Westlake Corp (WLK) Senior Chairman logs RSU vesting and tax share disposition

Rhea-AI Filing Summary

Westlake Corp Senior Chairman James Chao reported equity award activity and related tax withholding. On February 17, 2026, 10,382 restricted stock units converted on a one-for-one basis into 10,382 shares of common stock at a stated price of $0.00 per share, reflecting vesting of RSUs granted on February 17, 2023.

On February 18, 2026, 2,664 common shares were disposed of at $98.95 per share to satisfy tax obligations arising from the RSU vesting, rather than through an open-market sale. After these transactions, Chao directly held 47,459 shares of Westlake common stock.

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

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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^*

Chao James

(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
X	Officer (give title below)		Other (specify below)
	Senior Chairman

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		10,382	A	$0(1)	50,123	D
Common Stock	02/18/2026		F		2,664(3)	D	$98.95	47,459	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			10,382	(2)	(2)	Common Stock	10,382	$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 10,382 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.

	James 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.
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FAQ

What insider transactions did James Chao report at Westlake Corp (WLK)?

James Chao reported RSU vesting and a related tax-withholding share disposition. 10,382 restricted stock units converted into common shares, and 2,664 shares were withheld and disposed of to cover tax obligations tied to the vesting, rather than representing an open-market sale.

How many Westlake Corp (WLK) RSUs vested for James Chao and when?

10,382 restricted stock units vested and converted into common stock for James Chao. These RSUs were originally granted on February 17, 2023 and vested on the third anniversary of the grant date, triggering a one-for-one conversion into Westlake common shares.

Why did James Chao dispose of 2,664 Westlake Corp (WLK) shares?

2,664 shares were disposed of to satisfy tax obligations from RSU vesting. The filing states that shares otherwise issuable were withheld specifically to cover taxes arising from the vesting of the restricted stock units, rather than reflecting a discretionary open-market share sale.

What is James Chao’s direct Westlake Corp (WLK) share ownership after these transactions?

After the reported transactions, James Chao directly owned 47,459 Westlake common shares. This figure reflects the net result of 10,382 RSUs converting into common stock and 2,664 shares being withheld and disposed of to cover associated tax liabilities from the RSU vesting.

Were James Chao’s Westlake Corp (WLK) transactions open-market buys or sells?

The transactions involved RSU conversion and tax withholding, not open-market trades. RSUs converted into common stock at a stated price of $0.00, and 2,664 shares were disposed of under code F specifically to pay tax liabilities tied to the vesting event.

On what dates did James Chao’s Westlake Corp (WLK) equity events occur?

The RSU conversion into common stock occurred on February 17, 2026. The tax-withholding disposition of 2,664 common shares took place on February 18, 2026, one day after the vesting-driven conversion from restricted stock units to Westlake common shares.