Westlake (WLK) director receives equity awards and withholds shares

Rhea-AI Filing Summary

Westlake Corp director John Tsung-chen Chao reported multiple equity award transactions. On February 20, 2026, he received an employee stock option for 4,044 shares at an exercise price of $0.00 and two restricted stock unit (RSU) grants covering 1,104 and 2,434 RSUs, each RSU representing one share of common stock, with all RSUs vesting on February 20, 2029. On February 19, 2026, 213 shares of common stock vested upon satisfaction of performance criteria for previously granted performance stock units, and he acquired these shares as a grant. Also on February 20, 2026, 91 shares of common stock were disposed of at $94.10 per share to cover tax obligations related to PSU vesting, leaving him with 7,888 common shares directly owned.

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 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)
02/19/2026

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	02/19/2026		A		213(1)	A	$0	7,979	D
Common Stock	02/20/2026		F		91(2)	D	$94.1	7,888	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
Employee Option (right to buy)	$94.48	02/20/2026		A		4,044		(3)	02/20/2036	Common Stock	4,044	$0	4,044	D
Restricted Stock Units	(4)	02/20/2026		A		1,104		(5)	(5)	Common Stock	1,104	$0	1,104	D
Restricted Stock Units	(4)	02/20/2026		A		2,434		(5)	(5)	Common Stock	2,434	$0	2,434	D

Explanation of Responses:

1. Represents shares of common stock that vested on February 19, 2026, upon the determination by the Compensation Committee of the Issuer's Board of Directors of the satisfaction of performance criteria underlying an award of performance stock units ("PSUs") granted to the Reporting Person on February 17, 2023, under the terms of the Issuer's 2013 Omnibus Incentive Plan.

2. Shares otherwise issuable were witheld to satisfy tax obligations arising out of vesting of the Reporting Person's PSUs.

3. The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, respectively.

4. Each restricted stock unit ("RSU") represents a contingent right to recieve one share of the Issuer's common stock.

5. All of the RSUs will vest on February 20, 2029.

	John T. Chao by J. Feng, POA	02/23/2026
	** 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.

FAQ

What equity awards did Westlake (WLK) director John Tsung-chen Chao receive?

He received an option for 4,044 shares and two RSU grants for 1,104 and 2,434 units. Each RSU equals one common share, with all RSUs scheduled to vest on February 20, 2029 under Westlake’s incentive plan.

How many Westlake (WLK) shares vested from performance stock units for the director?

On February 19, 2026, 213 shares of common stock vested upon satisfaction of performance criteria tied to performance stock units granted in 2023. These shares were issued under Westlake’s 2013 Omnibus Incentive Plan after the compensation committee confirmed goal achievement.

Why did John Tsung-chen Chao dispose of Westlake (WLK) shares in this Form 4?

He disposed of 91 shares of common stock at $94.10 per share as a tax-withholding transaction. The shares were withheld to satisfy tax obligations arising from the vesting of his performance stock units, not as an open-market sale.

What is the vesting schedule of the new Westlake (WLK) stock options reported?

The 4,044-share stock option vests in three installments: 33%, 33%, and 34% on February 20, 2027, 2028, and 2029. This staged vesting aligns compensation with longer-term service and performance at Westlake Corp over several years.

When will the newly granted Westlake (WLK) RSUs to the director vest?

All newly granted RSUs, totaling 1,104 and 2,434 units, are scheduled to vest on February 20, 2029. Upon vesting, each RSU converts into one share of Westlake common stock, assuming continued satisfaction of the award’s terms.

How many Westlake (WLK) common shares does the director hold after these transactions?

Following these transactions, John Tsung-chen Chao directly owns 7,888 shares of Westlake common stock. This figure reflects the PSU-related vesting, the small tax-withholding disposition of 91 shares, and the updated post-transaction share balance.