Westlake (NYSE: WLK) chair receives options, RSUs and tax-share disposal

Rhea-AI Filing Summary

Westlake Corp Executive Chairman Albert Chao reported several equity compensation transactions. He received a grant of 54,763 employee stock options on common shares and 14,945 restricted stock units, both at a grant price of $0.00 per unit. The options become exercisable in three installments of 33%, 33%, and 34% on February 20, 2027, February 20, 2028, and February 20, 2029, respectively, and all RSUs vest on February 20, 2029. He also acquired 6,193 shares of common stock upon vesting of performance stock units tied to performance criteria. To cover tax obligations from this vesting, 2,501 common shares were disposed of at a weighted average price of about $94.10 per share, in multiple transactions within a disclosed price range.

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 Albert

(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)
	Executive Chairman

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		6,193(1)	A	$0	645,381	D
Common Stock	02/20/2026		F		2,501(2)	D	$94.101(3)	642,880	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		54,763		(4)	02/20/2036	Common Stock	54,763	$0	54,763	D
Restricted Stock Units	(5)	02/20/2026		A		14,945		(6)	(6)	Common Stock	14,945	$0	14,945	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. Weighted average price. These shares were sold in multiple transactions at prices ranging from $94.10 to $94.38, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

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

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

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

	Albert 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.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What equity awards did Westlake (WLK) Executive Chairman Albert Chao receive?

Albert Chao received 54,763 employee stock options and 14,945 restricted stock units, both granted at a price of $0.00 per unit. These awards form part of his equity compensation and are subject to multi-year vesting schedules ending in 2029.

How and when do Albert Chao’s new Westlake (WLK) stock options vest?

Chao’s 54,763 stock options vest in three installments: 33%, 33%, and 34% on February 20, 2027, February 20, 2028, and February 20, 2029. This staged vesting links his long-term incentives to Westlake’s sustained performance and his continued service.

What is the vesting schedule for Albert Chao’s Westlake (WLK) RSUs?

All 14,945 restricted stock units granted to Albert Chao will vest on February 20, 2029. Each RSU represents a contingent right to receive one share of Westlake common stock once vesting conditions and continued service requirements are met.

Why did Albert Chao dispose of Westlake (WLK) shares in this Form 4?

Chao disposed of 2,501 Westlake common shares to satisfy tax obligations arising from vesting performance stock units. The shares were disposed of at a weighted average price around $94.10 per share, across multiple transactions within a stated price range.

How many Westlake (WLK) shares did Albert Chao gain from performance stock units?

Chao acquired 6,193 Westlake common shares when performance stock units granted in February 2023 vested. Vesting occurred after the compensation committee determined that the underlying performance criteria had been satisfied under the company’s 2013 Omnibus Incentive Plan.

Do Albert Chao’s new RSUs convert into Westlake (WLK) common stock one-for-one?

Yes. Each restricted stock unit granted to Albert Chao represents a contingent right to receive one share of Westlake common stock. Conversion occurs when the RSUs fully vest on February 20, 2029, assuming all vesting conditions are satisfied.