Westlake Corp (WLK) SVP reports RSU vesting and tax share withholding

Rhea-AI Filing Summary

Westlake Corp senior vice president Scott Thomas Szwejbka reported equity award activity involving restricted stock units and common shares. On February 17, 2026, 977 restricted stock units vested and were converted on a one-for-one basis into 977 shares of common stock. On February 18, 2026, 295 of those shares were withheld at a reference price of $98.95 per share to cover tax obligations arising from the RSU vesting. After these transactions, Szwejbka directly owned 13,499 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^*

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)
02/17/2026

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		977	A	$0(1)	13,794	D
Common Stock	02/18/2026		F		295(3)	D	$98.95	13,499	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			977	(2)	(2)	Common Stock	977	$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 977 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.

	Scott T. Szwejbka 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 Westlake Corp (WLK) report for Scott Thomas Szwejbka?

Westlake Corp reported that SVP Scott Thomas Szwejbka had 977 restricted stock units vest and convert into 977 common shares, followed by a tax-withholding disposition of 295 common shares related to that vesting event.

How many Westlake Corp (WLK) shares does Scott Thomas Szwejbka own after this Form 4?

After the reported RSU vesting and related tax withholding, Scott Thomas Szwejbka directly owns 13,499 shares of Westlake Corp common stock, as disclosed in the Form 4 insider transaction report.

What does the RSU transaction for Westlake Corp (WLK) on February 17, 2026 represent?

The February 17, 2026 transaction reflects the exercise and conversion of 977 restricted stock units into 977 shares of Westlake Corp common stock, following a grant originally awarded on February 17, 2023 that vested on the third anniversary.

Why were 295 Westlake Corp (WLK) shares disposed of in the Form 4 filing?

The 295 shares were withheld to satisfy tax obligations arising from the vesting of Scott Thomas Szwejbka’s restricted stock units. This disposition, priced at $98.95 per share, was reported under transaction code F for tax-withholding purposes.

What is the conversion ratio of Westlake Corp (WLK) restricted stock units to common stock?

Each restricted stock unit converts into one share of Westlake Corp common stock. The Form 4 states that RSUs convert into the issuer's common stock on a one-for-one basis when they vest, as occurred with the 977-unit grant.

When were the restricted stock units for Westlake Corp (WLK) originally granted to Szwejbka?

The 977 restricted stock units were granted to Scott Thomas Szwejbka on February 17, 2023. They vested on the third anniversary of the grant date, triggering their conversion into common shares and the associated tax-withholding share disposition.