UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): ~~October~~November 304, 2025

Westlake Corporation

(Exact name of registrant as specified in its charter)

Delaware

001-32260

76-0346924

~~001-32260~~

~~76-0346924~~

(State or other jurisdictionof incorporation)

(Commission File Number)

(I.R.S. EmployerIdentification No.)

(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)

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

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))

☐	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)	~~Trading Symbol(s)~~	Name of each exchange on which registered	~~Name of each exchange on which registered~~
Common Stock, $0.01 par value		WLK		The New York Stock Exchange
Common Stock	WLK		The New York Stock Exchange
1.625% Senior Notes due 2029	WLK 29	~~WLK29~~	The New York Stock Exchange	~~The New York Stock Exchange~~

Indicate by check mark whether the registrant is an emerging growth company as defined in ~~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 2 7.~~02.~~01 ~~Results~~Regulation ofFD ~~Operations and Financial Condition.~~Disclosure

OnTender ~~October 30,~~Offer ~~2025, Westlake Corporation (the "Company"), issued a press release announcing its 2025 third quarter results. A copy of the press release is furnished with this Current Report as Exhibit 99.1.~~

~~The~~On ~~information~~November 4, ~~furnished~~2025, ~~pursuant~~Westlake toCorporation ~~this~~(the ~~Current~~“Company”) ~~Report,~~issued ~~including~~a ~~Exhibit~~press ~~99.1,~~release ~~shall~~announcing ~~not~~the becommencement ~~deemed~~of toa becash ~~"filed"~~tender ~~for~~offer (the ~~purposes~~“Tender ofOffer”) ~~Section 18~~for any and all of ~~the~~its ~~Securities~~outstanding ~~Exchange~~3.600% ~~Act~~Senior ofNotes ~~1934,~~due as2026. ~~amended,~~The ~~and~~Tender ~~will~~Offer ~~not~~is besubject ~~incorporated~~to bythe ~~reference~~terms ~~into~~and ~~any~~conditions ~~registration~~set ~~statement~~forth ~~filed~~in bythe ~~Westlake~~Offer ~~Corporation~~to ~~under~~Purchase, ~~the~~dated ~~Securities~~November 4, ~~Act~~2025. A copy of ~~1933,~~the press release is attached as ~~amended,~~Exhibit ~~unless~~99.1 ~~specifically~~to ~~identified~~this asreport ~~being~~and is incorporated ~~therein~~by reference herein.

~~Item 7.01.~~Senior ~~Regulation~~Notes FDOffering ~~Disclosure.~~

~~The~~On ~~Company~~November 4, is2025 ~~holding~~the aCompany ~~conference~~issued ~~call~~a onpress ~~October 30,~~release ~~2025~~announcing ~~to discuss~~ its ~~2025~~intention ~~third~~to ~~quarter~~offer ~~results.~~senior ~~Information~~unsecured ~~about~~notes (the ~~call~~“Notes”) ~~can~~in bean ~~found~~underwritten inpublic ~~the~~offering ~~press~~pursuant ~~release~~to ~~furnished~~the ~~with~~Company’s ~~this~~registration ~~Current~~statement ~~Report~~on asForm ~~Exhibit~~S-3 99(File No.1. 333-291208) ~~In addition,~~ (the ~~Company~~“Notes ~~made~~Offering”). ~~available~~A ancopy ~~investor~~of ~~presentation~~the ~~regarding~~press ~~its~~release ~~2025~~is ~~third~~attached ~~quarter~~as ~~results,~~Exhibit ~~which~~99.2 isto ~~furnished~~this ~~with~~report ~~this~~and ~~Current~~is ~~Report~~incorporated asherein ~~Exhibit~~by 99reference.2.

The information furnished pursuant to this Item 9 7.01, including Exhibits 99.1 ~~Financial~~and ~~Statements~~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 ~~Exhibits~~will not be incorporated by reference into any registration statement filed by the Company under the Securities Act unless specifically identified as being incorporated therein.

This Current Report on Form 8-K does not constitute an offer to purchase securities or a solicitation of an offer to sell any securities or an offer to sell or the solicitation of an offer to purchase any securities nor does it constitute an offer or solicitation in any jurisdiction in which such offer or solicitation is unlawful.

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits

The following exhibits are furnished herewith:


Exhibit Number		Description

99.1		Press Release issued by Westlake Corporation on November 4, 2025 announcing commencement of the Tender Offer.

99.2		Press Release issued by Westlake Corporation on November 4, 2025 announcing commencement of the Notes Offering.

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

99.1 Press release issued on October 30, 2025.

99.2 Investor Presentation.

104 The cover page from this Current Report on Form 8-K, 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

~~WESTLAKE CORPORATION~~

Date:

October 30, 2025

By:

/S/ JEAN-MARC GILSON

Date: November 4, 2025

By:

/s/ L. Benjamin Ederington

Jean-Marc GilsonPresident and Chief Executive Officer

L. Benjamin Ederington

Executive Vice President, Legal and External Affairs

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