[Form 4] Westlake Corporation Insider Trading Activity

Rhea-AI Filing Summary

Westlake Corporation director Kimberly S. Lubel reported restricted stock unit activity and changes in her direct ownership. On 08/08/2025 she acquired 2,168 restricted stock units that convert one-for-one into common stock and are stated to vest on August 8, 2026. A separate reported transaction on 08/09/2025 involves 1,128 restricted stock units (transaction code M) that the form notes were granted on 08/09/2024 and vest on their first anniversary. Following the reported transactions the form shows 11,653 shares of Westlake common stock beneficially owned by the reporting person in a direct ownership form. The filing lists the reporting persons relationship to the issuer as a director.

Positive

• 2,168 restricted stock units acquired on 08/08/2025 that convert one-for-one into common stock
• All 2,168 RSUs vest on August 8, 2026 as stated in the filing
• Reported direct beneficial ownership of 11,653 shares following the reported transactions

Negative

• None.

Insights

Securities Analyst

TL;DR: Director reported RSU award and related RSU transaction, resulting in 11,653 shares beneficially owned.

The Form 4 discloses a 2,168-RSU acquisition on 08/08/2025 that converts one-for-one to common stock and vests on 08/08/2026, plus a separate RSU-related transaction of 1,128 units on 08/09/2025. The reporting person is identified as a director and the ownership reported is direct. For investors, this is a routine equity-compensation disclosure showing incremental share-based holdings rather than an internal transfer or large disposition; the form does not state any cash proceeds or sales tied to these entries.

Corporate Governance Expert

TL;DR: Governance disclosure shows standard equity awards with vesting schedule; no corrective action or unusual governance event reported.

The submission specifies that the restricted stock units convert one-for-one to common stock and that the newly reported units from 08/08/2025 vest on 08/08/2026. The form explicitly notes prior grant timing for the 1,128 RSUs (08/09/2024) and their one-year vesting. The reporting persons role is listed as director and ownership is direct. These items are material for ownership tracking and insider disclosure but do not, on their face, indicate governance changes or disputes.

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^*

Lubel Kimberly S

(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)	11,653	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.

	Kimberly S. Lubel 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.
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.

FAQ

What insider activity did Westlake (WLK) report for Kimberly S. Lubel?

K. Lubel acquired 2,168 RSUs on 08/08/2025 and had a separate RSU-related transaction of 1,128 units on 08/09/2025; beneficial ownership is reported as 11,653 shares.

When do the reported restricted stock units vest?

The 2,168 RSUs acquired on 08/08/2025 vest on August 8, 2026. The 1,128 RSUs were granted on 08/09/2024 and vest on their first anniversary, per the form.

How many Westlake shares does Kimberly Lubel beneficially own after these transactions?

11,653 shares of Westlake common stock are reported as directly beneficially owned following the reported activity.

What is the conversion rate of the restricted stock units reported?

Each restricted stock unit converts one-for-one into the issuers common stock, as stated in the filing.

What is Kimberly Lubels relationship to Westlake listed on the Form 4?

She is listed as a director on the Form 4.