Westlake director converts 2,168 RSUs into stock

Westlake Corp director Michael J. Graff reported an automatic conversion of 2,168 restricted stock units into common stock on August 8, 2026.

Rhea-AI Filing Summary

Westlake Corp director Michael J. Graff reported an automatic conversion of 2,168 restricted stock units into common stock on August 8, 2026. The restricted stock units converted into common shares on a one-for-one basis, stemming from a grant made on August 8, 2025 that vested on its first anniversary. Following the conversion, Graff directly held 23,310 shares of Westlake common stock.

Insider Trade Summary

2,168 shares exercised/converted

Exercise 2 txns

Insider Graff Michael J

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 — 23,310 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 restricted stock units Common shares issued: 2,168 shares Post-transaction holdings: 23,310 shares +2 more

5 metrics

RSUs converted 2,168 restricted stock units Restricted stock units converted into common stock on August 8, 2026

Common shares issued 2,168 shares Common stock received upon one-for-one RSU conversion

Post-transaction holdings 23,310 shares Directly held Westlake Corp common stock after the transaction

RSU grant date August 8, 2025 Date 2,168 restricted stock units were granted to the reporting person

Vesting period First anniversary of grant date RSUs vested on the first anniversary of the August 8, 2025 grant

Key Terms

Restricted Stock Units, derivative security, vesting

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

"transaction_code_description: 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.

vesting financial

"restricted stock units vesting on the first anniversary of the grant date"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

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

What insider transaction did Westlake Corp (WLK) director Michael J. Graff report?

Michael J. Graff reported the conversion of 2,168 restricted stock units into Westlake Corp common stock on August 8, 2026, increasing his directly held common shares to 23,310.

How many Westlake Corp (WLK) shares does Michael J. Graff hold after this Form 4?

After the reported transaction, Michael J. Graff directly holds 23,310 shares of Westlake Corp common stock, reflecting the addition of 2,168 shares from the restricted stock unit conversion.

What derivative security did Michael J. Graff convert in this Westlake Corp (WLK) Form 4?

Graff converted 2,168 Restricted Stock Units, which according to a footnote convert into Westlake Corp common stock on a one-for-one basis, resulting in the issuance of 2,168 common shares.

When were the Westlake Corp (WLK) restricted stock units granted to Michael J. Graff?

The footnotes state that Graff was granted 2,168 restricted stock units on August 8, 2025, with the units vesting on the first anniversary of the grant date, leading to the August 8, 2026 conversion.

Was Michael J. Graff’s Westlake Corp (WLK) transaction under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked as an affirmed trading plan, and there is no footnote indicating a pre-arranged Rule 10b5-1 trading arrangement for this restricted stock unit conversion.

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

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Accepted by SEC EDGAR 08/10/2026 - 01:51 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^*

Graff Michael J

(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)	23,310	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.

	Michael Graff 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)