Mark Bender sells 1,654 shares at Westlake (WLK) per Form 144

Rhea-AI Filing Summary

Westlake insider sale reported by Mark Bender. The filing discloses two open-market dispositions: 445 common shares sold on 02/20/2026 for $41,874.14 and 1,209 common shares sold on 02/18/2026 for $119,630.55.

The filing also lists various issuer-granted equity awards and option exercises with grant dates and share counts as background; those amounts are presented in the excerpt but are context for the reporting of the dispositions.

Insights

Insider Transactions Compliance Expert

Form 144 reports two small officer/director dispositions totaling 1,654 shares.

The excerpt shows two reported sales: 445 shares on 02/20/2026 for $41,874.14 and 1,209 shares on 02/18/2026 for $119,630.55. These are open‑market dispositions reported under Section 144 procedures.

Background rows list issuer grants and an exercise with dated share counts (e.g., 12,693 shares tied to 02/27/2026); those figures are included as contextual holdings/issuances in the excerpt, not aggregated into the reported sale totals. Cash‑flow treatment is explicit for the 02/27/2026 exercise as Cash.

FAQ

What did Westlake (WLK) insider Mark Bender report on Form 144?

Mark Bender reported two dispositions: 1,209 shares sold on 02/18/2026 for $119,630.55 and 445 shares sold on 02/20/2026 for $41,874.14. The filing lists issuer grant dates and share counts as background.

How many shares in total did the Form 144 report Mark Bender sold for WLK?

The filing shows a total of 1,654 shares sold across two transactions (1,209 and 445). Monetary proceeds shown are $119,630.55 and $41,874.14, respectively.

Do the listed grant and exercise rows affect the reported sales in Form 144?

The grant and exercise entries are presented in the excerpt as background equity events with grant dates and share counts; they appear as contextual information and are not aggregated into the reported sale amounts.

Was any cash consideration or exercise method disclosed in the excerpt?

Yes. The row dated 02/27/2026 labeled 'Stock Option Exercise' shows 12,693 shares with Cash as the consideration method; other disposition rows list proceeds for the two sales above.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/27/2026 - 04:14 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001330417
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	WESTLAKE CORPORATION
SEC File Number	001-32260
Address of Issuer	2801 Post Oak Boulevard, Suite 600 Houston TEXAS 77056
Phone	(713) 960-9111
Name of Person for Whose Account the Securities are To Be Sold	MARK BENDER
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	30102	3003393.25	127910338	02/27/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/14/2023	Restricted Stock	Issuer			5365	02/14/2023	Not Applicable
Common	02/15/2022	Restricted Stock	Issuer			3584	02/15/2022	Not Applicable
Common	02/18/2025	Restricted Stock	Issuer			6038	02/18/2025	Not Applicable
Common	02/27/2026	Stock Option Exercise	Issuer			12693	02/27/2026	Cash
Common	02/16/2021	Restricted Stock	Issuer			2422	02/16/2021	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
MARK BENDER 2801 Post Oak Boulevard, Suite 600 Houston TX 77056	COMMON	02/20/2026	445	41874.14
MARK BENDER 2801 Post Oak Boulevard, Suite 600 Houston TX 77056	COMMON	02/18/2026	1209	119630.55

144: Remarks and Signature

Remarks
Date of Notice	02/27/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Mark Steven Bender
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)