested and was settled in shares. According to the filing, these units were granted on August 8, 2025 and converted into common stock on a one-for-one basis at vesting.

Was Carolyn Chao Sabat’s Westlake Corp (WLK) transaction under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not marked as relying on a trading plan. The reported transaction reflects RSU vesting and conversion, not an open-market trade executed under a pre-arranged sales plan.

Did the Westlake Corp (WLK) Form 4 show any open-market buys or sells by the director?

No open-market purchases or sales are reported. The Form 4 reflects an exercise/conversion of 2,168 Restricted Stock Units into common shares, a compensation-related equity settlement rather than discretionary trading in the market.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/10/2026 - 01:53 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Sabat Carolyn Chao

(Last) (First) (Middle)

2801 POST OAK BLVD., STE. 600

(Street)

HOUSTON TEXAS 77056

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
WESTLAKE CORP [ WLK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/08/2026		M		2,168	A	(1)	5,748	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	08/08/2026		M			2,168	(2)	(2)	Common Stock	2,168	$0	2,168	D

Explanation of Responses:

1. Restricted stock units convert into the Issuer's common stock on a one-for-one basis.

2. On August 8, 2025 the reporting person was granted 2,168 restricted stock units vesting on the first anniversary of the grant date.

	Carolyn Sabat by J Feng POA	08/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)