UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): November 10, 2025

Westlake Corporation

(Exact name of registrant as specified in its charter)

Delaware

001-32260

76-0346924

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

2801 Post Oak Boulevard, Suite 600

Houston, Texas

77056

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (713) 960-9111

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock	WLK	The New York Stock Exchange
1.625% Senior Notes due 2029	WLK 29	The New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01

Regulation FD Disclosure.

On November 10, 2025, Westlake Corporation (“Westlake”) issued a press release (the “Pricing Press Release”) attached hereto as Exhibit 99.1, announcing the pricing of its previously announced cash tender offer (the “Tender Offer”) for any and all of its outstanding 3.600% Senior Notes due 2026. On November 10, 2025, Westlake issued a press release (the “Results Press Release”) attached hereto as Exhibit 99.2, announcing the expiration and results of the Tender Offer. The Pricing Press Release and the Results Press Release are incorporated by reference herein. The Tender Offer is subject to the terms and conditions set forth in the Offer to Purchase, dated November 4, 2025.

The information furnished pursuant to this Item 7.01, including Exhibits 99.1 and 99.2, shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and will not be incorporated by reference into any registration statement filed by Westlake under the Securities Act of 1933, as amended, unless specifically identified as being incorporated therein.

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits


Exhibit Number		Description

99.1		Press Release issued by Westlake Corporation on November 10, 2025 announcing pricing of the Tender Offer.

99.2		Press Release issued by Westlake Corporation on November 10, 2025 announcing expiration and results of the Tender Offer.

104		Cover Page Interactive Data File, formatted in Inline XBRL.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

WESTLAKE CORPORATION

Date: November 12, 2025

/s/ L. Benjamin Ederington

L. Benjamin Ederington

Executive Vice President, Legal and External Affairs

WESTLAKE CORP 8-K