Westlake (WLK) insider filing: 2,168 RSUs and 1,128-unit transaction disclosed

Rhea-AI Filing Summary

Westlake Corporation (WLK) insider filing shows director Carolyn C. Sabat reported equity award activity on Form 4. The filing records restricted stock unit (RSU) transactions dated 08/08/2025 and 08/09/2025. The RSUs convert into common stock on a one-for-one basis and all RSUs will vest on August 8, 2026. The filing lists an acquisition of 2,168 RSUs on 08/08/2025 and a transaction involving 1,128 RSUs on 08/09/2025, with the entries showing the number of underlying common shares associated with each RSU line.

The reporting person is identified as a director of the issuer. The form is signed by Carolyn C. Sabat by POA J Feng and dated 08/11/2025. The document provides specific grant, conversion, and vesting details but does not include additional context such as exercise prices beyond $0 for the RSUs or the economic rationale for the transactions.

Positive

• Clear disclosure of RSU awards with conversion terms: RSUs convert one-for-one into common stock
• Explicit vesting schedule provided: all RSUs will vest on August 8, 2026
• Reporting person identified as a director, improving transparency for investors

Negative

• None.

Insights

Securities Analyst

TL;DR: Routine insider equity awards recorded; RSUs convert one-for-one and vest 08/08/2026.

The Form 4 documents compensation-related equity activity for director Carolyn C. Sabat. It shows a grant/acquisition event for 2,168 restricted stock units dated 08/08/2025 and a separate RSU-related transaction of 1,128 units dated 08/09/2025. The filing explicitly states RSUs convert into common stock on a one-for-one basis and that all RSUs will vest on August 8, 2026. The form is executed by POA J Feng on 08/11/2025. From a reporting perspective this is a clear, specific disclosure of equity compensation and resulting beneficial ownership changes; it contains no additional financial performance or cash transaction details.

Corporate Governance Expert

TL;DR: Disclosure appears routine for director compensation; vesting schedule and conversion terms are clearly stated.

The filing identifies the reporting person as a director and discloses restricted stock units with explicit conversion (one-for-one) and a stated vesting date of August 8, 2026. The record includes transaction dates (08/08/2025 and 08/09/2025) and shows the numbers of RSUs involved (2,168 and 1,128). The presence of a POA signature and the clear explanatory notes meet standard disclosure expectations for director equity awards. The filing does not disclose any departures from routine award practice or governance concerns within the document itself.

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
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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 TX 77056

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
08/08/2025

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

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

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

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	08/09/2025		M		1,128	A	(1)	3,580	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)	08/08/2025		A		2,168		(2)	(2)	Common Stock	2,168	$0	2,168	D
Restricted Stock Units	(1)	08/09/2025		M			1,128	(3)	(3)	Common Stock	1,128	$0	0	D

Explanation of Responses:

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

2. All of the restricted stock units will vest on August 8, 2026.

3. On August 9, 2024 the reporting person was granted 1,128 restricted stock units vesting on the first anniversary of the grant date.

	Carolyn C. Sabat by J Feng POA	08/11/2025
	** 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.
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FAQ

What did the WLK Form 4 filed by Carolyn C. Sabat report?

The Form 4 reports restricted stock unit transactions dated 08/08/2025 and 08/09/2025, including an acquisition of 2,168 RSUs and an RSU-related transaction of 1,128 units.

How do the RSUs reported for WLK convert into common stock?

The filing states the restricted stock units convert into the issuer's common stock on a one-for-one basis.

When do the reported RSUs for WLK vest?

All of the restricted stock units covered by this filing will vest on August 8, 2026.

What is Carolyn C. Sabat's relationship to Westlake (WLK)?

The Form 4 identifies Carolyn C. Sabat as a director of the issuer.

Who signed the Form 4 and when was it filed?

The form is signed as Carolyn C. Sabat by J Feng POA and dated 08/11/2025.