WLK Form 144: 4,000 Shares Proposed, $461K Value

Morgan Stanley Smith Barney LLC filed a Form 144 notice for proposed sales of Common stock totaling 4,000 shares.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC filed a Form 144 notice for proposed sales of Common stock totaling 4,000 shares. The filing lists an aggregate value of $461,000.00 and cites 127,910,338 shares outstanding as of 03/30/2026. The filing also records recent dispositions by Robert Buesinger: 903 shares sold on 02/18/2026 for $89,351.85 and 326 shares sold on 02/20/2026 for $30,676.97. The securities identified for sale include 890 performance shares (02/19/2024) and 3,110 restricted stock units (08/13/2024).

Insights

Securities Attorney

Form 144 is a routine proposed resale notice under Rule 144; it records broker details, amounts, and recent dispositions.

Form 144 lists 4,000 shares to be sold through Morgan Stanley Smith Barney LLC with an aggregate value of $461,000.00. The filing documents recent open-market dispositions by Robert Buesinger on 02/18/2026 and 02/20/2026.

These notices are administrative: actual sales occur only if executed and are subject to Rule 144 conditions. Subsequent filings will report executed transactions and updated position data.

Equity Markets Analyst

Notable figures: 4,000 shares proposed, $461,000 aggregate, 127,910,338 shares outstanding (03/30/2026).

The filing provides scale: a $461,000.00 proposed resale against an outstanding base of 127,910,338 shares. The per-holder recent sales by Robert Buesinger are modest: 903 and 326 shares.

Execution and market impact depend on whether these notices convert to actual block trades; timing and method are not specified in the excerpt.

Key Figures

Proposed shares to be sold: 4,000 shares Aggregate offering value: $461,000.00 Shares outstanding: 127,910,338 shares +4 more

7 metrics

Proposed shares to be sold 4,000 shares aggregate resale quantity listed with broker

Aggregate offering value $461,000.00 aggregate value associated with the 4,000 shares

Shares outstanding 127,910,338 shares as of 03/30/2026

Sale on 02/18/2026 903 shares sold by Robert Buesinger for $89,351.85

Sale on 02/20/2026 326 shares sold by Robert Buesinger for $30,676.97

Performance shares 890 shares dated 02/19/2024, labeled Issuer

Restricted stock 3,110 shares dated 08/13/2024, labeled Issuer

Key Terms

Form 144, Performance Shares, Restricted Stock, Aggregate Value

4 terms

Form 144 regulatory

"Filed notice for proposed sale of securities under Rule 144"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Performance Shares financial

"Performance Shares | Issuer | 890 | 02/19/2024"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

Restricted Stock financial

"Restricted Stock | Issuer | 3110 | 08/13/2024"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Aggregate Value financial

"4000 | 461000.00 | 127910338 | 03/30/2026"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does WLK's Form 144 say about shares to be sold?

The notice lists 4,000 shares proposed for resale with an aggregate value of $461,000.00. It identifies Morgan Stanley Smith Barney LLC as the broker and records the outstanding share figure of 127,910,338 as of 03/30/2026.

Who reported recent sales in the Form 144 filing for WLK?

Robert Buesinger reported recent dispositions: 903 shares sold on 02/18/2026 for $89,351.85 and 326 shares sold on 02/20/2026 for $30,676.97. These are listed as sales in the past three months.

What types of securities are listed for potential sale in the WLK Form 144?

The filing lists performance shares (890, dated 02/19/2024) and restricted stock (3,110, dated 08/13/2024) as securities associated with the notice. These entries identify the origin as Issuer awards.

Does Form 144 confirm that the 4,000 shares were sold?

No. Form 144 is a proposed resale notice showing intent to sell 4,000 shares valued at $461,000.00; it does not itself confirm executed transactions. Executions would appear in subsequent transaction reports.

What outstanding share count does the filing provide for WLK?

The filing shows 127,910,338 shares outstanding as of 03/30/2026. That figure is presented alongside the proposed resale quantities and aggregate value in the notice.

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

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Accepted by SEC EDGAR 03/30/2026 - 05:57 PM EDT 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	0001488587
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	ROBERT BUESINGER
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	4000	461000.00	127910338	03/30/2026	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	02/19/2024	Performance Shares	Issuer			890	02/19/2024	Not Applicable
Common	08/13/2024	Restricted Stock	Issuer			3110	08/13/2024	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
ROBERT BUESINGER 2801 Post Oak Boulevard, Suite 600 Houston TX 77056	Common	02/20/2026	326	30676.97
ROBERT BUESINGER 2801 Post Oak Boulevard, Suite 600 Houston TX 77056	Common	02/18/2026	903	89351.85

144: Remarks and Signature

Remarks
Date of Notice	03/30/2026
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/ Robert Ford Buesinger
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)