Westlake (NYSE: WLK) SVP gets stock options, RSUs and vested shares

Rhea-AI Filing Summary

Westlake Corp SVP Scott Thomas Szwejbka reported several equity compensation transactions. On February 20, 2026, he received an employee stock option grant for 14,595 shares at an exercise price of $0.00 per share and 3,983 restricted stock units, both held directly.

On February 19, 2026, 365 shares of common stock were acquired following the vesting of performance stock units granted on February 17, 2023, after performance criteria were certified. Also on February 20, 2026, 91 shares of common stock were disposed of at $94.10 per share to satisfy tax obligations from the PSU vesting, leaving 13,773 common shares held directly.

Insider Trade Summary

4 transactions reported

Mixed 4 txns

Insider Szwejbka Scott Thomas

Role SVP, HIP Segment Head

Type	Security	Shares	Price	Value
Grant/Award	Employee Option (right to buy)	14,595	$0.00	--
Grant/Award	Restricted Stock Units	3,983	$0.00	--
Tax Withholding	Common Stock	91	$94.10	$9K
Grant/Award	Common Stock	365	$0.00	--

Holdings After Transaction: Employee Option (right to buy) — 14,595 shares (Direct); Restricted Stock Units — 3,983 shares (Direct); Common Stock — 13,773 shares (Direct)

Footnotes (1)

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. Shares otherwise issuable were witheld to satisfy tax obligations arising out of vesting of the Reporting Person's PSUs. The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, respectively. Each restricted stock unit ("RSU") represents a contingent right to recieve one share of the Issuer's common stock. All of the RSUs will vest on February 20, 2029.

Form 4 Insider Transactions: What Each Field Means →

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
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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^*

Szwejbka Scott Thomas

(Last) (First) (Middle)

2801 POST OAK BLVD., SUITE 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, HIP Segment Head

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		365(1)	A	$0	13,864	D
Common Stock	02/20/2026		F		91(2)	D	$94.1	13,773	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		14,595		(3)	02/20/2036	Common Stock	14,595	$0	14,595	D
Restricted Stock Units	(4)	02/20/2026		A		3,983		(5)	(5)	Common Stock	3,983	$0	3,983	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.

	Scott T. Szwejbka 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.
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FAQ

What equity awards did Westlake (WLK) SVP Scott Thomas Szwejbka receive?

He received a stock option grant for 14,595 shares and 3,983 restricted stock units. These awards were reported as direct holdings and form part of his long-term equity compensation from Westlake under its omnibus incentive plan.

When do Scott Szwejbka’s Westlake (WLK) stock options and RSUs vest?

The stock options vest in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029. All 3,983 restricted stock units are scheduled to vest on February 20, 2029, according to the reported footnotes.

What triggered the 365-share common stock acquisition for Westlake (WLK) SVP?

The 365 common shares reflect vesting on February 19, 2026 of performance stock units granted on February 17, 2023. Vesting occurred after Westlake’s compensation committee determined that underlying performance criteria had been satisfied under the company’s incentive plan.

Why did Scott Szwejbka dispose of 91 Westlake (WLK) shares?

The 91-share disposition at $94.10 per share was to cover tax obligations from vesting performance stock units. The transaction was reported with code “F,” indicating payment of tax liability by delivering securities rather than an open-market sale.

How many Westlake (WLK) common shares does Scott Szwejbka hold after these transactions?

Following the reported transactions, he directly holds 13,773 shares of Westlake common stock. This figure reflects the net position after PSU-related vesting and the 91-share disposition to satisfy associated tax obligations on February 20, 2026.

What does each Westlake (WLK) restricted stock unit represent in this Form 4?

Each restricted stock unit represents a contingent right to receive one share of Westlake’s common stock. The reported 3,983 RSUs therefore correspond to an equal number of potential future common shares, subject to vesting on February 20, 2029.