[8-K] WESTLAKE CORP Reports Material Event

Rhea-AI Filing Summary

Westlake Corporation (WLK) furnished a press release announcing its third‑quarter 2025 results. The company also scheduled a conference call on October 30, 2025 to discuss the quarter and made an investor presentation available. The materials were provided as Exhibit 99.1 (press release) and Exhibit 99.2 (investor presentation) and were furnished, not filed, under the Exchange Act.

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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): October 30, 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, $0.01 par value			WLK			The New York Stock Exchange
1.625% Senior Notes due 2029			WLK29			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 2.02. Results of Operations and Financial Condition.

On October 30, 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 information furnished pursuant to this Current Report, including Exhibit 99.1, 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 Corporation under the Securities Act of 1933, as amended, unless specifically identified as being incorporated therein.

Item 7.01. Regulation FD Disclosure.

The Company is holding a conference call on October 30, 2025 to discuss its 2025 third quarter results. Information about the call can be found in the press release furnished with this Current Report as Exhibit 99.1. In addition, the Company made available an investor presentation regarding its 2025 third quarter results, which is furnished with this Current Report as Exhibit 99.2.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

The following exhibits are furnished herewith:

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

Date:

October 30, 2025

By:

/S/ JEAN-MARC GILSON

Jean-Marc Gilson President and Chief Executive Officer

FAQ

What did Westlake (WLK) announce in this 8-K?

Westlake furnished a press release announcing its third quarter 2025 results and made an investor presentation available.

When is Westlake’s Q3 2025 conference call?

The company scheduled a conference call on October 30, 2025 to discuss its Q3 2025 results.

Which exhibits did Westlake include with the Q3 2025 update?

Exhibit 99.1 is the press release and Exhibit 99.2 is the investor presentation.

Are the Q3 2025 materials furnished or filed?

They are furnished under the Exchange Act and not deemed filed unless specifically incorporated by reference.

What securities are listed for Westlake (WLK)?

The filing lists Common Stock (WLK) and 1.625% Senior Notes due 2029 (WLK29) on the NYSE.