Westlake director Chao exercises 570 RSUs

Westlake Corp director John Tsung-chen Chao reported equity compensation activity involving restricted stock units and common stock.

Rhea-AI Filing Summary

Westlake Corp director John Tsung-chen Chao reported equity compensation activity involving restricted stock units and common stock. On February 17, 2026, 570 restricted stock units converted into an equal number of Westlake common shares following a grant made on February 17, 2023 that vested on the third anniversary.

On February 18, 2026, 242 of the shares otherwise issuable were withheld at a price of $98.95 per share to cover tax obligations arising from the RSU vesting. After these transactions and an ownership reconciliation that added 400 previously unreported shares, Chao directly holds 7,766 common shares of Westlake Corp.

Insider Trade Summary

570 shares exercised/converted

Exercise 3 txns

Insider Chao John Tsung-chen

Role Director

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	242	$98.95	$24K
Exercise	Restricted Stock Units	570	$0.00	$0.00
Exercise	Common Stock	570	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 0 contracts (Direct); Common Stock — 7,766 shares (Direct)

Footnotes (4)

1. F1. Restricted stock units ("RSUs") convert into the Issuer's common stock on a one-for-one basis.
2. F2. On February 17, 2023, the reporting person was granted 570 RSUs vesting on the third anniversay of the grant date.
3. F3. Shares otherwise issuable were withheld to satisfy tax obligations arising out of the vesting of the reporting persons RSUs.
4. F4. Following a reconciliation of the reporting person's ownership records, the balance includes 400 shares that were inadvertently omitted from the reporting person's prior Form 4s.

FAQ

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

What insider transactions did Westlake (WLK) director John Tsung-chen Chao report?

Director John Tsung-chen Chao reported RSU vesting and related share movements, including 570 restricted stock units converting into common stock and 242 shares withheld to cover tax obligations. These routine equity compensation events adjusted his directly held Westlake common stock balance.

How many Westlake (WLK) restricted stock units vested for John Tsung-chen Chao?

A grant of 570 restricted stock units to director John Tsung-chen Chao vested on the third anniversary of its February 17, 2023 grant date. Upon vesting, those 570 RSUs converted into an equal number of Westlake common shares on a one-for-one basis.

Why were some Westlake (WLK) shares withheld in John Tsung-chen Chao’s Form 4 filing?

Westlake common shares were withheld to satisfy tax obligations from the vesting of John Tsung-chen Chao’s restricted stock units. Specifically, 242 shares that would otherwise have been issued were retained by the issuer as a tax-withholding disposition at a price of $98.95 per share.

What is John Tsung-chen Chao’s Westlake (WLK) common stock holding after these transactions?

Following the RSU conversion, tax-withholding disposition, and an ownership reconciliation, John Tsung-chen Chao directly holds 7,766 shares of Westlake common stock. The reconciliation added 400 shares that had been inadvertently omitted from prior Form 4 ownership reports.

What did the reconciliation note in John Tsung-chen Chao’s Westlake (WLK) filing explain?

The reconciliation note explains that 400 shares of Westlake common stock were inadvertently left out of John Tsung-chen Chao’s prior Form 4 filings. These shares are now included in his current reported direct ownership balance of 7,766 shares.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 02/19/2026 - 03:19 PM EST 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^*

Chao John Tsung-chen

(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)
02/17/2026

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	02/17/2026		M		570	A	$0(1)	7,608	D
Common Stock	02/18/2026		F		242(3)	D	$98.95	7,766(4)	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)	02/17/2026		M			570	(2)	(2)	Common Stock	570	$0	0	D

Explanation of Responses:

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

2. On February 17, 2023, the reporting person was granted 570 RSUs vesting on the third anniversay of the grant date.

3. Shares otherwise issuable were withheld to satisfy tax obligations arising out of the vesting of the reporting persons RSUs.

4. Following a reconciliation of the reporting person's ownership records, the balance includes 400 shares that were inadvertently omitted from the reporting person's prior Form 4s.

	John Chao by J Feng POA	02/19/2026
	** 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.